Refactor GitLab pipeline

update submodules:

  stage: build

  except:

    - pushes

.git:

  image:

    name: alpine/git

    entrypoint: [""]

  before_script:

    - git config user.name "${GITLAB_USER_NAME}"

    - git config user.email "${GITLAB_USER_EMAIL}"

  script:

    - |

      git submodule foreach --recursive '

        branch=`git config -f ~/.gitmodules submodule.${name}.branch`;

        git checkout origin/${branch:-HEAD} || exit 1

        (cd ${toplevel}; exec git add ${path})

      '

    - |

      git diff --cached --no-patch --exit-code ||

      git commit -m "

      Update submodules

      `git status --short -uno`

      MSG_FOOTER="

      Automatically generated:

        source: Gitlab CI

        runner: ${CI_RUNNER_DESCRIPTION} (${CI_RUNNER_VERSION})

        job:    ${CI_JOB_URL} (#${CI_JOB_ID})

        time:   `date`

      "

    - |

      git_commit() {

        while test "$1"; do

          case $1 in

            --) shift; MSG=`printf '%s\n\n' "$@" "$MSG_FOOTER"`; break ;;

            *) CHK="$CHK $1"; shift ;;

          esac

        done

        git diff --no-patch --exit-code $CHK ||

        git commit -m "$MSG"

      }

  after_script:

    - git push

      ${CI_PROJECT_URL/:\/\//:\/\/gitlab-ci-token:${PUSH_TOKEN?PUSH_TOKEN must be defined and allowed for ${CI_COMMIT_REF_NAME}}@}

      HEAD:${CI_COMMIT_REF_NAME}

stages:

  - submodules

workflow:

  rules:

  - if: $CI_PIPELINE_SOURCE != "push"

Update Submodules:

  stage: submodules

  extends: [.git]

  script:

    - |

      git submodule foreach --recursive '

        branch=`git config -f ~/.gitmodules submodule.${name}.branch`;

        git checkout origin/${branch:-HEAD} || exit 1

        (cd ${toplevel}; exec git add ${path})

      '

    - git_commit --cached -- "Update submodules" "`git status --short -uno`"