internal: add stage for automatic change propagation to main

.gitlab-ci.yml

@@ -2,11 +2,14 @@ image: python:3.10-bullseye
 
 variables:
   GIT_SUBMODULE_STRATEGY: normal
+  PREFERRED_BRANCH: "citadel"  # Change this to your actual release branch name
+  MAIN_BRANCH: "main"
 
 stages:
   - setup
   - build
   - deploy
+  - copy_to_main
 
 default:
   tags:
@@ -41,3 +44,51 @@ pages:
       - public
   only:
     - citadel
+
+copy_to_main:
+  stage: copy_to_main
+  variables:
+    GIT_DEPTH: "0"
+  script:
+    - git config --global user.email "ci@gitlab.com"
+    - git config --global user.name "CI Bot"
+    - git config pull.rebase true
+
+    - export COMMIT_NAME=$(git log --no-merges -1 --pretty=format:%s)
+    - export COMMIT_HASH=$(git log --no-merges -1 --pretty=format:%h)
+    - export COPY_BRANCH="COPY-${COMMIT_HASH}"
+
+    # Checkout main and create a new branch
+    - git fetch origin
+    - git checkout $MAIN_BRANCH
+    - git pull origin $MAIN_BRANCH
+    - git checkout -b $COPY_BRANCH
+
+    # Cherry-pick the commit that triggered the pipeline
+    - git cherry-pick -m 1 $COMMIT_HASH || echo "Cherry-pick failed. Manual resolution needed." > cherry_pick_failed
+
+    # Push the branch
+    - git push https://oauth2:${GITLAB_TOKEN}@gitlab.fi.muni.cz/${CI_PROJECT_PATH}.git HEAD:"$COPY_BRANCH"
+
+    # Create Merge Request
+    - |
+      if [ -f cherry_pick_failed ]; then
+        DESCRIPTION="**Cherry-pick failed. Manual resolution needed. Commit: ${COMMIT_HASH}**."
+      else
+        DESCRIPTION="**Cherry-pick applied successfully. Commit: ${COMMIT_NAME} (hash: ${COMMIT_HASH}) applied to main.**"
+      fi
+
+      curl --request POST --header "PRIVATE-TOKEN: $GITLAB_TOKEN" \
+        --data "source_branch=$COPY_BRANCH" \
+        --data "target_branch=$MAIN_BRANCH" \
+        --data "title=[COPY]-${COMMIT_NAME}" \
+        --data "description=$DESCRIPTION" \
+        --data "remove_source_branch=true" \
+        --data "squash=true" \
+        "https://gitlab.fi.muni.cz/api/v4/projects/$CI_PROJECT_ID/merge_requests" \
+        > /dev/null
+  rules: 
+    - if: $CI_COMMIT_BRANCH == $PREFERRED_BRANCH
+      when: manual
+  dependencies:
+    - build