From a6b63b96f9a5f07dabbe195b16d00d778d3246ff Mon Sep 17 00:00:00 2001
From: Laurenz <laurmaedje@gmail.com>
Date: Tue, 21 Mar 2023 23:39:09 +0100
Subject: [PATCH] Fail gracefully if `git` does not exist

---
 cli/build.rs    | 14 ++++++++------
 cli/src/main.rs |  2 +-
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/cli/build.rs b/cli/build.rs
index f7b70e7f8..afaed6578 100644
--- a/cli/build.rs
+++ b/cli/build.rs
@@ -1,9 +1,11 @@
-use std::error::Error;
 use std::process::Command;
 
-fn main() -> Result<(), Box<dyn Error>> {
-    let output = Command::new("git").args(&["rev-parse", "HEAD"]).output()?;
-    let hash = std::str::from_utf8(&output.stdout)?;
-    println!("cargo:rustc-env=TYPST_HASH={}", &hash[..8]);
-    Ok(())
+fn main() {
+    let version = Command::new("git")
+        .args(&["rev-parse", "HEAD"])
+        .output()
+        .ok()
+        .and_then(|output| String::from_utf8(output.stdout[..8].into()).ok())
+        .unwrap_or_else(|| "(unknown version)".into());
+    println!("cargo:rustc-env=TYPST_VERSION={version}");
 }
diff --git a/cli/src/main.rs b/cli/src/main.rs
index 3f41ac782..dfb13aaa1 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -156,7 +156,7 @@ fn print_help(help: &'static str) -> ! {
 
 /// Print the version hash and quit.
 fn print_version() -> ! {
-    println!("typst {}", env!("TYPST_HASH"));
+    println!("typst {}", env!("TYPST_VERSION"));
     std::process::exit(0);
 }