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build.rs
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build.rs
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use std::env;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
use std::process::Command;
fn main() {
// Fetch git commit.
if let Ok(output) = Command::new("git").args(["rev-parse", "HEAD"]).output() {
let git_hash = String::from_utf8(output.stdout).unwrap();
println!("cargo:rustc-env=SERIAL={}", git_hash);
} else {
println!("cargo:rustc-env=SERIAL={}", env!("CARGO_PKG_VERSION"));
}
// Put `memory.x` in our output directory and ensure it's
// on the linker search path.
let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
File::create(out.join("memory.x"))
.unwrap()
.write_all(include_bytes!("memory.x"))
.unwrap();
println!("cargo:rustc-link-search={}", out.display());
// By default, Cargo will re-run a build script whenever
// any file in the project changes. By specifying `memory.x`
// here, we ensure the build script is only re-run when
// `memory.x` is changed.
println!("cargo:rerun-if-changed=memory.x");
}