logging: include version information

build/logging.rs

@@ -1,5 +1,30 @@
+use {
+    crate::open,
+    std::{fmt::Write as _, io::Write as _, process::Command},
+};
+
 pub fn main() -> anyhow::Result<()> {
+    create_bridge()?;
+    create_version()?;
+    Ok(())
+}
+
+fn create_bridge() -> anyhow::Result<()> {
     println!("cargo:rerun-if-changed=src/bridge.c");
     cc::Build::new().file("src/bridge.c").compile("bridge");
     Ok(())
 }
+
+fn create_version() -> anyhow::Result<()> {
+    let mut version_string = env!("CARGO_PKG_VERSION").to_string();
+    if let Ok(output) = Command::new("git").arg("rev-parse").arg("HEAD").output() {
+        if output.status.success() {
+            if let Ok(commit) = std::str::from_utf8(&output.stdout) {
+                write!(version_string, " ({})", commit.trim())?;
+            }
+        }
+    }
+    let mut f = open("version.rs")?;
+    writeln!(f, "pub const VERSION: &str = \"{}\";", version_string)?;
+    Ok(())
+}