name: CI

on:
  push:
    branches: [ master, dev, ci_testing, experiments ]
  pull_request:
    branches: [ master, dev ]
  workflow_dispatch:

env:
  LLVM_RELEASE_VERSION: 21.x
  LLVM_RELEASE_VERSION_LINUX_MUSL: 20
  LLVM_RELEASE_VERSION_OPENBSD: 20
  LLVM_RELEASE_VERSION_NETBSD: 19
  LLVM_DEV_VERSION: 22
  # CACHE_INVALIDATION_SEED: '%Y-%m-%d' # Daily
  CACHE_INVALIDATION_SEED: '%G-%V'   # Weekly

jobs:

  build-msvc:
    runs-on: windows-latest
    timeout-minutes: 30
    strategy:
      fail-fast: false
      matrix:
        build_type: [ Release, Debug ]
    defaults:
      run:
        shell: cmd
    steps:
      - uses: actions/checkout@v6
      - uses: actions/cache@v5
        with:
          path: build/_deps
          key: ${{ runner.os }}-llvm-${{ env.LLVM_RELEASE_VERSION }}-${{ matrix.build_type }}-${{ hashFiles('CMakeLists.txt', '.github/workflows/main.yml') }}

      # set up the environment for Ninja
      - uses: ilammy/msvc-dev-cmd@v1
        with:
          arch: x64

      - name: CMake Build
        run: |
          cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DC3_FETCH_LLVM=ON
          cmake --build build --config ${{ matrix.build_type }}

      # We remove the GNU link tool so C3C picks up the MSVC link.exe
      - name: Remove GNU Link
        shell: bash
        run: rm -f /usr/bin/link

      - name: Run Unified Tests
        shell: bash
        run: ./scripts/tools/ci_tests.sh "./build/c3c.exe"

      - name: Cache MSVC SDK
        id: cache-msvc-sdk
        uses: actions/cache@v5
        with:
          path: msvc_sdk
          key: msvc-sdk-${{ runner.os }}-${{ hashFiles('msvc_build_libraries.py') }}

      - if: steps.cache-msvc-sdk.outputs.cache-hit != 'true'
        run: py msvc_build_libraries.py --accept-license

      - name: Bundle (Windows)
        shell: bash
        run: ./scripts/tools/package_build.sh "./build/c3c.exe" "c3-windows-${{ matrix.build_type }}" "zip"

      - uses: actions/upload-artifact@v6
        with:
          name: c3-windows-${{ matrix.build_type }}
          path: c3-windows-${{ matrix.build_type }}.zip

  build-msys2-mingw:
    runs-on: windows-latest
    timeout-minutes: 30
    strategy:
      fail-fast: false
      matrix:
        build_type: [Debug]
    defaults:
      run:
        shell: msys2 {0}
    steps:
      - uses: actions/checkout@v6
      - uses: msys2/setup-msys2@v2
        with:
          msystem: MINGW64
          update: false
          cache: true
          install: git binutils mingw-w64-x86_64-clang mingw-w64-x86_64-ninja mingw-w64-x86_64-cmake mingw-w64-x86_64-toolchain mingw-w64-x86_64-python mingw-w64-x86_64-llvm mingw-w64-x86_64-llvm-libs

      - name: Install LLD
        run: |
          echo "Server = https://mirror.msys2.org/mingw/mingw64" > /etc/pacman.d/mirrorlist.mingw64
          for i in 1 2; do \
            pacman -Sy --noconfirm --needed \
              mingw-w64-x86_64-llvm \
              mingw-w64-x86_64-llvm-libs \
              mingw-w64-x86_64-lld \
              mingw-w64-x86_64-clang && break || sleep 5; \
          done

