feat: add telemetry subcrate

subcrates/telemetry/build.rs

@@ -0,0 +1,33 @@
+use std::{env, fs::File, io::Write, process::Command};
+
+fn main() {
+    let out_dir = env::var("OUT_DIR").unwrap();
+    let mut f = File::create(format!("{}/built.rs", out_dir)).unwrap();
+
+    let commit_hash = Command::new("git")
+        .args(["rev-parse", "HEAD"])
+        .output()
+        .ok()
+        .and_then(|o| String::from_utf8(o.stdout).ok())
+        .unwrap_or_else(|| "unknown".into());
+
+    let commit_short_hash = Command::new("git")
+        .args(["rev-parse", "--short", "HEAD"])
+        .output()
+        .ok()
+        .and_then(|o| String::from_utf8(o.stdout).ok())
+        .unwrap_or_else(|| "unknown".into());
+
+    writeln!(
+        f,
+        "pub const GIT_COMMIT_HASH: &str = \"{}\";",
+        commit_hash.trim()
+    )
+    .unwrap();
+    writeln!(
+        f,
+        "pub const GIT_COMMIT_SHORT_HASH: &str = \"{}\";",
+        commit_short_hash.trim()
+    )
+    .unwrap();
+}