mirror of
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75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
# Copyright (C) 2012 Aldo Cortesi
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#
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# This program 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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#
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# This program 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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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import os, traceback
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class ScriptError(Exception):
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pass
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class Script:
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"""
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The instantiator should do something along this vein:
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s = Script(argv, master)
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s.load()
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"""
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def __init__(self, argv, ctx):
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self.argv = argv
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self.ctx = ctx
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self.ns = None
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def load(self):
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"""
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Loads a module.
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Raises ScriptError on failure, with argument equal to an error
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message that may be a formatted traceback.
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"""
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path = os.path.expanduser(self.argv[0])
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if not os.path.exists(path):
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raise ScriptError("No such file: %s" % path)
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if not os.path.isfile(path):
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raise ScriptError("Not a file: %s" % path)
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ns = {}
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try:
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execfile(path, ns, ns)
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self.ns = ns
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self.run("start", self.argv)
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except Exception, v:
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raise ScriptError(traceback.format_exc(v))
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def unload(self):
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return self.run("done")
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def run(self, name, *args, **kwargs):
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"""
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Runs a plugin method.
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Returns:
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(True, retval) on success.
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(False, None) on nonexistent method.
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(False, (exc, traceback string)) if there was an exception.
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"""
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f = self.ns.get(name)
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if f:
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try:
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return (True, f(self.ctx, *args, **kwargs))
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except Exception, v:
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return (False, (v, traceback.format_exc(v)))
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else:
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return (False, None)
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