# This workflow facilitates the individual building of Rust crates present in the repository.
# 1. A matrix is generated dynamically to identify each crate in the repository.
# 2. This matrix is checked for validity.
# 3. Each identified crate undergoes three build processes:
#    - With no features.
#    - With the default features.
#    - With all the features enabled.
# 4. In case of build failures outside of pull requests, an issue is either opened or updated
#    in the repository to report the failure.
# Throughout the workflow, various setup steps ensure the correct environment and tools are present.
name: Build crates individually

# Ensures that only one workflow task will run at a time. Previous builds, if
# already in process, will get cancelled. Only the latest commit will be allowed
# to run, cancelling any workflows in between
concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

on:
  workflow_dispatch:
  push:
    branches:
      - main
    paths:
      # production code and test code
      - '**/*.rs'
      # dependencies
      - '**/Cargo.toml'
      - '**/Cargo.lock'
      # configuration files
      - '.cargo/config.toml'
      - '**/clippy.toml'
      # workflow definitions
      - '.github/workflows/ci-build-crates.yml'
  pull_request:
    paths:
      # production code and test code
      - '**/*.rs'
      # dependencies
      - '**/Cargo.toml'
      - '**/Cargo.lock'
      # configuration files
      - '.cargo/config.toml'
      - '**/clippy.toml'
      # workflow definitions
      - '.github/workflows/ci-build-crates.yml'

env:
  CARGO_INCREMENTAL: ${{ vars.CARGO_INCREMENTAL }}
  RUST_LOG: ${{ vars.RUST_LOG }}
  RUST_BACKTRACE: ${{ vars.RUST_BACKTRACE }}
  RUST_LIB_BACKTRACE: ${{ vars.RUST_LIB_BACKTRACE }}
  COLORBT_SHOW_HIDDEN: ${{ vars.COLORBT_SHOW_HIDDEN }}

jobs:
  matrix:
    name: Generate crates matrix
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    steps:
      - uses: actions/checkout@v4.1.1
      - uses: r7kamura/rust-problem-matchers@v1.4.0

      # Setup Rust with stable toolchain and minimal profile
      - name: Setup Rust
        run: |
          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain=stable --profile=minimal

      # This step is meant to dynamically create a JSON containing the values of each crate
      # available in this repo in the root directory. We use `cargo tree` to accomplish this task.
      #
      # The result from `cargo tree` is then sorted so the longest job (zebrad) runs first,
      # transformed to JSON values between double quotes, and separated by commas,
      # then added to a `crates.txt`.
      #
      # A JSON object is created and assigned to a $MATRIX variable, which is use to create an
      # output named `matrix`, which is then used as the input in following steps,
      # using ` ${{ fromJson(needs.matrix.outputs.matrix) }}`
      - id: set-matrix
        name: Dynamically build crates JSON
        run: |
          TEMP_DIR=$(mktemp -d)
          cargo tree --depth 0 --edges no-normal,no-dev,no-build,no-proc-macro --prefix none | cut -d ' ' -f1 | sed '/^$/d' | LC_ALL=C sort --reverse | awk '{ printf "\"%s\",\n", $0 }' | sed '$ s/.$//' > $TEMP_DIR/crates.txt
          MATRIX=$( (
            echo '{ "crate" : ['
            echo "$(cat $TEMP_DIR/crates.txt)"
            echo " ]}"
          ) | jq -c .)
          echo $MATRIX
          echo $MATRIX | jq .
          echo "matrix=$MATRIX" >> "$GITHUB_OUTPUT"

  check-matrix:
    name: Check crates matrix
    runs-on: ubuntu-latest
    needs: [ matrix ]
    steps:
      - name: Install json2yaml
        run: |
          sudo npm install -g json2yaml

      - name: Check matrix definition
        run: |
          matrix='${{ needs.matrix.outputs.matrix }}'
          echo $matrix
          echo $matrix | jq .
          echo $matrix | json2yaml

  build:
    name: Build ${{ matrix.crate }} crate
    timeout-minutes: 90
    needs: [ matrix, check-matrix ]
    # Some of these builds take more than 14GB disk space
    runs-on: ubuntu-latest-m
    strategy:
      # avoid rate-limit errors by only launching a few of these jobs at a time,
      # but still finish in a similar time to the longest tests
      max-parallel: 4
      fail-fast: true
      matrix: ${{ fromJson(needs.matrix.outputs.matrix) }}

    steps:
      - uses: actions/checkout@v4.1.1
        with:
          persist-credentials: false
      - uses: r7kamura/rust-problem-matchers@v1.4.0

      - name: Install last version of Protoc
        uses: arduino/setup-protoc@v2.1.0
        with:
          # TODO: increase to latest version after https://github.com/arduino/setup-protoc/issues/33 is fixed
          version: '23.x'
          repo-token: ${{ secrets.GITHUB_TOKEN }}

      # Setup Rust with stable toolchain and minimal profile
      - name: Setup Rust
        run: |
          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain=stable --profile=minimal

      # We could use `features: ['', '--all-features', '--no-default-features']` as a matrix argument,
      # but it's faster to run these commands sequentially, so they can re-use the local cargo cache.
      #
      # Some Zebra crates do not have any features, and most don't have any default features.
      # Some targets activate features, but we still need to be able to build without them.
      - name: Build ${{ matrix.crate }} crate with default features
        run: |
          cargo clippy --package ${{ matrix.crate }} -- -D warnings
          cargo build --package ${{ matrix.crate }}

      - name: Build ${{ matrix.crate }} crate with no default features and all targets
        run: |
          cargo clippy --package ${{ matrix.crate }} --no-default-features --all-targets -- -D warnings
          cargo build --package ${{ matrix.crate }} --no-default-features --all-targets

      - name: Build ${{ matrix.crate }} crate with default features and all targets
        run: |
          cargo clippy --package ${{ matrix.crate }} --all-targets -- -D warnings
          cargo build --package ${{ matrix.crate }} --all-targets

      - name: Build ${{ matrix.crate }} crate with all features and all targets
        run: |
          cargo clippy --package ${{ matrix.crate }} --all-features --all-targets -- -D warnings
          cargo build --package ${{ matrix.crate }} --all-features --all-targets

  failure-issue:
    name: Open or update issues for building crates individually failures
    # When a new job is added to this workflow, add it to this list.
    needs: [ matrix, build ]
    # Only open tickets for failed or cancelled jobs that are not coming from PRs.
    # (PR statuses are already reported in the PR jobs list, and checked by Mergify.)
    if: (failure() && github.event.pull_request == null) || (cancelled() && github.event.pull_request == null)
    runs-on: ubuntu-latest
    steps:
      - uses: jayqi/failed-build-issue-action@v1
        with:
          title-template: "{{refname}} branch CI failed: {{eventName}} in {{workflow}}"
          # New failures open an issue with this label.
          label-name: S-ci-fail-build-crates-auto-issue
          # If there is already an open issue with this label, any failures become comments on that issue.
          always-create-new-issue: false
          github-token: ${{ secrets.GITHUB_TOKEN }}