|
|
# encoding: utf-8
|
|
|
"""
|
|
|
System command aliases.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Fernando Perez
|
|
|
* Brian Granger
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License.
|
|
|
#
|
|
|
# The full license is in the file COPYING.txt, distributed with this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import os
|
|
|
import re
|
|
|
import sys
|
|
|
|
|
|
from IPython.config.configurable import Configurable
|
|
|
from IPython.core.error import UsageError
|
|
|
|
|
|
from IPython.utils.py3compat import string_types
|
|
|
from IPython.utils.traitlets import List, Instance
|
|
|
from IPython.utils.warn import error
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Utilities
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# This is used as the pattern for calls to split_user_input.
|
|
|
shell_line_split = re.compile(r'^(\s*)()(\S+)(.*$)')
|
|
|
|
|
|
def default_aliases():
|
|
|
"""Return list of shell aliases to auto-define.
|
|
|
"""
|
|
|
# Note: the aliases defined here should be safe to use on a kernel
|
|
|
# regardless of what frontend it is attached to. Frontends that use a
|
|
|
# kernel in-process can define additional aliases that will only work in
|
|
|
# their case. For example, things like 'less' or 'clear' that manipulate
|
|
|
# the terminal should NOT be declared here, as they will only work if the
|
|
|
# kernel is running inside a true terminal, and not over the network.
|
|
|
|
|
|
if os.name == 'posix':
|
|
|
default_aliases = [('mkdir', 'mkdir'), ('rmdir', 'rmdir'),
|
|
|
('mv', 'mv'), ('rm', 'rm'), ('cp', 'cp'),
|
|
|
('cat', 'cat'),
|
|
|
]
|
|
|
# Useful set of ls aliases. The GNU and BSD options are a little
|
|
|
# different, so we make aliases that provide as similar as possible
|
|
|
# behavior in ipython, by passing the right flags for each platform
|
|
|
if sys.platform.startswith('linux'):
|
|
|
ls_aliases = [('ls', 'ls -F --color'),
|
|
|
# long ls
|
|
|
('ll', 'ls -F -o --color'),
|
|
|
# ls normal files only
|
|
|
('lf', 'ls -F -o --color %l | grep ^-'),
|
|
|
# ls symbolic links
|
|
|
('lk', 'ls -F -o --color %l | grep ^l'),
|
|
|
# directories or links to directories,
|
|
|
('ldir', 'ls -F -o --color %l | grep /$'),
|
|
|
# things which are executable
|
|
|
('lx', 'ls -F -o --color %l | grep ^-..x'),
|
|
|
]
|
|
|
elif sys.platform.startswith('openbsd') or sys.platform.startswith('netbsd'):
|
|
|
# OpenBSD, NetBSD
|
|
|
ls_aliases = [('ls', 'ls -F'),
|
|
|
# long ls
|
|
|
('ll', 'ls -F -l'),
|
|
|
# ls normal files only
|
|
|
('lf', 'ls -F -l %l | grep ^-'),
|
|
|
# ls symbolic links
|
|
|
('lk', 'ls -F -l %l | grep ^l'),
|
|
|
# directories or links to directories,
|
|
|
('ldir', 'ls -F -l %l | grep /$'),
|
|
|
# things which are executable
|
|
|
('lx', 'ls -F -l %l | grep ^-..x'),
|
|
|
]
|
|
|
else:
|
|
|
# BSD, OSX, etc.
|
|
|
ls_aliases = [('ls', 'ls -F -G'),
|
|
|
# long ls
|
|
|
('ll', 'ls -F -l -G'),
|
|
|
# ls normal files only
|
|
|
('lf', 'ls -F -l -G %l | grep ^-'),
|
|
|
# ls symbolic links
|
|
|
('lk', 'ls -F -l -G %l | grep ^l'),
|
|
|
# directories or links to directories,
|
|
|
('ldir', 'ls -F -G -l %l | grep /$'),
|
|
|
# things which are executable
|
|
|
('lx', 'ls -F -l -G %l | grep ^-..x'),
|
|
|
]
|
|
|
default_aliases = default_aliases + ls_aliases
|
|
|
elif os.name in ['nt', 'dos']:
|
|
|
default_aliases = [('ls', 'dir /on'),
|
|
|
('ddir', 'dir /ad /on'), ('ldir', 'dir /ad /on'),
|
|
|
('mkdir', 'mkdir'), ('rmdir', 'rmdir'),
|
|
|
('echo', 'echo'), ('ren', 'ren'), ('copy', 'copy'),
|
|
|
]
|
|
|
else:
|
|
|
default_aliases = []
|
|
|
|
|
|
return default_aliases
|
|
|
|
|
|
|
|
|
class AliasError(Exception):
|
|
|
pass
|
|
|
|
|
|
|
|
|
class InvalidAliasError(AliasError):
|
|
|
pass
|
|
|
|
|
|
class Alias(object):
|
|
|
"""Callable object storing the details of one alias.
|
|
|
|
|
|
Instances are registered as magic functions to allow use of aliases.
|
|
|
"""
|
|
|
|
|
|
# Prepare blacklist
|
|
|
blacklist = {'cd','popd','pushd','dhist','alias','unalias'}
|
|
|
|
|
|
def __init__(self, shell, name, cmd):
|
|
|
self.shell = shell
|
|
|
self.name = name
|
|
|
self.cmd = cmd
|
|
|
self.nargs = self.validate()
|
|
|
|
|
|
def validate(self):
|
|
|
"""Validate the alias, and return the number of arguments."""
