| #!/usr/bin/env python3 |
| # |
| # Copyright (C) 2017-2018 Codethink Limited |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU Lesser General Public |
| # License as published by the Free Software Foundation; either |
| # version 2 of the License, or (at your option) any later version. |
| # |
| # This library is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| # Lesser General Public License for more details. |
| # |
| # You should have received a copy of the GNU Lesser General Public |
| # License along with this library. If not, see <http://www.gnu.org/licenses/>. |
| # |
| # Authors: |
| # Tristan Maat <tristan.maat@codethink.co.uk> |
| |
| import os |
| from collections import Mapping, namedtuple |
| |
| from .._exceptions import ImplError, LoadError, LoadErrorReason |
| from .. import utils |
| from .. import _yaml |
| |
| |
| # An ArtifactCacheSpec holds the user configuration for a single remote |
| # artifact cache. |
| # |
| # Args: |
| # url (str): Location of the remote artifact cache |
| # push (bool): Whether we should attempt to push artifacts to this cache, |
| # in addition to pulling from it. |
| # |
| class ArtifactCacheSpec(namedtuple('ArtifactCacheSpec', 'url push')): |
| @staticmethod |
| def new_from_config_node(spec_node): |
| _yaml.node_validate(spec_node, ['url', 'push']) |
| url = _yaml.node_get(spec_node, str, 'url') |
| push = _yaml.node_get(spec_node, bool, 'push', default_value=False) |
| if not url: |
| provenance = _yaml.node_get_provenance(spec_node) |
| raise LoadError(LoadErrorReason.INVALID_DATA, |
| "{}: empty artifact cache URL".format(provenance)) |
| return ArtifactCacheSpec(url, push) |
| |
| |
| # artifact_cache_specs_from_config_node() |
| # |
| # Parses the configuration of remote artifact caches from a config block. |
| # |
| # Args: |
| # config_node (dict): The config block, which may contain the 'artifacts' key |
| # |
| # Returns: |
| # A list of ArtifactCacheSpec instances. |
| # |
| # Raises: |
| # LoadError, if the config block contains invalid keys. |
| # |
| def artifact_cache_specs_from_config_node(config_node): |
| cache_specs = [] |
| |
| artifacts = config_node.get('artifacts', []) |
| if isinstance(artifacts, Mapping): |
| cache_specs.append(ArtifactCacheSpec.new_from_config_node(artifacts)) |
| elif isinstance(artifacts, list): |
| for spec_node in artifacts: |
| cache_specs.append(ArtifactCacheSpec.new_from_config_node(spec_node)) |
| else: |
| provenance = _yaml.node_get_provenance(config_node, key='artifacts') |
| raise _yaml.LoadError(_yaml.LoadErrorReason.INVALID_DATA, |
| "%s: 'artifacts' must be a single 'url:' mapping, or a list of mappings" % |
| (str(provenance))) |
| return cache_specs |
| |
| |
| # configured_remote_artifact_cache_specs(): |
| # |
| # Return the list of configured artifact remotes for a given project, in priority |
| # order. This takes into account the user and project configuration. |
| # |
| # Args: |
| # context (Context): The BuildStream context |
| # project (Project): The BuildStream project |
| # |
| # Returns: |
| # A list of ArtifactCacheSpec instances describing the remote artifact caches. |
| # |
| def configured_remote_artifact_cache_specs(context, project): |
| project_overrides = context._get_overrides(project.name) |
| project_extra_specs = artifact_cache_specs_from_config_node(project_overrides) |
| |
| return list(utils._deduplicate( |
| project_extra_specs + project.artifact_cache_specs + context.artifact_cache_specs)) |
| |
| |
| # An ArtifactCache manages artifacts. |
| # |
| # Args: |
| # context (Context): The BuildStream context |
| # |
| class ArtifactCache(): |
| def __init__(self, context): |
| |
| self.context = context |
| |
| os.makedirs(context.artifactdir, exist_ok=True) |
| self.extractdir = os.path.join(context.artifactdir, 'extract') |
| |
| self._local = False |
| self.global_remote_specs = [] |
| self.project_remote_specs = {} |
| |
| # set_remotes(): |
| # |
| # Set the list of remote caches. If project is None, the global list of |
| # remote caches will be set, which is used by all projects. If a project is |
| # specified, the per-project list of remote caches will be set. |
| # |
| # Args: |
| # remote_specs (list): List of ArtifactCacheSpec instances, in priority order. |
| # project (Project): The Project instance for project-specific remotes |
| def set_remotes(self, remote_specs, *, project=None): |
| if project is None: |
| # global remotes |
| self.global_remote_specs = remote_specs |
| else: |
| self.project_remote_specs[project] = remote_specs |
| |
| # initialize_remotes(): |
| # |
| # This will contact each remote cache. |
| # |
| # Args: |
| # on_failure (callable): Called if we fail to contact one of the caches. |
| # |
