|
|
# encoding: utf-8
|
|
|
"""
|
|
|
System command aliases.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Fernando Perez
|
|
|
* Brian Granger
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2010 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 __builtin__
|
|
|
import keyword
|
|
|
import os
|
|
|
import re
|
|
|
import sys
|
|
|
|
|
|
from IPython.config.configurable import Configurable
|
|
|
from IPython.core.splitinput import split_user_input
|
|
|
|
|
|
from IPython.utils.traitlets import List, Instance
|
|
|
from IPython.utils.autoattr import auto_attr
|
|
|
from IPython.utils.warn import warn, error
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Utilities
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# This is used as the pattern for calls to split_user_input.
|
|
|
shell_line_split = re.compile(r'^(\s*)()(\S+)(.*$)')
|
|
|
|
|
|
def default_aliases():
|
|
|
"""Return list of shell aliases to auto-define.
|
|
|
"""
|
|
|
# Note: the aliases defined here should be safe to use on a kernel
|
|
|
# regardless of what frontend it is attached to. Frontends that use a
|
|
|
# kernel in-process can define additional aliases that will only work in
|
|
|
# their case. For example, things like 'less' or 'clear' that manipulate
|
|
|
# the terminal should NOT be declared here, as they will only work if the
|
|
|
# kernel is running inside a true terminal, and not over the network.
|
|
|
|
|
|
if os.name == 'posix':
|
|
|
default_aliases = [('mkdir', 'mkdir'), ('rmdir', 'rmdir'),
|
|
|
('mv', 'mv -i'), ('rm', 'rm -i'), ('cp', 'cp -i'),
|
|
|
('cat', 'cat'),
|
|
|
]
|
|
|
# Useful set of ls aliases. The GNU and BSD options are a little
|
|
|
# different, so we make aliases that provide as similar as possible
|
|
|
# behavior in ipython, by passing the right flags for each platform
|
|
|
if sys.platform.startswith('linux'):
|
|
|
ls_aliases = [('ls', 'ls -F --color'),
|
|
|
# long ls
|
|
|
('ll', 'ls -F -o --color'),
|
|
|
# ls normal files only
|
|
|
('lf', 'ls -F -o --color %l | grep ^-'),
|
|
|
# ls symbolic links
|
|
|
('lk', 'ls -F -o --color %l | grep ^l'),
|
|
|
# directories or links to directories,
|
|
|
('ldir', 'ls -F -o --color %l | grep /$'),
|
|
|
# things which are executable
|
|
|
('lx', 'ls -F -o --color %l | grep ^-..x'),
|
|
|
]
|
|
|
else:
|
|
|
# BSD, OSX, etc.
|
|
|
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'),
|
|
|
]
|
|
|
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
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# 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, config=None):
|
|
|
super(AliasManager, self).__init__(shell=shell, config=config)
|
|
|
self.alias_table = {}
|
|
|
self.exclude_aliases()
|
|
|
self.init_aliases()
|
|
|
|
|
|
def __contains__(self, name):
|
|
|
return name in self.alias_table
|
|
|
|
|
|
@property
|
|
|
def aliases(self):
|
|
|
return [(item[0], item[1][1]) for item in self.alias_table.iteritems()]
|
|
|
|
|
|
def exclude_aliases(self):
|
|
|
# set of things NOT to alias (keywords, builtins and some magics)
|
|
|
no_alias = set(['cd','popd','pushd','dhist','alias','unalias'])
|
|
|
no_alias.update(set(keyword.kwlist))
|
|
|
no_alias.update(set(__builtin__.__dict__.keys()))
|
|
|
self.no_alias = no_alias
|
|
|
|
|
|
def init_aliases(self):
|
|
|
# Load default aliases
|
|
|
for name, cmd in self.default_aliases:
|
|
|
self.soft_define_alias(name, cmd)
|
|
|
|
|
|
# Load user aliases
|
|
|
for name, cmd in self.user_aliases:
|
|
|
self.soft_define_alias(name, cmd)
|
|
|
|
|
|
def clear_aliases(self):
|
|
|
self.alias_table.clear()
|
|
|
|
|
|
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, 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.
