name: Sync OpenAPI schema

# **What it does**: Once a day, this workflow syncs the REST, Webhooks, and GitHub Apps automated pipelines with the github/rest-api-description repository, and creates a pull request if there are updates to any of the data files we generate from the OpenAPI.
# **Why we have it**: So we can automate updates to REST, Webhooks, and GitHub Apps documentation
# **Who does it impact**: Anyone making OpenAPI changes in `github/github`, and wanting to get them published on the docs site.

on:
  workflow_dispatch:
    inputs:
      SOURCE_BRANCH:
        description: 'Branch to pull the dereferenced OpenAPI source files from in the github/rest-api-descriptions repo.'
        type: string
        required: true
        default: 'main'
  schedule:
    - cron: '20 16 * * *' # Run every day at 16:20 UTC / 8:20 PST

permissions:
  contents: write
  pull-requests: write

# This allows a subsequently queued workflow run to interrupt previous runs
concurrency:
  group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label || github.head_ref || github.ref }}'
  cancel-in-progress: true

jobs:
  generate-decorated-files:
    if: github.repository == 'github/docs-internal'
    runs-on: ubuntu-20.04-xl
    steps:
      - name: Checkout repository code
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

        # Check out a nested repository inside of previous checkout
      - name: Checkout rest-api-description repo
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
        with:
          # By default, only the most recent commit of the `main` branch
          # will be checked out
          repository: github/rest-api-description
          path: rest-api-description
          ref: ${{ inputs.SOURCE_BRANCH }}

      - uses: ./.github/actions/node-npm-setup

      - name: Sync the REST, Webhooks, and GitHub Apps schemas
        env:
          # Needed for gh
          GITHUB_TOKEN: ${{ secrets.DOCS_BOT_PAT_BASE }}
        run: |
          npm run sync-rest -- --source-repo rest-api-description --output rest github-apps webhooks rest-redirects
          git status
          echo "Deleting the cloned github/rest-api-description repo..."
          rm -rf rest-api-description

      - name: Get the rest-api-description SHA being synced
        id: rest-api-description
        run: |
          OPENAPI_COMMIT_SHA=$(cat src/rest/lib/config.json | jq -r '.sha')
          echo "OPENAPI_COMMIT_SHA=$OPENAPI_COMMIT_SHA" >> $GITHUB_OUTPUT
          echo "Copied files from github/rest-api-description repo. Commit SHA: $OPENAPI_COMMIT_SHA"
          if [ -z $OPENAPI_COMMIT_SHA ]; then
            echo "OpenAPI commit SHA is empty!"
            exit 1
          fi

      - name: Create pull request
        env:
          # Needed for gh
          GITHUB_TOKEN: ${{ secrets.DOCS_BOT_PAT_BASE }}
        run: |
          # If nothing to commit, exit now. It's fine. No orphans.
          changes=$(git diff --name-only | wc -l)
          if [[ $changes -eq 0 ]]; then
            echo "There are no changes to commit after running `npm run sync-rest` Exiting..."
            exit 0
          fi

          git config --global user.name "docs-bot"
          git config --global user.email "77750099+docs-bot@users.noreply.github.com"

          branchname=openapi-update-${{ steps.rest-api-description.outputs.OPENAPI_COMMIT_SHA }}

          remotesha=$(git ls-remote --heads origin $branchname)
          if [ -n "$remotesha" ]; then
            # output is not empty, it means the remote branch exists
            echo "Branch $branchname already exists in 'github/docs-internal'. Exiting..."
            exit 0
          fi

          git checkout -b $branchname
          git add .
          git commit -m "Add decorated OpenAPI schema files"
          git push origin $branchname

          echo "Creating pull request..."
          gh pr create \
            --title "Update OpenAPI Description" \
            --body '👋 humans. This PR updates the OpenAPI description with the latest changes. (Synced from github/rest-api-description@${{ steps.rest-api-description.outputs.OPENAPI_COMMIT_SHA }})

            If CI does not pass or other problems arise, contact #docs-engineering on slack.' \
            --repo github/docs-internal \
            --label github-openapi-bot \
            --head=$branchname \

      - uses: ./.github/actions/slack-alert
        if: ${{ failure() && github.event_name != 'workflow_dispatch' }}
        with:
          slack_channel_id: ${{ secrets.DOCS_ALERTS_SLACK_CHANNEL_ID }}
          slack_token: ${{ secrets.SLACK_DOCS_BOT_TOKEN }}