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# Copyright (C) 2008 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
from cStringIO import StringIO
import shutil
import sys
import tempfile
from bzrlib import (
builtins,
delta,
diff,
errors,
osutils,
patches,
shelf,
textfile,
trace,
ui,
workingtree,
)
class Shelver(object):
"""Interactively shelve the changes in a working tree."""
def __init__(self, work_tree, target_tree, diff_writer=None, auto=False,
auto_apply=False, file_list=None, message=None):
"""Constructor.
:param work_tree: The working tree to shelve changes from.
:param target_tree: The "unchanged" / old tree to compare the
work_tree to.
:param auto: If True, shelve each possible change.
:param auto_apply: If True, shelve changes with no final prompt.
:param file_list: If supplied, only files in this list may be shelved.
:param message: The message to associate with the shelved changes.
"""
self.work_tree = work_tree
self.target_tree = target_tree
self.diff_writer = diff_writer
if self.diff_writer is None:
self.diff_writer = sys.stdout
self.manager = work_tree.get_shelf_manager()
self.auto = auto
self.auto_apply = auto_apply
self.file_list = file_list
self.message = message
@classmethod
def from_args(klass, diff_writer, revision=None, all=False, file_list=None,
message=None, directory='.'):
"""Create a shelver from commandline arguments.
:param revision: RevisionSpec of the revision to compare to.
:param all: If True, shelve all changes without prompting.
:param file_list: If supplied, only files in this list may be shelved.
:param message: The message to associate with the shelved changes.
:param directory: The directory containing the working tree.
"""
tree, path = workingtree.WorkingTree.open_containing(directory)
target_tree = builtins._get_one_revision_tree('shelf2', revision,
tree.branch, tree)
return klass(tree, target_tree, diff_writer, all, all, file_list,
message)
def run(self):
"""Interactively shelve the changes."""
creator = shelf.ShelfCreator(self.work_tree, self.target_tree,
self.file_list)
self.tempdir = tempfile.mkdtemp()
changes_shelved = 0
try:
for change in creator.iter_shelvable():
if change[0] == 'modify text':
try:
changes_shelved += self.handle_modify_text(creator,
change[1])
except errors.BinaryFile:
if self.prompt_bool('Shelve binary changes?'):
changes_shelved += 1
creator.shelve_content_change(change[1])
if change[0] == 'add file':
if self.prompt_bool('Shelve adding file "%s"?'
% change[3]):
creator.shelve_creation(change[1])
changes_shelved += 1
if change[0] == 'delete file':
if self.prompt_bool('Shelve removing file "%s"?'
% change[3]):
creator.shelve_deletion(change[1])
changes_shelved += 1
if change[0] == 'change kind':
if self.prompt_bool('Shelve changing "%s" from %s to %s? '
% (change[4], change[2], change[3])):
creator.shelve_content_change(change[1])
changes_shelved += 1
if change[0] == 'rename':
if self.prompt_bool('Shelve renaming "%s" => "%s"?' %
change[2:]):
creator.shelve_rename(change[1])
changes_shelved += 1
if changes_shelved > 0:
trace.note("Selected changes:")
changes = creator.work_transform.iter_changes()
reporter = delta._ChangeReporter()
delta.report_changes(changes, reporter)
if (self.auto_apply or self.prompt_bool(
'Shelve %d change(s)?' % changes_shelved)):
shelf_id = self.manager.shelve_changes(creator,
self.message)
trace.note('Changes shelved with id "%d".' % shelf_id)
else:
trace.warning('No changes to shelve.')
finally:
shutil.rmtree(self.tempdir)
creator.finalize()
def get_parsed_patch(self, file_id):
"""Return a parsed version of a file's patch.
:param file_id: The id of the file to generate a patch for.
:return: A patches.Patch.
"""
old_path = self.target_tree.id2path(file_id)
new_path = self.work_tree.id2path(file_id)
diff_file = StringIO()
text_differ = diff.DiffText(self.target_tree, self.work_tree,
diff_file)
patch = text_differ.diff(file_id, old_path, new_path, 'file', 'file')
diff_file.seek(0)
return patches.parse_patch(diff_file)
def prompt(self, message):
"""Prompt the user for a character.
:param message: The message to prompt a user with.
:return: A character.
