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# Copyright 2024 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.
"""
EXPERIMENTAL: This is experimental and may be removed without notice
A module extension for working with uv.
"""
load(":uv_repositories.bzl", "uv_repositories")
_DOC = """\
A module extension for working with uv.
"""
uv_toolchain = tag_class(
doc = "Configure uv toolchain for lock file generation.",
attrs = {
"uv_version": attr.string(doc = "Explicit version of uv.", mandatory = True),
},
)
def _uv_toolchain_extension(module_ctx):
for mod in module_ctx.modules:
for toolchain in mod.tags.toolchain:
if not mod.is_root:
fail(
"Only the root module may configure the uv toolchain.",
"This prevents conflicting registrations with any other modules.",
"NOTE: We may wish to enforce a policy where toolchain configuration is only allowed in the root module, or in rules_python. See https://github.com/bazelbuild/bazel/discussions/22024",
)
uv_repositories(
uv_version = toolchain.uv_version,
register_toolchains = False,
)
uv = module_extension(
doc = _DOC,
implementation = _uv_toolchain_extension,
tag_classes = {"toolchain": uv_toolchain},
)