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bzrlib/gpg.py
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# Copyright (C) 2005 Canonical Ltd
 
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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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"""GPG signing and checking logic."""
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import os
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import sys
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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import errno
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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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    ui,
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    )
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""")
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import bzrlib.errors as errors
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class DisabledGPGStrategy(object):
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    """A GPG Strategy that makes everything fail."""
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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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        self._config = config
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    def sign(self, content):
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        ui.ui_factory.clear_term()
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        preexec_fn = _set_gpg_tty
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        if sys.platform == 'win32':
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            # Win32 doesn't support preexec_fn, but wouldn't support TTY anyway.
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            preexec_fn = None
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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=preexec_fn)
 
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                                       stdout=subprocess.PIPE)
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            try:
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                result = process.communicate(content)[0]
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                if process.returncode is None: