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Rename sets.bzl to old_sets.bzl (#70) 

* Rename sets.bzl as old_setz.bzl

* Reexport old_sets.bzl in sets.bzl

* Add old_sets.bzl to :sets
This commit is contained in:
bttk 2018-11-20 13:54:09 -08:00 committed by c-parsons
parent 9992d61921
commit 9566d63ba0
3 changed files with 165 additions and 143 deletions
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5
lib/BUILD
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@ -37,7 +37,10 @@ bzl_library(
bzl_library(
name = "sets",
srcs = ["sets.bzl"],
srcs = [
"old_sets.bzl",
"sets.bzl",
],
)
bzl_library(

157
lib/old_sets.bzl Normal file
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@ -0,0 +1,157 @@
# Copyright 2017 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Skylib module containing common set algorithms.
CAUTION: Operating on sets, particularly sets contained in providers, may
asymptotically slow down the analysis phase. While constructing large sets with
addition/union is fast (there is no linear-time copy involved), the
`difference` function and various comparison predicates involve linear-time
traversals.
For convenience, the functions in this module can take either sets or lists as
inputs; operations that take lists treat them as if they were sets (i.e.,
duplicate elements are ignored). Functions that return new sets always return
them as the `set` type, regardless of the types of the inputs.
"""
_depset_type = type(depset())
_list_type = type([])
def _precondition_only_sets_or_lists(*args):
"""Verifies that all arguments are either sets or lists.
The build will fail if any of the arguments is neither a set nor a list.
Args:
*args: A list of values that must be sets or lists.
"""
for a in args:
t = type(a)
if t not in (_depset_type, _list_type):
fail("Expected arguments to be depset or list, but found type %s: %r" %
(t, a))
def _depset_to_list(val):
"""Converts a depset to a list.
If the given value is a depset, will return the list representation of
the depset. Otherwise, will return the value itself.
Args:
val: The value to be optionally converted and returned.
"""
if type(val) == _depset_type:
return val.to_list()
else:
return val
def _is_equal(a, b):
"""Returns whether two sets are equal.
Args:
a: A depset or a list.
b: A depset or a list.
Returns:
True if `a` is equal to `b`, False otherwise.
"""
_precondition_only_sets_or_lists(a, b)
# Convert both values to a depset then back to a list to remove duplicates.
a = _depset_to_list(depset(a))
b = _depset_to_list(depset(b))
return sorted(a) == sorted(b)
def _is_subset(a, b):
"""Returns whether `a` is a subset of `b`.
Args:
a: A depset or a list.
b: A depset or a list.
Returns:
True if `a` is a subset of `b`, False otherwise.
"""
_precondition_only_sets_or_lists(a, b)
for e in _depset_to_list(a):
if e not in _depset_to_list(b):
return False
return True
def _disjoint(a, b):
"""Returns whether two sets are disjoint.
Two sets are disjoint if they have no elements in common.
Args:
a: A set or list.
b: A set or list.
Returns:
True if `a` and `b` are disjoint, False otherwise.
"""
_precondition_only_sets_or_lists(a, b)
for e in _depset_to_list(a):
if e in _depset_to_list(b):
return False
return True
def _intersection(a, b):
"""Returns the intersection of two sets.
Args:
a: A set or list.
b: A set or list.
Returns:
A set containing the elements that are in both `a` and `b`.
"""
_precondition_only_sets_or_lists(a, b)
return depset([e for e in _depset_to_list(a) if e in _depset_to_list(b)])
def _union(*args):
"""Returns the union of several sets.
Args:
*args: An arbitrary number of sets or lists.
Returns:
The set union of all sets or lists in `*args`.
"""
_precondition_only_sets_or_lists(*args)
args_deps = [depset(x) if type(x) == _list_type else x for x in args]
return depset(transitive = args_deps)
def _difference(a, b):
"""Returns the elements in `a` that are not in `b`.
Args:
a: A set or list.
b: A set or list.
Returns:
A set containing the elements that are in `a` but not in `b`.
"""
_precondition_only_sets_or_lists(a, b)
return depset([e for e in _depset_to_list(a) if e not in _depset_to_list(b)])
sets = struct(
difference = _difference,
disjoint = _disjoint,
intersection = _intersection,
is_equal = _is_equal,
is_subset = _is_subset,
union = _union,
)

