chore(travis): add commitplease validation to ci-checks

This will provide feedback to contributors without getting in the way of writing invalid commit messages locally. 

The git hook integration is turned off.

Committers who push directly to the repo can be expected to use correct commit messages ;) Most changes go through PRs anyway.

Note that "Merge commit" messages and everything starting with "WIP" is always allowed by commitplease. Follow issue https://github.com/jzaefferer/commitplease/issues/101 for more info.

Related to #14888 
Closes #16097

package.json

@@ -30,6 +30,7 @@
     "changez-angular": "^2.1.2",
     "cheerio": "^0.17.0",
     "commitizen": "^2.3.0",
+    "commitplease": "^2.7.10",
     "cross-spawn": "^4.0.0",
     "cz-conventional-changelog": "1.1.4",
     "dgeni": "^0.4.0",
@@ -95,9 +96,13 @@
     "stringmap": "^0.2.2"
   },
   "dependencies": {},
+  "commitplease": {
+    "style": "angular",
+    "nohook": true
+  },
   "config": {
     "commitizen": {
       "path": "node_modules/cz-conventional-changelog"
     }
   }
-}
+}

scripts/travis/build.sh

@@ -7,6 +7,13 @@ export SAUCE_ACCESS_KEY=`echo $SAUCE_ACCESS_KEY | rev`
 
 if [ "$JOB" == "ci-checks" ]; then
   grunt ci-checks
+  if [[ $TRAVIS_PULL_REQUEST != 'false' ]]; then
+    # validate commit messages of all commits in the PR
+    # convert commit range to 2 dots, as commitplease uses `git log`.
+    # See https://github.com/travis-ci/travis-ci/issues/4596 for more info
+    echo "Validate commit messages in PR."
+    yarn run commitplease -- "${TRAVIS_COMMIT_RANGE/.../..}"
+  fi
 elif [ "$JOB" == "unit" ]; then
   if [ "$BROWSER_PROVIDER" == "browserstack" ]; then
     BROWSERS="BS_Chrome,BS_Safari,BS_Firefox,BS_IE_9,BS_IE_10,BS_IE_11,BS_EDGE,BS_iOS_8,BS_iOS_9"

yarn.lock

@@ -1166,6 +1166,16 @@ commitizen@^2.3.0:
     shelljs "0.7.5"
     strip-json-comments "2.0.1"
 
+commitplease@^2.7.10:
+  version "2.7.10"
+  resolved "https://registry.yarnpkg.com/commitplease/-/commitplease-2.7.10.tgz#129af5abb365b46f25e652020c5d1548c947f163"
+  dependencies:
+    chalk "^1.1.1"
+    git-tools "^0.2.1"
+    ini "^1.3.4"
+    object-assign "^4.1.0"
+    semver "^5.1.0"
+
 commondir@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/commondir/-/commondir-0.0.1.tgz#89f00fdcd51b519c578733fec563e6a6da7f5be2"
@@ -2475,6 +2485,12 @@ getpass@^0.1.1:
   dependencies:
     assert-plus "^1.0.0"
 
+git-tools@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/git-tools/-/git-tools-0.2.1.tgz#6e1846af2c0e91ab59258b48f9b53c1279b3b273"
+  dependencies:
+    spawnback "~1.0.0"
+
 glob-base@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/glob-base/-/glob-base-0.3.0.tgz#dbb164f6221b1c0b1ccf82aea328b497df0ea3c4"
@@ -5912,6 +5928,10 @@ spawn-sync@^1.0.15:
     concat-stream "^1.4.7"
     os-shim "^0.1.2"
 
+spawnback@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/spawnback/-/spawnback-1.0.0.tgz#f73662f7e54d95367eca74d6426c677dd7ea686f"
+
 spdx-correct@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-1.0.2.tgz#4b3073d933ff51f3912f03ac5519498a4150db40"