rust.yml

name: Rust

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]
  workflow_dispatch:

permissions:
  contents: read

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

env:
  CARGO_TERM_COLOR: always
  # Build gitcomet in headless mode (no GPUI system deps required).
  # The UI-only code paths are behind #[cfg(feature = "ui-gpui")] guards.
  APP_FEATURES: "--no-default-features --features gix"

jobs:
  fmt:
    name: Rustfmt
    runs-on: ubuntu-22.04
    timeout-minutes: 60
    steps:
    - uses: actions/checkout@v6
    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
      with:
        components: rustfmt
    - name: Cache Rust artifacts
      uses: Swatinem/rust-cache@v2
    - name: Check formatting
      run: cargo fmt --all --check

  audit:
    name: Dependency audit (cargo-audit)
    runs-on: ubuntu-22.04
    timeout-minutes: 60
    steps:
    - uses: actions/checkout@v6
    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
    - name: Cache Rust artifacts
      uses: Swatinem/rust-cache@v2
    - name: Install cargo-audit
      run: cargo install cargo-audit --locked
    - name: Run cargo-audit
      run: |
        cargo audit \
          --ignore RUSTSEC-2025-0052 \
          --ignore RUSTSEC-2024-0384 \
          --ignore RUSTSEC-2024-0436 \
          --ignore RUSTSEC-2025-0134

  clippy:
    name: Clippy
    runs-on: ubuntu-22.04
    timeout-minutes: 60
    steps:
    - uses: actions/checkout@v6
    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
    - name: Cache Rust artifacts
      uses: Swatinem/rust-cache@v2
    - name: Clippy (core + state + git backends)
      run: cargo clippy -p gitcomet-core -p gitcomet-state -p gitcomet-git -p gitcomet-git-gix -- -D warnings
    - name: Clippy (shared UI crate)
      run: cargo clippy -p gitcomet-ui -- -D warnings
    - name: Clippy (GPUI UI crate -- intentionally skipped on headless CI)
      run: |
        echo "Skipping cargo clippy -p gitcomet-ui-gpui in this job."
        echo "Reason: GPUI requires native windowing/system dependencies that are not available in headless CI."
    - name: Clippy (app — headless)
      run: cargo clippy -p gitcomet $APP_FEATURES -- -D warnings

  build:
    name: Build
    runs-on: ubuntu-22.04
    timeout-minutes: 60
    steps:
    - uses: actions/checkout@v6
    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
    - name: Cache Rust artifacts
      uses: Swatinem/rust-cache@v2
    - name: Build (core + state + backend)
      run: cargo build -p gitcomet-core -p gitcomet-state -p gitcomet-git-gix --verbose
    - name: Build (app — headless)
      run: cargo build -p gitcomet $APP_FEATURES --verbose

  # Core merge algorithm correctness — Phase 1A/1B/1C portability tests
  merge-algorithm:
    name: Merge algorithm parity (t6403/t6427)
    runs-on: ubuntu-22.04
    timeout-minutes: 60
    needs: build
    steps:
    - uses: actions/checkout@v6
    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
    - name: Cache Rust artifacts
      uses: Swatinem/rust-cache@v2
    - name: t6403/t6427 merge algorithm portability
      run: cargo test -p gitcomet-core --test merge_algorithm --verbose
    - name: Conflict label formatting (Phase 1C)
      run: cargo test -p gitcomet-core --test conflict_label_formatting --verbose
    - name: Meld algorithm parity (Phase 5)
      run: cargo test -p gitcomet-core --lib meld_tests --verbose
    - name: Core library unit tests
      run: cargo test -p gitcomet-core --lib --verbose
    - name: State management (conflict session, reducers, effects)
      run: cargo test -p gitcomet-state --verbose

  # Fixture harness and corpus — Phase 2/3A regression gates
  merge-regression:
    name: Merge regression suite (fixtures + corpus)
    runs-on: ubuntu-22.04
    timeout-minutes: 60
    needs: build
    steps:
    - uses: actions/checkout@v6
    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
    - name: Cache Rust artifacts
      uses: Swatinem/rust-cache@v2
    - name: KDiff3-style fixture harness (Phase 2)
      run: cargo test -p gitcomet-core --test merge_fixture_harness --verbose
    - name: Permutation corpus (Phase 3A — 243 sampled cases)
      run: cargo test -p gitcomet-core --test merge_permutation_corpus --verbose
    - name: Real-world merge extraction (Phase 3C)
      run: cargo test -p gitcomet-core --test merge_git_extraction --verbose

  # E2E integration with git mergetool/difftool — Phase 4A/4B
  tool-integration:
    name: Git mergetool/difftool E2E parity
    runs-on: ubuntu-22.04
    timeout-minutes: 60
    needs: build
    steps:
    - uses: actions/checkout@v6
    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
    - name: Cache Rust artifacts
      uses: Swatinem/rust-cache@v2
    - name: Build gitcomet binary (headless)
      run: cargo build -p gitcomet $APP_FEATURES
    - name: Git mergetool E2E (Phase 4A — t7610 parity)
      run: cargo test -p gitcomet $APP_FEATURES --test mergetool_git_integration --verbose
    - name: Git difftool E2E (Phase 4B — t7800 parity)
      run: cargo test -p gitcomet $APP_FEATURES --test difftool_git_integration --verbose
    - name: Standalone tool-mode E2E (exit codes + validation)
      run: cargo test -p gitcomet $APP_FEATURES --test standalone_tool_mode_integration --verbose
    - name: Mergetool/difftool runtime unit tests (bin target)
      run: cargo test -p gitcomet $APP_FEATURES --bin gitcomet --verbose

  # Backend integration — mergetool launcher, status, conflict checkout
  backend-integration:
    name: Git backend integration
    runs-on: ubuntu-22.04
    timeout-minutes: 60
    needs: build
    steps:
    - uses: actions/checkout@v6
    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
    - name: Cache Rust artifacts
      uses: Swatinem/rust-cache@v2
    - name: Git CLI migration scoreboard
      run: cargo test -p gitcomet-git-gix --test git_cli_scoreboard -- --nocapture
    - name: Status and mergetool backend integration
      run: cargo test -p gitcomet-git-gix --verbose