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c899071b5a
Move raw FFI bindings generation to separate crates. This makes it possible to reuse bindgen declarations for a header file in its dependencies (this was not the case before this change), while keeping multiple -sys crates to avoid rebuilding all the code whenever something changes. Because the -sys crates are generated in dependency order, this also enforces that the crates are organized in something that resembles the dependencies between C headers. The meson.build for rust-safe crates becomes simpler, and it should be possible in the future to let Meson's cargo support handle most of it. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> [General cleanup and Python script. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
50 lines
1.6 KiB
Rust
50 lines
1.6 KiB
Rust
// Copyright 2024, Linaro Limited
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// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
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// SPDX-License-Identifier: GPL-2.0-or-later
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#[cfg(unix)]
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use std::os::unix::fs::symlink as symlink_file;
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#[cfg(windows)]
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use std::os::windows::fs::symlink_file;
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use std::{env, fs::remove_file, io::Result, path::Path};
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fn main() -> Result<()> {
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let manifest_dir = env!("CARGO_MANIFEST_DIR");
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let root = env::var("MESON_BUILD_ROOT").expect(concat!(
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"\n",
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" MESON_BUILD_ROOT not found. Maybe you wanted one of\n",
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" `make clippy`, `make rustfmt`, `make rustdoc`?\n",
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"\n",
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" For other uses of `cargo`, start a subshell with\n",
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" `pyvenv/bin/meson devenv`, or point MESON_BUILD_ROOT to\n",
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" the top of the build tree."
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));
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let sub = get_rust_subdir(manifest_dir).unwrap();
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let file = format!("{root}/{sub}/bindings.inc.rs");
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let file = Path::new(&file);
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if !file.exists() {
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panic!(concat!(
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"\n",
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" No generated C bindings found! Run `make` first; or maybe you\n",
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" wanted one of `make clippy`, `make rustfmt`, `make rustdoc`?\n",
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));
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}
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let out_dir = env::var("OUT_DIR").unwrap();
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let dest_path = format!("{out_dir}/bindings.inc.rs");
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let dest_path = Path::new(&dest_path);
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if dest_path.symlink_metadata().is_ok() {
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remove_file(dest_path)?;
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}
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symlink_file(file, dest_path)?;
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println!("cargo:rerun-if-changed=build.rs");
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Ok(())
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}
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fn get_rust_subdir(path: &str) -> Option<&str> {
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path.find("/rust").map(|index| &path[index + 1..])
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}
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