Limnoria/src/repl.py
2003-11-26 18:21:12 +00:00

139 lines
4.6 KiB
Python

#!/usr/bin/env python
###
# Copyright (c) 2002, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
"""Old REPL from back in the day. Deprecated."""
__revision__ = "$Id$"
import fix
import sys
import traceback
from cStringIO import StringIO
import log
filename = 'repl'
NotYet = object()
class Repl(object):
def __init__(self, filename='repl'):
self.lines = []
self.filename = filename
self.namespace = {}
self.out = StringIO()
def compile(self, text):
ret = None
try:
code = compile(text, self.filename, 'eval')
sys.stdout = self.out
ret = eval(code, self.namespace, self.namespace)
sys.stdout = sys.__stdout__
self.out.reset()
if self.out.read():
ret = self.out.read() + ret
self.out.reset()
self.out.truncate()
self.namespace['_'] = ret
except:
try:
code = compile(text, self.filename, 'exec')
sys.stdout = self.out
exec code in self.namespace, self.namespace
sys.stdout = sys.__stdout__
self.out.reset()
if self.out.read():
ret = self.out.read() + ret
self.out.reset()
self.out.truncate()
except:
(E, e, tb) = sys.exc_info()
ret = ''.join(traceback.format_exception(E, e, tb))
del tb
return ret
def addLine(self, line):
line = line.rstrip()
self.lines.append(line)
if len(self.lines) > 100:
log.warning('Too many lines in Repl.')
self.lines = []
return None
if line == '' or line == '\n' or line == '\r\n':
text = '\n'.join(self.lines)+'\n\n'
ret = self.compile(text)
if ret is not NotYet:
self.lines = []
return ret
else:
try:
ret = eval(line, self.namespace, self.namespace)
self.lines = []
return ret
except SyntaxError:
try:
exec line in self.namespace, self.namespace
self.lines = []
return None
except:
pass
except:
(E, e, tb) = sys.exc_info()
return ''.join(traceback.format_exception(E, e, tb))
del tb
return NotYet
if __name__ == '__main__':
def writePrompt(prompt):
sys.stdout.write(prompt)
sys.stdout.flush()
prompt = '>>> '
repl = Repl()
while 1:
writePrompt(prompt)
s = sys.stdin.readline()
if s == '':
sys.exit(0)
ret = repl.addLine(s)
if ret is not NotYet:
if ret is not None:
s = str(ret)
sys.stdout.write(s)
if s[-1] != '\n':
sys.stdout.write('\n')
prompt = '>>> '
else:
prompt = '... '
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: