cmux/.github/workflows/ci-macos-compat.yml

name: macOS Compatibility

on:
  push:
    branches:
      - main
  pull_request:

jobs:
  compat-tests:
    # Only run for the repo itself, not forks (GhosttyKit download needs repo access).
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
    strategy:
      fail-fast: false
      matrix:
        include:
          - os: warp-macos-15-arm64-6x
            timeout: 20
            smoke: true
            skip_zig: false
          - os: warp-macos-26-arm64-6x
            timeout: 20
            smoke: false
            skip_zig: true  # zig 0.15.2 MachO linker can't resolve libSystem on macOS 26
    runs-on: ${{ matrix.os }}
    timeout-minutes: ${{ matrix.timeout }}
    steps:
      - name: Checkout
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
        with:
          submodules: recursive

      - name: Select Xcode
        run: |
          set -euo pipefail
          # Pick the latest Xcode installed on the runner. GitHub-hosted macos-14
          # defaults to Xcode 15.4, but the project needs Xcode 16+ (Swift tools
          # version 6.0 required by sentry-cocoa).
          XCODE_APP="$(ls -d /Applications/Xcode_*.app 2>/dev/null | sort | tail -n 1)"
          if [ -z "$XCODE_APP" ]; then
            XCODE_APP="/Applications/Xcode.app"
          fi
          XCODE_DIR="$XCODE_APP/Contents/Developer"
          if [ ! -d "$XCODE_DIR" ]; then
            echo "No Xcode found under /Applications" >&2
            exit 1
          fi
          echo "Selected: $XCODE_APP"
          echo "DEVELOPER_DIR=$XCODE_DIR" >> "$GITHUB_ENV"
          export DEVELOPER_DIR="$XCODE_DIR"
          XCODE_VER="$(xcodebuild -version | head -1)"
          echo "XCODE_VER=$XCODE_VER" >> "$GITHUB_ENV"
          echo "$XCODE_VER"
          xcrun --sdk macosx --show-sdk-path
          sw_vers

      - name: Cache GhosttyKit.xcframework
        id: cache-ghosttykit
        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
        with:
          path: GhosttyKit.xcframework
          key: ghosttykit-${{ hashFiles('.gitmodules', 'ghostty') }}

      - name: Download pre-built GhosttyKit.xcframework
        if: steps.cache-ghosttykit.outputs.cache-hit != 'true'
        run: |
          ./scripts/download-prebuilt-ghosttykit.sh

      - name: Install zig
        if: ${{ !matrix.skip_zig }}
        run: |
          ZIG_REQUIRED="0.15.2"
          if command -v zig >/dev/null 2>&1 && zig version 2>/dev/null | grep -q "^${ZIG_REQUIRED}"; then
            echo "zig ${ZIG_REQUIRED} already installed"
          else
            echo "Installing zig ${ZIG_REQUIRED} from tarball"
            curl -fSL "https://ziglang.org/download/${ZIG_REQUIRED}/zig-aarch64-macos-${ZIG_REQUIRED}.tar.xz" -o /tmp/zig.tar.xz
            tar xf /tmp/zig.tar.xz -C /tmp
            sudo mkdir -p /usr/local/bin /usr/local/lib
            sudo cp -f /tmp/zig-aarch64-macos-${ZIG_REQUIRED}/zig /usr/local/bin/zig
            sudo cp -rf /tmp/zig-aarch64-macos-${ZIG_REQUIRED}/lib /usr/local/lib/zig
            export PATH="/usr/local/bin:$PATH"
            zig version
          fi

      - name: Cache DerivedData
        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
        with:
          path: ~/Library/Developer/Xcode/DerivedData/GhosttyTabs-*
          key: deriveddata-${{ matrix.os }}-${{ env.XCODE_VER }}-${{ hashFiles('GhosttyTabs.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved') }}-${{ hashFiles('GhosttyTabs.xcodeproj/project.pbxproj') }}
          restore-keys: |
            deriveddata-${{ matrix.os }}-${{ env.XCODE_VER }}-${{ hashFiles('GhosttyTabs.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved') }}-
            deriveddata-${{ matrix.os }}-${{ env.XCODE_VER }}-

