init commit

internal/domain/git/binary.go

@@ -45,12 +45,16 @@ func run(repoPath string, args ...string) ([]byte, error) {
 	return out, nil
 }
 
-// IsEmpty returns true when the repo has no commits yet.
-// Must use --verify: without it, rev-parse exits 0 in a bare empty repo
-// because HEAD is a valid symbolic ref even before the first commit.
+// IsEmpty returns true when the repo has no commits on any branch.
+// Uses for-each-ref so it doesn't depend on HEAD pointing to a valid branch
+// (bare repos created without --initial-branch default to master, but clients
+// may push to main, leaving HEAD dangling).
 func IsEmpty(repoPath string) bool {
-	_, err := run(repoPath, "rev-parse", "--verify", "HEAD")
-	return err != nil
+	out, err := run(repoPath, "for-each-ref", "--count=1", "refs/heads/")
+	if err != nil {
+		return true
+	}
+	return len(strings.TrimSpace(string(out))) == 0
 }
 
 func Init(path string) error {
@@ -59,10 +63,18 @@ func Init(path string) error {
 	if out, err := cmd.CombinedOutput(); err != nil {
 		return fmt.Errorf("git init --bare: %w: %s", err, out)
 	}
-	// Allow pushes over HTTP (git http-backend checks this config key)
+	env := []string{"GIT_TERMINAL_PROMPT=0", "HOME=/tmp"}
+
+	// Point HEAD at main so clients pushing 'main' don't leave a dangling HEAD.
+	head := exec.Command("git", "-C", path, "symbolic-ref", "HEAD", "refs/heads/main")
+	head.Env = env
+	_ = head.Run()
+
+	// Allow pushes over HTTP (git http-backend checks this config key).
 	cfg := exec.Command("git", "-C", path, "config", "http.receivepack", "true")
-	cfg.Env = []string{"GIT_TERMINAL_PROMPT=0", "HOME=/tmp"}
+	cfg.Env = env
 	_ = cfg.Run()
+
 	return nil
 }