# Largely borrowed from https://github.com/lit/lit/blob/56e8efd/.github/workflows/benchmarks.yml
name: Benchmarks

on: [pull_request]

jobs:
  benchmarks:
    name: benchmarks

    # We can't currently run benchmarks on PRs from forked repos, because the
    # tachometer action reports results by posting a comment, and we can't post
    # comments without a github token.
    if: github.event.pull_request == null || github.event.pull_request.head.repo.full_name == github.repository

    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      - uses: actions/setup-node@v1
        with:
          node-version: 14

      # via https://github.com/actions/cache/blob/0638051/examples.md#node---yarn
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn cache dir)"

      - uses: actions/cache@v2
        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: yarn install
        if: steps.cache.outputs.cache-hit != 'true'
        run: |
          yarn --immutable --ignore-scripts
          # install the chromedriver corresponding to whatever version of chrome is installed
          yarn add --ignore-scripts chromedriver@^$(google-chrome --version | awk '{print $3}' | cut -d. -f1)
          PERF=1 yarn build:rollup
          ./bin/setup-benchmark.sh

      # first-load
      - name: Benchmark first-load
        run: |
          ./node_modules/.bin/tach \
            --config ./test/benchmark/first-load.tachometer.json \
            --json-file ./test/benchmark/first-load.results.json

      - name: Report first-load
        uses: andrewiggins/tachometer-reporter-action@v2
        with:
          report-id: emoji-picker-element-first-load
          path: test/benchmark/first-load.results.json
          pr-bench-name: this-change
          base-bench-name: tip-of-tree

      # second-load
      - name: Benchmark second-load
        run: |
          ./node_modules/.bin/tach \
            --config ./test/benchmark/second-load.tachometer.json \
            --json-file ./test/benchmark/second-load.results.json

      - name: Report second-load
        uses: andrewiggins/tachometer-reporter-action@v2
        with:
          report-id: emoji-picker-element-second-load
          path: test/benchmark/second-load.results.json
          pr-bench-name: this-change
          base-bench-name: tip-of-tree

      # database-interactions
      - name: Benchmark database-interactions
        run: |
          ./node_modules/.bin/tach \
            --config ./test/benchmark/database-interactions.tachometer.json \
            --json-file ./test/benchmark/database-interactions.results.json

      - name: Report database-interactions
        uses: andrewiggins/tachometer-reporter-action@v2
        with:
          report-id: emoji-picker-element-database-interactions
          path: test/benchmark/database-interactions.results.json
          pr-bench-name: this-change
          base-bench-name: tip-of-tree