name: docs

on:
  push:
    branches:
      - master
      - v[0-9]+.[0-9]+
    tags:
      - v[0-9]+.[0-9]+.[0-9]+
  pull_request:
    branches:
      - master
      - v[0-9]+.[0-9]+

jobs:
  docs-build:
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Check
        id: check
        run: |
          source ci/env.sh
          echo "::set-output name=tag::$CI_TAG"
          eval "$(ci/channel-info.sh)"
          echo "::set-output name=channel::$CHANNEL"

      - name: Get specific changed files
        id: changed-files-specific
        uses: tj-actions/changed-files@v29.0.7
        with:
          files: |
            .github/workflows/docs.yml
            docs/**

      - name: Pre Build
        id: prebuild
        run: |
          echo "tag: ${{ steps.check.outputs.tag }}"
          echo "channel: ${{ steps.check.outputs.channel }}"
          echo "any changes: ${{ steps.changed-files-specific.outputs.any_changed }}"
          echo "::set-output name=need_to_build::${{
            steps.check.outputs.tag != ''
            ||
            (
              (steps.check.outputs.channel == 'edge' || steps.check.outputs.channel == 'beta')
              &&
              steps.changed-files-specific.outputs.any_changed != ''
            )
          }}"
        shell: bash

      - name: Setup Node
        if: ${{ steps.prebuild.outputs.need_to_build == 'true' }}
        uses: actions/setup-node@v3
        with:
          node-version: 16

      - name: Build
        if: ${{ steps.prebuild.outputs.need_to_build == 'true' }}
        working-directory: docs
        run: |
          npm install
          ./build.sh
        env:
          VERCEL_TOKEN: ${{ secrets.VERCEL_TOKEN }}