fn newest_plugin_version(plugin_dir: &Path) -> Option<(PathBuf, DirComponents)>Expand description
The newest version dir of a cache plugin, with its inventory. A dir
that cannot be read - its own read_dir, or the stat of its
manifest - stops the search: an older version’s inventory shown as
this plugin’s own would be confidently wrong. Two arms fall through
instead: a vanished dir, and a dir carrying no manifest, which is
not a version dir at all.