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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Commit message editor support."""
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from __future__ import absolute_import
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from subprocess import call
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from bzrlib.errors import BzrError, BadCommitMessageEncoding
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from bzrlib.hooks import HookPoint, Hooks
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from .errors import BzrError
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from .hooks import Hooks
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class BadCommitMessageEncoding(BzrError):
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_fmt = 'The specified commit message contains characters unsupported by '\
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'the current encoding.'
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"""Return a sequence of possible editor binaries for the current platform"""
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"""Return sequence of possible editor binaries for the current platform"""
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yield os.environ["BZR_EDITOR"], '$BZR_EDITOR'
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yield os.environ["BRZ_EDITOR"], '$BRZ_EDITOR'
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e = config.GlobalConfig().get_editor()
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e = config.GlobalStack().get('editor')
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yield e, config.config_filename()
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yield e, bedding.config_path()
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for varname in 'VISUAL', 'EDITOR':
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if varname in os.environ:
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def _run_editor(filename):
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"""Try to execute an editor to edit the commit message."""
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for candidate, candidate_source in _get_editor():
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edargs = candidate.split(' ')
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edargs = cmdline.split(candidate)
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## mutter("trying editor: %r", (edargs +[filename]))
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x = call(edargs + [filename])
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if candidate_source is not None:
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# We tried this editor because some user configuration (an
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# environment variable or config file) said to try it. Let
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raise BzrError("Could not start any editor.\nPlease specify one with:\n"
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" - $BZR_EDITOR\n - editor=/some/path in %s\n"
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" - $VISUAL\n - $EDITOR" % \
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config.config_filename())
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" - $BRZ_EDITOR\n - editor=/some/path in %s\n"
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" - $VISUAL\n - $EDITOR" %
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bedding.config_path())
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DEFAULT_IGNORE_LINE = "%(bar)s %(msg)s %(bar)s" % \
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{ 'bar' : '-' * 14, 'msg' : 'This line and the following will be ignored' }
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{'bar': '-' * 14, 'msg': 'This line and the following will be ignored'}
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def edit_commit_message(infotext, ignoreline=DEFAULT_IGNORE_LINE,
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:return: commit message or None.
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if not start_message is None:
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if start_message is not None:
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start_message = start_message.encode(osutils.get_user_encoding())
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infotext = infotext.encode(osutils.get_user_encoding(), 'replace')
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return edit_commit_message_encoded(infotext, ignoreline, start_message)
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msgfilename = None
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msgfilename, hasinfo = _create_temp_file_with_commit_template(
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infotext, ignoreline, start_message)
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infotext, ignoreline, start_message)
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if not msgfilename:
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basename = osutils.basename(msgfilename)
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msg_transport = transport.get_transport(osutils.dirname(msgfilename))
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msg_transport = transport.get_transport_from_path(
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osutils.dirname(msgfilename))
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reference_content = msg_transport.get_bytes(basename)
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if not _run_editor(msgfilename):
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edited_content = msg_transport.get_bytes(basename)
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if edited_content == reference_content:
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if not ui.ui_factory.get_boolean(
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"Commit message was not edited, use anyway"):
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if not ui.ui_factory.confirm_action(
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u"Commit message was not edited, use anyway",
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"breezy.msgeditor.unchanged",
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# Returning "" makes cmd_commit raise 'empty commit message
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# specified' which is a reasonable error, given the user has
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# rejected using the unedited template.
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lastline, nlines = 0, 0
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# codecs.open() ALWAYS opens file in binary mode but we need text mode
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# 'rU' mode useful when bzr.exe used on Cygwin (bialix 20070430)
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f = file(msgfilename, 'rU')
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with codecs.open(msgfilename, mode='rb', encoding=osutils.get_user_encoding()) as f:
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for line in codecs.getreader(osutils.get_user_encoding())(f):
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stripped_line = line.strip()
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# strip empty line before the log message starts
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if msgfilename is not None:
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os.unlink(msgfilename)
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"failed to unlink %s: %s; ignored", msgfilename, e)
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def _create_temp_file_with_commit_template(infotext,
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ignoreline=DEFAULT_IGNORE_LINE,
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"""Create temp file and write commit template in it.
