Merge branch 'master' into diff-line-comment-vuejs

# Conflicts:
#	app/models/discussion.rb
#	db/schema.rb

110 files changed, 940 insertions, 767 deletions

diff --git a/app/assets/images/switch_icon.png b/app/assets/images/switch_icon.png
deleted file mode 100644
index c6b6c8d9521..00000000000
--- a/app/assets/images/switch_icon.png
+++ /dev/null
diff --git a/app/assets/images/trans_bg.gif b/app/assets/images/trans_bg.gif
deleted file mode 100644
index 1a1c9c15ec7..00000000000
--- a/app/assets/images/trans_bg.gif
+++ /dev/null
diff --git a/app/assets/javascripts/build.js b/app/assets/javascripts/build.js
index e135cb92a30..3d9b824d406 100644
--- a/app/assets/javascripts/build.js
+++ b/app/assets/javascripts/build.js
@@ -128,7 +128,7 @@
       $date = $('.js-artifacts-remove');
       if ($date.length) {
         date = $date.text();
-        return $date.text($.timefor(new Date(date), ' '));
+        return $date.text($.timefor(new Date(date.replace(/-/g, '/')), ' '));
       }
     };
 
diff --git a/app/assets/javascripts/dispatcher.js b/app/assets/javascripts/dispatcher.js
index d212d66da1b..9e6901962c6 100644
--- a/app/assets/javascripts/dispatcher.js
+++ b/app/assets/javascripts/dispatcher.js
@@ -171,6 +171,11 @@
           break;
         case 'search:show':
           new Search();
+          break;
+        case 'projects:protected_branches:index':
+          new ProtectedBranchesAccessSelect($(".new_protected_branch"), false, true);
+          new ProtectedBranchesAccessSelect($(".protected-branches-list"), true, false);
+          break;
       }
       switch (path.first()) {
         case 'admin':
diff --git a/app/assets/javascripts/gfm_auto_complete.js b/app/assets/javascripts/gfm_auto_complete.js
index 41f4c1914f2..2e5b15f4b77 100644
--- a/app/assets/javascripts/gfm_auto_complete.js
+++ b/app/assets/javascripts/gfm_auto_complete.js
@@ -47,8 +47,8 @@
         }
       }
     },
-    setup: function(wrap) {
-      this.input = $('.js-gfm-input');
+    setup: function(input) {
+      this.input = input || $('.js-gfm-input');
       this.destroyAtWho();
       this.setupAtWho();
       if (this.dataSource) {
diff --git a/app/assets/javascripts/gl_form.js b/app/assets/javascripts/gl_form.js
index 6ac7564a848..528a673eb15 100644
--- a/app/assets/javascripts/gl_form.js
+++ b/app/assets/javascripts/gl_form.js
@@ -21,7 +21,7 @@
         this.form.find('.div-dropzone').remove();
         this.form.addClass('gfm-form');
         disableButtonIfEmptyField(this.form.find('.js-note-text'), this.form.find('.js-comment-button'));
-        GitLab.GfmAutoComplete.setup();
+        GitLab.GfmAutoComplete.setup(this.form.find('.js-gfm-input'));
         new DropzoneInput(this.form);
         autosize(this.textarea);
         this.addEventListeners();
diff --git a/app/assets/javascripts/lib/utils/md5.js b/app/assets/javascripts/lib/utils/md5.js
deleted file mode 100644
index b63716eaad2..00000000000
--- a/app/assets/javascripts/lib/utils/md5.js
+++ /dev/null
@@ -1,211 +0,0 @@
-function md5 (str) {
-  // http://kevin.vanzonneveld.net
-  // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
-  // + namespaced by: Michael White (http://getsprink.com)
-  // +    tweaked by: Jack
-  // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
-  // +      input by: Brett Zamir (http://brett-zamir.me)
-  // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
-  // -    depends on: utf8_encode
-  // *     example 1: md5('Kevin van Zonneveld');
-  // *     returns 1: '6e658d4bfcb59cc13f96c14450ac40b9'
-  var xl;
-
-  var rotateLeft = function (lValue, iShiftBits) {
-    return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
-  };
-
-  var addUnsigned = function (lX, lY) {
-    var lX4, lY4, lX8, lY8, lResult;
-    lX8 = (lX & 0x80000000);
-    lY8 = (lY & 0x80000000);
-    lX4 = (lX & 0x40000000);
-    lY4 = (lY & 0x40000000);
-    lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
-    if (lX4 & lY4) {
-      return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
-    }
-    if (lX4 | lY4) {
-      if (lResult & 0x40000000) {
-        return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
-      } else {
-        return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
-      }
-    } else {
-      return (lResult ^ lX8 ^ lY8);
-    }
-  };
-
-  var _F = function (x, y, z) {
-    return (x & y) | ((~x) & z);
-  };
-  var _G = function (x, y, z) {
-    return (x & z) | (y & (~z));
-  };
-  var _H = function (x, y, z) {
-    return (x ^ y ^ z);
-  };
-  var _I = function (x, y, z) {
-    return (y ^ (x | (~z)));
-  };
-
-  var _FF = function (a, b, c, d, x, s, ac) {
-    a = addUnsigned(a, addUnsigned(addUnsigned(_F(b, c, d), x), ac));
-    return addUnsigned(rotateLeft(a, s), b);
-  };
-
-  var _GG = function (a, b, c, d, x, s, ac) {
-    a = addUnsigned(a, addUnsigned(addUnsigned(_G(b, c, d), x), ac));
-    return addUnsigned(rotateLeft(a, s), b);
-  };
-
-  var _HH = function (a, b, c, d, x, s, ac) {
-    a = addUnsigned(a, addUnsigned(addUnsigned(_H(b, c, d), x), ac));
-    return addUnsigned(rotateLeft(a, s), b);
-  };
-
-  var _II = function (a, b, c, d, x, s, ac) {
-    a = addUnsigned(a, addUnsigned(addUnsigned(_I(b, c, d), x), ac));
-    return addUnsigned(rotateLeft(a, s), b);
-  };
-
-  var convertToWordArray = function (str) {
-    var lWordCount;
-    var lMessageLength = str.length;
-    var lNumberOfWords_temp1 = lMessageLength + 8;
-    var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64;
-    var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
-    var lWordArray = new Array(lNumberOfWords - 1);
-    var lBytePosition = 0;
-    var lByteCount = 0;
-    while (lByteCount < lMessageLength) {
-      lWordCount = (lByteCount - (lByteCount % 4)) / 4;
-      lBytePosition = (lByteCount % 4) * 8;
-      lWordArray[lWordCount] = (lWordArray[lWordCount] | (str.charCodeAt(lByteCount) << lBytePosition));
-      lByteCount++;
-    }
-    lWordCount = (lByteCount - (lByteCount % 4)) / 4;
-    lBytePosition = (lByteCount % 4) * 8;
-    lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
-    lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
-    lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
-    return lWordArray;
-  };
-
-  var wordToHex = function (lValue) {
-    var wordToHexValue = "",
-      wordToHexValue_temp = "",
-      lByte, lCount;
-    for (lCount = 0; lCount <= 3; lCount++) {
-      lByte = (lValue >>> (lCount * 8)) & 255;
-      wordToHexValue_temp = "0" + lByte.toString(16);
-      wordToHexValue = wordToHexValue + wordToHexValue_temp.substr(wordToHexValue_temp.length - 2, 2);
-    }
-    return wordToHexValue;
-  };
-
-  var x = [],
-    k, AA, BB, CC, DD, a, b, c, d, S11 = 7,
-    S12 = 12,
-    S13 = 17,
-    S14 = 22,
-    S21 = 5,
-    S22 = 9,
-    S23 = 14,
-    S24 = 20,
-    S31 = 4,
-    S32 = 11,
-    S33 = 16,
-    S34 = 23,
-    S41 = 6,
-    S42 = 10,
-    S43 = 15,
-    S44 = 21;
-
-  str = this.utf8_encode(str);
-  x = convertToWordArray(str);
-  a = 0x67452301;
-  b = 0xEFCDAB89;
-  c = 0x98BADCFE;
-  d = 0x10325476;
-
-  xl = x.length;
-  for (k = 0; k < xl; k += 16) {
-    AA = a;
-    BB = b;
-    CC = c;
-    DD = d;
-    a = _FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
-    d = _FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
-    c = _FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
-    b = _FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
-    a = _FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
-    d = _FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
-    c = _FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
-    b = _FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
-    a = _FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
-    d = _FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
-    c = _FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
-    b = _FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
-    a = _FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
-    d = _FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
-    c = _FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
-    b = _FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
-    a = _GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
-    d = _GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
-    c = _GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
-    b = _GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
-    a = _GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
-    d = _GG(d, a, b, c, x[k + 10], S22, 0x2441453);
-    c = _GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
-    b = _GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
-    a = _GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
-    d = _GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
-    c = _GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
-    b = _GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
-    a = _GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
-    d = _GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
-    c = _GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
-    b = _GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
-    a = _HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
-    d = _HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
-    c = _HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
-    b = _HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
-    a = _HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
-    d = _HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
-    c = _HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
-    b = _HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
-    a = _HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
-    d = _HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
-    c = _HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
-    b = _HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
-    a = _HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
-    d = _HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
-    c = _HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
-    b = _HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
-    a = _II(a, b, c, d, x[k + 0], S41, 0xF4292244);
-    d = _II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
-    c = _II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
-    b = _II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
-    a = _II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
-    d = _II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
-    c = _II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
-    b = _II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
-    a = _II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
-    d = _II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
-    c = _II(c, d, a, b, x[k + 6], S43, 0xA3014314);
-    b = _II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
-    a = _II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
-    d = _II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
-    c = _II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
-    b = _II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
-    a = addUnsigned(a, AA);
-    b = addUnsigned(b, BB);
-    c = addUnsigned(c, CC);
-    d = addUnsigned(d, DD);
-  }
-
-  var temp = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
-
-  return temp.toLowerCase();
-}
diff --git a/app/assets/javascripts/lib/utils/utf8_encode.js b/app/assets/javascripts/lib/utils/utf8_encode.js
deleted file mode 100644
index 39ffe44dae0..00000000000
--- a/app/assets/javascripts/lib/utils/utf8_encode.js
+++ /dev/null
@@ -1,70 +0,0 @@
-function utf8_encode (argString) {

-  // http://kevin.vanzonneveld.net

-  // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)

-  // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)

-  // +   improved by: sowberry

-  // +    tweaked by: Jack

-  // +   bugfixed by: Onno Marsman

-  // +   improved by: Yves Sucaet

-  // +   bugfixed by: Onno Marsman

-  // +   bugfixed by: Ulrich

-  // +   bugfixed by: Rafal Kukawski

-  // +   improved by: kirilloid

-  // +   bugfixed by: kirilloid

-  // *     example 1: utf8_encode('Kevin van Zonneveld');

-  // *     returns 1: 'Kevin van Zonneveld'

-

-  if (argString === null || typeof argString === "undefined") {

-    return "";

-  }

-

-  var string = (argString + ''); // .replace(/\r\n/g, "\n").replace(/\r/g, "\n");

-  var utftext = '',

-    start, end, stringl = 0;

-

-  start = end = 0;

-  stringl = string.length;

-  for (var n = 0; n < stringl; n++) {

-    var c1 = string.charCodeAt(n);

-    var enc = null;

-

-    if (c1 < 128) {

-      end++;

-    } else if (c1 > 127 && c1 < 2048) {

-      enc = String.fromCharCode(

-         (c1 >> 6)        | 192,

-        ( c1        & 63) | 128

-      );

-    } else if (c1 & 0xF800 != 0xD800) {

-      enc = String.fromCharCode(

-         (c1 >> 12)       | 224,

-        ((c1 >> 6)  & 63) | 128,

-        ( c1        & 63) | 128

-      );

-    } else { // surrogate pairs

-      if (c1 & 0xFC00 != 0xD800) { throw new RangeError("Unmatched trail surrogate at " + n); }

-      var c2 = string.charCodeAt(++n);

-      if (c2 & 0xFC00 != 0xDC00) { throw new RangeError("Unmatched lead surrogate at " + (n-1)); }

-      c1 = ((c1 & 0x3FF) << 10) + (c2 & 0x3FF) + 0x10000;

-      enc = String.fromCharCode(

-         (c1 >> 18)       | 240,

-        ((c1 >> 12) & 63) | 128,

-        ((c1 >> 6)  & 63) | 128,

-        ( c1        & 63) | 128

-      );

-    }

-    if (enc !== null) {

-      if (end > start) {

-        utftext += string.slice(start, end);

-      }

-      utftext += enc;

-      start = end = n + 1;

-    }

-  }

-

-  if (end > start) {

-    utftext += string.slice(start, stringl);

-  }

-

-  return utftext;

-}

diff --git a/app/assets/javascripts/protected_branches.js b/app/assets/javascripts/protected_branches.js
deleted file mode 100644
index db21a19964d..00000000000
--- a/app/assets/javascripts/protected_branches.js
+++ /dev/null
@@ -1,35 +0,0 @@
-(function() {
-  $(function() {
-    return $(".protected-branches-list :checkbox").change(function(e) {
-      var can_push, id, name, obj, url;
-      name = $(this).attr("name");
-      if (name === "developers_can_push" || name === "developers_can_merge") {
-        id = $(this).val();
-        can_push = $(this).is(":checked");
-        url = $(this).data("url");
-        return $.ajax({
-          type: "PATCH",
-          url: url,
-          dataType: "json",
-          data: {
-            id: id,
-            protected_branch: (
-              obj = {},
-              obj["" + name] = can_push,
-              obj
-            )
-          },
-          success: function() {
-            var row;
-            row = $(e.target);
-            return row.closest('tr').effect('highlight');
-          },
-          error: function() {
-            return new Flash("Failed to update branch!", "alert");
-          }
-        });
-      }
-    });
-  });
-
-}).call(this);
diff --git a/app/assets/javascripts/protected_branches_access_select.js.es6 b/app/assets/javascripts/protected_branches_access_select.js.es6
new file mode 100644
index 00000000000..e98312bbf37
--- /dev/null
+++ b/app/assets/javascripts/protected_branches_access_select.js.es6
@@ -0,0 +1,63 @@
+class ProtectedBranchesAccessSelect {
+  constructor(container, saveOnSelect, selectDefault) {
+    this.container = container;
+    this.saveOnSelect = saveOnSelect;
+
+    this.container.find(".allowed-to-merge").each((i, element) => {
+      var fieldName = $(element).data('field-name');
+      var dropdown = $(element).glDropdown({
+        data: gon.merge_access_levels,
+        selectable: true,
+        fieldName: fieldName,
+        clicked: _.chain(this.onSelect).partial(element).bind(this).value()
+      });
+
+      if (selectDefault) {
+        dropdown.data('glDropdown').selectRowAtIndex(document.createEvent("Event"), 0);
+      }
+    });
+
+
+    this.container.find(".allowed-to-push").each((i, element) => {
+      var fieldName = $(element).data('field-name');
+      var dropdown = $(element).glDropdown({
+        data: gon.push_access_levels,
+        selectable: true,
+        fieldName: fieldName,
+        clicked: _.chain(this.onSelect).partial(element).bind(this).value()
+      });
+
+      if (selectDefault) {
+        dropdown.data('glDropdown').selectRowAtIndex(document.createEvent("Event"), 0);
+      }
+    });
+  }
+
+  onSelect(dropdown, selected, element, e) {
+    $(dropdown).find('.dropdown-toggle-text').text(selected.text);
+    if (this.saveOnSelect) {
+      return $.ajax({
+        type: "POST",
+        url: $(dropdown).data('url'),
+        dataType: "json",
+        data: {
+          _method: 'PATCH',
+          id: $(dropdown).data('id'),
+          protected_branch: {
+            ["" + ($(dropdown).data('type')) + "_attributes"]: {
+              "access_level": selected.id
+            }
+          }
+        },
+        success: function() {
+          var row;
+          row = $(e.target);
+          return row.closest('tr').effect('highlight');
+        },
+        error: function() {
+          return new Flash("Failed to update branch!", "alert");
+        }
+      });
+    }
+  }
+}
diff --git a/app/assets/stylesheets/framework/nav.scss b/app/assets/stylesheets/framework/nav.scss
index 364952d3b4a..7852fc9a424 100644
--- a/app/assets/stylesheets/framework/nav.scss
+++ b/app/assets/stylesheets/framework/nav.scss
@@ -182,7 +182,6 @@
 
