Coverage for python/lsst/daf/butler/_butlerConfig.py : 12%

Hot-keys on this page
r m x p toggle line displays
j k next/prev highlighted chunk
0 (zero) top of page
1 (one) first highlighted chunk
1# This file is part of daf_butler.
2#
3# Developed for the LSST Data Management System.
4# This product includes software developed by the LSST Project
5# (http://www.lsst.org).
6# See the COPYRIGHT file at the top-level directory of this distribution
7# for details of code ownership.
8#
9# This program is free software: you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation, either version 3 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17# GNU General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program. If not, see <http://www.gnu.org/licenses/>.
22"""
23Configuration classes specific to the Butler
24"""
26__all__ = ("ButlerConfig",)
28import os.path
30from .core import (
31 ButlerURI,
32 CompositesConfig,
33 Config,
34 DatastoreConfig,
35 DimensionConfig,
36 RepoTransferFormatConfig,
37 StorageClassConfig,
38)
39from .registry import RegistryConfig
41CONFIG_COMPONENT_CLASSES = (RegistryConfig, StorageClassConfig,
42 DatastoreConfig, CompositesConfig, DimensionConfig,
43 RepoTransferFormatConfig)
46class ButlerConfig(Config):
47 """Contains the configuration for a `Butler`
49 The configuration is read and merged with default configurations for
50 the particular classes. The defaults are read according to the rules
51 outlined in `ConfigSubset`. Each component of the configuration associated
52 with a configuration class reads its own defaults.
54 Parameters
55 ----------
56 other : `str`, `Config`, optional
57 Path to butler configuration YAML file or a directory containing a
58 "butler.yaml" file. If `None` the butler will
59 be configured based entirely on defaults read from the environment
60 or from ``searchPaths``.
61 No defaults will be read if a `ButlerConfig` is supplied directly.
62 searchPaths : `list` or `tuple`, optional
63 Explicit additional paths to search for defaults. They should
64 be supplied in priority order. These paths have higher priority
65 than those read from the environment in
66 `ConfigSubset.defaultSearchPaths()`. They are only read if ``other``
67 refers to a configuration file or directory.
68 """
70 def __init__(self, other=None, searchPaths=None):
72 self.configDir = None
74 # If this is already a ButlerConfig we assume that defaults
75 # have already been loaded.
76 if other is not None and isinstance(other, ButlerConfig):
77 super().__init__(other)
78 # Ensure that the configuration directory propagates
79 self.configDir = other.configDir
80 return
82 if isinstance(other, str):
83 uri = ButlerURI(other)
84 if uri.scheme == "file" or not uri.scheme:
85 if os.path.isdir(uri.ospath):
86 other = os.path.join(uri.ospath, "butler.yaml")
87 elif uri.scheme == "s3":
88 if not uri.dirLike and "." not in uri.basename():
89 uri = ButlerURI(other, forceDirectory=True)
90 uri.updateFile("butler.yaml")
91 other = uri.geturl()
92 else:
93 raise ValueError(f"Unrecognized URI scheme: {uri.scheme}")
95 # Create an empty config for us to populate
96 super().__init__()
98 # Read the supplied config so that we can work out which other
99 # defaults to use.
100 butlerConfig = Config(other)
102 configFile = butlerConfig.configFile
103 if configFile is not None:
104 uri = ButlerURI(configFile)
105 if uri.scheme == "s3":
106 uri.updateFile("")
107 self.configDir = uri.geturl()
108 else:
109 self.configDir = os.path.dirname(os.path.abspath(configFile))
111 # A Butler config contains defaults defined by each of the component
112 # configuration classes. We ask each of them to apply defaults to
113 # the values we have been supplied by the user.
114 for configClass in CONFIG_COMPONENT_CLASSES:
115 # Only send the parent config if the child
116 # config component is present (otherwise it assumes that the
117 # keys from other components are part of the child)
118 localOverrides = None
119 if configClass.component in butlerConfig:
120 localOverrides = butlerConfig
121 config = configClass(localOverrides, searchPaths=searchPaths)
122 # Re-attach it using the global namespace
123 self.update({configClass.component: config})
124 # Remove the key from the butlerConfig since we have already
125 # merged that information.
126 if configClass.component in butlerConfig:
127 del butlerConfig[configClass.component]
129 # Now that we have all the defaults we can merge the externally
130 # provided config into the defaults.
131 # Not needed if there is never information in a butler config file
132 # not present in component configurations
133 self.update(butlerConfig)