Use built to determine version information

cli/build.rs

@@ -1,34 +1,3 @@
-use std::process::Command;
-
 fn main() {
-    // Query HEAD revision and expose as $TC_GIT_REV during build
-    //
-    // Adapted from https://stackoverflow.com/questions/43753491
-    let cmd = Command::new("git")
-        .args(&["rev-parse", "--short", "HEAD"])
-        .spawn()
-        // Wait for process to exit
-        .and_then(|cmd| cmd.wait_with_output())
-        // Handle error if failed to launch git
-        .map_err(|_e| println!("cargo:warning=Failed to run 'git' to determine HEAD rev"))
-        // Remap to Some/None for simpler error handling
-        .ok()
-        // Handle command failing
-        .and_then(|o| {
-            if o.status.success() {
-                Some(o)
-            } else {
-                println!(
-                    "cargo:warning='git' exited with non-zero exit code while determining HEAD rev"
-                );
-                None
-            }
-        })
-        // Get output as UTF-8 string
-        .map(|out| String::from_utf8(out.stdout).expect("Invalid output in stdout"));
-
-    // Only output git rev if successful
-    if let Some(h) = cmd {
-        println!("cargo:rustc-env=TC_GIT_REV={}", h);
-    }
+    built::write_built_file().expect("Failed to acquire build-time information");
 }