# Copyright 2019-2023 Tauri Programme within The Commons Conservancy
# SPDX-License-Identifier: Apache-2.0
# SPDX-License-Identifier: MIT

name: Lint Rust

on:
  push:
    branches:
      - v1
      - v2
    paths: &paths
      - '.github/workflows/lint-rust.yml'
      - '.scripts/ci/affected-rust-packages.js'
      - 'plugins/**'
      - '!plugins/*/guest-js/**'
      - '!plugins/*/android/**'
      - '!plugins/*/*.md'
      - '!plugins/*/package.json'
      - '!plugins/*/api-iife.js'
      - 'Cargo.toml'
      - 'Cargo.lock'
  pull_request:
    branches:
      - v1
      - v2
    paths: *paths
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  # Lists the plugins the change affects and splits them in shards, linted one after the other in
  # a single job per platform; see test-rust.yml for the reasoning.
  changes:
    runs-on: ubuntu-latest
    outputs:
      shards: ${{ steps.affected.outputs.shards }}
    steps:
      - uses: actions/checkout@v7
        with:
          # a pull request checks out its merge commit, whose first parent is the base branch
          fetch-depth: 2
      - id: affected
        run: node .scripts/ci/affected-rust-packages.js
        env:
          BASE: ${{ github.event_name == 'pull_request' && 'HEAD^1' || github.event.before }}
          ALL: ${{ github.event_name == 'workflow_dispatch' }}
          GLOBAL_PATHS: .github/workflows/lint-rust.yml

  clippy:
    name: clippy (${{ matrix.platform.target }}, ${{ matrix.shard.name }})
    needs: changes
    if: ${{ needs.changes.outputs.shards != '[]' && needs.changes.outputs.shards != '' }}
    runs-on: ${{ matrix.platform.os }}
    # a stuck step (e.g. `apt-get` waiting on an unreachable mirror) otherwise runs for 6 hours
    timeout-minutes: 90
    strategy:
      fail-fast: false
      matrix:
        shard: ${{ fromJSON(needs.changes.outputs.shards) }}
        platform:
          - target: x86_64-pc-windows-msvc
            os: windows-latest
            cargo: 'cargo'
          - target: x86_64-unknown-linux-gnu
            os: ubuntu-latest
            cargo: 'cargo'
          - target: aarch64-apple-darwin
            os: macos-latest
            cargo: 'cargo'
          - target: aarch64-apple-ios
            os: macos-latest
            cargo: 'cargo'
          - target: aarch64-linux-android
            os: ubuntu-latest
            cargo: 'cross'

    steps:
      - uses: actions/checkout@v7

      - name: install Linux dependencies
        if: contains(matrix.platform.target, 'unknown-linux')
        run: |
          sudo apt-get update
          sudo apt-get install -y libgtk-3-dev webkit2gtk-4.1 libayatana-appindicator3-dev

      - name: Install cross
        if: ${{ matrix.platform.cargo == 'cross' }}
        uses: taiki-e/install-action@v2
        with:
          tool: cross@0.2.5

      - name: Install clippy with stable toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy
          targets: ${{ matrix.platform.target }}

      - uses: Swatinem/rust-cache@v2
        with:
          # One entry per target shared by every shard (the default key is per job and runner
          # OS, which the Linux and Android jobs, and the macOS and iOS ones, would share), only
          # written from `v2`/`v3` and by a single shard; see test-rust.yml for the reasoning.
          key: ${{ matrix.platform.target }}
          save-if: ${{ (github.ref == 'refs/heads/v2' || github.ref == 'refs/heads/v3') && matrix.shard.save }}

      # The shard's packages are linted one after the other, and a failing package does not stop
      # the others: the step fails at the end if any did.
      - name: clippy ${{ matrix.shard.name }}
        shell: bash
        env:
          PACKAGES: ${{ matrix.shard.packages }}
          CARGO: ${{ matrix.platform.cargo }}
          TARGET: ${{ matrix.platform.target }}
        run: |
          failed=()
          for package in $PACKAGES; do
            echo "::group::clippy $package"
            if ! $CARGO clippy --package "$package" --target "$TARGET" --all-targets -- -D warnings; then
              failed+=("$package")
            # the features of `dialog` cannot all be enabled at once
            elif [ "$package" != tauri-plugin-dialog ] && ! $CARGO clippy --package "$package" --target "$TARGET" --all-targets --all-features -- -D warnings; then
              failed+=("$package (--all-features)")
            fi
            echo "::endgroup::"
          done

          if [ ${#failed[@]} -gt 0 ]; then
            for package in "${failed[@]}"; do
              echo "::error title=clippy failed::$package"
            done
            exit 1
          fi