ci: make update-from-upstream job rebase on upstream release

  image: registry.gitlab.e.foundation/e/tools/docker-tools:latest

  stage: update-from-upstream

  rules:

    - if: '$CI_PIPELINE_SOURCE == "schedule" && $CI_COMMIT_REF_NAME == $LOCAL_BRANCH'

    - if: '$CI_PIPELINE_SOURCE == "schedule" && $CI_COMMIT_REF_NAME == "develop-rebased"'

  variables:

    CI_PROJECT_SSH_URL: git@gitlab.e.foundation:$CI_PROJECT_PATH

    GIT_STRATEGY: none

    - git clone $CI_PROJECT_SSH_URL $CI_PROJECT_DIR

    - cd $CI_PROJECT_DIR

  script:

    # update $UPSTREAM_BRANCH & tags

    - git fetch origin

    - git checkout $UPSTREAM_BRANCH

    # Rebase local branch on upstream default branch.

    - git remote add upstream $UPSTREAM_URL

    - git fetch upstream

    - git pull upstream $UPSTREAM_DEFAULT_BRANCH

    - git push origin $UPSTREAM_BRANCH

    - git push origin --tags

    # checkout to latest tag commit to $TEMP_LATEST_TAG_BRANCH

    - git checkout $(git describe --tags --abbrev=0)

    - git checkout -b $TEMP_LATEST_TAG_BRANCH

    # merge $LOCAL_BRANCH with $TEMP_LATEST_TAG_BRANCH & push

    - git fetch origin --prune

    - git fetch upstream --prune --no-tags

    - git checkout $LOCAL_BRANCH

    - git merge $TEMP_LATEST_TAG_BRANCH

    - git push origin $LOCAL_BRANCH

    # remove unwanted local branch & remote

    - git branch -D $TEMP_LATEST_TAG_BRANCH

    - git remote remove upstream

    - git rebase upstream/$UPSTREAM_DEFAULT_BRANCH

    - git push origin $LOCAL_BRANCH -f

update-default-branch:

  extends: .update-from-upstream

  variables:

    LOCAL_BRANCH: develop

    UPSTREAM_BRANCH: upstream/release

    LOCAL_BRANCH: develop-rebased

    UPSTREAM_DEFAULT_BRANCH: release

    UPSTREAM_URL: https://github.com/thunderbird/thunderbird-android

    TEMP_LATEST_TAG_BRANCH: latest_upstream_tag_branch