|
|
|
"""
|
|
|
nargs = self.validate_alias(name, cmd)
|
|
|
self.alias_table[name] = (nargs, cmd)
|
|
|
|
|
|
def undefine_alias(self, name):
|
|
|
if self.alias_table.has_key(name):
|
|
|
del self.alias_table[name]
|
|
|
|
|
|
def validate_alias(self, name, cmd):
|
|
|
"""Validate an alias and return the its number of arguments."""
|
|
|
if name in self.no_alias:
|
|
|
raise InvalidAliasError("The name %s can't be aliased "
|
|
|
"because it is a keyword or builtin." % name)
|
|
|
if not (isinstance(cmd, basestring)):
|
|
|
raise InvalidAliasError("An alias command must be a string, "
|
|
|
"got: %r" % cmd)
|
|
|
nargs = cmd.count('%s')
|
|
|
if nargs>0 and cmd.find('%l')>=0:
|
|
|
raise InvalidAliasError('The %s and %l specifiers are mutually '
|
|
|
'exclusive in alias definitions.')
|
|
|
return nargs
|
|
|
|
|
|
def call_alias(self, alias, rest=''):
|
|
|
"""Call an alias given its name and the rest of the line."""
|
|
|
cmd = self.transform_alias(alias, rest)
|
|
|
try:
|
|
|
self.shell.system(cmd)
|
|
|
except:
|
|
|
self.shell.showtraceback()
|
|
|
|
|
|
def transform_alias(self, alias,rest=''):
|
|
|
"""Transform alias to system command string."""
|
|
|
nargs, cmd = self.alias_table[alias]
|
|
|
|
|
|
if ' ' in cmd and os.path.isfile(cmd):
|
|
|
cmd = '"%s"' % cmd
|
|
|
|
|
|
# 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 AliasError('Alias <%s> requires %s arguments, %s given.' %
|
|
|
(alias, nargs, len(args)))
|
|
|
cmd = '%s %s' % (cmd % tuple(args[:nargs]),' '.join(args[nargs:]))
|
|
|
return cmd
|
|
|
|
|
|
def expand_alias(self, line):
|
|
|
""" Expand an alias in the command line
|
|
|
|
|
|
Returns the provided command line, possibly with the first word
|
|
|
(command) translated according to alias expansion rules.
|
|
|
|
|
|
[ipython]|16> _ip.expand_aliases("np myfile.txt")
|
|
|
<16> 'q:/opt/np/notepad++.exe myfile.txt'
|
|
|
"""
|
|
|
|
|
|
pre,_,fn,rest = split_user_input(line)
|
|
|
res = pre + self.expand_aliases(fn, rest)
|
|
|
return res
|
|
|
|
|
|
def expand_aliases(self, fn, rest):
|
|
|
"""Expand multiple levels of aliases:
|
|
|
|
|
|
if:
|
|
|
|
|
|
alias foo bar /tmp
|
|
|
alias baz foo
|
|
|
|
|
|
then:
|
|
|
|
|
|
baz huhhahhei -> bar /tmp huhhahhei
|
|
|
"""
|
|
|
line = fn + " " + rest
|
|
|
|
|
|
done = set()
|
|
|
while 1:
|
|
|
pre,_,fn,rest = split_user_input(line, shell_line_split)
|
|
|
if fn in self.alias_table:
|
|
|
if fn in done:
|
|
|
warn("Cyclic alias definition, repeated '%s'" % fn)
|
|
|
return ""
|
|
|
done.add(fn)
|
|
|
|
|
|
l2 = self.transform_alias(fn, rest)
|
|
|
if l2 == line:
|
|
|
break
|
|
|
# ls -> ls -F should not recurse forever
|
|
|
if l2.split(None,1)[0] == line.split(None,1)[0]:
|
|
|
line = l2
|
|
|
break
|
|
|
line=l2
|
|
|
else:
|
|
|
break
|
|
|
|
|
|
return line
|
|
|
|
