blob: 78f62be1aa58020b5032ebd0021c9356b066b037 [file] [log] [blame]
# Copyright 2023 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.
"""Text manipulation utilities useful for repository rule writing."""
def _indent(text, indent = " " * 4):
if "\n" not in text:
return indent + text
return "\n".join([indent + line for line in text.splitlines()])
def _render_alias(name, actual, *, visibility = None):
args = [
"name = \"{}\",".format(name),
"actual = {},".format(actual),
]
if visibility:
args.append("visibility = {},".format(render.list(visibility)))
return "\n".join([
"alias(",
] + [_indent(arg) for arg in args] + [
")",
])
def _render_dict(d, *, value_repr = repr):
return "\n".join([
"{",
_indent("\n".join([
"{}: {},".format(repr(k), value_repr(v))
for k, v in d.items()
])),
"}",
])
def _render_select(selects, *, no_match_error = None, value_repr = repr):
dict_str = _render_dict(selects, value_repr = value_repr) + ","
if no_match_error:
args = "\n".join([
"",
_indent(dict_str),
_indent("no_match_error = {},".format(no_match_error)),
"",
])
else:
args = "\n".join([
"",
_indent(dict_str),
"",
])
return "select({})".format(args)
def _render_list(items):
if not items:
return "[]"
if len(items) == 1:
return "[{}]".format(repr(items[0]))
return "\n".join([
"[",
_indent("\n".join([
"{},".format(repr(item))
for item in items
])),
"]",
])
render = struct(
alias = _render_alias,
dict = _render_dict,
indent = _indent,
list = _render_list,
select = _render_select,
)