constellation/.github/workflows/reproducible-builds.yml

# Build Constellation CLI and check for reproducible builds
name: Reproducible Builds

on:
  workflow_dispatch:
  schedule:
    - cron: "45 06 * * 1" # Every Monday at 6:45am

jobs:
  build-binaries:
    strategy:
        fail-fast: false
        matrix:
          target:
            - "cli_enterprise_darwin_amd64"
            - "cli_enterprise_darwin_arm64"
            - "cli_enterprise_linux_amd64"
            - "cli_enterprise_linux_arm64"
            - "cli_enterprise_windows_amd64"
          runner: ["ubuntu-22.04", "macos-13"]
    env:
        bazel_target: "//cli:${{ matrix.target }}"
        binary: "${{ matrix.target }}-${{ matrix.runner }}"
    runs-on: ${{ matrix.runner }}
    steps:
      - name: Checkout
        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
        with:
          ref: ${{ !github.event.pull_request.head.repo.fork && github.head_ref || '' }}

      - name: Setup bazel
        uses: ./.github/actions/setup_bazel
        with:
          useCache: "logs"
          buildBuddyApiKey: ${{ secrets.BUILDBUDDY_ORG_API_KEY }}

      - name: Install current Bash on macOS
        if: runner.os == 'macOS'
        run: brew install bash

      - name: Build
        shell: bash
        run: bazel build "${bazel_target}"

      - name: Copy
        shell: bash
        run: cp "$(bazel cquery --output=files "${bazel_target}")" "${binary}"

      - name: Collect hash (linux)
        shell: bash
        if: runner.os == 'Linux'
        run: sha256sum "${binary}" | tee "${binary}.sha256"

      - name: Collect hash (macOS)
        shell: bash
        if: runner.os == 'macOS'
        run: shasum -a 256 "${binary}" | tee "${binary}.sha256"

      - name: Upload binary artifact
        uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce # v3.1.2
        with:
          name: "binaries-${{ matrix.target }}"
          path: "${{ env.binary }}"

      - name: Upload hash artifact
        uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce # v3.1.2
        with:
          name: "sha256sums"
          path: "${{ env.binary }}.sha256"

  compare:
    needs: build-binaries
    strategy:
        fail-fast: false
        matrix:
            target:
            - "cli_enterprise_darwin_amd64"
            - "cli_enterprise_darwin_arm64"
            - "cli_enterprise_linux_amd64"
            - "cli_enterprise_linux_arm64"
            - "cli_enterprise_windows_amd64"
    runs-on: ubuntu-22.04
    steps:
        - name: Download binaries
          uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2
          with:
            name: "binaries-${{ matrix.target }}"

        - name: Hash
          shell: bash
          if: runner.os == 'Linux'
          run: sha256sum cli_enterprise*

        - name: Compare binaries
          shell: bash
          run: |
            # shellcheck disable=SC2207,SC2116
            list=($(echo "cli_enterprise*"))
            diff -s --to-file="${list[0]}" "${list[@]:1}" | tee "${GITHUB_STEP_SUMMARY}"