Function has_project_database

src/config.rs:349–351

Returns true when the old repo-local `TraceDecay` graph DB exists at this root.

(project_root: &Path)

/// Returns true when the old repo-local `TraceDecay` graph DB exists at this root.
pub fn has_project_database(project_root: &Path) -> bool {
    project_root.join(TRACEDECAY_DIR).join(DB_FILENAME).exists()
}

/// User-level data directory. Runtime storage is always rooted at
/// `~/.tracedecay` unless `TRACEDECAY_DATA_DIR` explicitly overrides it.