     > form {
       display: inline-block;
-      margin-top: -1px;
     }
 
     .icon-label {
@@ -193,7 +192,6 @@
       height: 35px;
       display: inline-block;
       position: relative;
-      top: 2px;
       margin-right: $gl-padding-top;
 
       /* Medium devices (desktops, 992px and up) */
diff --git a/app/assets/stylesheets/pages/commits.scss b/app/assets/stylesheets/pages/commits.scss
index 0298577c494..6a58b445afa 100644
--- a/app/assets/stylesheets/pages/commits.scss
+++ b/app/assets/stylesheets/pages/commits.scss
@@ -1,8 +1,6 @@
 .commits-compare-switch {
   @include btn-default;
   @include btn-white;
-  background: image-url("switch_icon.png") no-repeat center center;
-  text-indent: -9999px;
   float: left;
   margin-right: 9px;
 }
@@ -61,6 +59,10 @@
     font-size: 0;
   }
 
+  .ci-status-link {
+    display: inline-block;
+  }
+
   .btn-clipboard, .btn-transparent {
     padding-left: 0;
     padding-right: 0;
diff --git a/app/assets/stylesheets/pages/diff.scss b/app/assets/stylesheets/pages/diff.scss
index 21b1c223c88..21cee2e3a70 100644
--- a/app/assets/stylesheets/pages/diff.scss
+++ b/app/assets/stylesheets/pages/diff.scss
@@ -164,7 +164,10 @@
       line-height: 0;
       img {
         border: 1px solid #fff;
-        background: image-url('trans_bg.gif');
+        background-image: linear-gradient(45deg, #e5e5e5 25%, transparent 25%, transparent 75%, #e5e5e5 75%, #e5e5e5 100%),
+        linear-gradient(45deg, #e5e5e5 25%, transparent 25%, transparent 75%, #e5e5e5 75%, #e5e5e5 100%);
+        background-size: 10px 10px;
+        background-position: 0 0, 5px 5px;
         max-width: 100%;
       }
       &.deleted {
diff --git a/app/assets/stylesheets/pages/pipelines.scss b/app/assets/stylesheets/pages/pipelines.scss
index c58e2ffe7f5..21919fe4d73 100644
--- a/app/assets/stylesheets/pages/pipelines.scss
+++ b/app/assets/stylesheets/pages/pipelines.scss
@@ -18,6 +18,10 @@
   .btn {
     margin: 4px;
   }
+
+  .table.builds {
+    min-width: 1200px;
+  }
 }
 
 .content-list {
@@ -35,7 +39,7 @@
 }
 
 .table.builds {
-  min-width: 1200px;
+  min-width: 900px;
 
   &.pipeline {
     min-width: 650px;
@@ -128,7 +132,7 @@
   .icon-container {
     display: inline-block;
     text-align: right;
-    width: 20px;
+    width: 15px;
 
     .fa {
       position: relative;
diff --git a/app/assets/stylesheets/pages/projects.scss b/app/assets/stylesheets/pages/projects.scss
index cc3aef5199e..4409477916f 100644
--- a/app/assets/stylesheets/pages/projects.scss
+++ b/app/assets/stylesheets/pages/projects.scss
@@ -661,14 +661,28 @@ pre.light-well {
   }
 }
 
+.new_protected_branch {
+  .dropdown {
+    display: inline;
+    margin-left: 15px;
+  }
+
+  label {
+    min-width: 120px;
+  }
+}
+
 .protected-branches-list {
   a {
     color: $gl-gray;
-    font-weight: 600;
 
     &:hover {
       color: $gl-link-color;
     }
+
+    &.is-active {
+      font-weight: 600;
+    }
   }
 }
 
diff --git a/app/assets/stylesheets/pages/tree.scss b/app/assets/stylesheets/pages/tree.scss
index 390977297fb..9da40fe2b09 100644
--- a/app/assets/stylesheets/pages/tree.scss
+++ b/app/assets/stylesheets/pages/tree.scss
@@ -58,6 +58,10 @@
 
     .tree_commit {
       max-width: 320px;
+
+      .str-truncated {
+        max-width: 100%;
+      }
     }
 
     .tree_time_ago {
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index a1004d9bcea..634d36a4467 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -243,42 +243,6 @@ class ApplicationController < ActionController::Base
     end
   end
 
-  def set_filters_params
-    set_default_sort
-
-    params[:scope] = 'all' if params[:scope].blank?
-    params[:state] = 'opened' if params[:state].blank?
-
-    @sort = params[:sort]
-    @filter_params = params.dup
-
-    if @project
-      @filter_params[:project_id] = @project.id
-    elsif @group
-      @filter_params[:group_id] = @group.id
-    else
-      # TODO: this filter ignore issues/mr created in public or
-      # internal repos where you are not a member. Enable this filter
-      # or improve current implementation to filter only issues you
-      # created or assigned or mentioned
-      # @filter_params[:authorized_only] = true
-    end
-
-    @filter_params
-  end
-
-  def get_issues_collection
-    set_filters_params
-    @issuable_finder = IssuesFinder.new(current_user, @filter_params)
-    @issuable_finder.execute
-  end
-
-  def get_merge_requests_collection
-    set_filters_params
-    @issuable_finder = MergeRequestsFinder.new(current_user, @filter_params)
-    @issuable_finder.execute
-  end
-
   def import_sources_enabled?
     !current_application_settings.import_sources.empty?
   end
@@ -363,24 +327,4 @@ class ApplicationController < ActionController::Base
   def u2f_app_id
     request.base_url
   end
-
-  private
-
-  def set_default_sort
-    key = if is_a_listing_page_for?('issues') || is_a_listing_page_for?('merge_requests')
-            'issuable_sort'
-          end
-
-    cookies[key]  = params[:sort] if key && params[:sort].present?
-    params[:sort] = cookies[key] if key
-    params[:sort] ||= 'id_desc'
-  end
-
-  def is_a_listing_page_for?(page_type)
-    controller_name, action_name = params.values_at(:controller, :action)
-
-    (controller_name == "projects/#{page_type}" && action_name == 'index') ||
-    (controller_name == 'groups' && action_name == page_type) ||
-    (controller_name == 'dashboard' && action_name == page_type)
-  end
 end
diff --git a/app/controllers/concerns/diff_for_path.rb b/app/controllers/concerns/diff_for_path.rb
index 026d8b2e1e0..aeec3009f15 100644
--- a/app/controllers/concerns/diff_for_path.rb
+++ b/app/controllers/concerns/diff_for_path.rb
@@ -1,8 +1,8 @@
 module DiffForPath
   extend ActiveSupport::Concern
 
-  def render_diff_for_path(diffs, diff_refs, project)
-    diff_file = safe_diff_files(diffs, diff_refs: diff_refs, repository: project.repository).find do |diff|
+  def render_diff_for_path(diffs)
+    diff_file = diffs.diff_files.find do |diff|
       diff.old_path == params[:old_path] && diff.new_path == params[:new_path]
     end
 
@@ -14,7 +14,7 @@ module DiffForPath
     locals = {
       diff_file: diff_file,
       diff_commit: diff_commit,
-      diff_refs: diff_refs,
+      diff_refs: diffs.diff_refs,
       blob: blob,
       project: project
     }
diff --git a/app/controllers/concerns/issuable_collections.rb b/app/controllers/concerns/issuable_collections.rb
new file mode 100644
index 00000000000..c802922e0af
--- /dev/null
+++ b/app/controllers/concerns/issuable_collections.rb
@@ -0,0 +1,79 @@
+module IssuableCollections
+  extend ActiveSupport::Concern
+  include SortingHelper
+
+  included do
+    helper_method :issues_finder
+    helper_method :merge_requests_finder
+  end
+
+  private
+
+  def issues_collection
+    issues_finder.execute
+  end
+
+  def merge_requests_collection
+    merge_requests_finder.execute
+  end
+
+  def issues_finder
+    @issues_finder ||= issuable_finder_for(IssuesFinder)
+  end
+
+  def merge_requests_finder
+    @merge_requests_finder ||= issuable_finder_for(MergeRequestsFinder)
+  end
+
+  def issuable_finder_for(finder_class)
+    finder_class.new(current_user, filter_params)
+  end
+
+  def filter_params
+    set_sort_order_from_cookie
+    set_default_scope
+    set_default_state
+
+    @filter_params = params.dup
+    @filter_params[:sort] ||= default_sort_order
+
+    @sort = @filter_params[:sort]
+
+    if @project
+      @filter_params[:project_id] = @project.id
+    elsif @group
+      @filter_params[:group_id] = @group.id
+    else
+      # TODO: this filter ignore issues/mr created in public or
+      # internal repos where you are not a member. Enable this filter
+      # or improve current implementation to filter only issues you
+      # created or assigned or mentioned
+      # @filter_params[:authorized_only] = true
+    end
+
+    @filter_params
+  end
+
+  def set_default_scope
+    params[:scope] = 'all' if params[:scope].blank?
+  end
+
+  def set_default_state
+    params[:state] = 'opened' if params[:state].blank?
+  end
+
+  def set_sort_order_from_cookie
+    key = 'issuable_sort'
+
+    cookies[key] = params[:sort] if params[:sort].present?
+    params[:sort] = cookies[key]
+  end
+
+  def default_sort_order
+    case params[:state]
+    when 'opened', 'all' then sort_value_recently_created
+    when 'merged', 'closed' then sort_value_recently_updated
+    else sort_value_recently_created
+    end
+  end
+end
diff --git a/app/controllers/concerns/issues_action.rb b/app/controllers/concerns/issues_action.rb
index 4feabc32b1c..b89fb94be6e 100644
--- a/app/controllers/concerns/issues_action.rb
+++ b/app/controllers/concerns/issues_action.rb
@@ -1,12 +1,14 @@
 module IssuesAction
   extend ActiveSupport::Concern
+  include IssuableCollections
 
   def issues
-    @issues = get_issues_collection.non_archived
-    @issues = @issues.page(params[:page])
-    @issues = @issues.preload(:author, :project)
+    @label = issues_finder.labels.first
 
-    @label = @issuable_finder.labels.first
+    @issues = issues_collection
+              .non_archived
+              .preload(:author, :project)
+              .page(params[:page])
 
     respond_to do |format|
       format.html
diff --git a/app/controllers/concerns/merge_requests_action.rb b/app/controllers/concerns/merge_requests_action.rb
index 06a6b065e7e..a1b0eee37f9 100644
--- a/app/controllers/concerns/merge_requests_action.rb
+++ b/app/controllers/concerns/merge_requests_action.rb
@@ -1,11 +1,13 @@
 module MergeRequestsAction
   extend ActiveSupport::Concern
+  include IssuableCollections
 
   def merge_requests
-    @merge_requests = get_merge_requests_collection.non_archived
-    @merge_requests = @merge_requests.page(params[:page])
-    @merge_requests = @merge_requests.preload(:author, :target_project)
+    @label = merge_requests_finder.labels.first
 
-    @label = @issuable_finder.labels.first
+    @merge_requests = merge_requests_collection
+                      .non_archived
+                      .preload(:author, :target_project)
+                      .page(params[:page])
   end
 end
diff --git a/app/controllers/import/bitbucket_controller.rb b/app/controllers/import/bitbucket_controller.rb
index 25e58724860..944c73d139a 100644
--- a/app/controllers/import/bitbucket_controller.rb
+++ b/app/controllers/import/bitbucket_controller.rb
@@ -82,8 +82,6 @@ class Import::BitbucketController < Import::BaseController
     go_to_bitbucket_for_permissions
   end
 
-  private
-
   def access_params
     {
       bitbucket_access_token: session[:bitbucket_access_token],
diff --git a/app/controllers/import/gitlab_controller.rb b/app/controllers/import/gitlab_controller.rb
index 23a396e8084..08130ee8176 100644
--- a/app/controllers/import/gitlab_controller.rb
+++ b/app/controllers/import/gitlab_controller.rb
@@ -61,8 +61,6 @@ class Import::GitlabController < Import::BaseController
     go_to_gitlab_for_permissions
   end
 
-  private
-
   def access_params
     { gitlab_access_token: session[:gitlab_access_token] }
   end
diff --git a/app/controllers/projects/commit_controller.rb b/app/controllers/projects/commit_controller.rb
index 7ae034f9398..fdfe7c65b7b 100644
--- a/app/controllers/projects/commit_controller.rb
+++ b/app/controllers/projects/commit_controller.rb
@@ -28,7 +28,7 @@ class Projects::CommitController < Projects::ApplicationController
   end
 
   def diff_for_path
-    render_diff_for_path(@diffs, @commit.diff_refs, @project)
+    render_diff_for_path(@commit.diffs(diff_options))
   end
 
   def builds
diff --git a/app/controllers/projects/compare_controller.rb b/app/controllers/projects/compare_controller.rb
index 8c004724f02..bee3d56076c 100644
--- a/app/controllers/projects/compare_controller.rb
+++ b/app/controllers/projects/compare_controller.rb
@@ -21,7 +21,7 @@ class Projects::CompareController < Projects::ApplicationController
   def diff_for_path
     return render_404 unless @compare
 
-    render_diff_for_path(@diffs, @diff_refs, @project)
+    render_diff_for_path(@compare.diffs(diff_options))
   end
 
   def create
@@ -40,18 +40,12 @@ class Projects::CompareController < Projects::ApplicationController
     @compare = CompareService.new.execute(@project, @head_ref, @project, @start_ref)
 
     if @compare
-      @commits = Commit.decorate(@compare.commits, @project)
-
-      @start_commit = @project.commit(@start_ref)
-      @commit = @project.commit(@head_ref)
-      @base_commit = @project.merge_base_commit(@start_ref, @head_ref)
+      @commits = @compare.commits
+      @start_commit = @compare.start_commit
+      @commit = @compare.commit
+      @base_commit = @compare.base_commit
 
       @diffs = @compare.diffs(diff_options)
-      @diff_refs = Gitlab::Diff::DiffRefs.new(
-        base_sha: @base_commit.try(:sha),
-        start_sha: @start_commit.try(:sha),
-        head_sha: @commit.try(:sha)
-      )
 
       @diff_notes_disabled = true
       @grouped_diff_discussions = {}
diff --git a/app/controllers/projects/environments_controller.rb b/app/controllers/projects/environments_controller.rb
index 4b433796161..58678f96879 100644
--- a/app/controllers/projects/environments_controller.rb
+++ b/app/controllers/projects/environments_controller.rb
@@ -2,8 +2,8 @@ class Projects::EnvironmentsController < Projects::ApplicationController
   layout 'project'
   before_action :authorize_read_environment!
   before_action :authorize_create_environment!, only: [:new, :create]
-  before_action :authorize_update_environment!, only: [:destroy]
-  before_action :environment, only: [:show, :destroy]
+  before_action :authorize_update_environment!, only: [:edit, :update, :destroy]
+  before_action :environment, only: [:show, :edit, :update, :destroy]
 
   def index
     @environments = project.environments
@@ -17,13 +17,24 @@ class Projects::EnvironmentsController < Projects::ApplicationController
     @environment = project.environments.new
   end
 
+  def edit
+  end
+
   def create
-    @environment = project.environments.create(create_params)
+    @environment = project.environments.create(environment_params)
 
     if @environment.persisted?
       redirect_to namespace_project_environment_path(project.namespace, project, @environment)
     else
-      render 'new'
+      render :new
+    end
+  end
+
+  def update
+    if @environment.update(environment_params)
+      redirect_to namespace_project_environment_path(project.namespace, project, @environment)
+    else
+      render :edit
     end
   end
 
@@ -39,8 +50,8 @@ class Projects::EnvironmentsController < Projects::ApplicationController
 
   private
 
-  def create_params
-    params.require(:environment).permit(:name)
+  def environment_params
+    params.require(:environment).permit(:name, :external_url)
   end
 
   def environment
diff --git a/app/controllers/projects/issues_controller.rb b/app/controllers/projects/issues_controller.rb
index 3c6f29ac0ba..660e0eba06f 100644
--- a/app/controllers/projects/issues_controller.rb
+++ b/app/controllers/projects/issues_controller.rb
@@ -3,7 +3,9 @@ class Projects::IssuesController < Projects::ApplicationController
   include ToggleSubscriptionAction
   include IssuableActions
   include ToggleAwardEmoji
+  include IssuableCollections
 
