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# Bazaar-NG -- distributed version control
# Copyright (C) 2005 by Canonical Ltd
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Commit message editor support."""
import os
from subprocess import call
import bzrlib.config as config
from bzrlib.errors import BzrError
def _get_editor():
"""Return a sequence of possible editor binaries for the current platform"""
try:
yield os.environ["BZR_EDITOR"]
except KeyError:
pass
e = config.get_editor()
if e is not None:
yield e
try:
yield os.environ["EDITOR"]
except KeyError:
pass
if os.name == "nt":
yield "notepad.exe"
elif os.name == "posix":
yield "/usr/bin/vi"
def _run_editor(filename):
"""Try to execute an editor to edit the commit message."""
for e in _get_editor():
edargs = e.split(' ')
x = call(edargs + [filename])
if x == 0:
return True
elif x == 127:
continue
else:
break
raise BzrError("Could not start any editor. "
"Please specify $EDITOR or use ~/.bzr.conf/editor")
def edit_commit_message(infotext, ignoreline=None):
"""Let the user edit a commit message in a temp file.
This is run if they don't give a message or
message-containing file on the command line.
infotext:
Text to be displayed at bottom of message for
the user's reference; currently similar to
'bzr status'.
"""
import tempfile
if ignoreline is None:
ignoreline = "-- This line and the following will be ignored --"
try:
tmp_fileno, msgfilename = tempfile.mkstemp()
msgfile = os.close(tmp_fileno)
if infotext is not None and infotext != "":
hasinfo = True
msgfile = file(msgfilename, "w")
msgfile.write("\n\n%s\n\n%s" % (ignoreline, infotext))
msgfile.close()
else:
hasinfo = False
if not _run_editor(msgfilename):
return None
started = False
msg = []
lastline, nlines = 0, 0
for line in file(msgfilename, "r"):
stripped_line = line.strip()
# strip empty line before the log message starts
if not started:
if stripped_line != "":
started = True
else:
continue
# check for the ignore line only if there
# is additional information at the end
if hasinfo and stripped_line == ignoreline:
break
nlines += 1
# keep track of the last line that had some content
if stripped_line != "":
lastline = nlines
msg.append(line)
if len(msg) == 0:
return ""
# delete empty lines at the end
del msg[lastline:]
# add a newline at the end, if needed
if not msg[-1].endswith("\n"):
return "%s%s" % ("".join(msg), "\n")
else:
return "".join(msg)
finally:
# delete the msg file in any case
try: os.unlink(msgfilename)
except IOError: pass
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