metadata-docs.yml

# This GH action has the goal to fetch the pattern-metadata.yaml file (if existing)
# and output all of its flattened yaml structure into asciidoc variables for the pattern
# 
# It needs a secret called DOCS_TOKEN to be set in the pattern's repository
# that calls this GH action. It has to be  a PAT token with the following
# permissions on the `validatedpatterns/docs` repository
# * Read access to actions and metadata
# * Read and Write access to code and pull requests
#
# This job will checkout the docs repo and propose a PR to where it updates
# the file ./modules/<pattern>/metadata-<pattern>.yaml where the pattern's
# metadata will land transformed into asciidoc variables.
#
# Note: This action is to be imported from a pattern and not used in the docs repo
# itself. We maintain it in the docs repo in order to make it easier to have a single
# workflow across all patterns
---
name: Update docs from pattern's metadata

on:
  workflow_call:
    secrets:
      DOCS_TOKEN:
        required: false
        description: The token used to create a PR in the docs repository
    inputs:
      DOCS_BRANCH:
        description: "Branch of the docs git repo to use"
        required: false
        type: string
        default: "main"

env:
  DOCS_DIR: docs
  PATTERN_DIR: pattern
  METADATA: pattern-metadata.yaml
  GIT_EMAIL: vp-team@redhat.com
  GIT_USER: Github Actions

jobs:
  docs-push:
    # We do not want to run this job on forked repositories
    if: |
      github.repository_owner == 'validatedpatterns' ||
      github.repository_owner == 'validatedpatterns-sandbox' ||
      github.repository_owner == 'validatedpatterns-demos'
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      id-token: write

    steps:
      - name: Checkout pattern repository
        uses: actions/checkout@v4
        with:
          path: ${{ env.PATTERN_DIR }}

      - name: Fail if this repository is different than the one in metadata
        run: |-
          set -e
          repo=$(yq -r .repo_url "${{ env.METADATA }}")
          full_url="https://github.com/${{ github.repository }}"
          if [ "${full_url}" != "${repo}" ]; then
            echo "Error ${{ github.repository }} != ${full_url}"
            exit 1
          fi
          docs_repo=$(yq -r .docs_repo_url "${{ env.METADATA }}" | sed -e 's%https://github.com/%%')
          pattern=$(yq -r .name "${{ env.METADATA }}")
          {
            echo "DOCS_PR_BRANCH=sizing-pr-${pattern}"
            echo "DOCS_REPO=${docs_repo}"
            echo "PATTERN=${pattern}"
          } >> "${GITHUB_ENV}"
        working-directory: ${{ env.PATTERN_DIR }}

      - name: Checkout docs repository
        uses: actions/checkout@v4
        with:
          path: ${{ env.DOCS_DIR }}
          repository: ${{ env.DOCS_REPO }}
          ref: ${{ inputs.DOCS_BRANCH }}
          token: ${{ secrets.DOCS_TOKEN }}

      - name: Template the cluster variables on to the patterns-variables .adoc file
        run: |-
          set -e
          mkdir -p "${{ env.DOCS_DIR }}/modules/${{ env.PATTERN }}"
          ./${{ env.DOCS_DIR }}/utils/flatten_yaml.rb \
              ./${{ env.PATTERN_DIR }}/${{ env.METADATA }} | \
              tee "${{ env.DOCS_DIR }}/modules/${{ env.PATTERN }}/metadata-${{ env.PATTERN }}.adoc"

      - name: Push to docs git repo
        run: |-
          set -e
          git config --global user.email "${{ env.GIT_EMAIL }}"
          git config --global user.name "${{ env.GIT_USER }}"
          git checkout -B "${{ env.DOCS_PR_BRANCH }}" "${{ inputs.DOCS_BRANCH }}"
          git add modules/${{ env.PATTERN }}/metadata-${{ env.PATTERN }}.adoc
          git commit -m "Update cluster variables for ${{ env.PATTERN }}" || (echo "Nothing to commit"; exit 0)
          git push origin "${{ env.DOCS_PR_BRANCH }}" -f
          gh pr create -B "${{ inputs.DOCS_BRANCH }}" -H "${{ env.DOCS_PR_BRANCH }}" \
            --title 'Merge cluster variables change for ${{ env.PATTERN }}' --body 'Created by Github action' || \
          gh pr edit -B "${{ inputs.DOCS_BRANCH }}" --title 'Cluster variables change for ${{ env.PATTERN }}' --body 'Created by Github action'
        working-directory: ${{ env.DOCS_DIR }}
        env:
          GITHUB_TOKEN: ${{ secrets.DOCS_TOKEN }}