| # |
| # Copyright (C) 2016-2018 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 Van Berkom <tristan.vanberkom@codethink.co.uk> |
| |
| import os |
| import datetime |
| from collections import deque, Mapping |
| from contextlib import contextmanager |
| from . import _cachekey |
| from . import _signals |
| from . import _site |
| from . import _yaml |
| from ._exceptions import LoadError, LoadErrorReason, BstError |
| from ._message import Message, MessageType |
| from ._profile import Topics, profile_start, profile_end |
| from ._artifactcache import ArtifactCache |
| from ._workspaces import Workspaces |
| |
| |
| # Context() |
| # |
| # The Context object holds all of the user preferences |
| # and context for a given invocation of BuildStream. |
| # |
| # This is a collection of data from configuration files and command |
| # line arguments and consists of information such as where to store |
| # logs and artifacts, where to perform builds and cache downloaded sources, |
| # verbosity levels and basically anything pertaining to the context |
| # in which BuildStream was invoked. |
| # |
| class Context(): |
| |
| def __init__(self): |
| |
| # Filename indicating which configuration file was used, or None for the defaults |
| self.config_origin = None |
| |
| # The directory where various sources are stored |
| self.sourcedir = None |
| |
| # The directory where build sandboxes will be created |
| self.builddir = None |
| |
| # The local binary artifact cache directory |
| self.artifactdir = None |
| |
| # The locations from which to push and pull prebuilt artifacts |
| self.artifact_cache_specs = [] |
| |
| # The directory to store build logs |
| self.logdir = None |
| |
| # The abbreviated cache key length to display in the UI |
| self.log_key_length = 0 |
| |
| # Whether debug mode is enabled |
| self.log_debug = False |
| |
| # Whether verbose mode is enabled |
| self.log_verbose = False |
| |
| # Maximum number of lines to print from build logs |
| self.log_error_lines = 0 |
| |
| # Maximum number of lines to print in the master log for a detailed message |
| self.log_message_lines = 0 |
| |
| # Format string for printing the pipeline at startup time |
| self.log_element_format = None |
| |
| # Format string for printing message lines in the master log |
| self.log_message_format = None |
| |
| # Maximum number of fetch or refresh tasks |
| self.sched_fetchers = 4 |
| |
| # Maximum number of build tasks |
| self.sched_builders = 4 |
| |
| # Maximum number of push tasks |
| self.sched_pushers = 4 |
| |
| # Maximum number of retries for network tasks |
| self.sched_network_retries = 2 |
| |
| # What to do when a build fails in non interactive mode |
| self.sched_error_action = 'continue' |
| |
| # Whether elements must be rebuilt when their dependencies have changed |
| self._strict_build_plan = None |
| |
| # Make sure the XDG vars are set in the environment before loading anything |
| self._init_xdg() |
| |
| # Private variables |
| self._cache_key = None |
| self._message_handler = None |
| self._message_depth = deque() |
| self._projects = [] |
| self._project_overrides = {} |
| self._workspaces = None |
| |
| # load() |
| # |
| # Loads the configuration files |
| # |
| # Args: |
| # config (filename): The user specified configuration file, if any |
| # |
| # Raises: |
| # LoadError |
| # |
| # This will first load the BuildStream default configuration and then |
| # override that configuration with the configuration file indicated |
| # by *config*, if any was specified. |
| # |
| def load(self, config=None): |
| profile_start(Topics.LOAD_CONTEXT, 'load') |
| |
| # If a specific config file is not specified, default to trying |
| # a $XDG_CONFIG_HOME/buildstream.conf file |
| # |
| if not config: |
| default_config = os.path.join(os.environ['XDG_CONFIG_HOME'], |
| 'buildstream.conf') |
| if os.path.exists(default_config): |
| config = default_config |
| |
| # Load default config |
| # |
| defaults = _yaml.load(_site.default_user_config) |
| |
| if config: |
| self.config_origin = os.path.abspath(config) |
| user_config = _yaml.load(config) |
| _yaml.composite(defaults, user_config) |
| |
| _yaml.node_validate(defaults, [ |
| 'sourcedir', 'builddir', 'artifactdir', 'logdir', |
| 'scheduler', 'artifacts', 'logging', 'projects', |
| ]) |
| |
| for directory in ['sourcedir', 'builddir', 'artifactdir', 'logdir']: |
