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  • Committer: John Arbash Meinel
  • Date: 2006-08-18 22:17:03 UTC
  • mto: This revision was merged to the branch mainline in revision 1989.
  • Revision ID: john@arbash-meinel.com-20060818221703-958786fafe340fd9
2 changes to knits. Delay creating the .knit or .kndx file until we have actually tried to write data. Because of this, we must allow the Knit to create the prefix directories

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bzrlib/gpg.py
 
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# Copyright (C) 2005 by Canonical Ltd
 
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#   Authors: Robert Collins <robert.collins@canonical.com>
 
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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 2 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, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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"""GPG signing and checking logic."""
 
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import errno
 
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import os
 
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import subprocess
 
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from bzrlib import (
 
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    errors,
 
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    trace,
 
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    )
 
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class DisabledGPGStrategy(object):
 
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    """A GPG Strategy that makes everything fail."""
 
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    def __init__(self, ignored):
 
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        """Real strategies take a configuration."""
 
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    def sign(self, content):
 
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        raise errors.SigningFailed('Signing is disabled.')
 
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class LoopbackGPGStrategy(object):
 
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    """A GPG Strategy that acts like 'cat' - data is just passed through."""
 
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    def __init__(self, ignored):
 
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        """Real strategies take a configuration."""
 
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    def sign(self, content):
 
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        return content
 
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def _set_gpg_tty():
 
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    tty = os.environ.get('TTY')
 
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    if tty is not None:
 
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        os.environ['GPG_TTY'] = tty
 
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        trace.mutter('setting GPG_TTY=%s', tty)
 
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    else:
 
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        # This is not quite worthy of a warning, because some people
 
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        # don't need GPG_TTY to be set. But it is worthy of a big mark
 
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        # in ~/.bzr.log, so that people can debug it if it happens to them
 
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        trace.mutter('** Env var TTY empty, cannot set GPG_TTY.'
 
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                     '  Is TTY exported?')
 
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class GPGStrategy(object):
 
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    """GPG Signing and checking facilities."""
 
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    def _command_line(self):
 
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        return [self._config.gpg_signing_command(), '--clearsign']
 
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    def __init__(self, config):
 
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        self._config = config
 
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    def sign(self, content):
 
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        try:
 
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            process = subprocess.Popen(self._command_line(),
 
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                                       stdin=subprocess.PIPE,
 
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                                       stdout=subprocess.PIPE,
 
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                                       preexec_fn=_set_gpg_tty)
 
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            try:
 
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                result = process.communicate(content)[0]
 
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                if process.returncode is None:
 
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                    process.wait()
 
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                if process.returncode != 0:
 
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                    raise errors.SigningFailed(self._command_line())
 
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                return result
 
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            except OSError, e:
 
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                if e.errno == errno.EPIPE:
 
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                    raise errors.SigningFailed(self._command_line())
 
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                else:
 
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                    raise
 
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        except ValueError:
 
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            # bad subprocess parameters, should never happen.
 
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            raise
 
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        except OSError, e:
 
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            if e.errno == errno.ENOENT:
 
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                # gpg is not installed
 
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                raise errors.SigningFailed(self._command_line())
 
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            else:
 
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                raise