Merge branch 'ambiguous-sha' into 'master'

Fix ambiguous sha problem with mentioned commit

Before: write in database only 6 chars of commit sha. This cause to `Ambiguous SHA1 prefix` exception.

- [x] write full commit sha in db.
- [x] Standardise usage of sha truncation: 8 characters everywhere.
- [x] prevent exception when ambiguous sha requested in markdown

Fixes #1644

See merge request !1171

15 files changed, 37 insertions, 15 deletions

diff --git a/app/helpers/commits_helper.rb b/app/helpers/commits_helper.rb
index cab2984a4c4..0e0532b65b2 100644
--- a/app/helpers/commits_helper.rb
+++ b/app/helpers/commits_helper.rb
@@ -120,4 +120,8 @@ module CommitsHelper
                                        class: 'commit-short-id')
     end
   end
+
+  def truncate_sha(sha)
+    Commit.truncate_sha(sha)
+  end
 end
diff --git a/app/models/commit.rb b/app/models/commit.rb
index a1343b65c72..212229649fc 100644
--- a/app/models/commit.rb
+++ b/app/models/commit.rb
@@ -19,13 +19,24 @@ class Commit
 
   class << self
     def decorate(commits)
-      commits.map { |c| self.new(c) }
+      commits.map do |commit|
+        if commit.kind_of?(Commit)
+          commit
+        else
+          self.new(commit)
+        end
+      end
     end
 
     # Calculate number of lines to render for diffs
     def diff_line_count(diffs)
       diffs.reduce(0) { |sum, d| sum + d.diff.lines.count }
     end
+
+    # Truncate sha to 8 characters
+    def truncate_sha(sha)
+      sha[0..7]
+    end
   end
 
   attr_accessor :raw
@@ -111,7 +122,7 @@ class Commit
 
   # Mentionable override.
   def gfm_reference
-    "commit #{sha[0..5]}"
+    "commit #{id}"
   end
 
   def method_missing(m, *args, &block)
@@ -124,6 +135,11 @@ class Commit
     super
   end
 
+  # Truncate sha to 8 characters
+  def short_id
+    @raw.short_id(7)
+  end
+
   def parents
     @parents ||= Commit.decorate(super)
   end
diff --git a/app/models/event.rb b/app/models/event.rb
index 9e296c00281..c0b126713a6 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -266,7 +266,7 @@ class Event < ActiveRecord::Base
   end
 
   def note_short_commit_id
-    note_commit_id[0..8]
+    Commit.truncate_sha(note_commit_id)
   end
 
   def note_commit?
diff --git a/app/models/merge_request_diff.rb b/app/models/merge_request_diff.rb
index 409e82ed1ef..a71122d5e07 100644
--- a/app/models/merge_request_diff.rb
+++ b/app/models/merge_request_diff.rb
@@ -55,7 +55,7 @@ class MergeRequestDiff < ActiveRecord::Base
   end
 
   def last_commit_short_sha
-    @last_commit_short_sha ||= last_commit.sha[0..10]
+    @last_commit_short_sha ||= last_commit.short_id
   end
 
   private
diff --git a/app/models/repository.rb b/app/models/repository.rb
index 339e485e6d2..93994123a90 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -30,6 +30,8 @@ class Repository
     commit = Gitlab::Git::Commit.find(raw_repository, id)
     commit = Commit.new(commit) if commit
     commit
+  rescue Rugged::OdbError => ex
+    nil
   end
 