| # Allow the ~ tilde expansion and any environment variables in |
| # path specification in the config files. |
| # |
| path = _yaml.node_get(defaults, str, directory) |
| path = os.path.expanduser(path) |
| path = os.path.expandvars(path) |
| path = os.path.normpath(path) |
| setattr(self, directory, path) |
| |
| # Load artifact share configuration |
| self.artifact_cache_specs = ArtifactCache.specs_from_config_node(defaults) |
| |
| # Load logging config |
| logging = _yaml.node_get(defaults, Mapping, 'logging') |
| _yaml.node_validate(logging, [ |
| 'key-length', 'verbose', |
| 'error-lines', 'message-lines', |
| 'debug', 'element-format', 'message-format' |
| ]) |
| self.log_key_length = _yaml.node_get(logging, int, 'key-length') |
| self.log_debug = _yaml.node_get(logging, bool, 'debug') |
| self.log_verbose = _yaml.node_get(logging, bool, 'verbose') |
| self.log_error_lines = _yaml.node_get(logging, int, 'error-lines') |
| self.log_message_lines = _yaml.node_get(logging, int, 'message-lines') |
| self.log_element_format = _yaml.node_get(logging, str, 'element-format') |
| self.log_message_format = _yaml.node_get(logging, str, 'message-format') |
| |
| # Load scheduler config |
| scheduler = _yaml.node_get(defaults, Mapping, 'scheduler') |
| _yaml.node_validate(scheduler, [ |
| 'on-error', 'fetchers', 'builders', |
| 'pushers', 'network-retries' |
| ]) |
| self.sched_error_action = _yaml.node_get(scheduler, str, 'on-error') |
| self.sched_fetchers = _yaml.node_get(scheduler, int, 'fetchers') |
| self.sched_builders = _yaml.node_get(scheduler, int, 'builders') |
| self.sched_pushers = _yaml.node_get(scheduler, int, 'pushers') |
| self.sched_network_retries = _yaml.node_get(scheduler, int, 'network-retries') |
| |
| # Load per-projects overrides |
| self._project_overrides = _yaml.node_get(defaults, Mapping, 'projects', default_value={}) |
| |
| # Shallow validation of overrides, parts of buildstream which rely |
| # on the overrides are expected to validate elsewhere. |
| for _, overrides in _yaml.node_items(self._project_overrides): |
| _yaml.node_validate(overrides, ['artifacts', 'options', 'strict']) |
| |
| profile_end(Topics.LOAD_CONTEXT, 'load') |
| |
| valid_actions = ['continue', 'quit'] |
| if self.sched_error_action not in valid_actions: |
| provenance = _yaml.node_get_provenance(scheduler, 'on-error') |
| raise LoadError(LoadErrorReason.INVALID_DATA, |
| "{}: on-error should be one of: {}".format( |
| provenance, ", ".join(valid_actions))) |
| |
| # add_project(): |
| # |
| # Add a project to the context. |
| # |
| # Args: |
| # project (Project): The project to add |
| # |
| def add_project(self, project): |
| if not self._projects: |
| self._workspaces = Workspaces(project) |
| self._projects.append(project) |
| |
| # get_projects(): |
| # |
| # Return the list of projects in the context. |
| # |
| # Returns: |
| # (list): The list of projects |
| # |
| def get_projects(self): |
| return self._projects |
| |
| # get_toplevel_project(): |
| # |
| # Return the toplevel project, the one which BuildStream was |
| # invoked with as opposed to a junctioned subproject. |
| # |
| # Returns: |
| # (list): The list of projects |
| # |
| def get_toplevel_project(self): |
| return self._projects[0] |
| |
| def get_workspaces(self): |
| return self._workspaces |
| |
| # get_overrides(): |
| # |
| # Fetch the override dictionary for the active project. This returns |
| # a node loaded from YAML and as such, values loaded from the returned |
| # node should be loaded using the _yaml.node_get() family of functions. |
| # |
| # Args: |
| # project_name (str): The project name |
| # |
| # Returns: |
| # (Mapping): The overrides dictionary for the specified project |
| # |
| def get_overrides(self, project_name): |
| return _yaml.node_get(self._project_overrides, Mapping, project_name, default_value={}) |
| |
| # get_strict(): |
| # |
| # Fetch whether we are strict or not |
| # |
| # Returns: |
| # (bool): Whether or not to use strict build plan |
| # |
| def get_strict(self): |
| |
| # If it was set by the CLI, it overrides any config |
| if self._strict_build_plan is not None: |
| return self._strict_build_plan |
| |
| toplevel = self.get_toplevel_project() |
| overrides = self.get_overrides(toplevel.name) |
| return _yaml.node_get(overrides, bool, 'strict', default_value=True) |
| |
| # get_cache_key(): |
| # |
