def _GetBaseListerFrontendPrototype(args, message=None):
"""Make Frontend suitable for BaseLister argument namespace.
Generated client-side filter is stored to args.filter. Generated server-side
filter is None. Client-side filter should be processed using
flags.RewriteFilter before use to take advantage of possible server-side
filtering.
Args:
args: The argument namespace of BaseLister.
message: The resource proto message.
Returns:
Frontend initialized with information from BaseLister argument namespace.
Server-side filter is None.
"""
frontend = _GetListCommandFrontendPrototype(args, message=message)
filter_args = []
default = args.filter # must preserve '' and None for default processing
if args.filter:
filter_args.append('('+args.filter+')')
if getattr(args, 'regexp', None):
filter_args.append(
'(name ~ "^{}$")'.format(resource_expr_rewrite.BackendBase()
.Quote(args.regexp)))
if getattr(args, 'names', None):
name_regexp = ' '.join([
resource_expr_rewrite.BackendBase().Quote(name) for name in args.names
if not name.startswith('https://')
])
selflink_regexp = ' '.join([
resource_expr_rewrite.BackendBase().Quote(name) for name in args.names
if name.startswith('https://')
])
if not selflink_regexp:
filter_args.append('(name =({}))'.format(name_regexp))
elif not name_regexp:
filter_args.append('(selfLink =({}))'.format(selflink_regexp))
else:
filter_args.append('((name =({})) OR (selfLink =({})))'.format(
name_regexp, selflink_regexp))
# Refine args.filter specification to reuse gcloud filtering logic
# for filtering based on instance names
args.filter = ' AND '.join(filter_args) or default
return _Frontend(None, frontend.max_results, frontend.scope_set)
def testResourceFilterBackendBaseRewrite(self):
"""Rewrite backend base tests -- all expressions should collapse to None."""
def T(expected, expression, exception=None):
self.Run(expected, expression, exception=exception, depth=2)
self.SetBackend(resource_expr_rewrite.BackendBase())
T((None, None), None)
T((None, None), '')
T(('a:3', None), 'a:3')
T(('s:xyz', None), 's:xyz')
T(('-a:3', None), '-a:3')
T(('NOT a:3', None), 'NOT a:3')
T(('x<3', None), 'x<3')
T(('x<=3', None), 'x<=3')
T(('x>=3', None), 'x>=3')
T(('x>3', None), 'x>3')
T(('x!=3', None), 'x!=3')
T(('-x!=3', None), '-x!=3')
T(('NOT x!=3', None), 'NOT x!=3')
T(('s=ing', None), 's=ing')
T(('s:S*ing', None), 's:S*ing')
T(('s:str*', None), 's:str*')
T(('s~[a-z]', None), 's~[a-z]')
T(('s!~^s.*g$', None), 's!~^s.*g$')
T(('s:"STRING"', None), 's:"STRING"')
T(('a.b.c:"c*g"', None), 'a.b.c:"c*g"')
T(('x:1 AND (y:2 OR z:3)', None), 'x:1 AND (y:2 OR z:3)')
T(('NOT x:1 AND ( y:2 OR z:3 )', None), 'NOT x:1 AND ( y:2 OR z:3 )')
T(('(x>0 OR y>0) AND z>0', None), '(x>0 OR y>0) AND z>0')
T(('( x:1 OR y:2 ) AND ( w:3 OR z:4 )', None),
'( x:1 OR y:2 ) AND ( w:3 OR z:4 )')
T(('( x:1 OR y:2 ) AND ( x:3 OR z:4 )', None),
'( x:1 OR y:2 ) AND ( x:3 OR z:4 )')
T(('a.b.c.test_transform():1', None), 'a.b.c.test_transform():1')
T(('a.b.c.test_transform():1 AND z:3', None),
'a.b.c.test_transform():1 AND z:3')
T(('a.b.c.unknown():1', None), 'a.b.c.unknown():1')
T(('a.b.c.unknown():1 AND z:3', None), 'a.b.c.unknown():1 AND z:3')
def SetUp(self):
self.backend = resource_expr_rewrite.BackendBase()