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import os
import sys
from datetime import datetime
from errors import CommandError, PatchFailed
from hunk_selector import ShelveHunkSelector, UnshelveHunkSelector
from patch import run_patch
from patchsource import FilePatchSource
from bzrlib.osutils import rename
class Shelf(object):
MESSAGE_PREFIX = "# Shelved patch: "
_paths = {
'base' : '.shelf',
'shelves' : '.shelf/shelves',
'current-shelf' : '.shelf/current-shelf',
}
def __init__(self, base, name=None):
self.base = base
self.__setup()
if name is None:
current = os.path.join(self.base, self._paths['current-shelf'])
name = open(current).read().strip()
assert '\n' not in name
self.name = name
self.dir = os.path.join(self.base, self._paths['shelves'], name)
if not os.path.isdir(self.dir):
os.mkdir(self.dir)
def __setup(self):
# Create required directories etc.
for dir in [self._paths['base'], self._paths['shelves']]:
dir = os.path.join(self.base, dir)
if not os.path.isdir(dir):
os.mkdir(dir)
current = os.path.join(self.base, self._paths['current-shelf'])
if not os.path.exists(current):
f = open(current, 'w')
f.write('default')
f.close()
def make_default(self):
f = open(os.path.join(self.base, self._paths['current-shelf']), 'w')
f.write(self.name)
f.close()
self.log("Default shelf is now '%s'\n" % self.name)
def log(self, msg):
sys.stderr.write(msg)
def delete(self, patch):
path = self.__path_from_user(patch)
rename(path, '%s~' % path)
def display(self, patch=None):
if patch is None:
path = self.last_patch()
if path is None:
raise CommandError("No patches on shelf.")
else:
path = self.__path_from_user(patch)
sys.stdout.write(open(path).read())
def list(self):
indexes = self.__list()
self.log("Patches on shelf '%s':" % self.name)
if len(indexes) == 0:
self.log(' None\n')
return
self.log('\n')
for index in indexes:
msg = self.get_patch_message(self.__path(index))
if msg is None:
msg = "No message saved with patch."
self.log(' %.2d: %s\n' % (index, msg))
def __path_from_user(self, patch_id):
try:
patch_index = int(patch_id)
except (TypeError, ValueError):
raise CommandError("Invalid patch name '%s'" % patch_id)
path = self.__path(patch_index)
if not os.path.exists(path):
raise CommandError("Patch '%s' doesn't exist on shelf %s!" % \
(patch_id, self.name))
return path
def __path(self, index):
return os.path.join(self.dir, '%.2d' % index)
def next_patch(self):
indexes = self.__list()
if len(indexes) == 0:
next = 0
else:
next = indexes[-1] + 1
return self.__path(next)
def __list(self):
patches = os.listdir(self.dir)
indexes = []
for f in patches:
if f.endswith('~'):
continue # ignore backup files
try:
indexes.append(int(f))
except ValueError:
self.log("Warning: Ignoring junk file '%s' on shelf.\n" % f)
indexes.sort()
return indexes
def last_patch(self):
indexes = self.__list()
if len(indexes) == 0:
return None
return self.__path(indexes[-1])
def get_patch_message(self, patch_path):
patch = open(patch_path, 'r').read()
if not patch.startswith(self.MESSAGE_PREFIX):
return None
return patch[len(self.MESSAGE_PREFIX):patch.index('\n')]
def unshelve(self, patch_source, patch_name=None, all=False, force=False,
no_color=False):
self._check_upgrade()
if no_color is False:
color = None
else:
color = False
if patch_name is None:
patch_path = self.last_patch()
else:
patch_path = self.__path_from_user(patch_name)
if patch_path is None:
raise CommandError("No patch found on shelf %s" % self.name)
patches = FilePatchSource(patch_path).readpatches()
if all:
to_unshelve = patches
to_remain = []
else:
hs = UnshelveHunkSelector(patches, color)
to_unshelve, to_remain = hs.select()
if len(to_unshelve) == 0:
raise CommandError('Nothing to unshelve')
message = self.get_patch_message(patch_path)
if message is None:
message = "No message saved with patch."
self.log('Unshelving from %s/%s: "%s"\n' % \
(self.name, os.path.basename(patch_path), message))
try:
self._run_patch(to_unshelve, dry_run=True)
self._run_patch(to_unshelve)
except PatchFailed:
try:
self._run_patch(to_unshelve, strip=1, dry_run=True)
self._run_patch(to_unshelve, strip=1)
except PatchFailed:
if force:
self.log('Warning: Unshelving failed, forcing as ' \
'requested. Shelf will not be modified.\n')
try:
self._run_patch(to_unshelve)
except PatchFailed:
pass
return
raise CommandError("Your shelved patch no " \
"longer applies cleanly to the working tree!")
# Backup the shelved patch
rename(patch_path, '%s~' % patch_path)
if len(to_remain) > 0:
f = open(patch_path, 'w')
for patch in to_remain:
f.write(str(patch))
f.close()
def shelve(self, patch_source, all=False, message=None, no_color=False):
self._check_upgrade()
if no_color is False:
color = None
else:
color = False
patches = patch_source.readpatches()
if all:
to_shelve = patches
else:
to_shelve = ShelveHunkSelector(patches, color).select()[0]
if len(to_shelve) == 0:
raise CommandError('Nothing to shelve')
if message is None:
timestamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
message = "Changes shelved on %s" % timestamp
patch_path = self.next_patch()
self.log('Shelving to %s/%s: "%s"\n' % \
(self.name, os.path.basename(patch_path), message))
f = open(patch_path, 'a')
assert '\n' not in message
f.write("%s%s\n" % (self.MESSAGE_PREFIX, message))
for patch in to_shelve:
f.write(str(patch))
f.flush()
os.fsync(f.fileno())
f.close()
try:
self._run_patch(to_shelve, reverse=True, dry_run=True)
self._run_patch(to_shelve, reverse=True)
except PatchFailed:
try:
self._run_patch(to_shelve, reverse=True, strip=1, dry_run=True)
self._run_patch(to_shelve, reverse=True, strip=1)
except PatchFailed:
raise CommandError("Failed removing shelved changes from the"
"working tree!")
def _run_patch(self, patches, strip=0, reverse=False, dry_run=False):
run_patch(self.base, patches, strip, reverse, dry_run)
def _check_upgrade(self):
if len(self._list_old_shelves()) > 0:
raise CommandError("Old format shelves found, either upgrade " \
"or remove them!")
def _list_old_shelves(self):
import glob
stem = os.path.join(self.base, '.bzr-shelf')
patches = glob.glob(stem)
patches.extend(glob.glob(stem + '-*[!~]'))
if len(patches) == 0:
return []
def patch_index(name):
if name == stem:
return 0
return int(name[len(stem) + 1:])
# patches might not be sorted in the right order
patch_ids = []
for patch in patches:
if patch == stem:
patch_ids.append(0)
else:
patch_ids.append(int(patch[len(stem) + 1:]))
patch_ids.sort()
patches = []
for id in patch_ids:
if id == 0:
patches.append(stem)
else:
patches.append('%s-%s' % (stem, id))
return patches
def upgrade(self):
patches = self._list_old_shelves()
if len(patches) == 0:
self.log('No old-style shelves found to upgrade.\n')
return
for patch in patches:
old_file = open(patch, 'r')
new_path = self.next_patch()
new_file = open(new_path, 'w')
new_file.write(old_file.read())
old_file.close()
new_file.close()
self.log('Copied %s to %s/%s\n' % (os.path.basename(patch),
self.name, os.path.basename(new_path)))
rename(patch, patch + '~')
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