+  before_action :redirect_to_external_issue_tracker, only: [:index, :new]
   before_action :module_enabled
   before_action :issue, only: [:edit, :update, :show, :referenced_merge_requests,
                                :related_branches, :can_create_branch]
@@ -24,7 +26,7 @@ class Projects::IssuesController < Projects::ApplicationController
 
   def index
     terms = params['issue_search']
-    @issues = get_issues_collection
+    @issues = issues_collection
 
     if terms.present?
       if terms =~ /\A#(\d+)\z/
@@ -200,6 +202,18 @@ class Projects::IssuesController < Projects::ApplicationController
     return render_404 unless @project.issues_enabled && @project.default_issues_tracker?
   end
 
+  def redirect_to_external_issue_tracker
+    external = @project.external_issue_tracker
+
+    return unless external
+
+    if action_name == 'new'
+      redirect_to external.new_issue_path
+    else
+      redirect_to external.issues_url
+    end
+  end
+
   # Since iids are implemented only in 6.1
   # user may navigate to issue page using old global ids.
   #
diff --git a/app/controllers/projects/merge_requests_controller.rb b/app/controllers/projects/merge_requests_controller.rb
index b162384d44d..596796fd300 100644
--- a/app/controllers/projects/merge_requests_controller.rb
+++ b/app/controllers/projects/merge_requests_controller.rb
@@ -5,6 +5,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
   include IssuableActions
   include NotesHelper
   include ToggleAwardEmoji
+  include IssuableCollections
 
   before_action :module_enabled
   before_action :merge_request, only: [
@@ -29,7 +30,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
   def index
     terms = params['issue_search']
-    @merge_requests = get_merge_requests_collection
+    @merge_requests = merge_requests_collection
 
     if terms.present?
       if terms =~ /\A[#!](\d+)\z/
@@ -84,7 +85,11 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
     respond_to do |format|
       format.html { define_discussion_vars }
-      format.json { render json: { html: view_to_html_string("projects/merge_requests/show/_diffs") } }
+      format.json do
+        @diffs = @merge_request.diffs(diff_options)
+
+        render json: { html: view_to_html_string("projects/merge_requests/show/_diffs") }
+      end
     end
   end
 
@@ -102,9 +107,8 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     end
 
     define_commit_vars
-    diffs = @merge_request.diffs(diff_options)
 
-    render_diff_for_path(diffs, @merge_request.diff_refs, @merge_request.project)
+    render_diff_for_path(@merge_request.diffs(diff_options))
   end
 
   def commits
@@ -152,7 +156,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     @commits = @merge_request.compare_commits.reverse
     @commit = @merge_request.diff_head_commit
     @base_commit = @merge_request.diff_base_commit
-    @diffs = @merge_request.compare.diffs(diff_options) if @merge_request.compare
+    @diffs = @merge_request.diffs(diff_options) if @merge_request.compare
     @diff_notes_disabled = true
 
     @pipeline = @merge_request.pipeline
@@ -374,6 +378,8 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
     @discussions = @merge_request.discussions
 
+    preload_noteable_for_regular_notes(@discussions.flat_map(&:notes))
+
     # This is not executed lazily
     @notes = Banzai::NoteRenderer.render(
       @discussions.flat_map(&:notes),
diff --git a/app/controllers/projects/protected_branches_controller.rb b/app/controllers/projects/protected_branches_controller.rb
index 10dca47fded..d28ec6e2eac 100644
--- a/app/controllers/projects/protected_branches_controller.rb
+++ b/app/controllers/projects/protected_branches_controller.rb
@@ -3,19 +3,24 @@ class Projects::ProtectedBranchesController < Projects::ApplicationController
   before_action :require_non_empty_project
   before_action :authorize_admin_project!
   before_action :load_protected_branch, only: [:show, :update, :destroy]
+  before_action :load_protected_branches, only: [:index]
 
   layout "project_settings"
 
   def index
-    @protected_branches = @project.protected_branches.order(:name).page(params[:page])
     @protected_branch = @project.protected_branches.new
-    gon.push({ open_branches: @project.open_branches.map { |br| { text: br.name, id: br.name, title: br.name } } })
+    load_protected_branches_gon_variables
   end
 
   def create
-    @project.protected_branches.create(protected_branch_params)
-    redirect_to namespace_project_protected_branches_path(@project.namespace,
-                                                          @project)
+    @protected_branch = ProtectedBranches::CreateService.new(@project, current_user, protected_branch_params).execute
+    if @protected_branch.persisted?
+      redirect_to namespace_project_protected_branches_path(@project.namespace, @project)
+    else
+      load_protected_branches
+      load_protected_branches_gon_variables
+      render :index
+    end
   end
 
   def show
@@ -23,7 +28,9 @@ class Projects::ProtectedBranchesController < Projects::ApplicationController
   end
 
   def update
-    if @protected_branch && @protected_branch.update_attributes(protected_branch_params)
+    @protected_branch = ProtectedBranches::UpdateService.new(@project, current_user, protected_branch_params).execute(@protected_branch)
+
+    if @protected_branch.valid?
       respond_to do |format|
         format.json { render json: @protected_branch, status: :ok }
       end
@@ -50,6 +57,18 @@ class Projects::ProtectedBranchesController < Projects::ApplicationController
   end
 
   def protected_branch_params
-    params.require(:protected_branch).permit(:name, :developers_can_push, :developers_can_merge)
+    params.require(:protected_branch).permit(:name,
+                                             merge_access_level_attributes: [:access_level],
+                                             push_access_level_attributes: [:access_level])
+  end
+
+  def load_protected_branches
+    @protected_branches = @project.protected_branches.order(:name).page(params[:page])
+  end
+
+  def load_protected_branches_gon_variables
+    gon.push({ open_branches: @project.open_branches.map { |br| { text: br.name, id: br.name, title: br.name } },
+               push_access_levels: ProtectedBranch::PushAccessLevel.human_access_levels.map { |id, text| { id: id, text: text } },
+               merge_access_levels: ProtectedBranch::MergeAccessLevel.human_access_levels.map { |id, text| { id: id, text: text } } })
   end
 end
diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
index ec7a2e63b9a..a6e1aa5ccc1 100644
--- a/app/controllers/projects_controller.rb
+++ b/app/controllers/projects_controller.rb
@@ -97,7 +97,7 @@ class ProjectsController < Projects::ApplicationController
     end
 
     if @project.pending_delete?
-      flash[:alert] = "Project queued for delete."
+      flash[:alert] = "Project #{@project.name} queued for deletion."
     end
 
     respond_to do |format|
diff --git a/app/finders/issuable_finder.rb b/app/finders/issuable_finder.rb
index a0932712bd0..33daac0399e 100644
--- a/app/finders/issuable_finder.rb
+++ b/app/finders/issuable_finder.rb
@@ -109,7 +109,7 @@ class IssuableFinder
 
         scope.where(title: params[:milestone_title])
       else
-        nil
+        Milestone.none
       end
   end
 
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 03495cf5ec4..50de93d4bdf 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -245,7 +245,6 @@ module ApplicationHelper
       milestone_title: params[:milestone_title],
       assignee_id: params[:assignee_id],
       author_id: params[:author_id],
-      sort: params[:sort],
       issue_search: params[:issue_search],
       label_name: params[:label_name]
     }
diff --git a/app/helpers/blob_helper.rb b/app/helpers/blob_helper.rb
index abe115d8c68..48c27828219 100644
--- a/app/helpers/blob_helper.rb
+++ b/app/helpers/blob_helper.rb
@@ -13,7 +13,7 @@ module BlobHelper
 
     blob = project.repository.blob_at(ref, path) rescue nil
 
-    return unless blob && blob_text_viewable?(blob)
+    return unless blob
 
     from_mr = options[:from_merge_request_id]
     link_opts = {}
diff --git a/app/helpers/commits_helper.rb b/app/helpers/commits_helper.rb
index f497626e21a..7a02d0b10d9 100644
--- a/app/helpers/commits_helper.rb
+++ b/app/helpers/commits_helper.rb
@@ -206,10 +206,10 @@ module CommitsHelper
     end
   end
 
-  def view_file_btn(commit_sha, diff, project)
+  def view_file_btn(commit_sha, diff_new_path, project)
     link_to(
       namespace_project_blob_path(project.namespace, project,
-                                  tree_join(commit_sha, diff.new_path)),
+                                  tree_join(commit_sha, diff_new_path)),
       class: 'btn view-file js-view-file btn-file-option'
     ) do
       raw('View file @') + content_tag(:span, commit_sha[0..6],
diff --git a/app/helpers/diff_helper.rb b/app/helpers/diff_helper.rb
index 4c031942793..cc7121b1163 100644
--- a/app/helpers/diff_helper.rb
+++ b/app/helpers/diff_helper.rb
@@ -30,11 +30,7 @@ module DiffHelper
       options[:paths] = params.values_at(:old_path, :new_path)
     end
 
-    Commit.max_diff_options.merge(options)
-  end
-
-  def safe_diff_files(diffs, diff_refs: nil, repository: nil)
-    diffs.decorate! { |diff| Gitlab::Diff::File.new(diff, diff_refs: diff_refs, repository: repository) }
+    options
   end
 
   def unfold_bottom_class(bottom)
@@ -144,8 +140,6 @@ module DiffHelper
     toggle_whitespace_link(url, options)
   end
 
-  private
-
   def hide_whitespace?
     params[:w] == '1'
   end
diff --git a/app/helpers/issues_helper.rb b/app/helpers/issues_helper.rb
index 2b0defd1dda..2e82b44437b 100644
--- a/app/helpers/issues_helper.rb
+++ b/app/helpers/issues_helper.rb
@@ -13,38 +13,6 @@ module IssuesHelper
     OpenStruct.new(id: 0, title: 'None (backlog)', name: 'Unassigned')
   end
 
-  def url_for_project_issues(project = @project, options = {})
-    return '' if project.nil?
-
-    url =
-      if options[:only_path]
-        project.issues_tracker.project_path
-      else
-        project.issues_tracker.project_url
-      end
-
-    # Ensure we return a valid URL to prevent possible XSS.
-    URI.parse(url).to_s
-  rescue URI::InvalidURIError
-    ''
-  end
-
-  def url_for_new_issue(project = @project, options = {})
-    return '' if project.nil?
-
-    url =
-      if options[:only_path]
-        project.issues_tracker.new_issue_path
-      else
-        project.issues_tracker.new_issue_url
-      end
-
-    # Ensure we return a valid URL to prevent possible XSS.
-    URI.parse(url).to_s
-  rescue URI::InvalidURIError
-    ''
-  end
-
   def url_for_issue(issue_iid, project = @project, options = {})
     return '' if project.nil?
 
diff --git a/app/helpers/notes_helper.rb b/app/helpers/notes_helper.rb
index 3761855efc7..0bff88f1dd2 100644
--- a/app/helpers/notes_helper.rb
+++ b/app/helpers/notes_helper.rb
@@ -90,6 +90,10 @@ module NotesHelper
     project.team.max_member_access_for_user_ids(user_ids)
   end
 
+  def preload_noteable_for_regular_notes(notes)
+    ActiveRecord::Associations::Preloader.new.preload(notes.select { |note| !note.for_commit? }, :noteable)
+  end
+
   def note_max_access_for_user(note)
     note.project.team.human_max_access(note.author_id)
   end
diff --git a/app/helpers/projects_helper.rb b/app/helpers/projects_helper.rb
index a733dff1579..505545fbabb 100644
--- a/app/helpers/projects_helper.rb
+++ b/app/helpers/projects_helper.rb
@@ -263,6 +263,10 @@ module ProjectsHelper
     filename_path(project, :version)
   end
 
+  def ci_configuration_path(project)
+    filename_path(project, :gitlab_ci_yml)
+  end
+
   def project_wiki_path_with_version(proj, page, version, is_newest)
     url_params = is_newest ? {} : { version_id: version }
     namespace_project_wiki_path(proj.namespace, proj, page, url_params)
diff --git a/app/helpers/sorting_helper.rb b/app/helpers/sorting_helper.rb
index d86f1999f5c..e1c0b497550 100644
--- a/app/helpers/sorting_helper.rb
+++ b/app/helpers/sorting_helper.rb
@@ -102,11 +102,11 @@ module SortingHelper
   end
 
   def sort_value_oldest_created
-    'id_asc'
+    'created_asc'
   end
 
   def sort_value_recently_created
-    'id_desc'
+    'created_desc'
   end
 
   def sort_value_milestone_soon
diff --git a/app/models/ability.rb b/app/models/ability.rb
index 5075076c27b..c9d4c4dd03b 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -47,6 +47,16 @@ class Ability
       end
     end
 
+    # Returns an Array of Issues that can be read by the given user.
+    #
+    # issues - The issues to reduce down to those readable by the user.
+    # user - The User for which to check the issues
+    def issues_readable_by_user(issues, user = nil)
+      return issues if user && user.admin?
+
+      issues.select { |issue| issue.visible_to_user?(user) }
+    end
+
     # List of possible abilities for anonymous user
     def anonymous_abilities(user, subject)
       if subject.is_a?(PersonalSnippet)
diff --git a/app/models/ci/build.rb b/app/models/ci/build.rb
index aac78d75f57..08f396210c9 100644
--- a/app/models/ci/build.rb
+++ b/app/models/ci/build.rb
@@ -13,6 +13,7 @@ module Ci
     scope :unstarted, ->() { where(runner_id: nil) }
     scope :ignore_failures, ->() { where(allow_failure: false) }
     scope :with_artifacts, ->() { where.not(artifacts_file: [nil, '']) }
+    scope :with_artifacts_not_expired, ->() { with_artifacts.where('artifacts_expire_at IS NULL OR artifacts_expire_at > ?', Time.now) }
     scope :with_expired_artifacts, ->() { with_artifacts.where('artifacts_expire_at < ?', Time.now) }
     scope :last_month, ->() { where('created_at > ?', Date.today - 1.month) }
     scope :manual_actions, ->() { where(when: :manual) }
diff --git a/app/models/commit.rb b/app/models/commit.rb
index f80f1063406..cc413448ce8 100644
--- a/app/models/commit.rb
+++ b/app/models/commit.rb
@@ -104,7 +104,7 @@ class Commit
   end
 
   def diff_line_count
-    @diff_line_count ||= Commit::diff_line_count(self.diffs)
+    @diff_line_count ||= Commit::diff_line_count(raw_diffs)
     @diff_line_count
   end
 
@@ -123,15 +123,17 @@ class Commit
   # In case this first line is longer than 100 characters, it is cut off
   # after 80 characters and ellipses (`&hellp;`) are appended.
   def title
-    title = safe_message
+    full_title.length > 100 ? full_title[0..79] << "…" : full_title
+  end
 
-    return no_commit_message if title.blank?
+  # Returns the full commits title
+  def full_title
+    return @full_title if @full_title
 
-    title_end = title.index("\n")
-    if (!title_end && title.length > 100) || (title_end && title_end > 100)
-      title[0..79] << "…"
+    if safe_message.blank?
+      @full_title = no_commit_message
     else
-      title.split("\n", 2).first
+      @full_title = safe_message.split("\n", 2).first
     end
   end
 
@@ -178,7 +180,18 @@ class Commit
   end
 
   def author
-    @author ||= User.find_by_any_email(author_email.downcase)
+    if RequestStore.active?
+      key = "commit_author:#{author_email.downcase}"
+      # nil is a valid value since no author may exist in the system
+      if RequestStore.store.has_key?(key)
+        @author = RequestStore.store[key]
+      else
+        @author = find_author_by_any_email
+        RequestStore.store[key] = @author
+      end
+    else
+      @author ||= find_author_by_any_email
+    end
   end
 
   def committer
@@ -304,12 +317,24 @@ class Commit
     nil
   end
 
+  def raw_diffs(*args)
+    raw.diffs(*args)
+  end
+
+  def diffs(diff_options = nil)
+    Gitlab::Diff::FileCollection::Commit.new(self, diff_options: diff_options)
+  end
+
   private
 
+  def find_author_by_any_email
+    User.find_by_any_email(author_email.downcase)
+  end
+
   def repo_changes
     changes = { added: [], modified: [], removed: [] }
 
