1
# Copyright (C) 2005-2011 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
"""Commit message editor support."""
19
from __future__ import absolute_import
23
from subprocess import call
34
from .errors import BzrError, BadCommitMessageEncoding
35
from .hooks import Hooks
42
"""Return a sequence of possible editor binaries for the current platform"""
44
yield os.environ["BRZ_EDITOR"], '$BRZ_EDITOR'
48
e = config.GlobalStack().get('editor')
50
yield e, config.config_filename()
52
for varname in 'VISUAL', 'EDITOR':
53
if varname in os.environ:
54
yield os.environ[varname], '$' + varname
56
if sys.platform == 'win32':
57
for editor in 'wordpad.exe', 'notepad.exe':
60
for editor in ['/usr/bin/editor', 'vi', 'pico', 'nano', 'joe']:
64
def _run_editor(filename):
65
"""Try to execute an editor to edit the commit message."""
66
for candidate, candidate_source in _get_editor():
67
edargs = cmdline.split(candidate)
69
## mutter("trying editor: %r", (edargs +[filename]))
70
x = call(edargs + [filename])
72
if candidate_source is not None:
73
# We tried this editor because some user configuration (an
74
# environment variable or config file) said to try it. Let
75
# the user know their configuration is broken.
77
'Could not start editor "%s" (specified by %s): %s\n'
78
% (candidate, candidate_source, str(e)))
87
raise BzrError("Could not start any editor.\nPlease specify one with:\n"
88
" - $BRZ_EDITOR\n - editor=/some/path in %s\n"
89
" - $VISUAL\n - $EDITOR" % \
90
config.config_filename())
93
DEFAULT_IGNORE_LINE = "%(bar)s %(msg)s %(bar)s" % \
94
{ 'bar' : '-' * 14, 'msg' : 'This line and the following will be ignored' }
97
def edit_commit_message(infotext, ignoreline=DEFAULT_IGNORE_LINE,
99
"""Let the user edit a commit message in a temp file.
101
This is run if they don't give a message or
102
message-containing file on the command line.
104
:param infotext: Text to be displayed at bottom of message
105
for the user's reference;
106
currently similar to 'bzr status'.
108
:param ignoreline: The separator to use above the infotext.
110
:param start_message: The text to place above the separator, if any.
111
This will not be removed from the message
112
after the user has edited it.
114
:return: commit message or None.
117
if not start_message is None:
118
start_message = start_message.encode(osutils.get_user_encoding())
119
infotext = infotext.encode(osutils.get_user_encoding(), 'replace')
120
return edit_commit_message_encoded(infotext, ignoreline, start_message)
123
def edit_commit_message_encoded(infotext, ignoreline=DEFAULT_IGNORE_LINE,
125
"""Let the user edit a commit message in a temp file.
127
This is run if they don't give a message or
128
message-containing file on the command line.
130
:param infotext: Text to be displayed at bottom of message
131
for the user's reference;
132
currently similar to 'bzr status'.
133
The string is already encoded
135
:param ignoreline: The separator to use above the infotext.
137
:param start_message: The text to place above the separator, if any.
138
This will not be removed from the message
139
after the user has edited it.
140
The string is already encoded
142
:return: commit message or None.
146
msgfilename, hasinfo = _create_temp_file_with_commit_template(
147
infotext, ignoreline, start_message)
150
basename = osutils.basename(msgfilename)
151
msg_transport = transport.get_transport_from_path(osutils.dirname(msgfilename))
152
reference_content = msg_transport.get_bytes(basename)
153
if not _run_editor(msgfilename):
155
edited_content = msg_transport.get_bytes(basename)
156
if edited_content == reference_content:
157
if not ui.ui_factory.confirm_action(
158
u"Commit message was not edited, use anyway",
159
"breezy.msgeditor.unchanged",
161
# Returning "" makes cmd_commit raise 'empty commit message
162
# specified' which is a reasonable error, given the user has
163
# rejected using the unedited template.
167
lastline, nlines = 0, 0
168
# codecs.open() ALWAYS opens file in binary mode but we need text mode
169
# 'rU' mode useful when bzr.exe used on Cygwin (bialix 20070430)
170
f = file(msgfilename, 'rU')
173
for line in codecs.getreader(osutils.get_user_encoding())(f):
174
stripped_line = line.strip()
175
# strip empty line before the log message starts
177
if stripped_line != "":
181
# check for the ignore line only if there
182
# is additional information at the end
183
if hasinfo and stripped_line == ignoreline:
186
# keep track of the last line that had some content
187
if stripped_line != "":
190
except UnicodeDecodeError:
191
raise BadCommitMessageEncoding()
197
# delete empty lines at the end
199
# add a newline at the end, if needed
200
if not msg[-1].endswith("\n"):
201
return "%s%s" % ("".join(msg), "\n")
205
# delete the msg file in any case
206
if msgfilename is not None:
208
os.unlink(msgfilename)
211
"failed to unlink %s: %s; ignored", msgfilename, e)
214
def _create_temp_file_with_commit_template(infotext,
215
ignoreline=DEFAULT_IGNORE_LINE,
218
"""Create temp file and write commit template in it.
220
:param infotext: Text to be displayed at bottom of message for the
221
user's reference; currently similar to 'bzr status'. The text is
224
:param ignoreline: The separator to use above the infotext.
226
:param start_message: The text to place above the separator, if any.
227
This will not be removed from the message after the user has edited
228
it. The string is already encoded
230
:return: 2-tuple (temp file name, hasinfo)
233
tmp_fileno, msgfilename = tempfile.mkstemp(prefix='bzr_log.',
234
dir=tmpdir, text=True)
235
msgfile = os.fdopen(tmp_fileno, 'w')
237
if start_message is not None:
238
msgfile.write("%s\n" % start_message)
240
if infotext is not None and infotext != "":
242
msgfile.write("\n\n%s\n\n%s" %(ignoreline, infotext))
248
return (msgfilename, hasinfo)
251
def make_commit_message_template(working_tree, specific_files):
252
"""Prepare a template file for a commit into a branch.
254
Returns a unicode string containing the template.
256
# TODO: make provision for this to be overridden or modified by a hook
258
# TODO: Rather than running the status command, should prepare a draft of
259
# the revision to be committed, then pause and ask the user to
260
# confirm/write a message.
261
from .status import show_tree_status
262
status_tmp = StringIO()
263
show_tree_status(working_tree, specific_files=specific_files,
264
to_file=status_tmp, verbose=True)
265
return status_tmp.getvalue()
268
def make_commit_message_template_encoded(working_tree, specific_files,
269
diff=None, output_encoding='utf-8'):
270
"""Prepare a template file for a commit into a branch.
272
Returns an encoded string.
274
# TODO: make provision for this to be overridden or modified by a hook
276
# TODO: Rather than running the status command, should prepare a draft of
277
# the revision to be committed, then pause and ask the user to
278
# confirm/write a message.
279
from .diff import show_diff_trees
281
template = make_commit_message_template(working_tree, specific_files)
282
template = template.encode(output_encoding, "replace")
286
show_diff_trees(working_tree.basis_tree(),
287
working_tree, stream, specific_files,
288
path_encoding=output_encoding)
289
template = template + '\n' + stream.getvalue()
294
class MessageEditorHooks(Hooks):
295
"""A dictionary mapping hook name to a list of callables for message editor
298
e.g. ['commit_message_template'] is the list of items to be called to
299
generate a commit message template
303
"""Create the default hooks.
305
These are all empty initially.
307
Hooks.__init__(self, "breezy.msgeditor", "hooks")
308
self.add_hook('set_commit_message',
309
"Set a fixed commit message. "
310
"set_commit_message is called with the "
311
"breezy.commit.Commit object (so you can also change e.g. revision "
312
"properties by editing commit.builder._revprops) and the message "
313
"so far. set_commit_message must return the message to use or None"
314
" if it should use the message editor as normal.", (2, 4))
315
self.add_hook('commit_message_template',
316
"Called when a commit message is being generated. "
317
"commit_message_template is called with the breezy.commit.Commit "
318
"object and the message that is known so far. "
319
"commit_message_template must return a new message to use (which "
320
"could be the same as it was given). When there are multiple "
321
"hooks registered for commit_message_template, they are chained "
322
"with the result from the first passed into the second, and so "
326
hooks = MessageEditorHooks()
329
def set_commit_message(commit, start_message=None):
330
"""Sets the commit message.
331
:param commit: Commit object for the active commit.
332
:return: The commit message or None to continue using the message editor
335
for hook in hooks['set_commit_message']:
336
start_message = hook(commit, start_message)
340
def generate_commit_message_template(commit, start_message=None):
341
"""Generate a commit message template.
343
:param commit: Commit object for the active commit.
344
:param start_message: Message to start with.
345
:return: A start commit message or None for an empty start commit message.
348
for hook in hooks['commit_message_template']:
349
start_message = hook(commit, start_message)