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// Copyright 2024, Linaro Limited
// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
// SPDX-License-Identifier: GPL-2.0-or-later
#[cfg(unix)]
use std::os::unix::fs::symlink as symlink_file;
#[cfg(windows)]
use std::os::windows::fs::symlink_file;
use std::{env, fs::remove_file, io::Result, path::Path};
fn main() -> Result<()> {
let manifest_dir = env!("CARGO_MANIFEST_DIR");
let file = if let Ok(root) = env::var("MESON_BUILD_ROOT") {
let sub = get_rust_subdir(manifest_dir).unwrap();
format!("{root}/{sub}/bindings.inc.rs")
} else {
// Placing bindings.inc.rs in the source directory is supported
// but not documented or encouraged.
format!("{manifest_dir}/src/bindings.inc.rs")
};
let file = Path::new(&file);
if !Path::new(&file).exists() {
panic!(concat!(
"\n",
" No generated C bindings found! Maybe you wanted one of\n",
" `make clippy`, `make rustfmt`, `make rustdoc`?\n",
"\n",
" For other uses of `cargo`, start a subshell with\n",
" `pyvenv/bin/meson devenv`, or point MESON_BUILD_ROOT to\n",
" the top of the build tree."
));
}
let out_dir = env::var("OUT_DIR").unwrap();
let dest_path = format!("{out_dir}/bindings.inc.rs");
let dest_path = Path::new(&dest_path);
if dest_path.symlink_metadata().is_ok() {
remove_file(dest_path)?;
}
symlink_file(file, dest_path)?;
println!("cargo:rerun-if-changed=build.rs");
Ok(())
}
fn get_rust_subdir(path: &str) -> Option<&str> {
path.find("/rust").map(|index| &path[index + 1..])
}
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