Support bare repository

Author: lusingander

src/git.rs

@@ -223,17 +223,31 @@ impl Repository {
 }
 
 fn check_git_repository(path: &Path) -> Result<()> {
+    if !is_inside_work_tree(path) && !is_bare_repository(path) {
+        let msg = "not a git repository (or any of the parent directories)";
+        return Err(msg.into());
+    }
+    Ok(())
+}
+
+fn is_inside_work_tree(path: &Path) -> bool {
     let output = Command::new("git")
         .arg("rev-parse")
         .arg("--is-inside-work-tree")
         .current_dir(path)
         .output()
         .unwrap();
-    if !output.status.success() || output.stdout == b"false\n" {
-        let msg = "not a git repository (or any of the parent directories)";
-        return Err(msg.into());
-    }
-    Ok(())
+    output.status.success() && output.stdout == b"true\n"
+}
+
+fn is_bare_repository(path: &Path) -> bool {
+    let output = Command::new("git")
+        .arg("rev-parse")
+        .arg("--is-bare-repository")
+        .current_dir(path)
+        .output()
+        .unwrap();
+    output.status.success() && output.stdout == b"true\n"
 }
 
 fn load_all_commits(path: &Path, sort: SortCommit, stashes: &[Commit]) -> Vec<Commit> {