404 lines
13 KiB
Python
404 lines
13 KiB
Python
"""Configuration management setup
|
|
|
|
Some terminology:
|
|
- name
|
|
As written in config files.
|
|
- value
|
|
Value associated with a name
|
|
- key
|
|
Name combined with it's section (section.name)
|
|
- variant
|
|
A single word describing where the configuration key-value pair came from
|
|
"""
|
|
|
|
import configparser
|
|
import locale
|
|
import logging
|
|
import os
|
|
import sys
|
|
from typing import Any, Dict, Iterable, List, NewType, Optional, Tuple
|
|
|
|
from pip._internal.exceptions import (
|
|
ConfigurationError,
|
|
ConfigurationFileCouldNotBeLoaded,
|
|
)
|
|
from pip._internal.utils import appdirs
|
|
from pip._internal.utils.compat import WINDOWS
|
|
from pip._internal.utils.misc import ensure_dir, enum
|
|
|
|
RawConfigParser = configparser.RawConfigParser # Shorthand
|
|
Kind = NewType("Kind", str)
|
|
|
|
CONFIG_BASENAME = 'pip.ini' if WINDOWS else 'pip.conf'
|
|
ENV_NAMES_IGNORED = "version", "help"
|
|
|
|
# The kinds of configurations there are.
|
|
kinds = enum(
|
|
USER="user", # User Specific
|
|
GLOBAL="global", # System Wide
|
|
SITE="site", # [Virtual] Environment Specific
|
|
ENV="env", # from PIP_CONFIG_FILE
|
|
ENV_VAR="env-var", # from Environment Variables
|
|
)
|
|
OVERRIDE_ORDER = kinds.GLOBAL, kinds.USER, kinds.SITE, kinds.ENV, kinds.ENV_VAR
|
|
VALID_LOAD_ONLY = kinds.USER, kinds.GLOBAL, kinds.SITE
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
# NOTE: Maybe use the optionx attribute to normalize keynames.
|
|
def _normalize_name(name):
|
|
# type: (str) -> str
|
|
"""Make a name consistent regardless of source (environment or file)
|
|
"""
|
|
name = name.lower().replace('_', '-')
|
|
if name.startswith('--'):
|
|
name = name[2:] # only prefer long opts
|
|
return name
|
|
|
|
|
|
def _disassemble_key(name):
|
|
# type: (str) -> List[str]
|
|
if "." not in name:
|
|
error_message = (
|
|
"Key does not contain dot separated section and key. "
|
|
"Perhaps you wanted to use 'global.{}' instead?"
|
|
).format(name)
|
|
raise ConfigurationError(error_message)
|
|
return name.split(".", 1)
|
|
|
|
|
|
def get_configuration_files():
|
|
# type: () -> Dict[Kind, List[str]]
|
|
global_config_files = [
|
|
os.path.join(path, CONFIG_BASENAME)
|
|
for path in appdirs.site_config_dirs('pip')
|
|
]
|
|
|
|
site_config_file = os.path.join(sys.prefix, CONFIG_BASENAME)
|
|
legacy_config_file = os.path.join(
|
|
os.path.expanduser('~'),
|
|
'pip' if WINDOWS else '.pip',
|
|
CONFIG_BASENAME,
|
|
)
|
|
new_config_file = os.path.join(
|
|
appdirs.user_config_dir("pip"), CONFIG_BASENAME
|
|
)
|
|
return {
|
|
kinds.GLOBAL: global_config_files,
|
|
kinds.SITE: [site_config_file],
|
|
kinds.USER: [legacy_config_file, new_config_file],
|
|
}
|
|
|
|
|
|
class Configuration:
|
|
"""Handles management of configuration.
|
|
|
|
Provides an interface to accessing and managing configuration files.
|
|
|
|
This class converts provides an API that takes "section.key-name" style
|
|
keys and stores the value associated with it as "key-name" under the
|
|
section "section".
|
|
|
|
This allows for a clean interface wherein the both the section and the
|
|
key-name are preserved in an easy to manage form in the configuration files
|
|
and the data stored is also nice.
|
|
"""
|
|
|
|
def __init__(self, isolated, load_only=None):
|
|
# type: (bool, Optional[Kind]) -> None
|
|
super().__init__()
|
|
|
|
if load_only is not None and load_only not in VALID_LOAD_ONLY:
|
|
raise ConfigurationError(
|
|
"Got invalid value for load_only - should be one of {}".format(
|
|
", ".join(map(repr, VALID_LOAD_ONLY))
|
|
)
|
|
)
|
|
self.isolated = isolated
|
|
self.load_only = load_only
|
|
|
|
# Because we keep track of where we got the data from
|
|
self._parsers = {
|
|
variant: [] for variant in OVERRIDE_ORDER
|
|
} # type: Dict[Kind, List[Tuple[str, RawConfigParser]]]
|
|
self._config = {
|
|
variant: {} for variant in OVERRIDE_ORDER
|
|
} # type: Dict[Kind, Dict[str, Any]]
|
|
self._modified_parsers = [] # type: List[Tuple[str, RawConfigParser]]
|
|
|
|
def load(self):
|
|
# type: () -> None
|
|
"""Loads configuration from configuration files and environment
|
|
"""
|
|
self._load_config_files()
|
|
if not self.isolated:
|
|
self._load_environment_vars()
|
|
|
|
def get_file_to_edit(self):
|
|
# type: () -> Optional[str]
|
|
"""Returns the file with highest priority in configuration
|
|
"""
|
|
assert self.load_only is not None, \
|
|
"Need to be specified a file to be editing"
|
|
|
|
try:
|
|
return self._get_parser_to_modify()[0]
|
|
except IndexError:
|
|
return None
|
|
|
|
def items(self):
|
|
# type: () -> Iterable[Tuple[str, Any]]
|
|
"""Returns key-value pairs like dict.items() representing the loaded
|
|
configuration
|
|
"""
|
|
return self._dictionary.items()
|
|
|
|
def get_value(self, key):
|
|
# type: (str) -> Any
|
|
"""Get a value from the configuration.