| def initialize_remotes(self, *, on_failure=None): |
| pass |
| |
| # contains(): |
| # |
| # Check whether the artifact for the specified Element is already available |
| # in the local artifact cache. |
| # |
| # Args: |
| # element (Element): The Element to check |
| # key (str): The cache key to use |
| # |
| # Returns: True if the artifact is in the cache, False otherwise |
| # |
| def contains(self, element, key): |
| raise ImplError("Cache '{kind}' does not implement contains()" |
| .format(kind=type(self).__name__)) |
| |
| # extract(): |
| # |
| # Extract cached artifact for the specified Element if it hasn't |
| # already been extracted. |
| # |
| # Assumes artifact has previously been fetched or committed. |
| # |
| # Args: |
| # element (Element): The Element to extract |
| # key (str): The cache key to use |
| # |
| # Raises: |
| # ArtifactError: In cases there was an OSError, or if the artifact |
| # did not exist. |
| # |
| # Returns: path to extracted artifact |
| # |
| def extract(self, element, key): |
| raise ImplError("Cache '{kind}' does not implement extract()" |
| .format(kind=type(self).__name__)) |
| |
| # commit(): |
| # |
| # Commit built artifact to cache. |
| # |
| # Args: |
| # element (Element): The Element commit an artifact for |
| # content (str): The element's content directory |
| # keys (list): The cache keys to use |
| # |
| def commit(self, element, content, keys): |
| raise ImplError("Cache '{kind}' does not implement commit()" |
| .format(kind=type(self).__name__)) |
| |
| # has_fetch_remotes(): |
| # |
| # Check whether any remote repositories are available for fetching. |
| # |
| # Returns: True if any remote repositories are configured, False otherwise |
| # |
| def has_fetch_remotes(self): |
| return False |
| |
| # has_push_remotes(): |
| # |
| # Check whether any remote repositories are available for pushing. |
| # |
| # Args: |
| # element (Element): The Element to check |
| # |
| # Returns: True if any remote repository is configured, False otherwise |
| # |
| def has_push_remotes(self, *, element=None): |
| return False |
| |
| # remote_contains(): |
| # |
| # Check whether the artifact for the specified Element is already available |
| # in any remote artifact cache. |
| # |
| # Args: |
| # element (Element): The Element to check |
| # key (str): The cache key to use |
| # |
| # Returns: True if the artifact is in a cache, False otherwise |
| # |
| def remote_contains(self, element, key): |
| return False |
| |
| # push_needed(): |
| # |
| # Check whether an artifact for the specified Element needs to be pushed to |
| # any of the configured push remotes. The policy is to push every artifact |
| # we build to every configured push remote, so this should only return False |
| # if all of the configured push remotes already contain the given artifact. |
| # |
| # This function checks for presence of the artifact only using its strong |
| # key. The presence of the weak key in a cache does not necessarily indicate |
| # that this particular artifact is present, only that there is a |
| # partially-compatible version available. |
| # |
| # Args: |
| # element (Element): The Element to check |
| # key (str): The cache key to use |
| # |
| # Returns: False if all the push remotes have the artifact, True otherwise |
| # |
| def push_needed(self, element, key): |
| return False |
| |
| # push(): |
| # |
| # Push committed artifact to remote repository. |
| # |
| # Args: |
| # element (Element): The Element whose artifact is to be pushed |
| # keys (list): The cache keys to use |
| # |
| # Returns: |
| # (bool): True if any remote was updated, False if no pushes were required |
| # |
| # Raises: |
| # (ArtifactError): if there was an error |
| # |
| def push(self, element, keys): |
| raise ImplError("Cache '{kind}' does not implement push()" |
| .format(kind=type(self).__name__)) |
| |
| # pull(): |
| # |
| # Pull artifact from one of the configured remote repositories. |
| # |
| # Args: |
| # element (Element): The Element whose artifact is to be fetched |
| # key (str): The cache key to use |
| # progress (callable): The progress callback, if any |
| # |
| def pull(self, element, key, *, progress=None): |
| raise ImplError("Cache '{kind}' does not implement pull()" |
| .format(kind=type(self).__name__)) |
| |
| # link_key(): |
| # |
| # Add a key for an existing artifact. |
| # |
| # Args: |
| # element (Element): The Element whose artifact is to be linked |
| # oldkey (str): An existing cache key for the artifact |
| # newkey (str): A new cache key for the artifact |
| # |
| def link_key(self, element, oldkey, newkey): |
| raise ImplError("Cache '{kind}' does not implement link_key()" |
| .format(kind=type(self).__name__)) |