Function resolve_git_common_dir

src/repo_utils.rs:122–133

Resolves the common git directory (the main repository's `.git`). Uses `git rev-parse --git-common-dir` to find the shared `.git` directory. In a normal repository, this is the repo's `.git` directory. In a worktree, this points to the main repository's `.git` directory.

(repo_path: &Path)

/// In a normal repository, this is the repo's `.git` directory.
/// In a worktree, this points to the main repository's `.git` directory.
pub fn resolve_git_common_dir(repo_path: &Path) -> Result<PathBuf, Box<dyn Error>> {
    let result = run_git_rev_parse(repo_path, &["--git-common-dir"])?;
    let common_dir = Path::new(&result);
    let resolved = if common_dir.is_absolute() {
        common_dir.to_path_buf()
    } else {
        repo_path.join(common_dir)
    };
    resolved
        .canonicalize()
        .map_err(|e| format!("Cannot resolve common dir {}: {e}", resolved.display()).into())
}

/// Find the worktree root directory from a starting path.
///