SWITCH on version format: SEMVER: install_from_semver REMOTE TAR FILE URL: install_from_tar_url LOCAL FILE PATH: install_from_local_path
install_from_semver: (local cache index lookup by semver expression) IF cache hit: (install this module from cache) ELSE: (list module versions in local cache) IF a version in cache fulfills semver expression: (add semver expression to cache index) (retrieve module from cache by semver expression) (install this module from cache) --END-- ELSE (Generate list of module versions from remote server) IF a remote module version fulfills semver expression: (download remote module by tar url) (cache module by tar url) (cache module by semver expression) (install module) ELSE error!!! --END--
install_from_tar_url: (local cache index lookup by tar url) IF cache hit: (install this module from cache) ELSE: (download remote module by tar url) (cache module by tar url) (install module)
install_from_local_path (copy module from local path)