"""
sys.stdout.write(message)
char = osutils.getchar()
sys.stdout.write("\r" + ' ' * len(message) + '\r')
sys.stdout.flush()
return char
def prompt_bool(self, question):
"""Prompt the user with a yes/no question.
This may be overridden by self.auto. It may also *set* self.auto. It
may also raise UserAbort.
:param question: The question to ask the user.
:return: True or False
"""
if self.auto:
return True
char = self.prompt(question + ' [yNfq]')
if char == 'y':
return True
elif char == 'f':
self.auto = True
return True
if char == 'q':
raise errors.UserAbort()
else:
return False
def handle_modify_text(self, creator, file_id):
"""Provide diff hunk selection for modified text.
:param creator: a ShelfCreator
:param file_id: The id of the file to shelve.
:return: number of shelved hunks.
"""
target_lines = self.target_tree.get_file_lines(file_id)
textfile.check_text_lines(self.work_tree.get_file_lines(file_id))
textfile.check_text_lines(target_lines)
parsed = self.get_parsed_patch(file_id)
final_hunks = []
if not self.auto:
offset = 0
self.diff_writer.write(parsed.get_header())
for hunk in parsed.hunks:
self.diff_writer.write(str(hunk))
if not self.prompt_bool('Shelve?'):
hunk.mod_pos += offset
final_hunks.append(hunk)
else:
offset -= (hunk.mod_range - hunk.orig_range)
sys.stdout.flush()
if len(parsed.hunks) == len(final_hunks):
return 0
patched = patches.iter_patched_from_hunks(target_lines, final_hunks)
creator.shelve_lines(file_id, list(patched))
return len(parsed.hunks) - len(final_hunks)
class Unshelver(object):
"""Unshelve changes into a working tree."""
@classmethod
def from_args(klass, shelf_id=None, action='apply', directory='.'):
"""Create an unshelver from commandline arguments.
:param shelf_id: Integer id of the shelf, as a string.
:param action: action to perform. May be 'apply', 'dry-run',
'delete'.
:param directory: The directory to unshelve changes into.
"""
tree, path = workingtree.WorkingTree.open_containing(directory)
manager = tree.get_shelf_manager()
if shelf_id is not None:
shelf_id = int(shelf_id)
else:
shelf_id = manager.last_shelf()
if shelf_id is None:
raise errors.BzrCommandError('No changes are shelved.')
trace.note('Unshelving changes with id "%d".' % shelf_id)
apply_changes = True
delete_shelf = True
read_shelf = True
if action == 'dry-run':
apply_changes = False
delete_shelf = False
if action == 'delete-only':
apply_changes = False
read_shelf = False
return klass(tree, manager, shelf_id, apply_changes, delete_shelf,
read_shelf)
def __init__(self, tree, manager, shelf_id, apply_changes=True,
delete_shelf=True, read_shelf=True):
"""Constructor.
:param tree: The working tree to unshelve into.
:param manager: The ShelveManager containing the shelved changes.
:param shelf_id:
:param apply_changes: If True, apply the shelved changes to the
working tree.
:param delete_shelf: If True, delete the changes from the shelf.
:param read_shelf: If True, read the changes from the shelf.
"""
self.tree = tree
manager = tree.get_shelf_manager()
self.manager = manager
self.shelf_id = shelf_id
self.apply_changes = apply_changes
self.delete_shelf = delete_shelf
self.read_shelf = read_shelf
def run(self):
"""Perform the unshelving operation."""
self.tree.lock_write()
cleanups = [self.tree.unlock]
try:
if self.read_shelf:
unshelver = self.manager.get_unshelver(self.shelf_id)
cleanups.append(unshelver.finalize)
if unshelver.message is not None:
trace.note('Message: %s' % unshelver.message)
change_reporter = delta._ChangeReporter()
merger = unshelver.make_merger()
merger.change_reporter = change_reporter
if self.apply_changes:
pb = ui.ui_factory.nested_progress_bar()
try:
merger.do_merge()
finally:
pb.finished()
else:
self.show_changes(merger)
if self.delete_shelf:
self.manager.delete_shelf(self.shelf_id)
finally:
for cleanup in reversed(cleanups):
cleanup()
def show_changes(self, merger):
"""Show the changes that this operation specifies."""
tree_merger = merger.make_merger()
# This implicitly shows the changes via the reporter, so we're done...
tt = tree_merger.make_preview_transform()
tt.finalize()
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