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:param infotext: Text to be displayed at bottom of message
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for the user's reference;
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currently similar to 'bzr status'.
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The text is already encoded.
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:param infotext: Text to be displayed at bottom of message for the
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user's reference; currently similar to 'bzr status'. The text is
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:param ignoreline: The separator to use above the infotext.
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:param start_message: The text to place above the separator, if any.
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This will not be removed from the message
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after the user has edited it.
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The string is already encoded
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:param start_message: The text to place above the separator, if any.
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This will not be removed from the message after the user has edited
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it. The string is already encoded
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:return: 2-tuple (temp file name, hasinfo)
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tmp_fileno, msgfilename = tempfile.mkstemp(prefix='bzr_log.',
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msgfilename = osutils.basename(msgfilename)
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msgfile = os.fdopen(tmp_fileno, 'w')
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dir=tmpdir, text=True)
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with os.fdopen(tmp_fileno, 'wb') as msgfile:
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if start_message is not None:
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msgfile.write("%s\n" % start_message)
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msgfile.write(b"%s\n" % start_message)
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if infotext is not None and infotext != "":
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msgfile.write("\n\n%s\n\n%s" %(ignoreline, infotext))
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trailer = b"\n\n%s\n\n%s" % (
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ignoreline.encode(osutils.get_user_encoding()), infotext)
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msgfile.write(trailer)
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return (msgfilename, hasinfo)
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# TODO: Rather than running the status command, should prepare a draft of
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# the revision to be committed, then pause and ask the user to
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# confirm/write a message.
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from StringIO import StringIO # must be unicode-safe
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from bzrlib.status import show_tree_status
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from .status import show_tree_status
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status_tmp = StringIO()
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show_tree_status(working_tree, specific_files=specific_files,
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to_file=status_tmp, verbose=True)
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# TODO: Rather than running the status command, should prepare a draft of
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# the revision to be committed, then pause and ask the user to
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# confirm/write a message.
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from StringIO import StringIO # must be unicode-safe
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from bzrlib.diff import show_diff_trees
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from .diff import show_diff_trees
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template = make_commit_message_template(working_tree, specific_files)
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template = template.encode(output_encoding, "replace")
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show_diff_trees(working_tree.basis_tree(),
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working_tree, stream, specific_files,
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path_encoding=output_encoding)
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template = template + '\n' + stream.getvalue()
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template = template + b'\n' + stream.getvalue()
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These are all empty initially.
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self.create_hook(HookPoint('commit_message_template',
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Hooks.__init__(self, "breezy.msgeditor", "hooks")
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'set_commit_message',
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"Set a fixed commit message. "
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"set_commit_message is called with the "
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"breezy.commit.Commit object (so you can also change e.g. "
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"revision properties by editing commit.builder._revprops) and the "
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"message so far. set_commit_message must return the message to "
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"use or None if it should use the message editor as normal.",
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'commit_message_template',
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"Called when a commit message is being generated. "
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"commit_message_template is called with the bzrlib.commit.Commit "
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"commit_message_template is called with the breezy.commit.Commit "
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"object and the message that is known so far. "
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"commit_message_template must return a new message to use (which "
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"could be the same as it was given. When there are multiple "
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"could be the same as it was given). When there are multiple "
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"hooks registered for commit_message_template, they are chained "
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"with the result from the first passed into the second, and so "
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"on.", (1, 10), None))
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hooks = MessageEditorHooks()
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def set_commit_message(commit, start_message=None):
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"""Sets the commit message.
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:param commit: Commit object for the active commit.
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:return: The commit message or None to continue using the message editor
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for hook in hooks['set_commit_message']:
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start_message = hook(commit, start_message)
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def generate_commit_message_template(commit, start_message=None):
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"""Generate a commit message template.