      - name: Cache Swift packages
        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
        with:
          path: .ci-source-packages
          key: spm-${{ matrix.os }}-${{ hashFiles('GhosttyTabs.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved') }}
          restore-keys: spm-${{ matrix.os }}-

      - name: Resolve Swift packages
        run: |
          set -euo pipefail
          SOURCE_PACKAGES_DIR="$PWD/.ci-source-packages"
          mkdir -p "$SOURCE_PACKAGES_DIR"

          for attempt in 1 2 3; do
            if xcodebuild -project GhosttyTabs.xcodeproj -scheme cmux-unit -configuration Debug \
              -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_DIR" \
              -resolvePackageDependencies; then
              exit 0
            fi
            if [ "$attempt" -eq 3 ]; then
              echo "Failed to resolve Swift packages after 3 attempts" >&2
              exit 1
            fi
            echo "Package resolution failed on attempt $attempt, retrying..."
            sleep $((attempt * 5))
          done

      - name: Run unit tests
        env:
          CMUX_SKIP_ZIG_BUILD: ${{ matrix.skip_zig && '1' || '0' }}
        run: |
          set -euo pipefail
          SOURCE_PACKAGES_DIR="$PWD/.ci-source-packages"
          run_unit_tests() {
            xcodebuild -project GhosttyTabs.xcodeproj -scheme cmux-unit -configuration Debug \
              -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_DIR" \
              -disableAutomaticPackageResolution \
              -destination "platform=macOS" test 2>&1
          }

          set +e
          OUTPUT=$(run_unit_tests)
          EXIT_CODE=$?
          set -e

          # SwiftPM binary artifact resolution can occasionally fail on ephemeral
          # runners. Retry once after clearing caches.
          if [ "$EXIT_CODE" -ne 0 ] && echo "$OUTPUT" | grep -q "Could not resolve package dependencies"; then
            echo "SwiftPM package resolution failed, clearing caches and retrying once"
            rm -rf ~/Library/Caches/org.swift.swiftpm
            mkdir -p ~/Library/Caches/org.swift.swiftpm
            rm -rf ~/Library/Developer/Xcode/DerivedData/GhosttyTabs-*
            set +e
            OUTPUT=$(run_unit_tests)
            EXIT_CODE=$?
            set -e
          fi

          echo "$OUTPUT"
          if [ "$EXIT_CODE" -ne 0 ]; then
            SUMMARY=$(echo "$OUTPUT" | grep "Executed.*tests.*with.*failures" | tail -1)
            if echo "$SUMMARY" | grep -q "(0 unexpected)"; then
              echo "All failures are expected, treating as pass"
            else
              echo "Unexpected test failures detected"
              exit 1
            fi
          fi

      - name: Create virtual display
        if: matrix.smoke
        run: |
          set -euo pipefail
          echo "=== Display before ==="
          system_profiler SPDisplaysDataType 2>/dev/null || echo "(no display info)"
          echo ""
          clang -framework Foundation -framework CoreGraphics \
            -o /tmp/create-virtual-display scripts/create-virtual-display.m
          /tmp/create-virtual-display &
          VDISPLAY_PID=$!
          echo "VDISPLAY_PID=$VDISPLAY_PID" >> "$GITHUB_ENV"
          sleep 3
          echo "=== Display after ==="
          system_profiler SPDisplaysDataType 2>/dev/null || echo "(no display info)"

      - name: Build app for smoke test
        if: matrix.smoke
        run: |
          set -euo pipefail
          SOURCE_PACKAGES_DIR="$PWD/.ci-source-packages"
          xcodebuild -project GhosttyTabs.xcodeproj -scheme cmux -configuration Debug \
            -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_DIR" \
            -disableAutomaticPackageResolution \
            -destination "platform=macOS" build

      - name: Smoke test
        if: matrix.smoke
        run: |
          set -euo pipefail
          chmod +x scripts/smoke-test-ci.sh
          scripts/smoke-test-ci.sh