|
|
"""
|
|
try:
|
|
return self._dictionary[key]
|
|
except KeyError:
|
|
raise ConfigurationError(f"No such key - {key}")
|
|
|
|
def set_value(self, key, value):
|
|
# type: (str, Any) -> None
|
|
"""Modify a value in the configuration.
|
|
"""
|
|
self._ensure_have_load_only()
|
|
|
|
assert self.load_only
|
|
fname, parser = self._get_parser_to_modify()
|
|
|
|
if parser is not None:
|
|
section, name = _disassemble_key(key)
|
|
|
|
# Modify the parser and the configuration
|
|
if not parser.has_section(section):
|
|
parser.add_section(section)
|
|
parser.set(section, name, value)
|
|
|
|
self._config[self.load_only][key] = value
|
|
self._mark_as_modified(fname, parser)
|
|
|
|
def unset_value(self, key):
|
|
# type: (str) -> None
|
|
"""Unset a value in the configuration."""
|
|
self._ensure_have_load_only()
|
|
|
|
assert self.load_only
|
|
if key not in self._config[self.load_only]:
|
|
raise ConfigurationError(f"No such key - {key}")
|
|
|
|
fname, parser = self._get_parser_to_modify()
|
|
|
|
if parser is not None:
|
|
section, name = _disassemble_key(key)
|
|
if not (parser.has_section(section)
|
|
and parser.remove_option(section, name)):
|
|
# The option was not removed.
|
|
raise ConfigurationError(
|
|
"Fatal Internal error [id=1]. Please report as a bug."
|
|
)
|
|
|
|
# The section may be empty after the option was removed.
|
|
if not parser.items(section):
|
|
parser.remove_section(section)
|
|
self._mark_as_modified(fname, parser)
|
|
|
|
del self._config[self.load_only][key]
|
|
|
|
def save(self):
|
|
# type: () -> None
|
|
"""Save the current in-memory state.
|
|
"""
|
|
self._ensure_have_load_only()
|
|
|
|
for fname, parser in self._modified_parsers:
|
|
logger.info("Writing to %s", fname)
|
|
|
|
# Ensure directory exists.
|
|
ensure_dir(os.path.dirname(fname))
|
|
|
|
with open(fname, "w") as f:
|
|
parser.write(f)
|
|
|
|
#
|
|
# Private routines
|
|
#
|
|
|
|
def _ensure_have_load_only(self):
|
|
# type: () -> None
|
|
if self.load_only is None:
|
|
raise ConfigurationError("Needed a specific file to be modifying.")
|
|
logger.debug("Will be working with %s variant only", self.load_only)
|
|
|
|
@property
|
|
def _dictionary(self):
|
|
# type: () -> Dict[str, Any]
|
|
"""A dictionary representing the loaded configuration.
|
|
"""
|
|
# NOTE: Dictionaries are not populated if not loaded. So, conditionals
|
|
# are not needed here.
|
|
retval = {}
|
|
|
|
for variant in OVERRIDE_ORDER:
|
|
retval.update(self._config[variant])
|
|
|
|
return retval
|
|
|
|
def _load_config_files(self):
|
|
# type: () -> None
|
|
"""Loads configuration from configuration files
|
|
"""
|
|
config_files = dict(self.iter_config_files())
|
|
if config_files[kinds.ENV][0:1] == [os.devnull]:
|
|
logger.debug(
|
|
"Skipping loading configuration files due to "
|
|
"environment's PIP_CONFIG_FILE being os.devnull"
|
|
)
|
|
return
|
|
|
|
for variant, files in config_files.items():
|
|
for fname in files:
