Expose build identity in version output

Cargo.lock

@@ -436,7 +436,7 @@ dependencies = [
 
 [[package]]
 name = "dosh"
-version = "0.1.1"
+version = "0.1.2"
 dependencies = [
  "anyhow",
  "base64",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dosh"
-version = "0.1.1"
+version = "0.1.2"
 edition = "2024"
 license = "MIT"
 

build.rs

@@ -0,0 +1,26 @@
+use std::process::Command;
+
+fn git(args: &[&str]) -> Option<String> {
+    let output = Command::new("git").args(args).output().ok()?;
+    if !output.status.success() {
+        return None;
+    }
+    let text = String::from_utf8(output.stdout).ok()?;
+    Some(text.trim().to_string())
+}
+
+fn main() {
+    println!("cargo:rerun-if-changed=.git/HEAD");
+    println!("cargo:rerun-if-changed=.git/index");
+
+    let hash = git(&["rev-parse", "--short=12", "HEAD"]).unwrap_or_else(|| "unknown".into());
+    let date = git(&["show", "-s", "--format=%cs", "HEAD"]).unwrap_or_else(|| "unknown".into());
+    let dirty = Command::new("git")
+        .args(["diff", "--quiet", "--ignore-submodules", "--"])
+        .status()
+        .map(|status| if status.success() { "" } else { "+dirty" })
+        .unwrap_or("");
+
+    println!("cargo:rustc-env=DOSH_GIT_HASH={hash}{dirty}");
+    println!("cargo:rustc-env=DOSH_COMMIT_DATE={date}");
+}

src/bin/dosh-auth.rs

@@ -5,6 +5,11 @@ use dosh::config::load_server_config;
 use dosh::native::{host_public_key, host_public_key_line, load_or_create_host_key};
 
 #[derive(Debug, Parser)]
+#[command(
+    name = "dosh-auth",
+    version = dosh::build_info::VERSION,
+    long_version = dosh::build_info::LONG_VERSION
+)]
 struct Args {
     #[arg(long, default_value_t = 1)]
     protocol: u8,

src/bin/dosh-bench.rs

@@ -11,7 +11,11 @@ use std::sync::mpsc;
 use std::time::{Duration, Instant};
 
 #[derive(Debug, Parser)]
-#[command(name = "dosh-bench")]
+#[command(
+    name = "dosh-bench",
+    version = dosh::build_info::VERSION,
+    long_version = dosh::build_info::LONG_VERSION
+)]
 struct Args {
     #[arg(long, default_value = "local")]
     server: String,

src/bin/dosh-client.rs

@@ -69,7 +69,11 @@ fn terminal_size() -> (u16, u16) {
 }
 
 #[derive(Debug, Clone, Parser)]
-#[command(name = "dosh-client", version)]
+#[command(
+    name = "dosh-client",
+    version = dosh::build_info::VERSION,
+    long_version = dosh::build_info::LONG_VERSION
+)]
 struct Args {
     #[arg()]
     server: Option<String>,

src/bin/dosh-server.rs

@@ -51,7 +51,11 @@ static AGENT_SOCK_COUNTER: AtomicU64 = AtomicU64::new(0);
 const NATIVE_HANDSHAKE_TTL_SECS: u64 = 30;
 
 #[derive(Debug, Parser)]
-#[command(name = "dosh-server")]
+#[command(
+    name = "dosh-server",
+    version = dosh::build_info::VERSION,
+    long_version = dosh::build_info::LONG_VERSION
+)]
 struct Args {
     #[command(subcommand)]
     command: Command,

src/build_info.rs

@@ -0,0 +1,11 @@
+pub const VERSION: &str = env!("CARGO_PKG_VERSION");
+pub const GIT_HASH: &str = env!("DOSH_GIT_HASH");
+pub const COMMIT_DATE: &str = env!("DOSH_COMMIT_DATE");
+pub const LONG_VERSION: &str = concat!(
+    env!("CARGO_PKG_VERSION"),
+    " (",
+    env!("DOSH_GIT_HASH"),
+    ", ",
+    env!("DOSH_COMMIT_DATE"),
+    ")"
+);

src/lib.rs

@@ -1,4 +1,5 @@
 pub mod auth;
+pub mod build_info;
 pub mod config;
 pub mod crypto;
 pub mod native;