depcheck.yml

name: DepCheck
on:
  pull_request:
    types: ["opened", "reopened", "synchronize"]
    paths:
      - .github/workflows/depcheck.yml
      - client-admin/**

jobs:
  run:
    runs-on: ubuntu-latest
    env:
      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      CI_COMMIT_ID: ${{ github.event.pull_request.head.sha || github.sha }}
      CI_REPO_NAME: ${{ github.repository }}
    steps:
      # See: https://github.community/t/if-expression-with-context-variable/16558/6
      - name: Check if secrets available
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          unset HAS_SECRET
          if [ -n "$GITHUB_TOKEN" ]; then HAS_SECRET=true; fi
          echo "name=HAS_SECRET" >> $GITHUB_ENV

      - name: Use Node.js
        uses: actions/setup-node@v2.1.5
        with:
          node-version: 14.4.0

      # See: https://github.com/taskworld/commit-status
      - name: Install commit-status CLI tool
        run: npm install -g commit-status

      - name: Initiate commit status placeholders
        if: github.event.pull_request.head.repo.full_name == github.repository
        run: |
          # commit-status <state> <context> <description> <link>
          commit-status pending "DepCheck / dependencies"    "Detecting unused packages..."
          commit-status pending "DepCheck / devDependencies" "Detecting unused packages..."

      - uses: actions/checkout@v2.3.4

      - name: Install depcheck CLI tool
        run: npm install -g depcheck

      - name: Install project dependencies
        working-directory: client-admin
        run: npm install

      - name: Run depcheck and save output
        id: depcheck
        working-directory: client-admin
        env:
          # See: https://github.com/depcheck/depcheck#special
          DEPCHECK_SPECIALS: "webpack,babel,eslint,prettier,bin"
          # Why ignoring?
          # - prettier: because it's needed by eslint-plugin-prettier, but peerDependencies aren't yet supported.
          #   See: https://github.com/depcheck/depcheck/issues/522
          # - webpack-cli: Needed for `webpack` command, but provide `webpack-cli` bin, which confuses depcheck.
          DEPCHECK_IGNORES: "prettier,prettier-config-standard,webpack-cli,gulp-cli"
        run: |
          # Note: Commit status descriptions can have 140 characters max. (We add an ellipsis in the final step as final char)
          # Suppress failing exit codes with `true`.
          depcheck --specials "$DEPCHECK_SPECIALS" --ignores "$DEPCHECK_IGNORES" --json > .results.json || true
          echo ::set-output name=dependencies::$(cat .results.json | jq '.dependencies | join(", ") | .[:139]' --raw-output)
          echo ::set-output name=devdependencies::$(cat .results.json | jq '.devDependencies | join(", ") | .[:139]' --raw-output)

      - name: Set commit status messages and success states
        if: github.event.pull_request.head.repo.full_name == github.repository
        run: |
          if [ "${{ steps.depcheck.outputs.dependencies }}" = "" ]; then
            commit-status success "DepCheck / dependencies" "No unused packages detected."
          else
            commit-status failure "DepCheck / dependencies" "${{ steps.depcheck.outputs.dependencies }}…"
          fi

          if [ "${{ steps.depcheck.outputs.devdependencies }}" = "" ]; then
            commit-status success "DepCheck / devDependencies" "No unused packages detected."
          else
            commit-status failure "DepCheck / devDependencies" "${{ steps.depcheck.outputs.devdependencies }}…"
          fi