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support conditional compilation of Nix C APIs

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This commit is contained in:
do butterflies cry? 2026-03-27 10:38:56 +10:00
parent 7756365941
commit 1e23515fc1
Signed by: cry
GPG key ID: F68745A836CA0412
12 changed files with 198 additions and 63 deletions
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57
nixide-sys/build.rs
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@ -20,17 +20,26 @@ impl ParseCallbacks for DoxygenCallbacks {
fn main() {
// Invalidate the built crate whenever the wrapper changes
println!("cargo:rerun-if-changed=include/wrapper.h");
println!("cargo:rerun-if-changed=include/nix-util.h");
println!("cargo:rerun-if-changed=include/nix-store.h");
println!("cargo:rerun-if-changed=include/nix-expr.h");
println!("cargo:rerun-if-changed=include/nix-fetchers.h");
println!("cargo:rerun-if-changed=include/nix-flake.h");
println!("cargo:rerun-if-changed=include/nix-main.h");
// Use pkg-config to find nix-store include and link paths
// This NEEDS to be included, or otherwise `nix_api_store.h` cannot
// be found.
let libs = [
"nix-main-c",
"nix-expr-c",
"nix-store-c",
#[cfg(feature = "nix-util-c")]
"nix-util-c",
#[cfg(feature = "nix-store-c")]
"nix-store-c",
#[cfg(feature = "nix-expr-c")]
"nix-expr-c",
#[cfg(feature = "nix-fetchers-c")]
"nix-fetchers-c",
#[cfg(feature = "nix-flake-c")]
"nix-flake-c",
#[cfg(feature = "nix-main-c")]
"nix-main-c",
];
let lib_args: Vec<String> = libs
@ -50,17 +59,43 @@ fn main() {
.flatten()
.collect();
let bindings = bindgen::Builder::default()
let mut builder = bindgen::Builder::default()
.clang_args(lib_args)
// The input header we would like to generate bindings for
.header("include/wrapper.h")
// Invalidate the built crate when an included header file changes
.parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
// Add `doxygen_bindgen` callbacks
.parse_callbacks(Box::new(DoxygenCallbacks))
// Format generated bindings with rustfmt
.formatter(bindgen::Formatter::Rustfmt)
.rustfmt_configuration_file(std::fs::canonicalize(".rustfmt.toml").ok())
.rustfmt_configuration_file(std::fs::canonicalize(".rustfmt.toml").ok());
// The input headers we would like to generate bindings for
#[cfg(feature = "nix-util-c")]
{
builder = builder.header("include/nix-util.h")
}
#[cfg(feature = "nix-store-c")]
{
builder = builder.header("include/nix-store.h")
}
#[cfg(feature = "nix-expr-c")]
{
builder = builder.header("include/nix-expr.h")
}
#[cfg(feature = "nix-fetchers-c")]
{
builder = builder.header("include/nix-fetchers.h")
}
#[cfg(feature = "nix-flake-c")]
{
builder = builder.header("include/nix-flake.h")
}
#[cfg(feature = "nix-main-c")]
{
builder = builder.header("include/nix-main.h")
}
let bindings = builder
// Finish the builder and generate the bindings
.generate()
// Unwrap the Result and panic on failure