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Merge from integration.

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bzrlib/externalcommand.py
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import sys
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from bzrlib.commands import Command
 
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from bzrlib.osutils import pathjoin
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class ExternalCommand(Command):
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            ## Empty directories are not real paths
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            if not dir:
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                continue
 
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            # This needs to be os.path.join() or windows cannot
 
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            # find the batch file that you are wanting to execute
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            path = os.path.join(dir, cmd)
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            if os.path.isfile(path):
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                return ExternalCommand(path)
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    def __init__(self, path):
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        self.path = path
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    def name(self):
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        return self.path.split(os.sep)[-1]
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        return os.path.basename(self.path)
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    def run(self, *args, **kwargs):
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        raise NotImplementedError('should not be called on %r' % self)
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    def run_argv(self, argv):
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        return os.spawnv(os.P_WAIT, self.path, [self.path] + argv)
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    def help(self):
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        m = 'external command from %s\n\n' % self.path
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        pipe = os.popen('%s --help' % self.path)
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        return m + pipe.read()
 
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