# This is more or less a copy of
# https://github.com/mdn/content/blob/main/.github/workflows/pr-test.yml
# but done in a way that it first checks out mdn/translated-content (or
# fork of) and _then_ checks out mdn/content which has the relevant
# CI related tooling.

name: PR Test

on:
  pull_request:
    branches:
      - main

jobs:
  tests:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - uses: actions/checkout@v2
        with:
          repository: mdn/content
          path: mdn/content

      - name: Setup Node.js environment
        uses: actions/setup-node@v2.1.4
        with:
          node-version: "12"

      - name: Cache node_modules
        uses: actions/cache@v2.1.4
        id: cached-node_modules
        with:
          path: |
            ${{ github.workspace }}/mdn/content/node_modules
          key: ${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}

      - name: Install all yarn packages
        if: steps.cached-node_modules.outputs.cache-hit != 'true'
        working-directory: ${{ github.workspace }}/mdn/content
        run: |
          yarn --frozen-lockfile

      - uses: technote-space/get-diff-action@v4.0.5
        id: git_diff_content
        with:
          PATTERNS: files/**/*.html
          SET_ENV_NAME: GIT_DIFF_CONTENT

      - name: Build changed content
        if: ${{ env.GIT_DIFF_CONTENT }}
        env:
          CONTENT_ROOT: ${{ github.workspace }}/mdn/content/files
          CONTENT_TRANSLATED_ROOT: ${{ github.workspace }}/files
        working-directory: ${{ github.workspace }}/mdn/content
        run: |
          echo ${{ env.GIT_DIFF_CONTENT }}

          # Some day, when our number of flaws have reached 0 we'll change
          # this to "*:error" which means the slightest flaw in the build
          # will break the build.
          # See https://github.com/mdn/yari/issues/715
          export BUILD_FLAW_LEVELS="*:ignore"

          # Note, it might be interesting to explore building *some*
          # pages in a PR build if the diff doesn't have any index.html
          # files changed.
          # Instead of building the git diff, you build some known typical
          # folders that you know don't take too long and do cover a lot
          # of interesting macros etc.
          # This way, when an edit to the source code comes in, perhaps the
          # functional tests have a gap in them but actually building
          # real content exposes it.

          # Setting this to an empty string effectively means that the
          # <iframe> src will end up being the relative URL of the current
          # document as a base.
          # I.e. like this, if the current document is '/en-US/docs/Foo':
          #  <iframe src="/en-US/docs/Foo/_samples_/index.html">
          # ...for example.
          # Yes, it's potentially "insecure" because the iframe will execute
          # whatever code is inserted into the code example. But since the
          # whole (possible) domain for PR builds will never be somewhere
          # where there are interesting cookies, it's a safe choice.
          export BUILD_LIVE_SAMPLES_BASE_URL=

          # In these builds we never care for or need the ability to sign in.
          # This environment variable will disable that functionality entirely.
          export REACT_APP_DISABLE_AUTH=true

          # If we don't do this the built files will end up in
          # `node_modules/@mdn/yari/client/build/` and we don't want that
          # to get pushed into the cache.
          export BUILD_OUT_ROOT=/tmp/

          export BUILD_NO_PROGRESSBAR=true
          # The reason this script isn't in `package.json` is because
          # you don't need that script as a writer. It's only used in CI
          # and it can't use the default CONTENT_ROOT that gets set in
          # package.json.

          yarn build ${{ env.GIT_DIFF_CONTENT }}

      - uses: technote-space/get-diff-action@v4.0.5
        with:
          PATTERNS: files/**/*.+(png|jpeg|jpg|gif|svg|webp)
          ABSOLUTE: true
          SET_ENV_NAME: GIT_DIFF_FILES

      - name: Check changed files
        if: ${{ env.GIT_DIFF_FILES }}
        env:
          CONTENT_ROOT: ${{ github.workspace }}/mdn/content/files
          CONTENT_TRANSLATED_ROOT: ${{ github.workspace }}/files
        working-directory: ${{ github.workspace }}/mdn/content
        run: |
          echo ${{ env.GIT_DIFF_FILES }}

          yarn filecheck ${{ env.GIT_DIFF_FILES }}