New package cbindgen

cbindgen.yaml

@@ -0,0 +1,50 @@
+package:
+  name: cbindgen
+  version: 0.26.0
+  epoch: 0
+  description: Tool to generate C bindings from Rust code
+  copyright:
+    - license: MPL-2.0
+
+environment:
+  contents:
+    packages:
+      - build-base
+      - busybox
+      - rust
+
+pipeline:
+  - uses: git-checkout
+    with:
+      repository: https://github.com/mozilla/cbindgen
+      tag: v${{package.version}}
+      expected-commit: 703b53c06f9fe2dbc0193d67626558cfa84a0f62
+
+  - runs: |
+      cargo build --release
+      mkdir -p ${{targets.destdir}}/usr/bin
+      cp target/release/cbindgen ${{targets.destdir}}/usr/bin/
+
+test:
+  environment:
+    contents:
+      packages:
+        - wolfi-base
+        - rustup
+  pipeline:
+    - runs: |
+        # We need to install nightly rust because cbindgen uses a nightly
+        # feature (-Zunpretty=expanded).
+        rustup install nightly
+        ARCH=$(uname -m)
+        export PATH="$HOME/.rustup/toolchains/nightly-${ARCH}-unknown-linux-gnu/bin:$PATH"
+        cbindgen --version
+        cbindgen --help
+        cbindgen --config cbindgen.toml --crate bitfield --output my_header.h --lang c
+        cat my_header.h
+
+update:
+  enabled: true
+  github:
+    identifier: mozilla/cbindgen
+    strip-prefix: v

cbindgen/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "bitfield"
+version = "0.1.0"
+authors = ["cbindgen"]
+
+[features]
+cbindgen = []

cbindgen/cbindgen.toml

@@ -0,0 +1,3 @@
+[parse.expand]
+crates = ["bitfield"]
+features = ["cbindgen"]

cbindgen/src/lib.rs

@@ -0,0 +1,15 @@
+#[repr(C)]
+pub struct HasBitfields {
+    #[cfg(not(feature = "cbindgen"))]
+    foo_and_bar: u64,
+
+    #[cfg(feature = "cbindgen")]
+    /// cbindgen:bitfield=8
+    foo: u64,
+    #[cfg(feature = "cbindgen")]
+    /// cbindgen:bitfield=56
+    bar: u64,
+}
+
+#[no_mangle]
+pub extern "C" fn root(_: &HasBitfields) {}