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# 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.
"""Public entry point for py_import rule."""
load(":py_info.bzl", "PyInfo")
def _py_import_impl(ctx):
# See https://github.com/bazelbuild/bazel/blob/0.24.0/src/main/java/com/google/devtools/build/lib/bazel/rules/python/BazelPythonSemantics.java#L104 .
import_paths = [
"/".join([ctx.workspace_name, x.short_path])
for x in ctx.files.srcs
]
return [
DefaultInfo(
default_runfiles = ctx.runfiles(ctx.files.srcs, collect_default = True),
),
PyInfo(
transitive_sources = depset(transitive = [
dep[PyInfo].transitive_sources
for dep in ctx.attr.deps
]),
imports = depset(direct = import_paths, transitive = [
dep[PyInfo].imports
for dep in ctx.attr.deps
]),
),
]
py_import = rule(
doc = """This rule allows the use of Python packages as dependencies.
It imports the given `.egg` file(s), which might be checked in source files,
fetched externally as with `http_file`, or produced as outputs of other rules.
It may be used like a `py_library`, in the `deps` of other Python rules.
This is similar to [java_import](https://docs.bazel.build/versions/master/be/java.html#java_import).
""",
implementation = _py_import_impl,
attrs = {
"deps": attr.label_list(
doc = "The list of other libraries to be linked in to the " +
"binary target.",
providers = [PyInfo],
),
"srcs": attr.label_list(
doc = "The list of Python package files provided to Python targets " +
"that depend on this target. Note that currently only the .egg " +
"format is accepted. For .whl files, try the whl_library rule. " +
"We accept contributions to extend py_import to handle .whl.",
allow_files = [".egg"],
),
},
)
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