-    diffs.each do |diff|
+    raw_diffs(deltas_only: true).each do |diff|
       if diff.deleted_file
         changes[:removed] << diff.old_path
       elsif diff.renamed_file || diff.new_file
diff --git a/app/models/compare.rb b/app/models/compare.rb
new file mode 100644
index 00000000000..4856510f526
--- /dev/null
+++ b/app/models/compare.rb
@@ -0,0 +1,66 @@
+class Compare
+  delegate :same, :head, :base, to: :@compare
+
+  attr_reader :project
+
+  def self.decorate(compare, project)
+    if compare.is_a?(Compare)
+      compare
+    else
+      self.new(compare, project)
+    end
+  end
+
+  def initialize(compare, project)
+    @compare = compare
+    @project = project
+  end
+
+  def commits
+    @commits ||= Commit.decorate(@compare.commits, project)
+  end
+
+  def start_commit
+    return @start_commit if defined?(@start_commit)
+
+    commit = @compare.base
+    @start_commit = commit ? ::Commit.new(commit, project) : nil
+  end
+
+  def head_commit
+    return @head_commit if defined?(@head_commit)
+
+    commit = @compare.head
+    @head_commit = commit ? ::Commit.new(commit, project) : nil
+  end
+  alias_method :commit, :head_commit
+
+  def base_commit
+    return @base_commit if defined?(@base_commit)
+
+    @base_commit = if start_commit && head_commit
+                     project.merge_base_commit(start_commit.id, head_commit.id)
+                   else
+                     nil
+                   end
+  end
+
+  def raw_diffs(*args)
+    @compare.diffs(*args)
+  end
+
+  def diffs(diff_options = nil)
+    Gitlab::Diff::FileCollection::Compare.new(self,
+      project: project,
+      diff_options: diff_options,
+      diff_refs: diff_refs)
+  end
+
+  def diff_refs
+    Gitlab::Diff::DiffRefs.new(
+      base_sha:  base_commit.try(:sha),
+      start_sha: start_commit.try(:sha),
+      head_sha: commit.try(:sha)
+    )
+  end
+end
diff --git a/app/models/concerns/token_authenticatable.rb b/app/models/concerns/token_authenticatable.rb
index 885deaf78d2..24c7b26d223 100644
--- a/app/models/concerns/token_authenticatable.rb
+++ b/app/models/concerns/token_authenticatable.rb
@@ -1,12 +1,26 @@
 module TokenAuthenticatable
   extend ActiveSupport::Concern
 
+  private
+
+  def write_new_token(token_field)
+    new_token = generate_token(token_field)
+    write_attribute(token_field, new_token)
+  end
+
+  def generate_token(token_field)
+    loop do
+      token = Devise.friendly_token
+      break token unless self.class.unscoped.find_by(token_field => token)
+    end
+  end
+
   class_methods do
     def authentication_token_fields
       @token_fields || []
     end
 
-    private
+    private # rubocop:disable Lint/UselessAccessModifier
 
     def add_authentication_token_field(token_field)
       @token_fields = [] unless @token_fields
@@ -32,18 +46,4 @@ module TokenAuthenticatable
       end
     end
   end
-
-  private
-
-  def write_new_token(token_field)
-    new_token = generate_token(token_field)
-    write_attribute(token_field, new_token)
-  end
-
-  def generate_token(token_field)
-    loop do
-      token = Devise.friendly_token
-      break token unless self.class.unscoped.find_by(token_field => token)
-    end
-  end
 end
diff --git a/app/models/diff_note.rb b/app/models/diff_note.rb
index e0c58b74380..c40752b186b 100644
--- a/app/models/diff_note.rb
+++ b/app/models/diff_note.rb
@@ -70,7 +70,7 @@ class DiffNote < Note
     return false unless supported?
     return true if for_commit?
 
-    diff_refs ||= self.noteable.diff_refs
+    diff_refs ||= noteable_diff_refs
 
     self.position.diff_refs == diff_refs
   end
@@ -120,6 +120,14 @@ class DiffNote < Note
     for_commit? || self.noteable.support_new_diff_notes?
   end
 
+  def noteable_diff_refs
+    if noteable.respond_to?(:diff_sha_refs)
+      noteable.diff_sha_refs
+    else
+      noteable.diff_refs
+    end
+  end
+
   def set_original_position
     self.original_position = self.position.dup
   end
@@ -138,7 +146,7 @@ class DiffNote < Note
       self.project,
       nil,
       old_diff_refs: self.position.diff_refs,
-      new_diff_refs: self.noteable.diff_refs,
+      new_diff_refs: noteable_diff_refs,
       paths: self.position.paths
     ).execute(self)
   end
diff --git a/app/models/discussion.rb b/app/models/discussion.rb
index 88de62d19e0..c1fd012a27d 100644
--- a/app/models/discussion.rb
+++ b/app/models/discussion.rb
@@ -67,11 +67,15 @@ class Discussion
   end
 
   def resolvable?
-    diff_discussion? && notes.any?(&:resolvable?)
+    return @resolvable if defined?(@resolvable)
+
+    @resolvable = diff_discussion? && notes.any?(&:resolvable?)
   end
 
   def resolved?
-    resolvable? && notes.none?(&:to_be_resolved?)
+    return @resolved if defined?(@resolved)
+
+    @resolved = resolvable? && notes.none?(&:to_be_resolved?)
   end
 
   def resolved_notes
@@ -79,7 +83,9 @@ class Discussion
   end
 
   def to_be_resolved?
-    notes.any?(&:to_be_resolved?)
+    return @to_be_resolved if defined?(@to_be_resolved)
+
+    @to_be_resolved = notes.any?(&:to_be_resolved?)
   end
 
   def can_resolve?(current_user)
@@ -106,6 +112,12 @@ class Discussion
     self.noteable == target && !diff_discussion?
   end
 
+  def active?
+    return @active if defined?(@active)
+
+    @active = first_note.active?
+  end
+
   def collapsed?
     return false unless diff_discussion?
 
diff --git a/app/models/environment.rb b/app/models/environment.rb
index ac3a571a1f3..baed106e8c8 100644
--- a/app/models/environment.rb
+++ b/app/models/environment.rb
@@ -3,6 +3,8 @@ class Environment < ActiveRecord::Base
 
   has_many :deployments
 
+  before_validation :nullify_external_url
+
   validates :name,
             presence: true,
             uniqueness: { scope: :project_id },
@@ -10,7 +12,17 @@ class Environment < ActiveRecord::Base
             format: { with: Gitlab::Regex.environment_name_regex,
                       message: Gitlab::Regex.environment_name_regex_message }
 
+  validates :external_url,
+            uniqueness: { scope: :project_id },
+            length: { maximum: 255 },
+            allow_nil: true,
+            addressable_url: true
+
   def last_deployment
     deployments.last
   end
+
+  def nullify_external_url
+    self.external_url = nil if self.external_url.blank?
+  end
 end
diff --git a/app/models/issue.rb b/app/models/issue.rb
index d9428ebc9fb..11f734cfc6d 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -230,6 +230,34 @@ class Issue < ActiveRecord::Base
       self.closed_by_merge_requests(current_user).empty?
   end
 
+  # Returns `true` if the current issue can be viewed by either a logged in User
+  # or an anonymous user.
+  def visible_to_user?(user = nil)
+    user ? readable_by?(user) : publicly_visible?
+  end
+
+  # Returns `true` if the given User can read the current Issue.
+  def readable_by?(user)
+    if user.admin?
+      true
+    elsif project.owner == user
+      true
+    elsif confidential?
+      author == user ||
+        assignee == user ||
+        project.team.member?(user, Gitlab::Access::REPORTER)
+    else
+      project.public? ||
+        project.internal? && !user.external? ||
+        project.team.member?(user)
+    end
+  end
+
+  # Returns `true` if this Issue is visible to everybody.
+  def publicly_visible?
+    project.public? && !confidential?
+  end
+
   def overdue?
     due_date.try(:past?) || false
   end
diff --git a/app/models/key.rb b/app/models/key.rb
index b9bc38a0436..568a60b8af3 100644
--- a/app/models/key.rb
+++ b/app/models/key.rb
@@ -26,8 +26,9 @@ class Key < ActiveRecord::Base
   end
 
   def publishable_key
-    # Removes anything beyond the keytype and key itself
-    self.key.split[0..1].join(' ')
+    # Strip out the keys comment so we don't leak email addresses
+    # Replace with simple ident of user_name (hostname)
+    self.key.split[0..1].push("#{self.user_name} (#{Gitlab.config.gitlab.host})").join(' ')
   end
 
   # projects that has this key
diff --git a/app/models/label_link.rb b/app/models/label_link.rb
index 47bd6eaf35f..51b5c2b1f4c 100644
--- a/app/models/label_link.rb
+++ b/app/models/label_link.rb
@@ -1,7 +1,9 @@
 class LabelLink < ActiveRecord::Base
+  include Importable
+
   belongs_to :target, polymorphic: true
   belongs_to :label
 
-  validates :target, presence: true
-  validates :label, presence: true
+  validates :target, presence: true, unless: :importing?
+  validates :label, presence: true, unless: :importing?
 end
diff --git a/app/models/legacy_diff_note.rb b/app/models/legacy_diff_note.rb
index bbb9f2346eb..f15553d706e 100644
--- a/app/models/legacy_diff_note.rb
+++ b/app/models/legacy_diff_note.rb
@@ -85,7 +85,7 @@ class LegacyDiffNote < Note
     return nil unless noteable
     return @diff if defined?(@diff)
 
-    @diff = noteable.diffs(Commit.max_diff_options).find do |d|
+    @diff = noteable.raw_diffs(Commit.max_diff_options).find do |d|
       d.new_path && Digest::SHA1.hexdigest(d.new_path) == diff_file_hash
     end
   end
@@ -116,7 +116,7 @@ class LegacyDiffNote < Note
 
   # Find the diff on noteable that matches our own
   def find_noteable_diff
-    diffs = noteable.diffs(Commit.max_diff_options)
+    diffs = noteable.raw_diffs(Commit.max_diff_options)
     diffs.find { |d| d.new_path == self.diff.new_path }
   end
 end
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index a622081e129..1ab644a989a 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -164,8 +164,16 @@ class MergeRequest < ActiveRecord::Base
     merge_request_diff ? merge_request_diff.first_commit : compare_commits.first
   end
 
-  def diffs(*args)
-    merge_request_diff ? merge_request_diff.diffs(*args) : compare.diffs(*args)
+  def raw_diffs(*args)
+    merge_request_diff ? merge_request_diff.raw_diffs(*args) : compare.raw_diffs(*args)
+  end
+
+  def diffs(diff_options = nil)
+    if self.compare
+      self.compare.diffs(diff_options)
+    else
+      Gitlab::Diff::FileCollection::MergeRequest.new(self, diff_options: diff_options)
+    end
   end
 
   def diff_size
@@ -238,11 +246,11 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def target_branch_sha
-    target_branch_head.try(:sha)
+    @target_branch_sha || target_branch_head.try(:sha)
   end
 
   def source_branch_sha
-    source_branch_head.try(:sha)
+    @source_branch_sha || source_branch_head.try(:sha)
   end
 
   def diff_refs
@@ -255,6 +263,19 @@ class MergeRequest < ActiveRecord::Base
     )
   end
 
+  # Return diff_refs instance trying to not touch the git repository
+  def diff_sha_refs
+    if merge_request_diff && merge_request_diff.diff_refs_by_sha?
+      return Gitlab::Diff::DiffRefs.new(
+        base_sha:  merge_request_diff.base_commit_sha,
+        start_sha: merge_request_diff.start_commit_sha,
+        head_sha:  merge_request_diff.head_commit_sha
+      )
+    else
+      diff_refs
+    end
+  end
+
   def validate_branches
     if target_project == source_project && target_branch == source_branch
       errors.add :branch_conflict, "You can not use same project/branch for source and target"
@@ -300,6 +321,8 @@ class MergeRequest < ActiveRecord::Base
 
     merge_request_diff.reload_content
 
+    MergeRequests::MergeRequestDiffCacheService.new.execute(self)
+
     new_diff_refs = self.diff_refs
 
     update_diff_notes_positions(
@@ -674,7 +697,7 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def support_new_diff_notes?
-    diff_refs && diff_refs.complete?
+    diff_sha_refs && diff_sha_refs.complete?
   end
 
   def update_diff_notes_positions(old_diff_refs:, new_diff_refs:)
diff --git a/app/models/merge_request_diff.rb b/app/models/merge_request_diff.rb
index 3f520c8f3ff..fa0efe2d596 100644
--- a/app/models/merge_request_diff.rb
+++ b/app/models/merge_request_diff.rb
@@ -33,12 +33,12 @@ class MergeRequestDiff < ActiveRecord::Base
   end
 
   def size
-    real_size.presence || diffs.size
+    real_size.presence || raw_diffs.size
   end
 
-  def diffs(options={})
+  def raw_diffs(options={})
     if options[:ignore_whitespace_change]
-      @diffs_no_whitespace ||= begin
+      @raw_diffs_no_whitespace ||= begin
         compare = Gitlab::Git::Compare.new(
           repository.raw_repository,
           self.start_commit_sha || self.target_branch_sha,
@@ -47,8 +47,8 @@ class MergeRequestDiff < ActiveRecord::Base
         compare.diffs(options)
       end
     else
-      @diffs ||= {}
-      @diffs[options] ||= load_diffs(st_diffs, options)
+      @raw_diffs ||= {}
+      @raw_diffs[options] ||= load_diffs(st_diffs, options)
     end
   end
 
@@ -82,6 +82,10 @@ class MergeRequestDiff < ActiveRecord::Base
     project.commit(self.head_commit_sha)
   end
 
+  def diff_refs_by_sha?
+    base_commit_sha? && head_commit_sha? && start_commit_sha?
+  end
+
   def compare
     @compare ||=
       begin
diff --git a/app/models/project.rb b/app/models/project.rb
index dc44a757b4b..83b848ded8b 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -874,14 +874,6 @@ class Project < ActiveRecord::Base
     ProtectedBranch.matching(branch_name, protected_branches: @protected_branches).present?
   end
 
-  def developers_can_push_to_protected_branch?(branch_name)
-    protected_branches.matching(branch_name).any?(&:developers_can_push)
-  end
-
-  def developers_can_merge_to_protected_branch?(branch_name)
-    protected_branches.matching(branch_name).any?(&:developers_can_merge)
-  end
-
   def forked?
     !(forked_project_link.nil? || forked_project_link.forked_from_project.nil?)
   end
@@ -1261,6 +1253,16 @@ class Project < ActiveRecord::Base
       authorized_for_user_by_shared_projects?(user, min_access_level)
   end
 
+  def append_or_update_attribute(name, value)
+    old_values = public_send(name.to_s)
+
+    if Project.reflect_on_association(name).try(:macro) == :has_many && old_values.any?
+      update_attribute(name, old_values + value)
+    else
+      update_attribute(name, value)
+    end
+  end
+
   private
 
   def authorized_for_user_by_group?(user, min_access_level)
diff --git a/app/models/project_team.rb b/app/models/project_team.rb
index fdfaf052730..19fd082534c 100644
--- a/app/models/project_team.rb
+++ b/app/models/project_team.rb
@@ -138,8 +138,13 @@ class ProjectTeam
   def max_member_access_for_user_ids(user_ids)
     user_ids = user_ids.uniq
     key = "max_member_access:#{project.id}"
-    RequestStore.store[key] ||= {}
-    access = RequestStore.store[key]
+
+    access = {}
+
+    if RequestStore.active?
+      RequestStore.store[key] ||= {}
+      access = RequestStore.store[key]
+    end
 
     # Lookup only the IDs we need
     user_ids = user_ids - access.keys
diff --git a/app/models/protected_branch.rb b/app/models/protected_branch.rb
index b7011d7afdf..226b3f54342 100644
--- a/app/models/protected_branch.rb
+++ b/app/models/protected_branch.rb
@@ -5,6 +5,12 @@ class ProtectedBranch < ActiveRecord::Base
   validates :name, presence: true
   validates :project, presence: true
 
