Add CI (#3)

.github/workflows/rust.yml

@@ -0,0 +1,64 @@
+name: Rust CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: dtolnay/rust-toolchain@stable
+    - name: Cache Cargo Dependencies
+      uses: Swatinem/rust-cache@v2
+      with:
+        cache-on-failure: true
+    - name: build
+      run: cargo build
+    - name: test
+      run: cargo test
+
+  test_other_archs:
+    # github actions does not support 32-bit or big endian systems directly, but
+    # it does support QEMU. so we install qemu, then build and run the tests in
+    # an emulated system. NOTE: you can also use this approach to test for big
+    # endian locally.
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [powerpc-unknown-linux-gnu, i686-unknown-linux-gnu]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install or use cached cross-rs/cross
+        uses: baptiste0928/cargo-install@v2
+        with:
+          crate: cross
+      - name: Cache Cargo Dependencies
+        uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
+          key: ${{ matrix.arch }}
+      - name: Start Docker (required for cross-rs)
+        run: sudo systemctl start docker
+      - name: Cross-Run Tests using QEMU
+        run: cross test --target ${{ matrix.arch }}
+
+  rustfmt:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: dtolnay/rust-toolchain@stable
+      with:
+        components: rustfmt
+    - name: Run rustfmt check
+      run: cargo fmt -- --check
+
+  cargo-deny:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: EmbarkStudios/cargo-deny-action@v1

Cargo.toml

@@ -1,19 +1,19 @@
 [package]
 name = "image-extras"
 version = "0.1.0"
-edition = "2024"
+edition = "2021"
 license = "MIT OR Apache-2.0"
 publish = false
 
 include = ["src", "tests/reference.rs"]
 
 [features]
 default = ["pcx"]
-pcx = []
+pcx = ["dep:pcx"]
 
 [dependencies]
 image = { version = "0.25.5", default-features = false }
-pcx = "0.2.4"
+pcx = { version = "0.2.4", optional = true }
 
 [dev-dependencies]
 image = { version = "0.25.5", default-features = false, features = ["png"] }

deny.toml

@@ -0,0 +1,37 @@
+# https://embarkstudios.github.io/cargo-deny/
+
+[graph]
+targets = [
+    { triple = "aarch64-apple-darwin" },
+    { triple = "aarch64-linux-android" },
+    { triple = "x86_64-apple-darwin" },
+    { triple = "x86_64-pc-windows-msvc" },
+    { triple = "x86_64-unknown-linux-gnu" },
+    { triple = "x86_64-unknown-linux-musl" },
+]
+
+
+[licenses]
+confidence-threshold = 0.93
+allow = [
+    "Apache-2.0 WITH LLVM-exception",
+    "Apache-2.0",
+    "BSD-2-Clause",
+    "BSD-3-Clause",
+    "MIT",
+    "MIT-0",
+    "MPL-2.0",
+    "Unicode-DFS-2016",
+]
+
+
+[advisories]
+yanked = "deny"
+ignore = []
+
+
+[bans]
+multiple-versions = "allow"
+wildcards = "allow" # at least until https://github.com/EmbarkStudios/cargo-deny/issues/241 is fixed
+deny = []
+