      - name: CMake Build
        run: |
          cmake -B build -G Ninja -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DCMAKE_LINKER=lld -DC3_LINK_DYNAMIC=OFF -DLLVM_DIR=/mingw64/lib/cmake/llvm -DC3_LLD_DIR=/mingw64/lib/
          cmake --build build
      - name: Run Unified Tests
        run: ./scripts/tools/ci_tests.sh "./build/c3c"

  build-msys2-clang:
    runs-on: windows-latest
    timeout-minutes: 30
    strategy:
      fail-fast: false
      matrix:
        build_type: [Debug]
    defaults:
      run:
        shell: msys2 {0}
    steps:
      - uses: actions/checkout@v6
      - uses: msys2/setup-msys2@v2
        with:
          msystem: CLANG64
          update: false
          cache: true
          install: git binutils mingw-w64-clang-x86_64-cmake mingw-w64-clang-x86_64-toolchain mingw-w64-clang-x86_64-python
      - name: CMake Build
        run: |
          cmake -B build -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
          cmake --build build
      - name: Run Unified Tests
        run: ./scripts/tools/ci_tests.sh "./build/c3c"

  build-linux:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        build_type: [Release, Debug]
    steps:
      - uses: actions/checkout@v6
      - name: Get current date context
        id: date
        run: echo "date=$(date +'${{ env.CACHE_INVALIDATION_SEED }}')" >> $GITHUB_OUTPUT
      - name: Cache APT archives
        uses: actions/cache@v5
        with:
          path: apt-cache
          key: apt-cache-${{ runner.os }}-${{ steps.date.outputs.date }}
      - run: |
          mkdir -p apt-cache/partial
          for i in 1 2 3; do sudo apt-get update && break || sleep 2; done
          for i in 1 2 3; do sudo apt-get install -y -o dir::cache::archives="$(pwd)/apt-cache" --fix-missing zlib1g zlib1g-dev python3 ninja-build curl libcurl4-openssl-dev && break || sleep 2; done
          sudo chown -R $USER:$USER apt-cache
      - name: CMake Build
        run: |
          cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DC3_FETCH_LLVM=ON
          cmake --build build
      - name: Run Unified Tests
        run: ./scripts/tools/ci_tests.sh "./build/c3c"

      - name: Embedded/QEMU Tests
        run: |
          sudo apt-get install -y opensbi qemu-system-misc u-boot-qemu gcc-riscv64-unknown-elf
          cd resources/examples/embedded/riscv-qemu
          make C3C_PATH=../../../../build/ run

      - name: Bundle & Upload (Linux)
        run: |
          bash ./scripts/tools/package_build.sh "./build/c3c" "c3-linux-${{matrix.build_type}}" "tar"
      - uses: actions/upload-artifact@v6
        with:
          name: c3-linux-${{matrix.build_type}}
          path: c3-linux-${{matrix.build_type}}.tar.gz

  build-linux-alpine:
    runs-on: ubuntu-latest
    container:
      image: alpine:3.23
    strategy:
      fail-fast: false
      matrix:
        build_type: [Release, Debug]
    steps:
      - uses: actions/checkout@v6

      - name: Get current date context
        id: date
        run: echo "date=$(date +'${{ env.CACHE_INVALIDATION_SEED }}')" >> $GITHUB_OUTPUT

      #https://wiki.alpinelinux.org/wiki/Local_APK_cache
      - name: Prepare real apk cache directory + symlink
        run: |
          mkdir -p /var/cache/apk
          ln -sf /var/cache/apk /etc/apk/cache

      - name: Cache APK downloaded packages (daily)
        uses: actions/cache@v5
        with:
          path: /var/cache/apk
          key: apk-pkgs-${{ runner.os }}-alpine-3.23-${{ steps.date.outputs.date }}
          restore-keys: |
            apk-pkgs-${{ runner.os }}-alpine-3.23-

      - name: Install dependencies
        run: |
          V=${{env.LLVM_RELEASE_VERSION_LINUX_MUSL}}
          for i in 1 2 3; do apk update && break || sleep 2; done
          for i in 1 2 3; do \
            apk add \
              build-base bash git cmake ninja python3 linux-headers \
              tar zstd \
              zlib-dev curl-dev libffi-dev \
              llvm${V}-dev \
              llvm${V}-static \
              llvm${V}-gtest \
              clang${V}-dev \
              clang${V}-static \
              lld${V}-dev \
              lld${V}-libs && break || sleep 2; \
          done