+  has_one :merge_access_level, dependent: :destroy
+  has_one :push_access_level, dependent: :destroy
+
+  accepts_nested_attributes_for :push_access_level
+  accepts_nested_attributes_for :merge_access_level
+
   def commit
     project.commit(self.name)
   end
diff --git a/app/models/protected_branch/merge_access_level.rb b/app/models/protected_branch/merge_access_level.rb
new file mode 100644
index 00000000000..b1112ee737d
--- /dev/null
+++ b/app/models/protected_branch/merge_access_level.rb
@@ -0,0 +1,24 @@
+class ProtectedBranch::MergeAccessLevel < ActiveRecord::Base
+  belongs_to :protected_branch
+  delegate :project, to: :protected_branch
+
+  validates :access_level, presence: true, inclusion: { in: [Gitlab::Access::MASTER,
+                                                             Gitlab::Access::DEVELOPER] }
+
+  def self.human_access_levels
+    {
+      Gitlab::Access::MASTER => "Masters",
+      Gitlab::Access::DEVELOPER => "Developers + Masters"
+    }.with_indifferent_access
+  end
+
+  def check_access(user)
+    return true if user.is_admin?
+
+    project.team.max_member_access(user.id) >= access_level
+  end
+
+  def humanize
+    self.class.human_access_levels[self.access_level]
+  end
+end
diff --git a/app/models/protected_branch/push_access_level.rb b/app/models/protected_branch/push_access_level.rb
new file mode 100644
index 00000000000..6a5e49cf453
--- /dev/null
+++ b/app/models/protected_branch/push_access_level.rb
@@ -0,0 +1,27 @@
+class ProtectedBranch::PushAccessLevel < ActiveRecord::Base
+  belongs_to :protected_branch
+  delegate :project, to: :protected_branch
+
+  validates :access_level, presence: true, inclusion: { in: [Gitlab::Access::MASTER,
+                                                             Gitlab::Access::DEVELOPER,
+                                                             Gitlab::Access::NO_ACCESS] }
+
+  def self.human_access_levels
+    {
+      Gitlab::Access::MASTER => "Masters",
+      Gitlab::Access::DEVELOPER => "Developers + Masters",
+      Gitlab::Access::NO_ACCESS => "No one"
+    }.with_indifferent_access
+  end
+
+  def check_access(user)
+    return false if access_level == Gitlab::Access::NO_ACCESS
+    return true if user.is_admin?
+
+    project.team.max_member_access(user.id) >= access_level
+  end
+
+  def humanize
+    self.class.human_access_levels[self.access_level]
+  end
+end
diff --git a/app/models/repository.rb b/app/models/repository.rb
index af65e5b20ec..c1170c470ea 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -70,7 +70,12 @@ class Repository
 
   def commit(ref = 'HEAD')
     return nil unless exists?
-    commit = Gitlab::Git::Commit.find(raw_repository, ref)
+    commit =
+      if ref.is_a?(Gitlab::Git::Commit)
+        ref
+      else
+        Gitlab::Git::Commit.find(raw_repository, ref)
+      end
     commit = ::Commit.new(commit, @project) if commit
     commit
   rescue Rugged::OdbError
@@ -158,7 +163,7 @@ class Repository
     before_remove_branch
 
     branch = find_branch(branch_name)
-    oldrev = branch.try(:target)
+    oldrev = branch.try(:target).try(:id)
     newrev = Gitlab::Git::BLANK_SHA
     ref    = Gitlab::Git::BRANCH_REF_PREFIX + branch_name
 
@@ -259,10 +264,10 @@ class Repository
       # Rugged seems to throw a `ReferenceError` when given branch_names rather
       # than SHA-1 hashes
       number_commits_behind = raw_repository.
-        count_commits_between(branch.target, root_ref_hash)
+        count_commits_between(branch.target.sha, root_ref_hash)
 
       number_commits_ahead = raw_repository.
-        count_commits_between(root_ref_hash, branch.target)
+        count_commits_between(root_ref_hash, branch.target.sha)
 
       { behind: number_commits_behind, ahead: number_commits_ahead }
     end
@@ -367,7 +372,7 @@ class Repository
     # We don't want to flush the cache if the commit didn't actually make any
     # changes to any of the possible avatar files.
     if revision && commit = self.commit(revision)
-      return unless commit.diffs.
+      return unless commit.raw_diffs(deltas_only: true).
         any? { |diff| AVATAR_FILES.include?(diff.new_path) }
     end
 
@@ -688,9 +693,7 @@ class Repository
   end
 
   def local_branches
-    @local_branches ||= rugged.branches.each(:local).map do |branch|
-      Gitlab::Git::Branch.new(branch.name, branch.target)
-    end
+    @local_branches ||= raw_repository.local_branches
   end
 
   alias_method :branches, :local_branches
@@ -831,7 +834,7 @@ class Repository
   end
 
   def revert(user, commit, base_branch, revert_tree_id = nil)
-    source_sha = find_branch(base_branch).target
+    source_sha = find_branch(base_branch).target.sha
     revert_tree_id ||= check_revert_content(commit, base_branch)
 
     return false unless revert_tree_id
@@ -848,7 +851,7 @@ class Repository
   end
 
   def cherry_pick(user, commit, base_branch, cherry_pick_tree_id = nil)
-    source_sha = find_branch(base_branch).target
+    source_sha = find_branch(base_branch).target.sha
     cherry_pick_tree_id ||= check_cherry_pick_content(commit, base_branch)
 
     return false unless cherry_pick_tree_id
@@ -869,7 +872,7 @@ class Repository
   end
 
   def check_revert_content(commit, base_branch)
-    source_sha = find_branch(base_branch).target
+    source_sha = find_branch(base_branch).target.sha
     args       = [commit.id, source_sha]
     args << { mainline: 1 } if commit.merge_commit?
 
@@ -883,7 +886,7 @@ class Repository
   end
 
   def check_cherry_pick_content(commit, base_branch)
-    source_sha = find_branch(base_branch).target
+    source_sha = find_branch(base_branch).target.sha
     args       = [commit.id, source_sha]
     args << 1 if commit.merge_commit?
 
@@ -974,7 +977,7 @@ class Repository
     was_empty = empty?
 
     if !was_empty && target_branch
-      oldrev = target_branch.target
+      oldrev = target_branch.target.id
     end
 
     # Make commit
@@ -994,7 +997,7 @@ class Repository
         after_create_branch
       else
         # Update head
-        current_head = find_branch(branch).target
+        current_head = find_branch(branch).target.id
 
         # Make sure target branch was not changed during pre-receive hook
         if current_head == oldrev
@@ -1052,7 +1055,7 @@ class Repository
   end
 
   def tags_sorted_by_committed_date
-    tags.sort_by { |tag| commit(tag.target).committed_date }
+    tags.sort_by { |tag| tag.target.committed_date }
   end
 
   def keep_around_ref_name(sha)
diff --git a/app/services/auth/container_registry_authentication_service.rb b/app/services/auth/container_registry_authentication_service.rb
index e294a962352..6072123b851 100644
--- a/app/services/auth/container_registry_authentication_service.rb
+++ b/app/services/auth/container_registry_authentication_service.rb
@@ -24,10 +24,14 @@ module Auth
       token[:access] = names.map do |name|
         { type: 'repository', name: name, actions: %w(*) }
       end
-      
+
       token.encoded
     end
 
+    def self.token_expire_at
+      Time.now + current_application_settings.container_registry_token_expire_delay.minutes
+    end
+
     private
 
     def authorized_token(*accesses)
@@ -35,7 +39,7 @@ module Auth
       token.issuer = registry.issuer
       token.audience = params[:service]
       token.subject = current_user.try(:username)
-      token.expire_time = ContainerRegistryAuthenticationService.token_expire_at
+      token.expire_time = self.class.token_expire_at
       token[:access] = accesses.compact
       token
     end
@@ -81,9 +85,5 @@ module Auth
     def registry
       Gitlab.config.registry
     end
-
-    def self.token_expire_at
-      Time.now + current_application_settings.container_registry_token_expire_delay.minutes
-    end
   end
 end
diff --git a/app/services/compare_service.rb b/app/services/compare_service.rb
index 149822aa647..6d6075628af 100644
--- a/app/services/compare_service.rb
+++ b/app/services/compare_service.rb
@@ -20,10 +20,12 @@ class CompareService
       )
     end
 
-    Gitlab::Git::Compare.new(
+    raw_compare = Gitlab::Git::Compare.new(
       target_project.repository.raw_repository,
       target_branch,
-      source_sha,
+      source_sha
     )
+
+    Compare.new(raw_compare, target_project)
   end
 end
diff --git a/app/services/delete_branch_service.rb b/app/services/delete_branch_service.rb
index 332c55581a1..87f066edb6f 100644
--- a/app/services/delete_branch_service.rb
+++ b/app/services/delete_branch_service.rb
@@ -40,6 +40,6 @@ class DeleteBranchService < BaseService
 
   def build_push_data(branch)
     Gitlab::PushDataBuilder
-      .build(project, current_user, branch.target, Gitlab::Git::BLANK_SHA, "#{Gitlab::Git::BRANCH_REF_PREFIX}#{branch.name}", [])
+      .build(project, current_user, branch.target.sha, Gitlab::Git::BLANK_SHA, "#{Gitlab::Git::BRANCH_REF_PREFIX}#{branch.name}", [])
   end
 end
diff --git a/app/services/delete_tag_service.rb b/app/services/delete_tag_service.rb
index 1e41fbe34b6..32e0eed6b63 100644
--- a/app/services/delete_tag_service.rb
+++ b/app/services/delete_tag_service.rb
@@ -34,6 +34,6 @@ class DeleteTagService < BaseService
 
   def build_push_data(tag)
     Gitlab::PushDataBuilder
-      .build(project, current_user, tag.target, Gitlab::Git::BLANK_SHA, "#{Gitlab::Git::TAG_REF_PREFIX}#{tag.name}", [])
+      .build(project, current_user, tag.target.sha, Gitlab::Git::BLANK_SHA, "#{Gitlab::Git::TAG_REF_PREFIX}#{tag.name}", [])
   end
 end
diff --git a/app/services/git_push_service.rb b/app/services/git_push_service.rb
index e02b50ff9a2..3f6a177bf3a 100644
--- a/app/services/git_push_service.rb
+++ b/app/services/git_push_service.rb
@@ -88,9 +88,18 @@ class GitPushService < BaseService
 
     # Set protection on the default branch if configured
     if current_application_settings.default_branch_protection != PROTECTION_NONE
-      developers_can_push = current_application_settings.default_branch_protection == PROTECTION_DEV_CAN_PUSH ? true : false
-      developers_can_merge = current_application_settings.default_branch_protection == PROTECTION_DEV_CAN_MERGE ? true : false
-      @project.protected_branches.create({ name: @project.default_branch, developers_can_push: developers_can_push, developers_can_merge: developers_can_merge })
+
+      params = {
+        name: @project.default_branch,
+        push_access_level_attributes: {
+          access_level: current_application_settings.default_branch_protection == PROTECTION_DEV_CAN_PUSH ? Gitlab::Access::DEVELOPER : Gitlab::Access::MASTER
+        },
+        merge_access_level_attributes: {
+          access_level: current_application_settings.default_branch_protection == PROTECTION_DEV_CAN_MERGE ? Gitlab::Access::DEVELOPER : Gitlab::Access::MASTER
+        }
+      }
+
+      ProtectedBranches::CreateService.new(@project, current_user, params).execute
     end
   end
 
diff --git a/app/services/git_tag_push_service.rb b/app/services/git_tag_push_service.rb
index 58573078048..969530c4fdc 100644
--- a/app/services/git_tag_push_service.rb
+++ b/app/services/git_tag_push_service.rb
@@ -26,8 +26,8 @@ class GitTagPushService < BaseService
     unless Gitlab::Git.blank_ref?(params[:newrev])
       tag_name = Gitlab::Git.ref_name(params[:ref])
       tag = project.repository.find_tag(tag_name)
-      
-      if tag && tag.target == params[:newrev]
+
+      if tag && tag.object_sha == params[:newrev]
         commit = project.commit(tag.target)
         commits = [commit].compact
         message = tag.message
diff --git a/app/services/merge_requests/base_service.rb b/app/services/merge_requests/base_service.rb
index bc3606a14c2..ba424b09463 100644
--- a/app/services/merge_requests/base_service.rb
+++ b/app/services/merge_requests/base_service.rb
@@ -17,16 +17,19 @@ module MergeRequests
       end
     end
 
-    def hook_data(merge_request, action)
+    def hook_data(merge_request, action, oldrev = nil)
       hook_data = merge_request.to_hook_data(current_user)
       hook_data[:object_attributes][:url] = Gitlab::UrlBuilder.build(merge_request)
       hook_data[:object_attributes][:action] = action
+      if oldrev && !Gitlab::Git.blank_ref?(oldrev)
+        hook_data[:object_attributes][:oldrev] = oldrev
+      end
       hook_data
     end
 
-    def execute_hooks(merge_request, action = 'open')
+    def execute_hooks(merge_request, action = 'open', oldrev = nil)
       if merge_request.project
-        merge_data = hook_data(merge_request, action)
+        merge_data = hook_data(merge_request, action, oldrev)
         merge_request.project.execute_hooks(merge_data, :merge_request_hooks)
         merge_request.project.execute_services(merge_data, :merge_request_hooks)
       end
diff --git a/app/services/merge_requests/build_service.rb b/app/services/merge_requests/build_service.rb
index 7fe57747265..290742f1506 100644
--- a/app/services/merge_requests/build_service.rb
+++ b/app/services/merge_requests/build_service.rb
@@ -34,7 +34,7 @@ module MergeRequests
       # At this point we decide if merge request can be created
       # If we have at least one commit to merge -> creation allowed
       if commits.present?
-        merge_request.compare_commits = Commit.decorate(commits, merge_request.source_project)
+        merge_request.compare_commits = commits
         merge_request.can_be_created = true
         merge_request.compare = compare
       else
diff --git a/app/services/merge_requests/merge_request_diff_cache_service.rb b/app/services/merge_requests/merge_request_diff_cache_service.rb
new file mode 100644
index 00000000000..2945a7fd4e4
--- /dev/null
+++ b/app/services/merge_requests/merge_request_diff_cache_service.rb
@@ -0,0 +1,8 @@
+module MergeRequests
+  class MergeRequestDiffCacheService
+    def execute(merge_request)
+      # Executing the iteration we cache all the highlighted diff information
+      merge_request.diffs.diff_files.to_a
+    end
+  end
+end
diff --git a/app/services/merge_requests/merge_service.rb b/app/services/merge_requests/merge_service.rb
index 0dac0614141..b037780c431 100644
--- a/app/services/merge_requests/merge_service.rb
+++ b/app/services/merge_requests/merge_service.rb
@@ -35,7 +35,13 @@ module MergeRequests
       }
 
       commit_id = repository.merge(current_user, merge_request, options)
-      merge_request.update(merge_commit_sha: commit_id)
+
+      if commit_id
+        merge_request.update(merge_commit_sha: commit_id)
+      else
+        merge_request.update(merge_error: 'Conflicts detected during merge')
+        false
+      end
     rescue GitHooksService::PreReceiveError => e
       merge_request.update(merge_error: e.message)
       false
diff --git a/app/services/merge_requests/refresh_service.rb b/app/services/merge_requests/refresh_service.rb
index 1daf6bbf553..5cedd6f11d9 100644
--- a/app/services/merge_requests/refresh_service.rb
+++ b/app/services/merge_requests/refresh_service.rb
@@ -137,7 +137,7 @@ module MergeRequests
     # Call merge request webhook with update branches
     def execute_mr_web_hooks
       merge_requests_for_source_branch.each do |merge_request|
-        execute_hooks(merge_request, 'update')
+        execute_hooks(merge_request, 'update', @oldrev)
       end
     end
 
diff --git a/app/services/protected_branches/create_service.rb b/app/services/protected_branches/create_service.rb
new file mode 100644
index 00000000000..6150a2a83c9
--- /dev/null
+++ b/app/services/protected_branches/create_service.rb
@@ -0,0 +1,27 @@
+module ProtectedBranches
+  class CreateService < BaseService
+    attr_reader :protected_branch
+
+    def execute
+      raise Gitlab::Access::AccessDeniedError unless can?(current_user, :admin_project, project)
+
+      protected_branch = project.protected_branches.new(params)
+
+      ProtectedBranch.transaction do
+        protected_branch.save!
+
+        if protected_branch.push_access_level.blank?
+          protected_branch.create_push_access_level!(access_level: Gitlab::Access::MASTER)
+        end
+
+        if protected_branch.merge_access_level.blank?
+          protected_branch.create_merge_access_level!(access_level: Gitlab::Access::MASTER)
+        end
+      end
+
+      protected_branch
+    rescue ActiveRecord::RecordInvalid
+      protected_branch
+    end
+  end
+end
diff --git a/app/services/protected_branches/update_service.rb b/app/services/protected_branches/update_service.rb
new file mode 100644
index 00000000000..89d8ba60134
--- /dev/null
+++ b/app/services/protected_branches/update_service.rb
@@ -0,0 +1,13 @@
+module ProtectedBranches
+  class UpdateService < BaseService
+    attr_reader :protected_branch
+
+    def execute(protected_branch)
+      raise Gitlab::Access::AccessDeniedError unless can?(current_user, :admin_project, project)
+
+      @protected_branch = protected_branch
+      @protected_branch.update(params)
+      @protected_branch
+    end
+  end
+end
diff --git a/app/services/system_note_service.rb b/app/services/system_note_service.rb
index a9d5bad5122..546a8f11330 100644
--- a/app/services/system_note_service.rb
+++ b/app/services/system_note_service.rb
@@ -2,7 +2,9 @@
 #
 # Used for creating system notes (e.g., when a user references a merge request
 # from an issue, an issue's assignee changes, an issue is closed, etc.)
-class SystemNoteService
+module SystemNoteService
+  extend self
+
   # Called when commits are added to a Merge Request
   #
   # noteable         - Noteable object
@@ -15,7 +17,7 @@ class SystemNoteService
   # See new_commit_summary and existing_commit_summary.
   #
   # Returns the created Note object
-  def self.add_commits(noteable, project, author, new_commits, existing_commits = [], oldrev = nil)
+  def add_commits(noteable, project, author, new_commits, existing_commits = [], oldrev = nil)
     total_count  = new_commits.length + existing_commits.length
     commits_text = "#{total_count} commit".pluralize(total_count)
 
