From 3af5b7b9397de6b6f14d4f96bc3d36efded4225b Mon Sep 17 00:00:00 2001
From: Rene Schallner <rene@renerocks.ai>
Date: Thu, 19 Jan 2023 12:41:25 +0100
Subject: [PATCH] no install of git hook if checked out as submodule

---
 build.zig | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/build.zig b/build.zig
index a02f249..1b9b7bf 100644
--- a/build.zig
+++ b/build.zig
@@ -142,6 +142,16 @@ fn ensureGit(allocator: std.mem.Allocator) void {
 }
 
 pub fn ensureGitHook(allocator: std.mem.Allocator) void {
+    // only check if we ourselves are not part of a submodule
+    var cwd = std.fs.cwd().openDir(sdkPath("/"), .{}) catch return;
+    defer cwd.close();
+    const dotgit = cwd.statFile(".git") catch return;
+    if (dotgit.kind == .File) {
+        // we are checked out as a submodule. No point in trying to install
+        // a hook
+        return;
+    }
+
     var child = std.ChildProcess.init(
         &.{ "cp", "precommit-hook.sh", ".git/hooks/pre-commit" },
         allocator,