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build.rs
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build.rs
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extern crate wayland_scanner;
use wayland_scanner::{Side, generate_code, generate_interfaces};
use std::env;
use std::process::Command;
use std::fs;
use std::io::Write;
use std::path::{Path, PathBuf};
fn main() {
dump_git_version();
generate_wayland_protocols();
}
/// Writes the current git hash to a file that is read by Way Cooler
///
/// If this is a release build, the file will be empty.
fn dump_git_version() {
let out_dir = env::var("OUT_DIR")
.expect("Could not find out directory!");
let dest_path = Path::new(&out_dir).join("git-version.txt");
let mut f = fs::File::create(&dest_path)
.expect("Could not write git version to out directory");
if let Some(git_version) = git_version() {
f.write_all(git_version.as_ref())
.expect("Could not write to git version file");
}
}
/// Gets the current hash of HEAD. Returns None if for some reason
/// that could not be retrieved (e.g not in a git repository)
fn git_version() -> Option<String> {
if !in_release_commit() {
Command::new("git")
.arg("rev-parse")
.arg("HEAD")
.output()
.ok()
.map(|output| output.stdout)
.map(|hash| String::from_utf8_lossy(&hash).trim().into())
} else {
None
}
}
/// Determines if the current HEAD is tagged with a release
fn in_release_commit() -> bool {
let result = Command::new("git")
.arg("describe")
.arg("--exact-match")
.arg("--tags")
.arg("HEAD")
.output().unwrap();
result.status.success()
}
fn generate_wayland_protocols() {
let protocols = fs::read_dir("./protocols")
.expect("No <Way Cooler>/protocols/ directory");
let out_dir = env::var("OUT_DIR").unwrap();
let out_dir = Path::new(&out_dir);
for protocol_path in protocols {
let protocol_path: fs::DirEntry = protocol_path.unwrap();
let path: PathBuf = protocol_path.path().into();
let mut file_name: String = protocol_path.file_name().into_string().unwrap();
if let Some(extension) = file_name.find(".xml") {
file_name.truncate(extension);
}
generate_code(
path.clone(),
out_dir.join(file_name.clone() + "_api.rs"),
Side::Server
);
generate_interfaces(
path,
out_dir.join(file_name + "_interface.rs")
);
}
}