Fix Slack link when on notify

.gitlab-ci.yml

@@ -211,7 +211,7 @@ rake ee_compat_check:
       - ee_compat_check/repo/
       - vendor/ruby
   artifacts:
-    name: "${CI_JOB_NAME}_${CI_COMIT_REF_NAME}_${CI_COMMIT_REF}"
+    name: "${CI_JOB_NAME}_${CI_COMIT_REF_NAME}_${CI_COMMIT_SHA}"
     when: on_failure
     expire_in: 10d
     paths:
@@ -330,7 +330,7 @@ migration paths:
     - sed -i 's/localhost/redis/g' config/resque.yml
     - bundle install --without postgres production --jobs $(nproc) $FLAGS --retry=3
     - bundle exec rake db:drop db:create db:schema:load db:seed_fu
-    - git checkout $CI_COMMIT_REF
+    - git checkout $CI_COMMIT_SHA
     - source scripts/prepare_build.sh
     - bundle exec rake db:migrate
 
@@ -394,7 +394,6 @@ trigger_docs:
     - master@gitlab-org/gitlab-ce
 
 # Notify slack in the end
-
 notify:slack:
   stage: post-test
   <<: *dedicated-runner
@@ -402,7 +401,7 @@ notify:slack:
     SETUP_DB: "false"
     USE_BUNDLE_INSTALL: "false"
   script:
-    - ./scripts/notify_slack.sh "#development" "Build on \`$CI_COMMIT_REF_NAME\` failed! Commit \`$(git log -1 --oneline)\` See <https://gitlab.com/gitlab-org/$(basename "$PWD")/commit/"$CI_COMMIT_REF"/pipelines>"
+    - ./scripts/notify_slack.sh "#development" "Build on \`$CI_COMMIT_REF_NAME\` failed! Commit \`$(git log -1 --oneline)\` See <https://gitlab.com/gitlab-org/$(basename "$PWD")/commit/"$CI_COMMIT_SHA"/pipelines>"
   when: on_failure
   only:
     - master@gitlab-org/gitlab-ce

doc/ci/variables/README.md

@@ -236,8 +236,8 @@ Running on runner-8a2f473d-project-1796893-concurrent-0 via runner-8a2f473d-mach
 ++ CI=true
 ++ export CI_DEBUG_TRACE=false
 ++ CI_DEBUG_TRACE=false
-++ export CI_COMMIT_REF=dd648b2e48ce6518303b0bb580b2ee32fadaf045
-++ CI_COMMIT_REF=dd648b2e48ce6518303b0bb580b2ee32fadaf045
+++ export CI_COMMIT_SHA=dd648b2e48ce6518303b0bb580b2ee32fadaf045
+++ CI_COMMIT_SHA=dd648b2e48ce6518303b0bb580b2ee32fadaf045
 ++ export CI_COMMIT_BEFORE_SHA=dd648b2e48ce6518303b0bb580b2ee32fadaf045
 ++ CI_COMMIT_BEFORE_SHA=dd648b2e48ce6518303b0bb580b2ee32fadaf045
 ++ export CI_COMMIT_REF_NAME=master