name: Sync examples

on:
  workflow_dispatch:
    inputs:
      skip-unchanged-check:
        type: boolean
        default: false
      dry-run:
        type: boolean
        default: false
  push:
    branches:
      - main

# Automatically cancel in-progress actions on the same branch
concurrency:
  group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && github.head_ref || github.ref }}
  cancel-in-progress: true

permissions:
  # Allow auto-branch-sync-action to git push
  contents: write

jobs:
  sync:
    name: Sync branches
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 2 # fetch 2 to compare with previous commit for changes

      - name: Detect changesets
        uses: bluwy/detect-changesets-action@v1
        id: detect

      # We only do sync if there are no changesets, so we don't accidentally allow users
      # to clone examples that may rely on unreleased code

      - name: Sync from main branch to latest and examples/* branches
        if: steps.detect.outputs.has-changesets == 'false' && github.ref == 'refs/heads/main'
        uses: bluwy/auto-branch-sync-action@v1
        with:
          map: |
            / -> latest
            /examples/* -> examples/*
          skip-unchanged-check: ${{ inputs.skip-unchanged-check == true }}
          dry-run: ${{ inputs.dry-run == true }}

      - name: Check .changeset/pre.json for matching tag
        if: steps.detect.outputs.has-changesets == 'false' && github.ref == 'refs/heads/next'
        id: check-pre-mode
        run: |
          if [ -f ./.changeset/pre.json ]; then
            if grep -q '"tag": "alpha"' ./.changeset/pre.json; then
              echo "alpha=true" >> $GITHUB_OUTPUT
            elif grep -q '"tag": "beta"' ./.changeset/pre.json; then
              echo "beta=true" >> $GITHUB_OUTPUT
            elif grep -q '"tag": "rc"' ./.changeset/pre.json; then
              echo "rc=true" >> $GITHUB_OUTPUT
            fi
          fi

      - name: Sync from next branch to alpha branch
        if: steps.detect.outputs.has-changesets == 'false' && steps.check-pre-mode.outputs.alpha == 'true'
        uses: bluwy/auto-branch-sync-action@v1
        with:
          map: / -> alpha
          skip-unchanged-check: ${{ inputs.skip-unchanged-check == true }}
          dry-run: ${{ inputs.dry-run == true }}

      - name: Sync from next branch to beta branch
        if: steps.detect.outputs.has-changesets == 'false' && steps.check-pre-mode.outputs.beta == 'true'
        uses: bluwy/auto-branch-sync-action@v1
        with:
          map: / -> beta
          skip-unchanged-check: ${{ inputs.skip-unchanged-check == true }}
          dry-run: ${{ inputs.dry-run == true }}

      - name: Sync from next branch to rc branch
        if: steps.detect.outputs.has-changesets == 'false' && steps.check-pre-mode.outputs.rc == 'true'
        uses: bluwy/auto-branch-sync-action@v1
        with:
          map: / -> rc
          skip-unchanged-check: ${{ inputs.skip-unchanged-check == true }}
          dry-run: ${{ inputs.dry-run == true }}