      - name: CMake Build
        run: |
          cmake -B build -G Ninja \
            -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
            -DC3_FETCH_LLVM=OFF \
            -DLLVM_ENABLE_LIBXML2=OFF \
            -DC3_LINK_DYNAMIC=ON
          cmake --build build

      - name: Run Unified Tests
        run: ./scripts/tools/ci_tests.sh "./build/c3c"
      - name: Bundle & Upload (Alpine)
        run: bash ./scripts/tools/package_build.sh "./build/c3c" "c3-linux-musl-${{ matrix.build_type }}" "tar"
      - uses: actions/upload-artifact@v6
        with:
          name: c3-linux-musl-${{ matrix.build_type }}
          path: c3-linux-musl-${{ matrix.build_type }}.tar.gz

  build-mac:
    runs-on: macos-latest
    strategy:
      fail-fast: false
      matrix:
        build_type: [Release, Debug]
    steps:
      - uses: actions/checkout@v6
      - name: CMake Build
        run: |
          cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DC3_FETCH_LLVM=ON
          cmake --build build
      - name: Run Unified Tests
        run: ./scripts/tools/ci_tests.sh "./build/c3c"

      - name: Build Lib (Mac)
        run: |
          cd resources/testproject
          ../../build/c3c build hello_world_lib -vv --trust=full

      - name: Bundle & Upload (Mac)
        run: bash ./scripts/tools/package_build.sh "./build/c3c" "c3-macos-${{matrix.build_type}}" "zip"
      - uses: actions/upload-artifact@v6
        with:
          name: c3-macos-${{matrix.build_type}}
          path: c3-macos-${{matrix.build_type}}.zip

  build-openbsd:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        build_type: [Debug]
        version: ['7.8']
    steps:
      - uses: actions/checkout@v6

      - name: Build, Test and Package in OpenBSD
        uses: cross-platform-actions/action@master
        with:
          operating_system: openbsd
          version: ${{ matrix.version }}
          cpu_count: 4
          memory: 6G
          run: |
            # Install dependencies
            for i in 1 2 3; do
              sudo pkg_add ninja cmake llvm%${{ env.LLVM_RELEASE_VERSION_OPENBSD }} bash && break || sleep 5
            done

            export MALLOC_OPTIONS=j

            # Setup RAM Disk
            sudo mkdir -p /mnt/ram
            sudo mount_mfs -s $((2 * 1024 * 1024 * 2)) swap /mnt/ram
            sudo chown -R $(id -u):$(id -g) /mnt/ram
            export TMPDIR=/mnt/ram

            # Copy source to RAM disk and switch to it
            cp -rp . /mnt/ram/
            cd /mnt/ram

            # Build
            cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
            cmake --build build

            # Run Unified Tests
            chmod +x scripts/tools/ci_tests.sh
            ulimit -d $(ulimit -Hd) || true
            ./scripts/tools/ci_tests.sh "./build/c3c"

            # Package
            chmod +x scripts/tools/package_build.sh
            ./scripts/tools/package_build.sh "./build/c3c" "c3-openbsd-${{matrix.build_type}}" "tar"

            # Move results back to workspace for GitHub rsync/upload
            mkdir -p "$GITHUB_WORKSPACE"/build
            cp build/c3c "$GITHUB_WORKSPACE"/build/
            cp *.tar.gz "$GITHUB_WORKSPACE"/

      - uses: actions/upload-artifact@v6
        with:
          name: c3-openbsd-${{matrix.build_type}}
          path: c3-openbsd-${{matrix.build_type}}.tar.gz

  build-netbsd:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        build_type: [Debug]
        version: ['10.1']
    steps:
      - uses: actions/checkout@v6