| # Returns the cache key, calculating it if necessary |
| # |
| # Returns: |
| # (str): A hex digest cache key for the Context |
| # |
| def get_cache_key(self): |
| if self._cache_key is None: |
| |
| # Anything that alters the build goes into the unique key |
| self._cache_key = _cachekey.generate_key({}) |
| |
| return self._cache_key |
| |
| # set_message_handler() |
| # |
| # Sets the handler for any status messages propagated through |
| # the context. |
| # |
| # The message handler should have the same signature as |
| # the message() method |
| def set_message_handler(self, handler): |
| self._message_handler = handler |
| |
| # silent_messages(): |
| # |
| # Returns: |
| # (bool): Whether messages are currently being silenced |
| # |
| def silent_messages(self): |
| for silent in self._message_depth: |
| if silent: |
| return True |
| return False |
| |
| # message(): |
| # |
| # Proxies a message back to the caller, this is the central |
| # point through which all messages pass. |
| # |
| # Args: |
| # message: A Message object |
| # |
| def message(self, message): |
| |
| # Tag message only once |
| if message.depth is None: |
| message.depth = len(list(self._message_depth)) |
| |
| # Send it off to the log handler (can be the frontend, |
| # or it can be the child task which will log and propagate |
| # to the frontend) |
| assert self._message_handler |
| |
| self._message_handler(message, context=self) |
| return |
| |
| # silence() |
| # |
| # A context manager to silence messages, this behaves in |
| # the same way as the `silent_nested` argument of the |
| # Context._timed_activity() context manager: especially |
| # important messages will not be silenced. |
| # |
| @contextmanager |
| def silence(self): |
| self._push_message_depth(True) |
| try: |
| yield |
| finally: |
| self._pop_message_depth() |
| |
| # timed_activity() |
| # |
| # Context manager for performing timed activities and logging those |
| # |
| # Args: |
| # context (Context): The invocation context object |
| # activity_name (str): The name of the activity |
| # detail (str): An optional detailed message, can be multiline output |
| # silent_nested (bool): If specified, nested messages will be silenced |
| # |
| @contextmanager |
| def timed_activity(self, activity_name, *, unique_id=None, detail=None, silent_nested=False): |
| |
| starttime = datetime.datetime.now() |
| stopped_time = None |
| |
| def stop_time(): |
| nonlocal stopped_time |
| stopped_time = datetime.datetime.now() |
| |
| def resume_time(): |
| nonlocal stopped_time |
| nonlocal starttime |
| sleep_time = datetime.datetime.now() - stopped_time |
| starttime += sleep_time |
| |
| with _signals.suspendable(stop_time, resume_time): |
| try: |
| # Push activity depth for status messages |
| message = Message(unique_id, MessageType.START, activity_name, detail=detail) |
| self.message(message) |
| self._push_message_depth(silent_nested) |
| yield |
| |
| except BstError: |
| # Note the failure in status messages and reraise, the scheduler |
| # expects an error when there is an error. |
| elapsed = datetime.datetime.now() - starttime |
| message = Message(unique_id, MessageType.FAIL, activity_name, elapsed=elapsed) |
| self._pop_message_depth() |
| self.message(message) |
| raise |
| |
| elapsed = datetime.datetime.now() - starttime |
| message = Message(unique_id, MessageType.SUCCESS, activity_name, elapsed=elapsed) |
| self._pop_message_depth() |
| self.message(message) |
| |
| # _push_message_depth() / _pop_message_depth() |
| # |
| # For status messages, send the depth of timed |
| # activities inside a given task through the message |
| # |
| def _push_message_depth(self, silent_nested): |
| self._message_depth.appendleft(silent_nested) |
| |
| def _pop_message_depth(self): |
| assert self._message_depth |
| self._message_depth.popleft() |
| |
| # Force the resolved XDG variables into the environment, |
| # this is so that they can be used directly to specify |
| # preferred locations of things from user configuration |
| # files. |
| def _init_xdg(self): |
| if not os.environ.get('XDG_CACHE_HOME'): |
| os.environ['XDG_CACHE_HOME'] = os.path.expanduser('~/.cache') |
| if not os.environ.get('XDG_CONFIG_HOME'): |
| os.environ['XDG_CONFIG_HOME'] = os.path.expanduser('~/.config') |
| if not os.environ.get('XDG_DATA_HOME'): |
| os.environ['XDG_DATA_HOME'] = os.path.expanduser('~/.local/share') |
