Fix MR pipelines not having build and test jobs

.gitlab-ci.yml

@@ -56,21 +56,24 @@ check-changelog:
     - apk add git
     - sh ./tools/check-changelog
 
-build:
+.build_changes_policy:
-  stage: build
+  rules:
-  only:
+    - changes:
-    changes: &build_changes_policy
         - ".gitlab-ci.yml"
         - "**/*.ex"
         - "**/*.exs"
         - "mix.lock"
+
+build:
+  extends: .build_changes_policy
+  stage: build
   script:
   - mix compile --force
 
 spec-build:
   stage: test
-  only:
+  rules:
-    changes:
+    - changes:
         - ".gitlab-ci.yml"
         - "lib/pleroma/web/api_spec/**/*.ex"
         - "lib/pleroma/web/api_spec.ex"
@@ -95,9 +98,8 @@ benchmark:
     - mix pleroma.load_testing
 
 unit-testing:
+  extends: .build_changes_policy
   stage: test
-  only:
-    changes: *build_changes_policy
   cache: &testing_cache_policy
     <<: *global_cache_policy
     policy: pull
@@ -118,11 +120,10 @@ unit-testing:
         path: coverage.xml
 
 unit-testing-erratic:
+  extends: .build_changes_policy
   stage: test
   retry: 2
   allow_failure: true
-  only:
-    changes: *build_changes_policy
   cache: &testing_cache_policy
     <<: *global_cache_policy
     policy: pull
@@ -153,9 +154,8 @@ unit-testing-erratic:
 #     - mix test --trace --only federated
 
 unit-testing-rum:
+  extends: .build_changes_policy
   stage: test
-  only:
-    changes: *build_changes_policy
   cache: *testing_cache_policy
   services:
   - name: minibikini/postgres-with-rum:12
@@ -171,10 +171,9 @@ unit-testing-rum:
     - mix test --preload-modules
 
 lint:
+  extends: .build_changes_policy
   image: &current_elixir elixir:1.12-alpine
   stage: test
-  only:
-    changes: *build_changes_policy
   cache: *testing_cache_policy
   before_script: &current_bfr_script
     - apk update
@@ -186,18 +185,16 @@ lint:
     - mix format --check-formatted
 
 analysis:
+  extends: .build_changes_policy
   stage: test
-  only:
-    changes: *build_changes_policy
   cache: *testing_cache_policy
   script:
     - mix credo --strict --only=warnings,todo,fixme,consistency,readability
 
 cycles:
+  extends: .build_changes_policy
   image: *current_elixir
   stage: test
-  only:
-    changes: *build_changes_policy
   cache: {}
   before_script: *current_bfr_script
   script: