Source code for spack.hash_types

# 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)

"""Definitions that control how Spack creates Spec hashes."""

import spack.dependency as dp

hashes = []

[docs]class SpecHashDescriptor(object): """This class defines how hashes are generated on Spec objects. Spec hashes in Spack are generated from a serialized (e.g., with YAML) representation of the Spec graph. The representation may only include certain dependency types, and it may optionally include a canonicalized hash of the for each node in the graph. We currently use different hashes for different use cases.""" def __init__(self, deptype, package_hash, name, override=None): self.deptype = dp.canonical_deptype(deptype) self.package_hash = package_hash = name hashes.append(self) # Allow spec hashes to have an alternate computation method self.override = override @property def attr(self): """Private attribute stored on spec""" return '_' +
#: Default Hash descriptor, used by Spec.dag_hash() and stored in the DB. dag_hash = SpecHashDescriptor( deptype=('link', 'run'), package_hash=False, name='hash') #: Hash descriptor that includes build dependencies. build_hash = SpecHashDescriptor( deptype=('build', 'link', 'run'), package_hash=False, name='build_hash') #: Hash descriptor used only to transfer a DAG, as is, across processes process_hash = SpecHashDescriptor( deptype=('build', 'link', 'run', 'test'), package_hash=False, name='process_hash' ) #: Full hash used in build pipelines to determine when to rebuild packages. full_hash = SpecHashDescriptor( deptype=('build', 'link', 'run'), package_hash=True, name='full_hash') #: Package hash used as part of full hash package_hash = SpecHashDescriptor( deptype=(), package_hash=True, name='package_hash', override=lambda s: s.package.content_hash())