228 lines
6.9 KiB
Python
228 lines
6.9 KiB
Python
import logging
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import os
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import subprocess
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from pip._internal.basecommand import Command
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from pip._internal.configuration import Configuration, kinds
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from pip._internal.exceptions import PipError
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from pip._internal.locations import venv_config_file
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from pip._internal.status_codes import ERROR, SUCCESS
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from pip._internal.utils.misc import get_prog
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logger = logging.getLogger(__name__)
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class ConfigurationCommand(Command):
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"""Manage local and global configuration.
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Subcommands:
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list: List the active configuration (or from the file specified)
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edit: Edit the configuration file in an editor
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get: Get the value associated with name
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set: Set the name=value
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unset: Unset the value associated with name
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If none of --user, --global and --venv are passed, a virtual
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environment configuration file is used if one is active and the file
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exists. Otherwise, all modifications happen on the to the user file by
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default.
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"""
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name = 'config'
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usage = """
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%prog [<file-option>] list
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%prog [<file-option>] [--editor <editor-path>] edit
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%prog [<file-option>] get name
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%prog [<file-option>] set name value
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%prog [<file-option>] unset name
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"""
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summary = "Manage local and global configuration."
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def __init__(self, *args, **kwargs):
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super(ConfigurationCommand, self).__init__(*args, **kwargs)
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self.configuration = None
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self.cmd_opts.add_option(
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'--editor',
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dest='editor',
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action='store',
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default=None,
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help=(
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'Editor to use to edit the file. Uses VISUAL or EDITOR '
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'environment variables if not provided.'
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)
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)
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self.cmd_opts.add_option(
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'--global',
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dest='global_file',
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action='store_true',
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default=False,
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help='Use the system-wide configuration file only'
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)
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self.cmd_opts.add_option(
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'--user',
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dest='user_file',
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action='store_true',
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default=False,
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help='Use the user configuration file only'
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)
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self.cmd_opts.add_option(
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'--venv',
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dest='venv_file',
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action='store_true',
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default=False,
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help='Use the virtualenv configuration file only'
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)
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self.parser.insert_option_group(0, self.cmd_opts)
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def run(self, options, args):
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handlers = {
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"list": self.list_values,
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"edit": self.open_in_editor,
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"get": self.get_name,
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"set": self.set_name_value,
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"unset": self.unset_name
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}
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# Determine action
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if not args or args[0] not in handlers:
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logger.error("Need an action ({}) to perform.".format(
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", ".join(sorted(handlers)))
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)
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return ERROR
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action = args[0]
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# Determine which configuration files are to be loaded
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# Depends on whether the command is modifying.
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try:
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load_only = self._determine_file(
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options, need_value=(action in ["get", "set", "unset", "edit"])
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)
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except PipError as e:
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logger.error(e.args[0])
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return ERROR
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# Load a new configuration
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self.configuration = Configuration(
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isolated=options.isolated_mode, load_only=load_only
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)
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self.configuration.load()
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# Error handling happens here, not in the action-handlers.
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try:
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handlers[action](options, args[1:])
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except PipError as e:
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logger.error(e.args[0])
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return ERROR
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return SUCCESS
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def _determine_file(self, options, need_value):
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file_options = {
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kinds.USER: options.user_file,
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kinds.GLOBAL: options.global_file,
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kinds.VENV: options.venv_file
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}
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if sum(file_options.values()) == 0:
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if not need_value:
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return None
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# Default to user, unless there's a virtualenv file.
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elif os.path.exists(venv_config_file):
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return kinds.VENV
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else:
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return kinds.USER
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elif sum(file_options.values()) == 1:
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# There's probably a better expression for this.
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return [key for key in file_options if file_options[key]][0]
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raise PipError(
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"Need exactly one file to operate upon "
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"(--user, --venv, --global) to perform."
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)
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def list_values(self, options, args):
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self._get_n_args(args, "list", n=0)
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for key, value in sorted(self.configuration.items()):
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logger.info("%s=%r", key, value)
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def get_name(self, options, args):
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key = self._get_n_args(args, "get [name]", n=1)
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value = self.configuration.get_value(key)
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logger.info("%s", value)
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def set_name_value(self, options, args):
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key, value = self._get_n_args(args, "set [name] [value]", n=2)
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self.configuration.set_value(key, value)
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self._save_configuration()
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def unset_name(self, options, args):
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key = self._get_n_args(args, "unset [name]", n=1)
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self.configuration.unset_value(key)
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self._save_configuration()
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def open_in_editor(self, options, args):
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editor = self._determine_editor(options)
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fname = self.configuration.get_file_to_edit()
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if fname is None:
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raise PipError("Could not determine appropriate file.")
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try:
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subprocess.check_call([editor, fname])
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except subprocess.CalledProcessError as e:
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raise PipError(
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"Editor Subprocess exited with exit code {}"
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.format(e.returncode)
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)
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def _get_n_args(self, args, example, n):
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"""Helper to make sure the command got the right number of arguments
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"""
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if len(args) != n:
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msg = (
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'Got unexpected number of arguments, expected {}. '
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'(example: "{} config {}")'
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).format(n, get_prog(), example)
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raise PipError(msg)
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if n == 1:
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return args[0]
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else:
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return args
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def _save_configuration(self):
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# We successfully ran a modifying command. Need to save the
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# configuration.
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try:
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self.configuration.save()
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except Exception:
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logger.error(
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"Unable to save configuration. Please report this as a bug.",
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exc_info=1
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)
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raise PipError("Internal Error.")
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def _determine_editor(self, options):
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if options.editor is not None:
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return options.editor
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elif "VISUAL" in os.environ:
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return os.environ["VISUAL"]
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elif "EDITOR" in os.environ:
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return os.environ["EDITOR"]
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else:
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raise PipError("Could not determine editor to use.")
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