def _get_state(self, h, rev_in):
assert isinstance(rev_in, (str, unicode, int, long))
try:
rev = int(rev_in)
except ValueError:
# we have a "date string"
from parse_dt import parse
rev = parse(rev_in)
if rev is None:
raise EnpkgError("Error: could not parse: %r" % rev_in)
try:
return h.get_state(rev)
except IndexError:
raise EnpkgError("Error: no such revision: %r" % rev)
def revert(enst, rev_in, quiet=False):
history = History(enst.prefixes[0])
try:
rev = int(rev_in)
except ValueError:
# we have a "date string"
from parse_dt import parse
rev = parse(rev_in)
if rev is None:
sys.exit("Error: could not parse: %r" % rev_in)
print "reverting to: %r" % rev
try:
state = history.get_state(rev)
except IndexError:
sys.exit("Error: no such revision: %r" % rev)
curr = set(egginst.get_installed())
if state == curr:
print "Nothing to revert"
return
# remove packages
for fn in curr - state:
enst.remove_egg(fn)
# install packages (fetch from server if necessary)
to_install = []
need_fetch = []
for fn in state - curr:
to_install.append(fn)
if not isfile(join(enst.egg_dir, fn)):
need_fetch.append(fn)
if need_fetch:
for fn in need_fetch:
dist = enst.chain.get_dist(filename_as_req(fn))
if dist:
enst.chain.fetch_dist(dist, enst.egg_dir,
dry_run=enst.dry_run)
for fn in to_install:
egg_path = join(enst.egg_dir, fn)
if isfile(egg_path):
ei = egginst.EggInst(egg_path)
ei.install()
history.update()