      - name: Build, Test and Package in NetBSD
        uses: cross-platform-actions/action@master
        with:
          operating_system: netbsd
          version: ${{ matrix.version }}
          cpu_count: 4
          memory: 6G
          run: |
            # Install dependencies
            export PATH="/usr/pkg/sbin:/usr/pkg/bin:$PATH"
            export PKG_PATH="https://ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/$(uname -m)/$(uname -r)/All/"

            # Ensure pkgin is available and updated
            sudo /usr/sbin/pkg_add -U pkgin || true

            for i in 1 2 3; do
              sudo pkgin -y update && \
              sudo pkgin -y install cmake gcc14 ninja-build bash \
                'llvm>=${{ env.LLVM_RELEASE_VERSION_NETBSD }}' \
                'clang>=${{ env.LLVM_RELEASE_VERSION_NETBSD }}' \
                'lld>=${{ env.LLVM_RELEASE_VERSION_NETBSD }}' && break || sleep 5
            done

            export CC=clang
            export CXX=clang++

            # Setup RAM Disk
            sudo mkdir -p /mnt/ram
            sudo mount_tmpfs -s 2G tmpfs /mnt/ram
            sudo chown -R $(id -u):$(id -g) /mnt/ram
            export TMPDIR=/mnt/ram

            # Copy source to RAM disk and switch to it
            cp -rp . /mnt/ram/
            cd /mnt/ram

            # Build
            cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
            cmake --build build

            # Run Unified Tests
            chmod +x scripts/tools/ci_tests.sh
            ./scripts/tools/ci_tests.sh "./build/c3c"

            # Package
            chmod +x scripts/tools/package_build.sh
            ./scripts/tools/package_build.sh "./build/c3c" "c3-netbsd-${{matrix.build_type}}" "tar"

            # Move results back to workspace for GitHub rsync/upload
            mkdir -p "$GITHUB_WORKSPACE"/build
            cp build/c3c "$GITHUB_WORKSPACE"/build/
            cp *.tar.gz "$GITHUB_WORKSPACE"/

      - uses: actions/upload-artifact@v6
        with:
          name: c3-netbsd-${{matrix.build_type}}
          path: c3-netbsd-${{matrix.build_type}}.tar.gz

  build-with-docker:
    name: LLVM ${{ matrix.llvm_version }} Compatibility
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        llvm_version: [17, 18, 19, 20]
    steps:
      - uses: actions/checkout@v6

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build and cache Docker image
        uses: docker/build-push-action@v6
        with:
          context: ./docker
          build-args: |
            LLVM_VERSION=${{ matrix.llvm_version }}
            UBUNTU_VERSION=22.04
            CMAKE_VERSION=3.20.0
          tags: c3c-builder:latest
          outputs: type=docker,dest=/tmp/c3c-builder.tar
          cache-from: type=gha,scope=build-with-docker-${{ matrix.llvm_version }}
          cache-to: type=gha,mode=max,scope=build-with-docker-${{ matrix.llvm_version }}
        env:
          DOCKER_BUILD_SUMMARY: false

      - name: Load Docker image
        run: docker load -i /tmp/c3c-builder.tar

      - name: Build C3 in Docker
        run: |
          rm -rf build bin
          mkdir -p build bin
          chmod -R 777 build bin
          docker run --rm \
            -v "$(pwd):/home/c3c/source" \
            -w /home/c3c/source \
            c3c-builder:latest \
            bash -c "git config --global --add safe.directory /home/c3c/source && \
            cmake -S . -B build \
                    -G Ninja \
                    -DCMAKE_BUILD_TYPE=Debug \
                    -DCMAKE_C_COMPILER=clang-${{ matrix.llvm_version }} \
                    -DCMAKE_CXX_COMPILER=clang++-${{ matrix.llvm_version }} \
                    -DCMAKE_LINKER=lld-${{ matrix.llvm_version }} \
                    -DCMAKE_OBJCOPY=llvm-objcopy-${{ matrix.llvm_version }} \
                    -DCMAKE_STRIP=llvm-strip-${{ matrix.llvm_version }} \
                    -DCMAKE_DLLTOOL=llvm-dlltool-${{ matrix.llvm_version }} \
                    -DC3_LLVM_VERSION=auto && \
            cmake --build build && \
            cp -r build/c3c build/lib bin"

