pub fn conventional_paths() -> Vec<PathBuf>Expand description
Conventional catalog paths for the current OS, in priority
order. These are the locations libxml2 (and the wider XML
toolchain) historically check when no XML_CATALOG_FILES
override is present. Used by discover_catalog_paths as
the fallback list.
Exposed separately so callers (and tests) can reason about the platform-specific path list without going through the env-var check.