|
|
|
if self.name in self.blacklist:
|
|
|
raise InvalidAliasError("The name %s can't be aliased "
|
|
|
"because it is a keyword or builtin." % self.name)
|
|
|
try:
|
|
|
caller = self.shell.magics_manager.magics['line'][self.name]
|
|
|
except KeyError:
|
|
|
pass
|
|
|
else:
|
|
|
if not isinstance(caller, Alias):
|
|
|
raise InvalidAliasError("The name %s can't be aliased "
|
|
|
"because it is another magic command." % self.name)
|
|
|
|
|
|
if not (isinstance(self.cmd, string_types)):
|
|
|
raise InvalidAliasError("An alias command must be a string, "
|
|
|
"got: %r" % self.cmd)
|
|
|
|
|
|
nargs = self.cmd.count('%s')
|
|
|
|
|
|
if (nargs > 0) and (self.cmd.find('%l') >= 0):
|
|
|
raise InvalidAliasError('The %s and %l specifiers are mutually '
|
|
|
'exclusive in alias definitions.')
|
|
|
|
|
|
return nargs
|
|
|
|
|
|
def __repr__(self):
|
|
|
return "<alias {} for {!r}>".format(self.name, self.cmd)
|
|
|
|
|
|
def __call__(self, rest=''):
|
|
|
cmd = self.cmd
|
|
|
nargs = self.nargs
|
|
|
# Expand the %l special to be the user's input line
|
|
|
if cmd.find('%l') >= 0:
|
|
|
cmd = cmd.replace('%l', rest)
|
|
|
rest = ''
|
|
|
if nargs==0:
|
|
|
# Simple, argument-less aliases
|
|
|
cmd = '%s %s' % (cmd, rest)
|
|
|
else:
|
|
|
# Handle aliases with positional arguments
|
|
|
args = rest.split(None, nargs)
|
|
|
if len(args) < nargs:
|
|
|
raise UsageError('Alias <%s> requires %s arguments, %s given.' %
|
|
|
(self.name, nargs, len(args)))
|
|
|
cmd = '%s %s' % (cmd % tuple(args[:nargs]),' '.join(args[nargs:]))
|
|
|
|
|
|
self.shell.system(cmd)
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Main AliasManager class
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class AliasManager(Configurable):
|
|
|
|
|
|
default_aliases = List(default_aliases(), config=True)
|
|
|
user_aliases = List(default_value=[], config=True)
|
|
|
shell = Instance('IPython.core.interactiveshell.InteractiveShellABC')
|
|
|
|
|
|
def __init__(self, shell=None, **kwargs):
|
|
|
super(AliasManager, self).__init__(shell=shell, **kwargs)
|
|
|
# For convenient access
|
|
|
self.linemagics = self.shell.magics_manager.magics['line']
|
|
|
self.init_aliases()
|
|
|
|
|
|
def init_aliases(self):
|
|
|
# Load default & user aliases
|
|
|
for name, cmd in self.default_aliases + self.user_aliases:
|
|
|
self.soft_define_alias(name, cmd)
|
|
|
|
|
|
@property
|
|
|
def aliases(self):
|
|
|
return [(n, func.cmd) for (n, func) in self.linemagics.items()
|
|
|
if isinstance(func, Alias)]
|
|
|
|
|
|
def soft_define_alias(self, name, cmd):
|
|
|
"""Define an alias, but don't raise on an AliasError."""
|
|
|
try:
|
|
|
self.define_alias(name, cmd)
|
|
|
except AliasError as e:
|
|
|
error("Invalid alias: %s" % e)
|
|
|
|
|
|
def define_alias(self, name, cmd):
|
|
|
"""Define a new alias after validating it.
|
|
|
|
|
|
This will raise an :exc:`AliasError` if there are validation
|
|
|
problems.
|
|
|
"""
|
|
|
caller = Alias(shell=self.shell, name=name, cmd=cmd)
|
|
|
self.shell.magics_manager.register_function(caller, magic_kind='line',
|
|
|
magic_name=name)
|
|
|
|
|
|
def get_alias(self, name):
|
|
|
"""Return an alias, or None if no alias by that name exists."""
|
|
|
aname = self.linemagics.get(name, None)
|
|
|
return aname if isinstance(aname, Alias) else None
|
|
|
|
|
|
def is_alias(self, name):
|
|
|
"""Return whether or not a given name has been defined as an alias"""
|
|
|
return self.get_alias(name) is not None
|
|
|
|
|
|
def undefine_alias(self, name):
|
|
|
if self.is_alias(name):
|
|
|
del self.linemagics[name]
|
|
|
else:
|
|
|
raise ValueError('%s is not an alias' % name)
|
|
|
|
|
|
def clear_aliases(self):
|
|
|
for name, cmd in self.aliases:
|
|
|
self.undefine_alias(name)
|
|
|
|
|
|
def retrieve_alias(self, name):
|
|
|
"""Retrieve the command to which an alias expands."""
|
|
|
caller = self.get_alias(name)
|
|
|
if caller:
|
|
|
return caller.cmd
|
|
|
else:
|
|
|
raise ValueError('%s is not an alias' % name)
|
|
|
|
