# Autogenerate the API docs on new commit to important branches
# Also work as a check for PR's to not forget committing their doc changes
# called from api-docs-check.yml
name: Autogenerate API docs
on:
  push:
    paths:
      - 'src/nvim/api/*.[ch]'
      - 'runtime/lua/**.lua'
      - 'runtime/doc/**'
    branches:
      - 'master'
      - 'release-[0-9]+.[0-9]+'
  workflow_dispatch:
  workflow_call:
    inputs:
      check_only:
        type: boolean
        default: false
        required: false

jobs:
  regen-api-docs:
    runs-on: ubuntu-22.04
    permissions:
      contents: write
      pull-requests: write
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
      - uses: actions/checkout@v3
        with:
          # Fetch depth 0 is required if called through workflow_call. In order
          # to create a PR we need to access other branches, which requires a
          # full clone.
          fetch-depth: 0

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo env DEBIAN_FRONTEND=noninteractive apt-get install -y doxygen python3 python3-msgpack luajit

      - name: Setup git config
        run: |
          git config --global user.name 'marvim'
          git config --global user.email 'marvim@users.noreply.github.com'

      - run: printf 'DOC_BRANCH=marvim/api-doc-update/%s\n' ${GITHUB_REF#refs/heads/} >> $GITHUB_ENV

      - name: Generate docs
        id: docs
        run: |
          git checkout -b ${DOC_BRANCH}
          python3 scripts/gen_vimdoc.py
          printf '::set-output name=UPDATED_DOCS::%s\n' $([ -z "$(git diff)" ]; echo $?)

      - name: FAIL, PR has not committed doc changes
        if: ${{ steps.docs.outputs.UPDATED_DOCS != 0 && inputs.check_only }}
        run: |
          echo "Job failed, run ./scripts/gen_vimdoc.py and commit your doc changes"
          echo "The doc generation produces the following changes:"
          git diff --color --exit-code

      - name: Automatic PR
        if: ${{ steps.docs.outputs.UPDATED_DOCS != 0 && !inputs.check_only }}
        run: |
          git add -u
          git commit -m 'docs: regenerate [skip ci]'
          git push --force https://${GITHUB_ACTOR}:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY} ${DOC_BRANCH}
          gh pr create --draft --fill --base ${GITHUB_REF#refs/heads/} --head ${DOC_BRANCH} || true