feat: add npm diffruyadorno/npm-diff

- As proposed in RFC: https://github.com/npm/rfcs/pull/144

PR-URL: https://github.com/npm/cli/pull/1319
Credit: @ruyadorno
Close: #1319
Reviewed-by: @isaacs

3 files changed, 53 insertions, 0 deletions

diff --git a/tap-snapshots/test-lib-utils-cmd-list.js-TAP.test.js b/tap-snapshots/test-lib-utils-cmd-list.js-TAP.test.js
index 68f0d8328..1c91975c7 100644
--- a/tap-snapshots/test-lib-utils-cmd-list.js-TAP.test.js
+++ b/tap-snapshots/test-lib-utils-cmd-list.js-TAP.test.js
@@ -155,6 +155,7 @@ Object {
     "prefix",
     "bin",
     "whoami",
+    "diff",
     "dist-tag",
     "ping",
     "test",
diff --git a/tap-snapshots/test-lib-utils-config.js-TAP.test.js b/tap-snapshots/test-lib-utils-config.js-TAP.test.js
index 1f525e71c..39927e600 100644
--- a/tap-snapshots/test-lib-utils-config.js-TAP.test.js
+++ b/tap-snapshots/test-lib-utils-config.js-TAP.test.js
@@ -37,6 +37,14 @@ Object {
     "depth": null,
     "description": true,
     "dev": false,
+    "diff": Array [],
+    "diff-dst-prefix": "",
+    "diff-ignore-all-space": false,
+    "diff-name-only": false,
+    "diff-no-prefix": false,
+    "diff-src-prefix": "",
+    "diff-text": false,
+    "diff-unified": null,
     "dry-run": false,
     "editor": "vim",
     "engine-strict": false,
@@ -346,6 +354,20 @@ Object {
     ],
     "description": "{Boolean TYPE}",
     "dev": "{Boolean TYPE}",
+    "diff": Array [
+      "{String TYPE}",
+      "{Array TYPE}",
+    ],
+    "diff-dst-prefix": "{String TYPE}",
+    "diff-ignore-all-space": "{Boolean TYPE}",
+    "diff-name-only": "{Boolean TYPE}",
+    "diff-no-prefix": "{Boolean TYPE}",
+    "diff-src-prefix": "{String TYPE}",
+    "diff-text": "{Boolean TYPE}",
+    "diff-unified": Array [
+      null,
+      "{Number TYPE}",
+    ],
     "dry-run": "{Boolean TYPE}",
     "editor": "{String TYPE}",
     "engine-strict": "{Boolean TYPE}",
@@ -566,6 +588,14 @@ Object {
     "depth": null,
     "description": true,
     "dev": false,
+    "diff": Array [],
+    "diff-dst-prefix": "",
+    "diff-ignore-all-space": false,
+    "diff-name-only": false,
+    "diff-no-prefix": false,
+    "diff-src-prefix": "",
+    "diff-text": false,
+    "diff-unified": null,
     "dry-run": false,
     "editor": "vim",
     "engine-strict": false,
@@ -875,6 +905,20 @@ Object {
     ],
     "description": "{Boolean TYPE}",
     "dev": "{Boolean TYPE}",
+    "diff": Array [
+      "{String TYPE}",
+      "{Array TYPE}",
+    ],
+    "diff-dst-prefix": "{String TYPE}",
+    "diff-ignore-all-space": "{Boolean TYPE}",
+    "diff-name-only": "{Boolean TYPE}",
+    "diff-no-prefix": "{Boolean TYPE}",
+    "diff-src-prefix": "{String TYPE}",
+    "diff-text": "{Boolean TYPE}",
+    "diff-unified": Array [
+      null,
+      "{Number TYPE}",
+    ],
     "dry-run": "{Boolean TYPE}",
     "editor": "{String TYPE}",
     "engine-strict": "{Boolean TYPE}",
diff --git a/tap-snapshots/test-lib-utils-flat-options.js-TAP.test.js b/tap-snapshots/test-lib-utils-flat-options.js-TAP.test.js
index 93606fcd8..47de89e97 100644
--- a/tap-snapshots/test-lib-utils-flat-options.js-TAP.test.js
+++ b/tap-snapshots/test-lib-utils-flat-options.js-TAP.test.js
@@ -30,6 +30,14 @@ Object {
   "commitHooks": "commit-hooks",
   "defaultTag": "tag",
   "depth": "depth",
+  "diff": undefined,
+  "diffDstPrefix": undefined,
+  "diffIgnoreAllSpace": undefined,
+  "diffNameOnly": undefined,
+  "diffNoPrefix": undefined,
+  "diffSrcPrefix": undefined,
+  "diffText": undefined,
+  "diffUnified": undefined,
   "dmode": 511,
   "dryRun": "dry-run",
   "editor": "editor",