@@ -40,7 +42,7 @@ class SystemNoteService
   #   "Reassigned to @rspeicher"
   #
   # Returns the created Note object
-  def self.change_assignee(noteable, project, author, assignee)
+  def change_assignee(noteable, project, author, assignee)
     body = assignee.nil? ? 'Assignee removed' : "Reassigned to #{assignee.to_reference}"
 
     create_note(noteable: noteable, project: project, author: author, note: body)
@@ -63,7 +65,7 @@ class SystemNoteService
   #   "Removed ~5 label"
   #
   # Returns the created Note object
-  def self.change_label(noteable, project, author, added_labels, removed_labels)
+  def change_label(noteable, project, author, added_labels, removed_labels)
     labels_count = added_labels.count + removed_labels.count
 
     references     = ->(label) { label.to_reference(format: :id) }
@@ -101,7 +103,7 @@ class SystemNoteService
   #   "Miletone changed to 7.11"
   #
   # Returns the created Note object
-  def self.change_milestone(noteable, project, author, milestone)
+  def change_milestone(noteable, project, author, milestone)
     body = 'Milestone '
     body += milestone.nil? ? 'removed' : "changed to #{milestone.to_reference(project)}"
 
@@ -123,7 +125,7 @@ class SystemNoteService
   #   "Status changed to closed by bc17db76"
   #
   # Returns the created Note object
-  def self.change_status(noteable, project, author, status, source)
+  def change_status(noteable, project, author, status, source)
     body = "Status changed to #{status}"
     body << " by #{source.gfm_reference(project)}" if source
 
@@ -131,26 +133,26 @@ class SystemNoteService
   end
 
   # Called when 'merge when build succeeds' is executed
-  def self.merge_when_build_succeeds(noteable, project, author, last_commit)
+  def merge_when_build_succeeds(noteable, project, author, last_commit)
     body = "Enabled an automatic merge when the build for #{last_commit.to_reference(project)} succeeds"
 
     create_note(noteable: noteable, project: project, author: author, note: body)
   end
 
   # Called when 'merge when build succeeds' is canceled
-  def self.cancel_merge_when_build_succeeds(noteable, project, author)
+  def cancel_merge_when_build_succeeds(noteable, project, author)
     body = 'Canceled the automatic merge'
 
     create_note(noteable: noteable, project: project, author: author, note: body)
   end
 
-  def self.remove_merge_request_wip(noteable, project, author)
+  def remove_merge_request_wip(noteable, project, author)
     body = 'Unmarked this merge request as a Work In Progress'
 
     create_note(noteable: noteable, project: project, author: author, note: body)
   end
 
-  def self.add_merge_request_wip(noteable, project, author)
+  def add_merge_request_wip(noteable, project, author)
     body = 'Marked this merge request as a **Work In Progress**'
 
     create_note(noteable: noteable, project: project, author: author, note: body)
@@ -174,7 +176,7 @@ class SystemNoteService
   #   "Title changed from **Old** to **New**"
   #
   # Returns the created Note object
-  def self.change_title(noteable, project, author, old_title)
+  def change_title(noteable, project, author, old_title)
     new_title = noteable.title.dup
 
     old_diffs, new_diffs = Gitlab::Diff::InlineDiff.new(old_title, new_title).inline_diffs
@@ -197,7 +199,7 @@ class SystemNoteService
   # "Made the issue confidential"
   #
   # Returns the created Note object
-  def self.change_issue_confidentiality(issue, project, author)
+  def change_issue_confidentiality(issue, project, author)
     body = issue.confidential ? 'Made the issue confidential' : 'Made the issue visible'
     create_note(noteable: issue, project: project, author: author, note: body)
   end
@@ -216,7 +218,7 @@ class SystemNoteService
   #   "Target branch changed from `Old` to `New`"
   #
   # Returns the created Note object
-  def self.change_branch(noteable, project, author, branch_type, old_branch, new_branch)
+  def change_branch(noteable, project, author, branch_type, old_branch, new_branch)
     body = "#{branch_type} branch changed from `#{old_branch}` to `#{new_branch}`".capitalize
     create_note(noteable: noteable, project: project, author: author, note: body)
   end
@@ -235,7 +237,7 @@ class SystemNoteService
   #   "Restored target branch `feature`"
   #
   # Returns the created Note object
-  def self.change_branch_presence(noteable, project, author, branch_type, branch, presence)
+  def change_branch_presence(noteable, project, author, branch_type, branch, presence)
     verb =
       if presence == :add
         'restored'
@@ -251,7 +253,7 @@ class SystemNoteService
   # Example note text:
   #
   #   "Started branch `201-issue-branch-button`"
-  def self.new_issue_branch(issue, project, author, branch)
+  def new_issue_branch(issue, project, author, branch)
     h = Gitlab::Routing.url_helpers
     link = h.namespace_project_compare_url(project.namespace, project, from: project.default_branch, to: branch)
 
@@ -276,7 +278,7 @@ class SystemNoteService
   # See cross_reference_note_content.
   #
   # Returns the created Note object
-  def self.cross_reference(noteable, mentioner, author)
+  def cross_reference(noteable, mentioner, author)
     return if cross_reference_disallowed?(noteable, mentioner)
 
     gfm_reference = mentioner.gfm_reference(noteable.project)
@@ -300,7 +302,7 @@ class SystemNoteService
     end
   end
 
-  def self.cross_reference?(note_text)
+  def cross_reference?(note_text)
     note_text.start_with?(cross_reference_note_prefix)
   end
 
@@ -314,7 +316,7 @@ class SystemNoteService
   # mentioner - Mentionable object
   #
   # Returns Boolean
-  def self.cross_reference_disallowed?(noteable, mentioner)
+  def cross_reference_disallowed?(noteable, mentioner)
     return true if noteable.is_a?(ExternalIssue) && !noteable.project.jira_tracker_active?
     return false unless mentioner.is_a?(MergeRequest)
     return false unless noteable.is_a?(Commit)
@@ -334,7 +336,7 @@ class SystemNoteService
   #
   # Returns Boolean
 
-  def self.cross_reference_exists?(noteable, mentioner)
+  def cross_reference_exists?(noteable, mentioner)
     # Initial scope should be system notes of this noteable type
     notes = Note.system.where(noteable_type: noteable.class)
 
@@ -348,9 +350,60 @@ class SystemNoteService
     notes_for_mentioner(mentioner, noteable, notes).count > 0
   end
 
+  # Build an Array of lines detailing each commit added in a merge request
+  #
+  # new_commits - Array of new Commit objects
+  #
+  # Returns an Array of Strings
+  def new_commit_summary(new_commits)
+    new_commits.collect do |commit|
+      "* #{commit.short_id} - #{escape_html(commit.title)}"
+    end
+  end
+
+  # Called when the status of a Task has changed
+  #
+  # noteable  - Noteable object.
+  # project   - Project owning noteable
+  # author    - User performing the change
+  # new_task  - TaskList::Item object.
+  #
+  # Example Note text:
+  #
+  #   "Soandso marked the task Whatever as completed."
+  #
+  # Returns the created Note object
+  def change_task_status(noteable, project, author, new_task)
+    status_label = new_task.complete? ? Taskable::COMPLETED : Taskable::INCOMPLETE
+    body = "Marked the task **#{new_task.source}** as #{status_label}"
+    create_note(noteable: noteable, project: project, author: author, note: body)
+  end
+
+  # Called when noteable has been moved to another project
+  #
+  # direction    - symbol, :to or :from
+  # noteable     - Noteable object
+  # noteable_ref - Referenced noteable
+  # author       - User performing the move
+  #
+  # Example Note text:
+  #
+  #   "Moved to some_namespace/project_new#11"
+  #
+  # Returns the created Note object
+  def noteable_moved(noteable, project, noteable_ref, author, direction:)
+    unless [:to, :from].include?(direction)
+      raise ArgumentError, "Invalid direction `#{direction}`"
+    end
+
+    cross_reference = noteable_ref.to_reference(project)
+    body = "Moved #{direction} #{cross_reference}"
+    create_note(noteable: noteable, project: project, author: author, note: body)
+  end
+
   private
 
-  def self.notes_for_mentioner(mentioner, noteable, notes)
+  def notes_for_mentioner(mentioner, noteable, notes)
     if mentioner.is_a?(Commit)
       notes.where('note LIKE ?', "#{cross_reference_note_prefix}%#{mentioner.to_reference(nil)}")
     else
@@ -359,29 +412,18 @@ class SystemNoteService
     end
   end
 
-  def self.create_note(args = {})
+  def create_note(args = {})
     Note.create(args.merge(system: true))
   end
 
-  def self.cross_reference_note_prefix
+  def cross_reference_note_prefix
     'mentioned in '
   end
 
-  def self.cross_reference_note_content(gfm_reference)
+  def cross_reference_note_content(gfm_reference)
     "#{cross_reference_note_prefix}#{gfm_reference}"
   end
 
-  # Build an Array of lines detailing each commit added in a merge request
-  #
-  # new_commits - Array of new Commit objects
-  #
-  # Returns an Array of Strings
-  def self.new_commit_summary(new_commits)
-    new_commits.collect do |commit|
-      "* #{commit.short_id} - #{escape_html(commit.title)}"
-    end
-  end
-
   # Build a single line summarizing existing commits being added in a merge
   # request
   #
@@ -398,7 +440,7 @@ class SystemNoteService
   #   "* ea0f8418 - 1 commit from branch `feature`"
   #
   # Returns a newline-terminated String
-  def self.existing_commit_summary(noteable, existing_commits, oldrev = nil)
+  def existing_commit_summary(noteable, existing_commits, oldrev = nil)
     return '' if existing_commits.empty?
 
     count = existing_commits.size
@@ -421,47 +463,7 @@ class SystemNoteService
     "* #{commit_ids} - #{commits_text} from branch `#{branch}`\n"
   end
 
-  # Called when the status of a Task has changed
-  #
-  # noteable  - Noteable object.
-  # project   - Project owning noteable
-  # author    - User performing the change
-  # new_task  - TaskList::Item object.
-  #
-  # Example Note text:
-  #
-  #   "Soandso marked the task Whatever as completed."
-  #
-  # Returns the created Note object
-  def self.change_task_status(noteable, project, author, new_task)
-    status_label = new_task.complete? ? Taskable::COMPLETED : Taskable::INCOMPLETE
-    body = "Marked the task **#{new_task.source}** as #{status_label}"
-    create_note(noteable: noteable, project: project, author: author, note: body)
-  end
-
-  # Called when noteable has been moved to another project
-  #
-  # direction    - symbol, :to or :from
-  # noteable     - Noteable object
-  # noteable_ref - Referenced noteable
-  # author       - User performing the move
-  #
-  # Example Note text:
-  #
-  #   "Moved to some_namespace/project_new#11"
-  #
-  # Returns the created Note object
-  def self.noteable_moved(noteable, project, noteable_ref, author, direction:)
-    unless [:to, :from].include?(direction)
-      raise ArgumentError, "Invalid direction `#{direction}`"
-    end
-
-    cross_reference = noteable_ref.to_reference(project)
-    body = "Moved #{direction} #{cross_reference}"
-    create_note(noteable: noteable, project: project, author: author, note: body)
-  end
-
-  def self.escape_html(text)
+  def escape_html(text)
     Rack::Utils.escape_html(text)
   end
 end
diff --git a/app/views/admin/builds/_build.html.haml b/app/views/admin/builds/_build.html.haml
index ce818c30c30..352adbedee4 100644
--- a/app/views/admin/builds/_build.html.haml
+++ b/app/views/admin/builds/_build.html.haml
@@ -11,16 +11,18 @@
       - else
         %span.build-link ##{build.id}
 
-      - if build.stuck?
-        %i.fa.fa-warning.text-warning
-
       - if build.ref
+        .icon-container
+          = build.tag? ? icon('tag') : icon('code-fork')
         = link_to build.ref, namespace_project_commits_path(build.project.namespace, build.project, build.ref), class: "monospace branch-name"
       - else
         .light none
-      = custom_icon("icon_commit")
+      .icon-container
+        = custom_icon("icon_commit")
 
       = link_to build.short_sha, namespace_project_commit_path(build.project.namespace, build.project, build.sha), class: "monospace commit-id"
+      - if build.stuck?
+        %i.fa.fa-warning.text-warning
 
       .label-container
         - if build.tags.any?
diff --git a/app/views/help/ui.html.haml b/app/views/help/ui.html.haml
index 431d312b4ca..85e188d6f8b 100644
--- a/app/views/help/ui.html.haml
+++ b/app/views/help/ui.html.haml
@@ -189,7 +189,7 @@
             %li
               %a Sort by date
 
-        = link_to 'New issue', '#', class: 'btn btn-new'
+        = link_to 'New issue', '#', class: 'btn btn-new btn-inverted'
 
   .lead
     Only nav links without button and search
diff --git a/app/views/layouts/nav/_project.html.haml b/app/views/layouts/nav/_project.html.haml
index 9e65d94186b..1d3b8fc3683 100644
--- a/app/views/layouts/nav/_project.html.haml
+++ b/app/views/layouts/nav/_project.html.haml
@@ -66,7 +66,7 @@
 
     - if project_nav_tab? :issues
       = nav_link(controller: [:issues, :labels, :milestones]) do
-        = link_to url_for_project_issues(@project, only_path: true), title: 'Issues', class: 'shortcuts-issues' do
+        = link_to namespace_project_issues_path(@project.namespace, @project), title: 'Issues', class: 'shortcuts-issues' do
           %span
             Issues
             - if @project.default_issues_tracker?
diff --git a/app/views/projects/blob/_actions.html.haml b/app/views/projects/blob/_actions.html.haml
index cdac50f7a8d..ff893ea74e1 100644
--- a/app/views/projects/blob/_actions.html.haml
+++ b/app/views/projects/blob/_actions.html.haml
@@ -16,6 +16,7 @@
 
