CI: run on pull requests

Signed-off-by: Stephen Gutekanst <[email protected]>

.github/workflows/pr.yml

@@ -0,0 +1,66 @@
+name: CI
+on:
+  pull_request:
+    paths-ignore:
+      - "**.md"
+jobs:
+  all:
+    strategy:
+      matrix:
+        target: [
+          'x86_64-linux-gnu',
+          'x86_64-linux-musl',
+          'aarch64-linux-gnu',
+          'aarch64-linux-musl',
+          'x86_64-windows-gnu',
+          'aarch64-windows-gnu',
+          'x86_64-macos-none',
+          'aarch64-macos-none',
+        ]
+        optimize: [Debug, ReleaseFast]
+        include:
+          - target: 'x86_64-linux-gnu'
+            cpu: '-Dcpu=x86_64_v2'
+          - target: 'x86_64-linux-musl'
+            cpu: '-Dcpu=x86_64_v2'
+          - target: 'x86_64-windows-gnu'
+            cpu: '-Dcpu=x86_64_v2'
+          - target: 'x86_64-macos-none'
+            cpu: '-Dcpu=x86_64_v2'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Zig
+        run: |
+          sudo apt install xz-utils
+          sudo sh -c 'wget -c https://pkg.machengine.org/zig/zig-linux-x86_64-0.14.0-dev.1710+8ee52f99c.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
+      - name: build
+        run: zig build -Dfrom_source -Dtarget=${{ matrix.target }} -Doptimize=${{ matrix.optimize }} ${{ matrix.cpu }} install dxc
+  msvc:
+    # TODO: re-enable required MSVC builds
+    continue-on-error: true
+    strategy:
+      matrix:
+        target: [
+          'x86_64-windows-msvc',
+          # TODO: 'machine type x64 conflicts with arm64' during linking (zig bug)
+          # 'aarch64-windows-msvc',
+        ]
+        optimize: [Debug, ReleaseFast]
+        include:
+          - target: 'x86_64-windows-msvc'
+            cpu: '-Dcpu=x86_64_v2'
+    runs-on: windows-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Zig
+        run: |
+          $ProgressPreference = 'SilentlyContinue'
+          Invoke-WebRequest -Uri "https://pkg.machengine.org/zig/zig-windows-x86_64-0.14.0-dev.1710+8ee52f99c.zip" -OutFile "C:\zig.zip"
+          cd C:\
+          7z x zig.zip
+          Add-Content $env:GITHUB_PATH "C:\zig-windows-x86_64-0.14.0-dev.1710+8ee52f99c\"
+      - name: build
+        run: zig build -Dfrom_source -Dtarget=${{ matrix.target }} -Doptimize=${{ matrix.optimize }} ${{ matrix.cpu }} install dxc