From 4feb21e7fc4c16255d40240457267e63a3d75a16 Mon Sep 17 00:00:00 2001
From: Kai Jan Kriegel <kai@kjkriegel.de>
Date: Wed, 16 Mar 2022 05:42:56 +0100
Subject: [PATCH] allow bffh to build outside of a git repo

---
 build.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/build.rs b/build.rs
index 733c61e..02b3add 100644
--- a/build.rs
+++ b/build.rs
@@ -17,7 +17,10 @@ fn main() {
     let owned_gitrev = String::from_utf8(out.stdout)
         .expect("git rev-list output was not valid UTF8");
     let gitrev = owned_gitrev.trim();
-    let abbrev = &gitrev[0..9];
+    let abbrev = match gitrev.len(){
+        0 => "unknown",
+        _ => &gitrev[0..9],
+    };
     println!("cargo:rustc-env=CARGO_PKG_VERSION_GITREV={}", gitrev);
 
     let out = Command::new("git").arg("log")