pr-filecheck.yml

# Note that this workflow uses `get-diff-action` which is important.
# It gives us an environment variable called `GIT_DIFF` which is a string
# that is a list of file paths.
# If you want to do what this workflow does on your laptop you can simulate
# it like this:
#
#    yarn filecheck $(git diff main... '--diff-filter=AM' --name-only | rg '\.(png|svg|jpe?g|gif|webp)')
#
# That way, you can behave on your laptop like, this action behaves here.

name: PR Filecheck

on:
  pull_request:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - uses: technote-space/get-diff-action@v3
        id: git_diff_content
        with:
          SUFFIX_FILTER: |
            .png
            .jpeg
            .jpg
            .gif
            .svg
            .webp
          PREFIX_FILTER: files/
          ABSOLUTE: true

      - uses: actions/checkout@v2
        if: steps.git_diff_content.outputs.diff
        with:
          repository: mdn/yari
          path: yari

      - name: Setup Node.js environment
        if: steps.git_diff_content.outputs.diff
        uses: actions/setup-node@v2.1.2
        with:
          node-version: "12"

      - name: Get yarn cache directory path
        if: steps.git_diff_content.outputs.diff
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn cache dir)"
      - uses: actions/cache@v2.1.2
        if: steps.git_diff_content.outputs.diff
        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
          restore-keys: |
            ${{ runner.os }}-yarn-

      - name: Install all yarn packages
        if: steps.git_diff_content.outputs.diff
        run: |
          cd yari
          yarn --frozen-lockfile

      - name: Check changed files
        if: steps.git_diff_content.outputs.diff
        run: |
          export CONTENT_ROOT=$(pwd)/files
          # Need to run from the yari we've cleanly cloned.
          cd yari

          yarn filecheck ${{ env.GIT_DIFF }}