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"""
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Functionality to allow establishing new slave contexts over an SSH connection.
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"""
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import commands
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import mitogen.master
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class Stream(mitogen.master.Stream):
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python_path = 'python'
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#: The path to the SSH binary.
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ssh_path = 'ssh'
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port = None
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def construct(self, hostname, username=None, ssh_path=None, port=None,
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check_host_keys=True, **kwargs):
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super(Stream, self).construct(**kwargs)
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self.hostname = hostname
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self.username = username
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self.port = port
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self.check_host_keys = check_host_keys
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if ssh_path:
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self.ssh_path = ssh_path
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def get_boot_command(self):
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bits = [self.ssh_path]
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bits += ['-o', 'BatchMode yes']
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if self.username:
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bits += ['-l', self.username]
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if self.port is not None:
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bits += ['-p', str(self.port)]
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if not self.check_host_keys:
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bits += [
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'-o', 'StrictHostKeyChecking no',
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'-o', 'UserKnownHostsFile /dev/null',
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]
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bits.append(self.hostname)
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base = super(Stream, self).get_boot_command()
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return bits + map(commands.mkarg, base)
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def connect(self):
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super(Stream, self).connect()
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self.name = 'ssh.' + self.hostname
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if self.port:
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self.name += ':%s' % (self.port,)
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