   def commits(ref, path = nil, limit = nil, offset = nil, skip_merges = false)
diff --git a/app/views/events/_commit.html.haml b/app/views/events/_commit.html.haml
index 0e03e116e7d..f0c34def145 100644
--- a/app/views/events/_commit.html.haml
+++ b/app/views/events/_commit.html.haml
@@ -1,5 +1,5 @@
 %li.commit
   .commit-row-title
-    = link_to commit[:id][0..8], project_commit_path(project, commit[:id]), class: "commit_short_id", alt: ''
+    = link_to truncate_sha(commit[:id]), project_commit_path(project, commit[:id]), class: "commit_short_id", alt: ''
     &nbsp;
     = gfm event_commit_title(commit[:message]), project
diff --git a/app/views/events/_event_push.atom.haml b/app/views/events/_event_push.atom.haml
index 17228c430ca..2b63519edac 100644
--- a/app/views/events/_event_push.atom.haml
+++ b/app/views/events/_event_push.atom.haml
@@ -2,7 +2,7 @@
   - event.commits.first(15).each do |commit|
     %p
       %strong= commit[:author][:name]
-      = link_to "(##{commit[:id][0...8]})", project_commit_path(event.project, id: commit[:id])
+      = link_to "(##{truncate_sha(commit[:id])})", project_commit_path(event.project, id: commit[:id])
       %i
         at
         = commit[:timestamp].to_time.to_s(:short)
diff --git a/app/views/events/event/_push.html.haml b/app/views/events/event/_push.html.haml
index 1bca64c7d50..b912b5e092f 100644
--- a/app/views/events/event/_push.html.haml
+++ b/app/views/events/event/_push.html.haml
@@ -22,4 +22,4 @@
           - if event.commits_count > 2
             %span ... and #{event.commits_count - 2} more commits.
           = link_to project_compare_path(event.project, from: event.commit_from, to: event.commit_to) do
-            %strong Compare &rarr; #{event.commit_from[0..7]}...#{event.commit_to[0..7]}
+            %strong Compare &rarr; #{truncate_sha(event.commit_from)}...#{truncate_sha(event.commit_to)}
diff --git a/app/views/projects/blame/show.html.haml b/app/views/projects/blame/show.html.haml
index e5cde488c3c..bdf02c6285d 100644
--- a/app/views/projects/blame/show.html.haml
+++ b/app/views/projects/blame/show.html.haml
@@ -15,7 +15,7 @@
           %tr
             %td.blame-commit
               %span.commit
-                = link_to commit.short_id(8), project_commit_path(@project, commit), class: "commit_short_id"
+                = link_to commit.short_id, project_commit_path(@project, commit), class: "commit_short_id"
                 &nbsp;
                 = commit_author_link(commit, avatar: true, size: 16)
                 &nbsp;
diff --git a/app/views/projects/commit/_commit_box.html.haml b/app/views/projects/commit/_commit_box.html.haml
index 0b6b6af4f90..e149f017f84 100644
--- a/app/views/projects/commit/_commit_box.html.haml
+++ b/app/views/projects/commit/_commit_box.html.haml
@@ -35,7 +35,7 @@
 .commit-info-row
   %span.cgray= pluralize(@commit.parents.count, "parent")
   - @commit.parents.each do |parent|
-    = link_to parent.id[0...10], project_commit_path(@project, parent)
+    = link_to parent.short_id, project_commit_path(@project, parent)
 
 - if @branches.any?
   .commit-info-row
diff --git a/app/views/projects/commits/_commit.html.haml b/app/views/projects/commits/_commit.html.haml
index 68852ba973f..1eb17f760dc 100644
--- a/app/views/projects/commits/_commit.html.haml
+++ b/app/views/projects/commits/_commit.html.haml
@@ -1,6 +1,6 @@
 %li.commit.js-toggle-container
   .commit-row-title
-    = link_to commit.short_id(8), project_commit_path(project, commit), class: "commit_short_id"
+    = link_to commit.short_id, project_commit_path(project, commit), class: "commit_short_id"
     &nbsp;
     %span.str-truncated
       = link_to_gfm commit.title, project_commit_path(project, commit.id), class: "commit-row-message"
diff --git a/app/views/projects/commits/_inline_commit.html.haml b/app/views/projects/commits/_inline_commit.html.haml
index b36369b4285..574599aa2d2 100644
--- a/app/views/projects/commits/_inline_commit.html.haml
+++ b/app/views/projects/commits/_inline_commit.html.haml
@@ -1,6 +1,6 @@
 %li.commit.inline-commit
   .commit-row-title
-    = link_to commit.short_id(8), project_commit_path(project, commit), class: "commit_short_id"
+    = link_to commit.short_id, project_commit_path(project, commit), class: "commit_short_id"
     &nbsp;
     %span.str-truncated
       = link_to_gfm commit.title, project_commit_path(project, commit.id), class: "commit-row-message"
diff --git a/app/views/projects/tree/_submodule_item.html.haml b/app/views/projects/tree/_submodule_item.html.haml
index a8ec9df2c8f..46e9be4af83 100644
--- a/app/views/projects/tree/_submodule_item.html.haml
+++ b/app/views/projects/tree/_submodule_item.html.haml
@@ -7,8 +7,8 @@
     @
     %span.monospace
       - if commit.nil?
-        #{submodule_item.id[0..10]}
+        #{truncate_sha(submodule_item.id)}
       - else
-        = link_to "#{submodule_item.id[0..10]}", commit
+        = link_to "#{truncate_sha(submodule_item.id)}", commit
   %td
   %td.hidden-xs
diff --git a/app/views/projects/wikis/history.html.haml b/app/views/projects/wikis/history.html.haml
index d3a66c48c9b..ef4b8f74714 100644
--- a/app/views/projects/wikis/history.html.haml
+++ b/app/views/projects/wikis/history.html.haml
@@ -17,7 +17,7 @@
       %tr
         %td
           = link_to project_wiki_path(@project, @page, version_id: commit.id) do
-            = commit.id[0..10]
+            = truncate_sha(commit.id)
         %td
           = commit.author.name
         %td
diff --git a/app/views/search/results/_note.html.haml b/app/views/search/results/_note.html.haml
index f2327cd69cc..a44a4542df5 100644
--- a/app/views/search/results/_note.html.haml
+++ b/app/views/search/results/_note.html.haml
@@ -10,7 +10,7 @@
         = project.name_with_namespace
       &middot;
       = link_to project_commit_path(project, note.commit_id, anchor: dom_id(note)) do
-        Commit #{note.commit_id[0..8]}
+        Commit #{truncate_sha(note.commit_id)}
     - else
       = link_to project do
         = project.name_with_namespace