|
|
# If there's specific variant set in `load_only`, load only
|
|
# that variant, not the others.
|
|
if self.load_only is not None and variant != self.load_only:
|
|
logger.debug(
|
|
"Skipping file '%s' (variant: %s)", fname, variant
|
|
)
|
|
continue
|
|
|
|
parser = self._load_file(variant, fname)
|
|
|
|
# Keeping track of the parsers used
|
|
self._parsers[variant].append((fname, parser))
|
|
|
|
def _load_file(self, variant, fname):
|
|
# type: (Kind, str) -> RawConfigParser
|
|
logger.debug("For variant '%s', will try loading '%s'", variant, fname)
|
|
parser = self._construct_parser(fname)
|
|
|
|
for section in parser.sections():
|
|
items = parser.items(section)
|
|
self._config[variant].update(self._normalized_keys(section, items))
|
|
|
|
return parser
|
|
|
|
def _construct_parser(self, fname):
|
|
# type: (str) -> RawConfigParser
|
|
parser = configparser.RawConfigParser()
|
|
# If there is no such file, don't bother reading it but create the
|
|
# parser anyway, to hold the data.
|
|
# Doing this is useful when modifying and saving files, where we don't
|
|
# need to construct a parser.
|
|
if os.path.exists(fname):
|
|
try:
|
|
parser.read(fname)
|
|
except UnicodeDecodeError:
|
|
# See https://github.com/pypa/pip/issues/4963
|
|
raise ConfigurationFileCouldNotBeLoaded(
|
|
reason="contains invalid {} characters".format(
|
|
locale.getpreferredencoding(False)
|
|
),
|
|
fname=fname,
|
|
)
|
|
except configparser.Error as error:
|
|
# See https://github.com/pypa/pip/issues/4893
|
|
raise ConfigurationFileCouldNotBeLoaded(error=error)
|
|
return parser
|
|
|
|
def _load_environment_vars(self):
|
|
# type: () -> None
|
|
"""Loads configuration from environment variables
|
|
"""
|
|
self._config[kinds.ENV_VAR].update(
|
|
self._normalized_keys(":env:", self.get_environ_vars())
|
|
)
|
|
|
|
def _normalized_keys(self, section, items):
|
|
# type: (str, Iterable[Tuple[str, Any]]) -> Dict[str, Any]
|
|
"""Normalizes items to construct a dictionary with normalized keys.
|
|
|
|
This routine is where the names become keys and are made the same
|
|
regardless of source - configuration files or environment.
|
|
"""
|
|
normalized = {}
|
|
for name, val in items:
|
|
key = section + "." + _normalize_name(name)
|
|
normalized[key] = val
|
|
return normalized
|
|
|
|
def get_environ_vars(self):
|
|
# type: () -> Iterable[Tuple[str, str]]
|
|
"""Returns a generator with all environmental vars with prefix PIP_"""
|
|
for key, val in os.environ.items():
|
|
if key.startswith("PIP_"):
|
|
name = key[4:].lower()
|
|
if name not in ENV_NAMES_IGNORED:
|
|
yield name, val
|
|
|
|
# XXX: This is patched in the tests.
|
|
def iter_config_files(self):
|
|
# type: () -> Iterable[Tuple[Kind, List[str]]]
|
|
"""Yields variant and configuration files associated with it.
|
|
|
|
This should be treated like items of a dictionary.
|
|
"""
|
|
# SMELL: Move the conditions out of this function
|
|
|
|
# environment variables have the lowest priority
|
|
config_file = os.environ.get('PIP_CONFIG_FILE', None)
|
|
if config_file is not None:
|
|
yield kinds.ENV, [config_file]
|
|
else:
|
|
yield kinds.ENV, []
|
|
|
|
config_files = get_configuration_files()
|
|
|
|
# at the base we have any global configuration
|
|
yield kinds.GLOBAL, config_files[kinds.GLOBAL]
|
|
|
|
# per-user configuration next
|
|
should_load_user_config = not self.isolated and not (
|
|
config_file and os.path.exists(config_file)
|
|
)
|
|
if should_load_user_config:
|
|
# The legacy config file is overridden by the new config file
|
|
yield kinds.USER, config_files[kinds.USER]
|
|
|
|
# finally virtualenv configuration first trumping others
|
|
yield kinds.SITE, config_files[kinds.SITE]
|
|
|
|
def get_values_in_config(self, variant):
|
|
# type: (Kind) -> Dict[str, Any]
|
|
"""Get values present in a config file"""
|
|
return self._config[variant]
|
|
|
|
def _get_parser_to_modify(self):
|
|
# type: () -> Tuple[str, RawConfigParser]
|
|
# Determine which parser to modify
|
|
assert self.load_only
|
|
parsers = self._parsers[self.load_only]
|
|
if not parsers:
|
|
# This should not happen if everything works correctly.
|
|
raise ConfigurationError(
|
|
"Fatal Internal error [id=2]. Please report as a bug."
|
|
)
|
|
|
|
# Use the highest priority parser.
|
|
return parsers[-1]
|
|
|
|
# XXX: This is patched in the tests.
|
|
def _mark_as_modified(self, fname, parser):
|
|
# type: (str, RawConfigParser) -> None
|
|
file_parser_tuple = (fname, parser)
|
|
if file_parser_tuple not in self._modified_parsers:
|
|
self._modified_parsers.append(file_parser_tuple)
|
|
|
|
def __repr__(self):
|
|
# type: () -> str
|
|
return f"{self.__class__.__name__}({self._dictionary!r})"
|