Fix MySQL CI jobs

[run mysql]
Signed-off-by: Rémy Coutable <remy@rymai.me>

.gitlab/ci/rails.gitlab-ci.yml

@@ -188,6 +188,27 @@ rspec system mysql:
   <<: *only-schedules-master
   parallel: 24
 
+.rspec-mysql-on-demand: &rspec-mysql-on-demand
+  only:
+    variables:
+      - $CI_COMMIT_MESSAGE =~ /\[run mysql\]/i
+      - $CI_COMMIT_REF_NAME =~ /mysql/
+
+rspec unit mysql on-demand:
+  <<: *rspec-metadata-mysql
+  <<: *rspec-mysql-on-demand
+  parallel: 20
+
+rspec integration mysql on-demand:
+  <<: *rspec-metadata-mysql
+  <<: *rspec-mysql-on-demand
+  parallel: 6
+
+rspec system mysql on-demand:
+  <<: *rspec-metadata-mysql
+  <<: *rspec-mysql-on-demand
+  parallel: 24
+
 rspec-fast-spec-helper:
   <<: *rspec-metadata-pg
   script:
@@ -200,14 +221,15 @@ rspec-fast-spec-helper:
     - scripts/gitaly-test-spawn
     - bin/rspec --color --format documentation --tag quarantine -- spec/
 
-rspec-pg-quarantine:
+rspec quarantine pg:
   <<: *rspec-metadata-pg
   <<: *rspec-quarantine
   allow_failure: true
 
-rspec-mysql-quarantine:
+rspec quarantine mysql:
   <<: *rspec-metadata-mysql
   <<: *rspec-quarantine
+  <<: *only-schedules-master
   allow_failure: true
 
 static-analysis:

scripts/prepare_build.sh

@@ -17,12 +17,10 @@ cp config/gitlab.yml.example config/gitlab.yml
 sed -i 's/bin_path: \/usr\/bin\/git/bin_path: \/usr\/local\/bin\/git/' config/gitlab.yml
 
 # Determine the database by looking at the job name.
-# For example, we'll get pg if the job is `rspec-pg 19 20`
-export GITLAB_DATABASE=$(echo $CI_JOB_NAME | cut -f1 -d' ' | cut -f2 -d-)
-
-# This would make the default database postgresql, and we could also use
-# pg to mean postgresql.
-if [ "$GITLAB_DATABASE" != 'mysql' ]; then
+# This would make the default database postgresql.
+if [[ "${CI_JOB_NAME#*mysql}" != "$CI_JOB_NAME" ]]; then
+  export GITLAB_DATABASE='mysql'
+else
   export GITLAB_DATABASE='postgresql'
 fi