Import protobuf-2.14.0
* Add OWNERS and Android.bp
* add generated version.rs into out
Bug: 143953733
Test: make
Change-Id: Ib53a973b74679c4dd78e2de2fa54141e55048c17
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..b0b1010
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,76 @@
+use std::env;
+use std::fs::File;
+use std::io::{Read, Write};
+use std::path::{Path, PathBuf};
+use std::process;
+
+// % rustc +stable --version
+// rustc 1.26.0 (a77568041 2018-05-07)
+// % rustc +beta --version
+// rustc 1.27.0-beta.1 (03fb2f447 2018-05-09)
+// % rustc +nightly --version
+// rustc 1.27.0-nightly (acd3871ba 2018-05-10)
+fn version_is_nightly(version: &str) -> bool {
+ version.contains("nightly")
+}
+
+fn main() {
+ let rustc = env::var("RUSTC").expect("RUSTC unset");
+
+ let mut child = process::Command::new(rustc)
+ .args(&["--version"])
+ .stdin(process::Stdio::null())
+ .stdout(process::Stdio::piped())
+ .spawn()
+ .expect("spawn rustc");
+
+ let mut rustc_version = String::new();
+
+ child
+ .stdout
+ .as_mut()
+ .expect("stdout")
+ .read_to_string(&mut rustc_version)
+ .expect("read_to_string");
+ assert!(child.wait().expect("wait").success());
+
+ if version_is_nightly(&rustc_version) {
+ println!("cargo:rustc-cfg=rustc_nightly");
+ }
+
+ write_version();
+}
+
+fn out_dir() -> PathBuf {
+ PathBuf::from(env::var("OUT_DIR").expect("OUT_DIR"))
+}
+
+fn version() -> String {
+ env::var("CARGO_PKG_VERSION").expect("CARGO_PKG_VERSION")
+}
+
+fn write_version() {
+ let version = version();
+ let version_ident = format!(
+ "VERSION_{}",
+ version.replace(".", "_").replace("-", "_").to_uppercase()
+ );
+ let mut file = File::create(Path::join(&out_dir(), "version.rs")).expect("open");
+ writeln!(file, "/// protobuf crate version").unwrap();
+ writeln!(file, "pub const VERSION: &'static str = \"{}\";", version).unwrap();
+ writeln!(file, "/// This symbol is used by codegen").unwrap();
+ writeln!(file, "#[doc(hidden)]").unwrap();
+ writeln!(
+ file,
+ "pub const VERSION_IDENT: &'static str = \"{}\";",
+ version_ident
+ )
+ .unwrap();
+ writeln!(
+ file,
+ "/// This symbol can be referenced to assert that proper version of crate is used"
+ )
+ .unwrap();
+ writeln!(file, "pub const {}: () = ();", version_ident).unwrap();
+ file.flush().unwrap();
+}