 - if current_user
   .btn-group{ role: "group" }
-    = edit_blob_link
+    - if blob_text_viewable?(@blob)
+      = edit_blob_link
     = replace_blob_link
     = delete_blob_link
diff --git a/app/views/projects/branches/_commit.html.haml b/app/views/projects/branches/_commit.html.haml
index 9fe65cbb104..d54c76ff9c8 100644
--- a/app/views/projects/branches/_commit.html.haml
+++ b/app/views/projects/branches/_commit.html.haml
@@ -1,5 +1,5 @@
 .branch-commit
-  = link_to commit.short_id, namespace_project_commit_path(project.namespace, project, commit), class: "commit-id monospace"
+  = link_to commit.short_id, namespace_project_commit_path(project.namespace, project, commit.id), class: "commit-id monospace"
   &middot;
   %span.str-truncated
     = link_to_gfm commit.title, namespace_project_commit_path(project.namespace, project, commit.id), class: "commit-row-message"
diff --git a/app/views/projects/buttons/_dropdown.html.haml b/app/views/projects/buttons/_dropdown.html.haml
index 16b8e1cca91..ca907077c2b 100644
--- a/app/views/projects/buttons/_dropdown.html.haml
+++ b/app/views/projects/buttons/_dropdown.html.haml
@@ -9,7 +9,7 @@
 
       - if can_create_issue
         %li
-          = link_to url_for_new_issue(@project, only_path: true) do
+          = link_to new_namespace_project_issue_path(@project.namespace, @project) do
             = icon('exclamation-circle fw')
             New issue
 
diff --git a/app/views/projects/ci/builds/_build.html.haml b/app/views/projects/ci/builds/_build.html.haml
index a3114771a42..91081435220 100644
--- a/app/views/projects/ci/builds/_build.html.haml
+++ b/app/views/projects/ci/builds/_build.html.haml
@@ -13,13 +13,6 @@
       - else
         %span ##{build.id}
 
-      - if build.stuck?
-        .icon-container
-          = icon('warning', class: 'text-warning has-tooltip', title: 'Build is stuck. Check runners.')
-      - if defined?(retried) && retried
-        .icon-container
-          = icon('warning', class: 'text-warning has-tooltip', title: 'Build was retried.')
-
       - if defined?(ref) && ref
         - if build.ref
           .icon-container
@@ -33,6 +26,11 @@
       - if defined?(commit_sha) && commit_sha
         = link_to build.short_sha, namespace_project_commit_path(build.project.namespace, build.project, build.sha), class: "commit-id monospace"
 
+      - if build.stuck?
+        = icon('warning', class: 'text-warning has-tooltip', title: 'Build is stuck. Check runners.')
+      - if defined?(retried) && retried
+        = icon('warning', class: 'text-warning has-tooltip', title: 'Build was retried.')
+
       .label-container
         - if build.tags.any?
           - build.tags.each do |tag|
@@ -47,7 +45,6 @@
         - if build.manual?
           %span.label.label-info manual
 
-
   - if defined?(runner) && runner
     %td
       - if build.try(:runner)
diff --git a/app/views/projects/ci/pipelines/_pipeline.html.haml b/app/views/projects/ci/pipelines/_pipeline.html.haml
index 2f7d54f0bdd..558c35553da 100644
--- a/app/views/projects/ci/pipelines/_pipeline.html.haml
+++ b/app/views/projects/ci/pipelines/_pipeline.html.haml
@@ -57,7 +57,7 @@
 
   %td.pipeline-actions
     .controls.hidden-xs.pull-right
-      - artifacts = pipeline.builds.latest.select { |b| b.artifacts? }
+      - artifacts = pipeline.builds.latest.with_artifacts_not_expired
       - actions = pipeline.manual_actions
       - if artifacts.present? || actions.any?
         .btn-group.inline
diff --git a/app/views/projects/commit/_ci_menu.html.haml b/app/views/projects/commit/_ci_menu.html.haml
index ea33aa472a6..935433306ea 100644
--- a/app/views/projects/commit/_ci_menu.html.haml
+++ b/app/views/projects/commit/_ci_menu.html.haml
@@ -2,7 +2,7 @@
   = nav_link(path: 'commit#show') do
     = link_to namespace_project_commit_path(@project.namespace, @project, @commit.id) do
       Changes
-      %span.badge= @diffs.count
+      %span.badge= @diffs.size
   = nav_link(path: 'commit#builds') do
     = link_to builds_namespace_project_commit_path(@project.namespace, @project, @commit.id) do
       Builds
diff --git a/app/views/projects/commit/show.html.haml b/app/views/projects/commit/show.html.haml
index d0da2606587..ed44d86a687 100644
--- a/app/views/projects/commit/show.html.haml
+++ b/app/views/projects/commit/show.html.haml
@@ -7,7 +7,7 @@
   = render "ci_menu"
 - else
   %div.block-connector
-= render "projects/diffs/diffs", diffs: @diffs, project: @project, diff_refs: @commit.diff_refs
+= render "projects/diffs/diffs", diffs: @diffs
 = render "projects/notes/notes_with_form"
 - if can_collaborate_with_project?
   - %w(revert cherry-pick).each do |type|
diff --git a/app/views/projects/compare/_form.html.haml b/app/views/projects/compare/_form.html.haml
index af09b3418ea..d79336f5a60 100644
--- a/app/views/projects/compare/_form.html.haml
+++ b/app/views/projects/compare/_form.html.haml
@@ -1,7 +1,7 @@
 = form_tag namespace_project_compare_index_path(@project.namespace, @project), method: :post, class: 'form-inline js-requires-input' do
   .clearfix
     - if params[:to] && params[:from]
-      = link_to 'switch', {from: params[:to], to: params[:from]}, {class: 'commits-compare-switch has-tooltip', title: 'Switch base of comparison'}
+      = link_to icon('exchange'), {from: params[:to], to: params[:from]}, {class: 'commits-compare-switch has-tooltip', title: 'Switch base of comparison'}
     .form-group.dropdown.compare-form-group.js-compare-from-dropdown
       .input-group.inline-input-group
         %span.input-group-addon from
diff --git a/app/views/projects/compare/show.html.haml b/app/views/projects/compare/show.html.haml
index 28a50e7031a..819e9bc15ae 100644
--- a/app/views/projects/compare/show.html.haml
+++ b/app/views/projects/compare/show.html.haml
@@ -8,7 +8,7 @@
 
   - if @commits.present?
     = render "projects/commits/commit_list"
-    = render "projects/diffs/diffs", diffs: @diffs, project: @project, diff_refs: @diff_refs
+    = render "projects/diffs/diffs", diffs: @diffs
   - else
     .light-well
       .center
diff --git a/app/views/projects/diffs/_diffs.html.haml b/app/views/projects/diffs/_diffs.html.haml
index 4bf3ccace20..20dc280c3b2 100644
--- a/app/views/projects/diffs/_diffs.html.haml
+++ b/app/views/projects/diffs/_diffs.html.haml
@@ -1,20 +1,19 @@
 - show_whitespace_toggle = local_assigns.fetch(:show_whitespace_toggle, true)
+- diff_files = diffs.diff_files
 - if diff_view == 'parallel'
   - fluid_layout true
 
-- diff_files = safe_diff_files(diffs, diff_refs: diff_refs, repository: project.repository)
-
 .content-block.oneline-block.files-changed
   .inline-parallel-buttons
     - if !expand_all_diffs? && diff_files.any? { |diff_file| diff_file.collapsed? }
       = link_to 'Expand all', url_for(params.merge(expand_all_diffs: 1, format: nil)), class: 'btn btn-default'
     - if show_whitespace_toggle
       - if current_controller?(:commit)
-        = commit_diff_whitespace_link(@project, @commit, class: 'hidden-xs')
+        = commit_diff_whitespace_link(diffs.project, @commit, class: 'hidden-xs')
       - elsif current_controller?(:merge_requests)
-        = diff_merge_request_whitespace_link(@project, @merge_request, class: 'hidden-xs')
+        = diff_merge_request_whitespace_link(diffs.project, @merge_request, class: 'hidden-xs')
       - elsif current_controller?(:compare)
-        = diff_compare_whitespace_link(@project, params[:from], params[:to], class: 'hidden-xs')
+        = diff_compare_whitespace_link(diffs.project, params[:from], params[:to], class: 'hidden-xs')
     .btn-group
       = inline_diff_btn
       = parallel_diff_btn
@@ -23,12 +22,12 @@
 - if diff_files.overflow?
   = render 'projects/diffs/warning', diff_files: diff_files
 
-.files{data: {can_create_note: (!@diff_notes_disabled && can?(current_user, :create_note, @project))}}
+.files{data: {can_create_note: (!@diff_notes_disabled && can?(current_user, :create_note, diffs.project))}}
   - diff_files.each_with_index do |diff_file, index|
     - diff_commit = commit_for_diff(diff_file)
     - blob = diff_file.blob(diff_commit)
     - next unless blob
-    - blob.load_all_data!(project.repository) unless blob.only_display_raw?
+    - blob.load_all_data!(diffs.project.repository) unless blob.only_display_raw?
 
-    = render 'projects/diffs/file', i: index, project: project,
-      diff_file: diff_file, diff_commit: diff_commit, blob: blob, diff_refs: diff_refs
+    = render 'projects/diffs/file', i: index, project: diffs.project,
+      diff_file: diff_file, diff_commit: diff_commit, blob: blob
diff --git a/app/views/projects/diffs/_file.html.haml b/app/views/projects/diffs/_file.html.haml
index c306909fb1a..f914e13a1ec 100644
--- a/app/views/projects/diffs/_file.html.haml
+++ b/app/views/projects/diffs/_file.html.haml
@@ -9,11 +9,12 @@
             = icon('comment')
           \
 
-        - if editable_diff?(diff_file)
-          = edit_blob_link(@merge_request.source_project,
-              @merge_request.source_branch, diff_file.new_path,
-              from_merge_request_id: @merge_request.id)
+          - if editable_diff?(diff_file)
+            = edit_blob_link(@merge_request.source_project,
+                @merge_request.source_branch, diff_file.new_path,
+                from_merge_request_id: @merge_request.id,
+                skip_visible_check: true)
 
-        = view_file_btn(diff_commit.id, diff_file, project)
+        = view_file_btn(diff_commit.id, diff_file.new_path, project)
 
-  = render 'projects/diffs/content', diff_file: diff_file, diff_commit: diff_commit, diff_refs: diff_refs, blob: blob, project: project
+  = render 'projects/diffs/content', diff_file: diff_file, diff_commit: diff_commit, blob: blob, project: project
diff --git a/app/views/projects/diffs/_line.html.haml b/app/views/projects/diffs/_line.html.haml
index 5a8a131d10c..4d3af905b58 100644
--- a/app/views/projects/diffs/_line.html.haml
+++ b/app/views/projects/diffs/_line.html.haml
@@ -1,8 +1,7 @@
 - plain = local_assigns.fetch(:plain, false)
-- line_code = diff_file.line_code(line)
-- position = diff_file.position(line)
 - type = line.type
-%tr.line_holder{ id: line_code, class: type }
+- line_code = diff_file.line_code(line) unless plain
+%tr.line_holder{ plain ? { class: type} : { class: type, id: line_code } }
   - case type
   - when 'match'
     = render "projects/diffs/match_line", { line: line.text,
@@ -24,4 +23,4 @@
         = link_text
       - else
         %a{href: "##{line_code}", data: { linenumber: link_text }}
-    %td.line_content.noteable_line{ class: type, data: (diff_view_line_data(line_code, position, type) unless plain) }= diff_line_content(line.text, type)
+    %td.line_content.noteable_line{ class: type, data: (diff_view_line_data(line_code, diff_file.position(line), type) unless plain) }= diff_line_content(line.text, type)
diff --git a/app/views/projects/diffs/_stats.html.haml b/app/views/projects/diffs/_stats.html.haml
index ea2a3e01277..e751dabdf99 100644
--- a/app/views/projects/diffs/_stats.html.haml
+++ b/app/views/projects/diffs/_stats.html.haml
@@ -2,7 +2,7 @@
   .commit-stat-summary
     Showing
     = link_to '#', class: 'js-toggle-button' do
-      %strong #{pluralize(diff_files.count, "changed file")}
+      %strong #{pluralize(diff_files.size, "changed file")}
     with
     %strong.cgreen #{diff_files.sum(&:added_lines)} additions
     and
diff --git a/app/views/projects/diffs/_warning.html.haml b/app/views/projects/diffs/_warning.html.haml
index 10fa1ddf2e5..295a1b62535 100644
--- a/app/views/projects/diffs/_warning.html.haml
+++ b/app/views/projects/diffs/_warning.html.haml
@@ -11,5 +11,5 @@
           = link_to "Email patch", merge_request_path(@merge_request, format: :patch), class: "btn btn-sm"
   %p
     To preserve performance only
-    %strong #{diff_files.count} of #{diff_files.real_size}
+    %strong #{diff_files.size} of #{diff_files.real_size}
     files are displayed.
diff --git a/app/views/projects/environments/_form.html.haml b/app/views/projects/environments/_form.html.haml
index c07f4bd510c..6d040f5cfe6 100644
--- a/app/views/projects/environments/_form.html.haml
+++ b/app/views/projects/environments/_form.html.haml
@@ -1,7 +1,22 @@
-= form_for @environment, url: namespace_project_environments_path(@project.namespace, @project), html: { class: 'col-lg-9' } do |f|
-  = form_errors(@environment)
-  .form-group
-    = f.label :name, 'Name', class: 'label-light'
-    = f.text_field :name, required: true, class: 'form-control'
-  = f.submit 'Create environment', class: 'btn btn-create'
-  = link_to 'Cancel', namespace_project_environments_path(@project.namespace, @project), class: 'btn btn-cancel'
+.row.prepend-top-default.append-bottom-default
+  .col-lg-3
+    %h4.prepend-top-0
+      Environments
+    %p
+      Environments allow you to track deployments of your application
+      = succeed "." do
+        = link_to "Read more about environments", help_page_path("ci/environments")
+
+  = form_for [@project.namespace.becomes(Namespace), @project, @environment], html: { class: 'col-lg-9' } do |f|
+    = form_errors(@environment)
+
+    .form-group
+      = f.label :name, 'Name', class: 'label-light'
+      = f.text_field :name, required: true, class: 'form-control'
+    .form-group
+      = f.label :external_url, 'External URL', class: 'label-light'
+      = f.url_field :external_url, class: 'form-control'
+
+    .form-actions
+      = f.submit 'Save', class: 'btn btn-save'
+      = link_to 'Cancel', namespace_project_environments_path(@project.namespace, @project), class: 'btn btn-cancel'
diff --git a/app/views/projects/environments/edit.html.haml b/app/views/projects/environments/edit.html.haml
new file mode 100644
index 00000000000..6d1bdb9320f
--- /dev/null
+++ b/app/views/projects/environments/edit.html.haml
@@ -0,0 +1,6 @@
+- page_title "Edit", @environment.name, "Environments"
+
+%h3.page-title
+  Edit environment
+%hr
+= render 'form'
diff --git a/app/views/projects/environments/new.html.haml b/app/views/projects/environments/new.html.haml
index 89e06567196..e51667ade2d 100644
--- a/app/views/projects/environments/new.html.haml
+++ b/app/views/projects/environments/new.html.haml
@@ -1,12 +1,6 @@
 - page_title 'New Environment'
 
-.row.prepend-top-default.append-bottom-default
-  .col-lg-3
-    %h4.prepend-top-0
-      New Environment
-    %p
-      Environments allow you to track deployments of your application
-      = succeed "." do
-        = link_to "Read more about environments", help_page_path("ci/environments")
-
-  = render 'form'
+%h3.page-title
+  New environment
+%hr
+= render 'form'
diff --git a/app/views/projects/environments/show.html.haml b/app/views/projects/environments/show.html.haml
index b8b1ce52a91..a07436ad7c9 100644
--- a/app/views/projects/environments/show.html.haml
+++ b/app/views/projects/environments/show.html.haml
@@ -6,10 +6,10 @@
   .top-area
     .col-md-9
       %h3.page-title= @environment.name.capitalize
-
     .col-md-3
       .nav-controls
         - if can?(current_user, :update_environment, @environment)
+          = link_to 'Edit', edit_namespace_project_environment_path(@project.namespace, @project, @environment), class: 'btn'
           = link_to 'Destroy', namespace_project_environment_path(@project.namespace, @project, @environment), data: { confirm: 'Are you sure you want to delete this environment?' }, class: 'btn btn-danger', method: :delete
 
