mirror of https://github.com/python/cpython.git
102 lines
3.0 KiB
Python
102 lines
3.0 KiB
Python
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"""Remote
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This module is imported by the loader and serves to control
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the execution of the user program. It presently executes files
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and reports exceptions to IDLE. It could be extended to provide
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other services, such as interactive mode and debugging. To that
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end, it could be a subclass of e.g. InteractiveInterpreter.
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Two other classes, pseudoIn and pseudoOut, are file emulators also
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used by loader.
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"""
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import sys, os
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import traceback
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class Remote:
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def __init__(self, main, master):
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self.main = main
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self.master = master
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self.this_file = self.canonic( self.__init__.im_func.func_code.co_filename )
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def canonic(self, path):
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return os.path.normcase(os.path.abspath(path))
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def mainloop(self):
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while 1:
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args = self.master.get_command()
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try:
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f = getattr(self,args[0])
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apply(f,args[1:])
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except:
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if not self.report_exception(): raise
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def finish(self):
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sys.exit()
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def run(self, *argv):
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sys.argv = argv
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path = self.canonic( argv[0] )
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dir = self.dir = os.path.dirname(path)
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os.chdir(dir)
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sys.path[0] = dir
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usercode = open(path)
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exec usercode in self.main
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def report_exception(self):
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try:
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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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tblist = traceback.extract_tb(tb)
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# Look through the traceback, canonicalizing filenames and
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# eliminating leading and trailing system modules.
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first = last = 1
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for i in range(len(tblist)):
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filename, lineno, name, line = tblist[i]
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filename = self.canonic(filename)
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tblist[i] = filename, lineno, name, line
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dir = os.path.dirname(filename)
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if filename == self.this_file:
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first = i+1
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elif dir==self.dir:
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last = i+1
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# Canonicalize the filename in a syntax error, too:
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if type is SyntaxError:
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try:
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msg, (filename, lineno, offset, line) = value
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filename = self.canonic(filename)
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value = msg, (filename, lineno, offset, line)
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except:
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pass
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return self.master.program_exception( type, value, tblist, first, last )
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finally:
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# avoid any circular reference through the traceback
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del tb
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class pseudoIn:
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def __init__(self, readline):
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self.readline = readline
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def isatty():
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return 1
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class pseudoOut:
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def __init__(self, func, **kw):
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self.func = func
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self.kw = kw
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def write(self, *args):
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return apply( self.func, args, self.kw )
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def writelines(self, l):
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map(self.write, l)
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def flush(self):
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pass
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