      - name: Run Unified Tests
        run: |
          docker run --rm \
            -u 0 \
            -v "$(pwd):/home/c3c/source" \
            -w /home/c3c/source \
            c3c-builder \
            bash -c "./scripts/tools/ci_tests.sh ./bin/c3c"

  build-nix:
    runs-on: ubuntu-22.04
    strategy:
      fail-fast: false
      matrix:
        build_type: [ Debug ]
        nixpkgs: [ Lock, Latest ]
    steps:
    - uses: actions/checkout@v6
    - uses: cachix/install-nix-action@v31
      with:
        github_access_token: ${{ secrets.GITHUB_TOKEN }}
    - name: Update flake
      if: matrix.nixpkgs == 'Latest'
      run: nix flake update
    - name: CMake build and run Unified Tests
      run: |
        CHECK_NAME=".#c3c-checks"
        if [[ ${{ matrix.build_type }} = "Debug" ]]; then CHECK_NAME=".#c3c-debug-checks"; fi
        nix build -L "$CHECK_NAME"

  build-android:
    strategy:
      fail-fast: false
      matrix:
        build_type: [ Release, Debug ]
        architecture: [ aarch64, x86_64 ]
        include:
          - architecture: aarch64
            runner: ubuntu-24.04-arm
          - architecture: x86_64
            runner: ubuntu-24.04
    runs-on: ${{matrix.runner}}
    container:
      image: termux/termux-docker:${{matrix.architecture}}
      volumes:
        - /tmp/node20:/__e/node20
        - /tmp/node24:/__e/node24
    env:
      TERMUX_MAIN_PACKAGE_FORMAT: debian
      ANDROID_ROOT: /system
      ANDROID_DATA: /data
      PREFIX: /data/data/com.termux/files/usr
      HOME: /data/data/com.termux/files/home
      PATH: /data/data/com.termux/files/usr/bin
      TMPDIR: /data/data/com.termux/files/usr/tmp
      LANG: en_US.UTF-8
      TZ: UTC
    steps:
      - name: prepare termux
        run: |
          ln -sf ${PREFIX}/etc/termux/mirrors/default ${PREFIX}/etc/termux/chosen_mirrors
          for i in 1 2; do /entrypoint.sh pkg update && break || sleep 5; done
          /entrypoint.sh bash -c "yes | pkg upgrade -y"
          chmod -R o+x ${PREFIX}/bin
          for i in 1 2; do /entrypoint.sh pkg install -y nodejs-lts tar git && break || sleep 5; done
          # Symlink Termux node to where GHA expects it
          mkdir -p /__e/node20/bin /__e/node24/bin || true
          ln -sf ${PREFIX}/bin/node /__e/node20/bin/node || true
          ln -sf ${PREFIX}/bin/node /__e/node24/bin/node || true

      - name: Get current date context
        id: date
        run: echo "date=$(date +'${{ env.CACHE_INVALIDATION_SEED }}')" >> $GITHUB_OUTPUT

      - name: Cache Termux packages
        uses: actions/cache@v5
        with:
          path: /data/data/com.termux/cache/apt/archives/
          key: termux-cache-${{ matrix.architecture }}-${{ steps.date.outputs.date }}

      - uses: actions/checkout@v6

      - name: fix permissions after checkout
        run: chown -R 1000:1000 .

      - name: setup
        run: |
          for i in 1 2; do \
            /entrypoint.sh pkg install -y llvm binutils libgc build-essential cmake git libedit zlib clang make mlir llvm-tools libpolly python libllvm-static && break || sleep 10; \
          done

      - name: build
        run: |
          cmake -Bbuild -DCMAKE_BUILD_TYPE=${{matrix.build_type}}
          cmake --build build

      - name: Run Unified Tests
        if: matrix.build_type == 'Debug'
        run: ./scripts/tools/ci_tests.sh "./build/c3c" "android"

      - name: bundle_output
        run: |
          chmod +x ./scripts/tools/package_build.sh
          ./scripts/tools/package_build.sh "./build/c3c" "c3-android-${{matrix.architecture}}-${{matrix.build_type}}" "tar"

      - name: upload artifacts
        uses: actions/upload-artifact@v4
        with:
          name: c3-android-${{matrix.architecture}}-${{matrix.build_type}}
          path: c3-android-${{matrix.architecture}}-${{matrix.build_type}}.tar.gz

  release:
    runs-on: ubuntu-22.04
    needs: [build-msvc, build-linux, build-mac, build-linux-alpine, build-openbsd, build-netbsd, build-android]
    if: github.ref == 'refs/heads/master'
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
      - uses: actions/checkout@v6
      - uses: actions/download-artifact@v4

      - name: Prepare Assets
        run: |
          # --- Release Assets ---
          mv c3-windows-Release/c3-windows-Release.zip c3-windows.zip
          mv c3-macos-Release/c3-macos-Release.zip c3-macos.zip

          mv c3-linux-Release/c3-linux-Release.tar.gz c3-linux.tar.gz
          mv c3-linux-musl-Release/c3-linux-musl-Release.tar.gz c3-linux-musl.tar.gz
          mv c3-openbsd-Release/c3-openbsd-Release.tar.gz c3-openbsd.tar.gz || true
          mv c3-netbsd-Release/c3-netbsd-Release.tar.gz c3-netbsd.tar.gz || true
          mv c3-android-aarch64-Release/c3-android-aarch64-Release.tar.gz c3-android-aarch64.tar.gz
          mv c3-android-x86_64-Release/c3-android-x86_64-Release.tar.gz c3-android-x86_64.tar.gz

          # --- Debug Assets ---
          mv c3-windows-Debug/c3-windows-Debug.zip c3-windows-debug.zip
          mv c3-macos-Debug/c3-macos-Debug.zip c3-macos-debug.zip

          mv c3-linux-Debug/c3-linux-Debug.tar.gz c3-linux-debug.tar.gz
          mv c3-linux-musl-Debug/c3-linux-musl-Debug.tar.gz c3-linux-musl-debug.tar.gz
          mv c3-openbsd-Debug/c3-openbsd-Debug.tar.gz c3-openbsd-debug.tar.gz || true
          mv c3-netbsd-Debug/c3-netbsd-Debug.tar.gz c3-netbsd-debug.tar.gz || true
          mv c3-android-aarch64-Debug/c3-android-aarch64-Debug.tar.gz c3-android-aarch64-debug.tar.gz
          mv c3-android-x86_64-Debug/c3-android-x86_64-Debug.tar.gz c3-android-x86_64-debug.tar.gz

      - run: gh release delete latest-prerelease-tag --cleanup-tag -y || true
      - run: echo "RELEASE_NAME=latest-prerelease-$(date +'%Y%m%d-%H%M')" >> $GITHUB_ENV

      - uses: softprops/action-gh-release@v2
        with:
          tag_name: latest-prerelease-tag
          name: ${{ env.RELEASE_NAME }}
          prerelease: true
          files: |
            c3-windows.zip
            c3-macos.zip
            c3-linux.tar.gz
            c3-linux-musl.tar.gz
            c3-openbsd.tar.gz
            c3-netbsd.tar.gz
            c3-android-aarch64.tar.gz
            c3-android-x86_64.tar.gz
            # --- Debug Artifacts ---
            c3-windows-debug.zip
            c3-macos-debug.zip
            c3-linux-debug.tar.gz
            c3-linux-musl-debug.tar.gz
            c3-openbsd-debug.tar.gz
            c3-netbsd-debug.tar.gz
            c3-android-aarch64-debug.tar.gz
            c3-android-x86_64-debug.tar.gz