Implement `ra_lsp_server --version`

1 files changed, 15 insertions, 0 deletions

diff --git a/crates/ra_lsp_server/build.rs b/crates/ra_lsp_server/build.rs
new file mode 100644
index 000000000..05f9772c0
--- /dev/null
+++ b/crates/ra_lsp_server/build.rs
@@ -0,0 +1,15 @@
+//! Just embed git-hash to `--version`
+
+use std::process::Command;
+
+fn main() {
+    let rev = rev().unwrap_or_else(|| "???????".to_string());
+    println!("cargo:rustc-env=REV={}", rev)
+}
+
+fn rev() -> Option<String> {
+    let output = Command::new("git").args(&["rev-parse", "HEAD"]).output().ok()?;
+    let stdout = String::from_utf8(output.stdout).ok()?;
+    let short_hash = stdout.get(0..7)?;
+    Some(short_hash.to_owned())
+}