mirror of
https://git.savannah.gnu.org/git/emacs.git
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237 lines
8.1 KiB
Python
237 lines
8.1 KiB
Python
"""Definitions used by commands sent to inferior Python in python.el."""
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# Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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# Author: Dave Love <fx@gnu.org>
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# This file is part of GNU Emacs.
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# GNU Emacs is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# GNU Emacs is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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import os, sys, traceback, inspect, __main__
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try:
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set
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except:
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from sets import Set as set
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__all__ = ["eexecfile", "eargs", "complete", "ehelp", "eimport", "modpath"]
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def format_exception (filename, should_remove_self):
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type, value, tb = sys.exc_info ()
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sys.last_type = type
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sys.last_value = value
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sys.last_traceback = tb
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if type is SyntaxError:
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try: # parse the error message
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msg, (dummy_filename, lineno, offset, line) = value
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except:
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pass # Not the format we expect; leave it alone
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else:
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# Stuff in the right filename
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value = SyntaxError(msg, (filename, lineno, offset, line))
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sys.last_value = value
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res = traceback.format_exception_only (type, value)
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# There are some compilation errors which do not provide traceback so we
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# should not massage it.
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if should_remove_self:
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tblist = traceback.extract_tb (tb)
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del tblist[:1]
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res = traceback.format_list (tblist)
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if res:
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res.insert(0, "Traceback (most recent call last):\n")
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res[len(res):] = traceback.format_exception_only (type, value)
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# traceback.print_exception(type, value, tb)
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for line in res: print line,
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def eexecfile (file):
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"""Execute FILE and then remove it.
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Execute the file within the __main__ namespace.
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If we get an exception, print a traceback with the top frame
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(ourselves) excluded."""
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# We cannot use real execfile since it has a bug where the file stays
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# locked forever (under w32) if SyntaxError occurs.
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# --- code based on code.py and PyShell.py.
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try:
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try:
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source = open (file, "r").read()
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code = compile (source, file, "exec")
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# Other exceptions (shouldn't be any...) will (correctly) fall
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# through to "final".
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except (OverflowError, SyntaxError, ValueError):
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# FIXME: When can compile() raise anything else than
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# SyntaxError ????
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format_exception (file, False)
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return
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try:
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exec code in __main__.__dict__
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except:
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format_exception (file, True)
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finally:
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os.remove (file)
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def eargs (name, imports):
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"Get arglist of NAME for Eldoc &c."
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try:
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if imports: exec imports
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parts = name.split ('.')
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if len (parts) > 1:
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exec 'import ' + parts[0] # might fail
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func = eval (name)
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if inspect.isbuiltin (func) or type(func) is type:
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doc = func.__doc__
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if doc.find (' ->') != -1:
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print '_emacs_out', doc.split (' ->')[0]
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else:
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print '_emacs_out', doc.split ('\n')[0]
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return
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if inspect.ismethod (func):
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func = func.im_func
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if not inspect.isfunction (func):
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print '_emacs_out '
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return
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(args, varargs, varkw, defaults) = inspect.getargspec (func)
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# No space between name and arglist for consistency with builtins.
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print '_emacs_out', \
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func.__name__ + inspect.formatargspec (args, varargs, varkw,
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defaults)
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except:
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print "_emacs_out "
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def all_names (object):
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"""Return (an approximation to) a list of all possible attribute
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names reachable via the attributes of OBJECT, i.e. roughly the
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leaves of the dictionary tree under it."""
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def do_object (object, names):
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if inspect.ismodule (object):
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do_module (object, names)
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elif inspect.isclass (object):
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do_class (object, names)
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# Might have an object without its class in scope.
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elif hasattr (object, '__class__'):
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names.add ('__class__')
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do_class (object.__class__, names)
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# Probably not a good idea to try to enumerate arbitrary
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# dictionaries...
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return names
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def do_module (module, names):
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if hasattr (module, '__all__'): # limited export list
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names.update(module.__all__)
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for i in module.__all__:
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do_object (getattr (module, i), names)
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else: # use all names
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names.update(dir (module))
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for i in dir (module):
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do_object (getattr (module, i), names)
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return names
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def do_class (object, names):
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ns = dir (object)
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names.update(ns)
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if hasattr (object, '__bases__'): # superclasses
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for i in object.__bases__: do_object (i, names)
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return names
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return do_object (object, set([]))
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def complete (name, imports):
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"""Complete TEXT in NAMESPACE and print a Lisp list of completions.
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Exec IMPORTS first."""
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import __main__, keyword
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def class_members(object):
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names = dir (object)
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if hasattr (object, '__bases__'):
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for super in object.__bases__:
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names = class_members (super)
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return names
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names = set([])
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base = None
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try:
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dict = __main__.__dict__.copy()
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if imports: exec imports in dict
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l = len (name)
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if not "." in name:
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for src in [dir (__builtins__), keyword.kwlist, dict.keys()]:
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for elt in src:
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if elt[:l] == name: names.add(elt)
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else:
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base = name[:name.rfind ('.')]
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name = name[name.rfind('.')+1:]
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try:
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object = eval (base, dict)
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names = set(dir (object))
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if hasattr (object, '__class__'):
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names.add('__class__')
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names.update(class_members (object))
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except: names = all_names (dict)
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except:
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print sys.exc_info()
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names = []
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l = len(name)
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print '_emacs_out (',
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for n in names:
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if name == n[:l]:
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if base: print '"%s.%s"' % (base, n),
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else: print '"%s"' % n,
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print ')'
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def ehelp (name, imports):
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"""Get help on string NAME.
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First try to eval name for, e.g. user definitions where we need
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the object. Otherwise try the string form."""
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locls = {}
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if imports:
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try: exec imports in locls
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except: pass
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try: help (eval (name, globals(), locls))
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except: help (name)
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def eimport (mod, dir):
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"""Import module MOD with directory DIR at the head of the search path.
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NB doesn't load from DIR if MOD shadows a system module."""
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from __main__ import __dict__
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path0 = sys.path[0]
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sys.path[0] = dir
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try:
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try:
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if __dict__.has_key(mod) and inspect.ismodule (__dict__[mod]):
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reload (__dict__[mod])
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else:
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__dict__[mod] = __import__ (mod)
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except:
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(type, value, tb) = sys.exc_info ()
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print "Traceback (most recent call last):"
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traceback.print_exception (type, value, tb.tb_next)
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finally:
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sys.path[0] = path0
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def modpath (module):
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"""Return the source file for the given MODULE (or None).
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Assumes that MODULE.py and MODULE.pyc are in the same directory."""
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try:
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path = __import__ (module).__file__
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if path[-4:] == '.pyc' and os.path.exists (path[0:-1]):
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path = path[:-1]
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print "_emacs_out", path
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except:
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print "_emacs_out ()"
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# print '_emacs_ok' # ready for input and can call continuation
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