1 files changed, 81 insertions, 0 deletions
diff --git a/hidapi-sys/build.rs b/hidapi-sys/build.rs
new file mode 100644
index 0000000..6ad9197
--- /dev/null
+++ b/hidapi-sys/build.rs
@@ -0,0 +1,81 @@
+extern crate gcc;
+extern crate pkg_config;
+
+use std::env;
+use std::io;
+use std::path::PathBuf;
+use std::process::Command;
+
+fn main() {
+	if env::var("CARGO_FEATURE_BUILD").is_err() {
+		return;
+	}
+
+	fetch().unwrap();
+	build().unwrap();
+
+	println!("cargo:rustc-link-search=native={}", output().to_string_lossy());
+}
+
+fn output() -> PathBuf {
+	PathBuf::from(env::var("OUT_DIR").unwrap())
+}
+
+fn source() -> PathBuf {
+	output().join("hidapi")
+}
+
+fn fetch() -> io::Result<()> {
+	Command::new("git")
+		.current_dir(&output())
+		.arg("clone")
+		.arg("https://github.com/signal11/hidapi.git")
+		.arg("hidapi")
+		.status()?;
+
+	Ok(())
+}
+
+#[cfg(target_os = "linux")]
+fn build() -> io::Result<()> {
+	let mut config = gcc::Config::new();
+
+	config.file(source().join("libusb/hid.c"));
+	config.include(source().join("hidapi"));
+
+	for path in pkg_config::find_library("libusb-1.0").unwrap().include_paths {
+		config.include(path.to_str().unwrap());
+	}
+
+	config.compile("libhidapi-libusb.a");
+
+	Ok(())
+}
+
+#[cfg(target_os = "macos")]
+fn build() -> io::Result<()> {
+	let mut config = gcc::Config::new();
+
+	config.file(source().join("libusb/hid.c"));
+	config.include(source().join("hidapi"));
+
+	for path in pkg_config::find_library("libusb-1.0").unwrap().include_paths {
+		config.include(path.to_str().unwrap());
+	}
+
+	config.compile("libhidapi.a");
+
+	Ok(())
+}
+
+#[cfg(target_os = "windows")]
+fn build() -> io::Result<()> {
+	let mut config = gcc::Config::new();
+
+	config.file(source().join("windows/hid.c"));
+	config.include(source().join("hidapi"));
+
+	config.compile("libhidapi.a");
+
+	Ok(())
+}