def revert_actions(self, arg):
"""
Calculate the actions necessary to revert to a given state, the
argument may be one of:
* complete set of eggs, i.e. a set of egg file names
* revision number (negative numbers allowed)
"""
h = History(self.top_prefix)
h.update()
if isinstance(arg, set):
state = arg
else:
try:
rev = int(arg)
except (TypeError, ValueError):
raise EnpkgError("Invalid argument: integer expected, "
"got: {0!r}".format(arg))
try:
state = h.get_state(rev)
except IndexError:
raise EnpkgError("Error: no such revision: %r" % arg)
curr = h.get_state()
if state == curr:
return []
res = []
for egg in curr - state:
if egg.startswith('enstaller'):
continue
res.append(('remove', egg))
for egg in state - curr:
if egg.startswith('enstaller'):
continue
if not isfile(join(self._downloader.cache_directory, egg)):
eggname, version = egg_name_to_name_version(egg)
try:
self._remote_repository.find_package(eggname, version)
res.append(('fetch_0', egg))
except NoSuchPackage:
raise EnpkgError("cannot revert -- missing %r" % egg)
res.append(('install', egg))
return res
def setUp(self):
self.history = History('<dummy prefix>')
self.history._log_path = PATH
self.package_sets = [
set([
'appinst-2.1.0-1.egg', 'basemap-1.0.1-1.egg',
'biopython-1.57-2.egg'
]),
set([
'basemap-1.0.2-1.egg', 'biopython-1.57-2.egg',
'numpy-1.6.1-2.egg'
]),
set([
'basemap-1.0.2-1.egg', 'biopython-1.57-2.egg',
'numpy-1.7.0-1.egg'
])
]
# Write the history file
self.history._write_egg_names(self.package_sets[0])
for i, state in enumerate(self.package_sets[:-1]):
self.history._write_changes(state, self.package_sets[i + 1])
def print_history(prefix):
h = History(prefix)
h.update()
h.print_log()
def get_history(self):
"""
return a history (h) object with this Enpkg instance prefix.
"""
# FIXME: only used by canopy
return History(self.top_prefix)
def __iter__(self):
with History(self._top_prefix):
for action in self._actions:
logger.info('\t' + str(action))
yield self._action_factory(action)