146
lib/sets.bzl
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@ -1,4 +1,4 @@
# Copyright 2017 The Bazel Authors. All rights reserved.
# Copyright 2018 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
@ -12,146 +12,8 @@
# See the License for the specific language governing permissions and
# limitations under the License.
"""Skylib module containing common set algorithms.
"""Skylib module reexporting deprecated set algorithms."""
CAUTION: Operating on sets, particularly sets contained in providers, may
asymptotically slow down the analysis phase. While constructing large sets with
addition/union is fast (there is no linear-time copy involved), the
`difference` function and various comparison predicates involve linear-time
traversals.
load(":old_sets.bzl", _sets = "sets")
For convenience, the functions in this module can take either sets or lists as
inputs; operations that take lists treat them as if they were sets (i.e.,
duplicate elements are ignored). Functions that return new sets always return
them as the `set` type, regardless of the types of the inputs.
"""
_depset_type = type(depset())
_list_type = type([])
def _precondition_only_sets_or_lists(*args):
"""Verifies that all arguments are either sets or lists.
The build will fail if any of the arguments is neither a set nor a list.
Args:
*args: A list of values that must be sets or lists.
"""
for a in args:
t = type(a)
if t not in (_depset_type, _list_type):
fail("Expected arguments to be depset or list, but found type %s: %r" %
(t, a))
def _depset_to_list(val):
"""Converts a depset to a list.
If the given value is a depset, will return the list representation of
the depset. Otherwise, will return the value itself.
Args:
val: The value to be optionally converted and returned.
"""
if type(val) == _depset_type:
return val.to_list()
else:
return val
def _is_equal(a, b):
"""Returns whether two sets are equal.
Args:
a: A depset or a list.
b: A depset or a list.
Returns:
True if `a` is equal to `b`, False otherwise.
"""
_precondition_only_sets_or_lists(a, b)
# Convert both values to a depset then back to a list to remove duplicates.
a = _depset_to_list(depset(a))
b = _depset_to_list(depset(b))
return sorted(a) == sorted(b)
def _is_subset(a, b):
"""Returns whether `a` is a subset of `b`.
Args:
a: A depset or a list.
b: A depset or a list.
Returns:
True if `a` is a subset of `b`, False otherwise.
"""
_precondition_only_sets_or_lists(a, b)
for e in _depset_to_list(a):
if e not in _depset_to_list(b):
return False
return True
def _disjoint(a, b):
"""Returns whether two sets are disjoint.
Two sets are disjoint if they have no elements in common.
Args:
a: A set or list.
b: A set or list.
Returns:
True if `a` and `b` are disjoint, False otherwise.
"""
_precondition_only_sets_or_lists(a, b)
for e in _depset_to_list(a):
if e in _depset_to_list(b):
return False
return True
def _intersection(a, b):
"""Returns the intersection of two sets.
Args:
a: A set or list.
b: A set or list.
Returns:
A set containing the elements that are in both `a` and `b`.
"""
_precondition_only_sets_or_lists(a, b)
return depset([e for e in _depset_to_list(a) if e in _depset_to_list(b)])
def _union(*args):
"""Returns the union of several sets.
Args:
*args: An arbitrary number of sets or lists.
Returns:
The set union of all sets or lists in `*args`.
"""
_precondition_only_sets_or_lists(*args)
args_deps = [depset(x) if type(x) == _list_type else x for x in args]
return depset(transitive = args_deps)
def _difference(a, b):
"""Returns the elements in `a` that are not in `b`.
Args:
a: A set or list.
b: A set or list.
Returns:
A set containing the elements that are in `a` but not in `b`.
"""
_precondition_only_sets_or_lists(a, b)
return depset([e for e in _depset_to_list(a) if e not in _depset_to_list(b)])
sets = struct(
difference = _difference,
disjoint = _disjoint,
intersection = _intersection,
is_equal = _is_equal,
is_subset = _is_subset,
union = _union,
)
sets = _sets