   - if @deployments.blank?
diff --git a/app/views/projects/graphs/show.html.haml b/app/views/projects/graphs/show.html.haml
index a985b442b2d..ac5f792d140 100644
--- a/app/views/projects/graphs/show.html.haml
+++ b/app/views/projects/graphs/show.html.haml
@@ -32,7 +32,7 @@
 :javascript
   $.ajax({
     type: "GET",
-    url: location.href,
+    url: "#{namespace_project_graph_path(@project.namespace, @project, current_ref, format: :json)}",
     dataType: "json",
     success: function (data) {
       var graph = new ContributorsStatGraph();
diff --git a/app/views/projects/issues/_head.html.haml b/app/views/projects/issues/_head.html.haml
index 403adb7426b..60b45115b73 100644
--- a/app/views/projects/issues/_head.html.haml
+++ b/app/views/projects/issues/_head.html.haml
@@ -2,7 +2,7 @@
   %ul{ class: (container_class) }
     - if project_nav_tab?(:issues) && !current_controller?(:merge_requests)
       = nav_link(controller: :issues) do
-        = link_to url_for_project_issues(@project, only_path: true), title: 'Issues' do
+        = link_to namespace_project_issues_path(@project.namespace, @project), title: 'Issues' do
           %span
             Issues
 
diff --git a/app/views/projects/issues/_related_branches.html.haml b/app/views/projects/issues/_related_branches.html.haml
index c6fc499a7b8..6ea9f612d13 100644
--- a/app/views/projects/issues/_related_branches.html.haml
+++ b/app/views/projects/issues/_related_branches.html.haml
@@ -4,8 +4,8 @@
   %ul.unstyled-list
     - @related_branches.each do |branch|
       %li
-        - sha = @project.repository.find_branch(branch).target
-        - pipeline = @project.pipeline(sha, branch) if sha
+        - target = @project.repository.find_branch(branch).target
+        - pipeline = @project.pipeline(target.sha, branch) if target
         - if pipeline
           %span.related-branch-ci-status
             = render_pipeline_status(pipeline)
diff --git a/app/views/projects/issues/index.html.haml b/app/views/projects/issues/index.html.haml
index d0edd2f22ec..1a87045aa60 100644
--- a/app/views/projects/issues/index.html.haml
+++ b/app/views/projects/issues/index.html.haml
@@ -19,7 +19,13 @@
               Subscribe
         = render 'shared/issuable/search_form', path: namespace_project_issues_path(@project.namespace, @project)
         - if can? current_user, :create_issue, @project
-          = link_to new_namespace_project_issue_path(@project.namespace, @project, issue: { assignee_id: @issuable_finder.assignee.try(:id), milestone_id: @issuable_finder.milestones.try(:first).try(:id) }), class: "btn btn-new", title: "New Issue", id: "new_issue_link" do
+          = link_to new_namespace_project_issue_path(@project.namespace,
+                                                     @project,
+                                                     issue: { assignee_id: issues_finder.assignee.try(:id),
+                                                              milestone_id: issues_finder.milestones.first.try(:id) }),
+                                                     class: "btn btn-new",
+                                                     title: "New Issue",
+                                                     id: "new_issue_link" do
             New Issue
     = render 'shared/issuable/filter', type: :issues
 
diff --git a/app/views/projects/issues/show.html.haml b/app/views/projects/issues/show.html.haml
index 9b6a97c0959..e5cce16a171 100644
--- a/app/views/projects/issues/show.html.haml
+++ b/app/views/projects/issues/show.html.haml
@@ -38,7 +38,7 @@
               %li
                 = link_to 'Edit', edit_namespace_project_issue_path(@project.namespace, @project, @issue)
         - if can?(current_user, :create_issue, @project)
-          = link_to new_namespace_project_issue_path(@project.namespace, @project), class: 'hidden-xs hidden-sm btn btn-grouped new-issue-link btn-success', title: 'New issue', id: 'new_issue_link' do
+          = link_to new_namespace_project_issue_path(@project.namespace, @project), class: 'hidden-xs hidden-sm btn btn-grouped new-issue-link btn-new btn-inverted', title: 'New issue', id: 'new_issue_link' do
             New issue
         - if can?(current_user, :update_issue, @issue)
           = link_to 'Reopen issue', issue_path(@issue, issue: { state_event: :reopen }, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "hidden-xs hidden-sm btn btn-grouped btn-reopen #{issue_button_visibility(@issue, false)}", title: 'Reopen issue'
diff --git a/app/views/projects/merge_requests/_new_submit.html.haml b/app/views/projects/merge_requests/_new_submit.html.haml
index a5e67b95727..598bd743676 100644
--- a/app/views/projects/merge_requests/_new_submit.html.haml
+++ b/app/views/projects/merge_requests/_new_submit.html.haml
@@ -42,7 +42,7 @@
           %h4 This comparison includes more than #{MergeRequestDiff::COMMITS_SAFE_SIZE} commits.
           %p To preserve performance the line changes are not shown.
       - else
-        = render "projects/diffs/diffs", diffs: @diffs, project: @project, diff_refs: @merge_request.diff_refs, show_whitespace_toggle: false
+        = render "projects/diffs/diffs", diffs: @diffs, show_whitespace_toggle: false
     - if @pipeline
       #builds.builds.tab-pane
         = render "projects/merge_requests/show/builds"
diff --git a/app/views/projects/merge_requests/show/_diffs.html.haml b/app/views/projects/merge_requests/show/_diffs.html.haml
index 1b0bae86ad4..013b05628fa 100644
--- a/app/views/projects/merge_requests/show/_diffs.html.haml
+++ b/app/views/projects/merge_requests/show/_diffs.html.haml
@@ -1,6 +1,5 @@
 - if @merge_request_diff.collected?
-  = render "projects/diffs/diffs", diffs: @merge_request.diffs(diff_options),
-    project: @merge_request.project, diff_refs: @merge_request.diff_refs
+  = render "projects/diffs/diffs", diffs: @diffs
 - elsif @merge_request_diff.empty?
   .nothing-here-block Nothing to merge from #{@merge_request.source_branch} into #{@merge_request.target_branch}
 - else
diff --git a/app/views/projects/protected_branches/_branches_list.html.haml b/app/views/projects/protected_branches/_branches_list.html.haml
index 720d67dff7c..0603a014008 100644
--- a/app/views/projects/protected_branches/_branches_list.html.haml
+++ b/app/views/projects/protected_branches/_branches_list.html.haml
@@ -5,24 +5,22 @@
     No branches are protected, protect a branch with the form above.
 - else
   - can_admin_project = can?(current_user, :admin_project, @project)
-  .table-responsive
-    %table.table.protected-branches-list
-      %colgroup
-        %col{ width: "20%" }
-        %col{ width: "30%" }
-        %col{ width: "25%" }
-        %col{ width: "25%" }
+
+  %table.table.protected-branches-list
+    %colgroup
+      %col{ width: "20%" }
+      %col{ width: "30%" }
+      %col{ width: "25%" }
+      %col{ width: "25%" }
+    %thead
+      %tr
+        %th Branch
+        %th Last commit
+        %th Allowed to merge
+        %th Allowed to push
         - if can_admin_project
-          %col
-      %thead
-        %tr
-          %th Protected Branch
-          %th Commit
-          %th Developers Can Push
-          %th Developers Can Merge
-          - if can_admin_project
-            %th
-      %tbody
-        = render partial: @protected_branches, locals: { can_admin_project: can_admin_project }
+          %th
+    %tbody
+      = render partial: @protected_branches, locals: { can_admin_project: can_admin_project }
 
   = paginate @protected_branches, theme: 'gitlab'
diff --git a/app/views/projects/protected_branches/_protected_branch.html.haml b/app/views/projects/protected_branches/_protected_branch.html.haml
index 7fda7f96047..498e412235e 100644
--- a/app/views/projects/protected_branches/_protected_branch.html.haml
+++ b/app/views/projects/protected_branches/_protected_branch.html.haml
@@ -15,9 +15,15 @@
       - else
         (branch was removed from repository)
   %td
-    = check_box_tag("developers_can_push", protected_branch.id, protected_branch.developers_can_push, data: { url: url })
+    = hidden_field_tag "allowed_to_merge_#{protected_branch.id}", protected_branch.merge_access_level.access_level
+    = dropdown_tag(protected_branch.merge_access_level.humanize,
+                   options: { title: "Allowed to merge", toggle_class: 'allowed-to-merge', dropdown_class: 'dropdown-menu-selectable merge',
+                   data: { field_name: "allowed_to_merge_#{protected_branch.id}", url: url, id: protected_branch.id, type: "merge_access_level" }})
   %td
-    = check_box_tag("developers_can_merge", protected_branch.id, protected_branch.developers_can_merge, data: { url: url })
+    = hidden_field_tag "allowed_to_push_#{protected_branch.id}", protected_branch.push_access_level.access_level
+    = dropdown_tag(protected_branch.push_access_level.humanize,
+                   options: { title: "Allowed to push", toggle_class: 'allowed-to-push', dropdown_class: 'dropdown-menu-selectable push',
+                   data: { field_name: "allowed_to_push_#{protected_branch.id}", url: url, id: protected_branch.id, type: "push_access_level" }})
   - if can_admin_project
     %td
       = link_to 'Unprotect', [@project.namespace.becomes(Namespace), @project, protected_branch], data: { confirm: 'Branch will be writable for developers. Are you sure?' }, method: :delete, class: "btn btn-warning btn-sm pull-right"
diff --git a/app/views/projects/protected_branches/index.html.haml b/app/views/projects/protected_branches/index.html.haml
index 950df740bbc..4efe44c7233 100644
--- a/app/views/projects/protected_branches/index.html.haml
+++ b/app/views/projects/protected_branches/index.html.haml
@@ -32,18 +32,22 @@
             are supported.
 
         .form-group
-          = f.check_box :developers_can_push, class: "pull-left"
-          .prepend-left-20
-            = f.label :developers_can_push, "Developers can push", class: "label-light append-bottom-0"
-            %p.light.append-bottom-0
-              Allow developers to push to this branch
+          = hidden_field_tag 'protected_branch[merge_access_level_attributes][access_level]'
+          = label_tag "Allowed to merge: ", nil, class: "label-light append-bottom-0"
+          = dropdown_tag("<Make a selection>",
+                         options: { title: "Allowed to merge", toggle_class: 'allowed-to-merge',
+                                    dropdown_class: 'dropdown-menu-selectable',
+                                    data: { field_name: "protected_branch[merge_access_level_attributes][access_level]" }})
 
         .form-group
-          = f.check_box :developers_can_merge, class: "pull-left"
-          .prepend-left-20
-            = f.label :developers_can_merge, "Developers can merge", class: "label-light append-bottom-0"
-            %p.light.append-bottom-0
-              Allow developers to accept merge requests to this branch
+          = hidden_field_tag 'protected_branch[push_access_level_attributes][access_level]'
+          = label_tag "Allowed to push: ", nil, class: "label-light append-bottom-0"
+          = dropdown_tag("<Make a selection>",
+                         options: { title: "Allowed to push", toggle_class: 'allowed-to-push',
+                                    dropdown_class: 'dropdown-menu-selectable',
+                                    data: { field_name: "protected_branch[push_access_level_attributes][access_level]" }})
+
+
         = f.submit "Protect", class: "btn-create btn protect-branch-btn", disabled: true
 
     %hr
diff --git a/app/views/projects/show.html.haml b/app/views/projects/show.html.haml
index dd1cf680cfa..a666d07e9eb 100644
--- a/app/views/projects/show.html.haml
+++ b/app/views/projects/show.html.haml
@@ -43,6 +43,10 @@
       %li
         = link_to 'Contribution guide', contribution_guide_path(@project)
 
+    - if @repository.gitlab_ci_yml
+      %li
+        = link_to 'CI configuration', ci_configuration_path(@project)
+
     - if current_user && can_push_branch?(@project, @project.default_branch)
       - unless @repository.changelog
         %li.missing
diff --git a/app/views/projects/tree/_tree_commit_column.html.haml b/app/views/projects/tree/_tree_commit_column.html.haml
index a3a4bd4f752..84da16b6bb1 100644
--- a/app/views/projects/tree/_tree_commit_column.html.haml
+++ b/app/views/projects/tree/_tree_commit_column.html.haml
@@ -1,2 +1,2 @@
 %span.str-truncated
-  = link_to_gfm commit.title, namespace_project_commit_path(@project.namespace, @project, commit.id), class: "tree-commit-link"
+  = link_to_gfm commit.full_title, namespace_project_commit_path(@project.namespace, @project, commit.id), class: "tree-commit-link"
diff --git a/app/views/projects/wikis/_form.html.haml b/app/views/projects/wikis/_form.html.haml
index 797a1a59e9f..643f7c589e6 100644
--- a/app/views/projects/wikis/_form.html.haml
+++ b/app/views/projects/wikis/_form.html.haml
@@ -18,9 +18,14 @@
       .error-alert
 
       .help-block
-        To link to a (new) page, simply type
-        %code [Link Title](page-slug)
-        \.
+        = succeed '.' do
+          To link to a (new) page, simply type
+          %code [Link Title](page-slug)
+
+        = succeed '.' do
+          More examples are in the
+          = link_to 'documentation', help_page_path("user/project/markdown", anchor: "wiki-specific-markdown")
+
   .form-group
     = f.label :commit_message, class: 'control-label'
     .col-sm-10= f.text_field :message, class: 'form-control', rows: 18
diff --git a/app/views/search/results/_note.html.haml b/app/views/search/results/_note.html.haml
index 8163aff43b6..e0400083870 100644
--- a/app/views/search/results/_note.html.haml
+++ b/app/views/search/results/_note.html.haml
@@ -1,6 +1,7 @@
 - project = note.project
 - note_url = Gitlab::UrlBuilder.build(note)
-- noteable_identifier = note.noteable.try(:iid) || note.noteable.id
+- noteable_identifier = note.noteable.try(:iid) || note.noteable.try(:id)
+
 .search-result-row
   %h5.note-search-caption.str-truncated
     %i.fa.fa-comment
@@ -10,7 +11,10 @@
     &middot;
 
     - if note.for_commit?
-      = link_to "Commit #{truncate_sha(note.commit_id)}", note_url
+      = link_to_if(noteable_identifier, "Commit #{truncate_sha(note.commit_id)}", note_url) do
+        = truncate_sha(note.commit_id)
+        %span.light Commit deleted
+
     - else
       %span #{note.noteable_type.titleize} ##{noteable_identifier}
       &middot;
diff --git a/app/workers/emails_on_push_worker.rb b/app/workers/emails_on_push_worker.rb
index 0b6a01a3200..c6a5af2809a 100644
--- a/app/workers/emails_on_push_worker.rb
+++ b/app/workers/emails_on_push_worker.rb
@@ -33,25 +33,14 @@ class EmailsOnPushWorker
     reverse_compare = false
 
     if action == :push
-      merge_base_sha = project.merge_base_commit(before_sha, after_sha).try(:sha)
-      compare = Gitlab::Git::Compare.new(project.repository.raw_repository, before_sha, after_sha)
-
-      diff_refs = Gitlab::Diff::DiffRefs.new(
-        base_sha: merge_base_sha,
-        start_sha: before_sha,
-        head_sha: after_sha
-      )
+      compare = CompareService.new.execute(project, before_sha, project, after_sha)
+      diff_refs = compare.diff_refs
 
       return false if compare.same
 
       if compare.commits.empty?
-        compare = Gitlab::Git::Compare.new(project.repository.raw_repository, after_sha, before_sha)
-
-        diff_refs = Gitlab::Diff::DiffRefs.new(
-          base_sha: merge_base_sha,
-          start_sha: after_sha,
-          head_sha: before_sha
-        )
+        compare = CompareService.new.execute(project, after_sha, project, before_sha)
+        diff_refs = compare.diff_refs
 
         reverse_compare = true
 
diff --git a/app/workers/irker_worker.rb b/app/workers/irker_worker.rb
index 605ec4f04e5..19f38358eb5 100644
--- a/app/workers/irker_worker.rb
+++ b/app/workers/irker_worker.rb
@@ -141,8 +141,10 @@ class IrkerWorker
   end
 
   def files_count(commit)
-    files = "#{commit.diffs.real_size} file"
-    files += 's' if commit.diffs.count > 1
+    diffs = commit.raw_diffs(deltas_only: true)
+
+    files = "#{diffs.real_size} file"
+    files += 's' if diffs.size > 1
     files
   end