unused-dependencies.yml

name: unused-dependencies

on:
  schedule:
    - cron: "21 4 * * mon"
  workflow_dispatch:

jobs:
  cargo-udeps:
    runs-on: ubuntu-latest
    permissions:
      contents: "read"
      issues: "write"
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@nightly
      - name: Install cargo-udeps
        uses: taiki-e/install-action@cargo-udeps
      - name: Run cargo-udeps, all features
        shell: bash   # Set this explicitly for -o pipefail behavior
        run: cargo +nightly udeps --all-features | tee log_all_features.txt
      - name: Run cargo-udeps, default features
        if: success() || failure()
        shell: bash   # Set this explicitly for -o pipefail behavior
        run: cargo +nightly udeps | tee log_default_features.txt
      - name: Create issue
        if: failure()
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs');

            const tryReadFile = (file) => {
              try {
                return fs.readFileSync(file, 'utf8').toString();
              } catch (err) {
                console.log(`${file}: ${err}`);
              }
              return '';
            };

            const logAllFeatures = tryReadFile('log_all_features.txt');
            const logDefaultFeatures = tryReadFile('log_default_features.txt');

            let output;
            if (logAllFeatures.length == 0 && logDefaultFeatures == 0) {
              output = `### Unused dependencies

              An error was encountered when checking for unused dependencies.

              `;
            } else {
              output = `### Unused dependencies

              Unused dependencies were detected in the Cargo workspace.

              #### --all-features

              <details><summary>Show output</summary>

              \`\`\`
              ${logAllFeatures}
              \`\`\`

              </details>

              #### Default features

              <details><summary>Show output</summary>

              \`\`\`
              ${logDefaultFeatures}
              \`\`\`

              </details>

              `;
            }
            output += `#### Details
            - Run URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
            - Git SHA: ${{ github.sha }}
            `;

            github.rest.issues.create({
              owner: context.repo.owner,
              repo: context.repo.repo,
              title: 'Unused dependencies',
              body: output,
            });