Module routines 

Cache path helpers and installed-routine discovery.

Routines are stored under ProjectDirs::cache_dir():

cache/routines/<name>/<version>/<target_triple>/plugin/<library>
cache/routines/<name>/<version>/<target_triple>/descriptor.json

Version resolution

find_latest_installed_version and default run behavior use lexicographic sorting on version directory names. The last sorted entry is treated as “latest”. This is not semver-aware (e.g. 1.9.0 sorts after 1.10.0). Pin versions with run <name>@<version>.

Functions

cache_root

Root cache directory (proj_dirs.cache_dir()).

descriptor_path

Path to descriptor.json for an installed routine version and target.

find_latest_installed_version

Lexicographically greatest installed version directory name, if any.

host_target_triple

Host target triple from rustc -vV (host: line).

installed_routine_names

Sorted routine names that have at least one installed version directory.

installed_versions_for_routine

Version directory names for a routine, sorted lexicographically.

is_installed_for_target

Whether the plugin library file exists for the given routine, version, and target.

platform_library_filename

Platform-specific dynamic library filename for a routine name stem.

plugin_dir

cache/routines/<name>/<version>/<target_triple>/plugin.

plugin_library_path

Full path to the installed plugin dynamic library file.

routine_root

cache/routines/<name>.

routine_target_root

cache/routines/<name>/<version>/<target_triple>.

routine_version_root

cache/routines/<name>/<version>.

routines_root

cache/routines — parent of all installed routine names.