Source code for spack.caches

# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

"""Caches used by Spack to store data"""
import os

import llnl.util.lang
from llnl.util.filesystem import mkdirp

import spack.config
import spack.error
import spack.fetch_strategy
import spack.paths
import spack.util.file_cache
import spack.util.path

[docs]def misc_cache_location(): """The ``misc_cache`` is Spack's cache for small data. Currently the ``misc_cache`` stores indexes for virtual dependency providers and for which packages provide which tags. """ path = spack.config.get('config:misc_cache', spack.paths.default_misc_cache_path) return spack.util.path.canonicalize_path(path)
def _misc_cache(): path = misc_cache_location() return spack.util.file_cache.FileCache(path) #: Spack's cache for small data misc_cache = llnl.util.lang.Singleton(_misc_cache)
[docs]def fetch_cache_location(): """Filesystem cache of downloaded archives. This prevents Spack from repeatedly fetch the same files when building the same package different ways or multiple times. """ path = spack.config.get('config:source_cache') if not path: path = spack.paths.default_fetch_cache_path path = spack.util.path.canonicalize_path(path) return path
def _fetch_cache(): path = fetch_cache_location() return spack.fetch_strategy.FsCache(path)
[docs]class MirrorCache(object): def __init__(self, root, skip_unstable_versions): self.root = os.path.abspath(root) self.skip_unstable_versions = skip_unstable_versions
[docs] def store(self, fetcher, relative_dest): """Fetch and relocate the fetcher's target into our mirror cache.""" # Note this will archive package sources even if they would not # normally be cached (e.g. the current tip of an hg/git branch) dst = os.path.join(self.root, relative_dest) mkdirp(os.path.dirname(dst)) fetcher.archive(dst)
#: Spack's local cache for downloaded source archives fetch_cache = llnl.util.lang.Singleton(_fetch_cache)