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# Copyright 2021 The Bazel Go Rules 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.
load(
"//go/private:providers.bzl",
"GoArchive",
"GoStdLib",
)
load(
"@bazel_skylib//lib:paths.bzl",
"paths",
)
GoPkgInfo = provider()
DEPS_ATTRS = [
"deps",
"embed",
]
PROTO_COMPILER_ATTRS = [
"compiler",
"compilers",
"library",
]
def bazel_supports_canonical_label_literals():
return str(Label("//:bogus")).startswith("@@")
def is_file_external(f):
return f.owner.workspace_root != ""
def file_path(f):
prefix = "__BAZEL_WORKSPACE__"
if not f.is_source:
prefix = "__BAZEL_EXECROOT__"
elif is_file_external(f):
prefix = "__BAZEL_OUTPUT_BASE__"
return paths.join(prefix, f.path)
def _go_archive_to_pkg(archive):
return struct(
ID = str(archive.data.label),
PkgPath = archive.data.importpath,
ExportFile = file_path(archive.data.export_file),
GoFiles = [
file_path(src)
for src in archive.data.orig_srcs
if src.path.endswith(".go")
],
CompiledGoFiles = [
file_path(src)
for src in archive.data.srcs
if src.path.endswith(".go")
],
OtherFiles = [
file_path(src)
for src in archive.data.orig_srcs
if not src.path.endswith(".go")
],
Imports = {
pkg.data.importpath: str(pkg.data.label)
for pkg in archive.direct
},
)
def make_pkg_json(ctx, name, pkg_info):
pkg_json_file = ctx.actions.declare_file(name + ".pkg.json")
ctx.actions.write(pkg_json_file, content = pkg_info.to_json())
return pkg_json_file
def _go_pkg_info_aspect_impl(target, ctx):
# Fetch the stdlib JSON file from the inner most target
stdlib_json_file = None
transitive_json_files = []
transitive_export_files = []
transitive_compiled_go_files = []
for attr in DEPS_ATTRS + PROTO_COMPILER_ATTRS:
deps = getattr(ctx.rule.attr, attr, []) or []
# Some attrs are not iterable, ensure that deps is always iterable.
if type(deps) != type([]):
deps = [deps]
for dep in deps:
if GoPkgInfo in dep:
pkg_info = dep[GoPkgInfo]
transitive_json_files.append(pkg_info.pkg_json_files)
transitive_compiled_go_files.append(pkg_info.compiled_go_files)
transitive_export_files.append(pkg_info.export_files)
# Fetch the stdlib json from the first dependency
if not stdlib_json_file:
stdlib_json_file = pkg_info.stdlib_json_file
pkg_json_files = []
compiled_go_files = []
export_files = []
if GoArchive in target:
archive = target[GoArchive]
compiled_go_files.extend(archive.source.srcs)
export_files.append(archive.data.export_file)
pkg = _go_archive_to_pkg(archive)
pkg_json_files.append(make_pkg_json(ctx, archive.data.name, pkg))
if ctx.rule.kind == "go_test":
for dep_archive in archive.direct:
# find the archive containing the test sources
if archive.data.label == dep_archive.data.label:
pkg = _go_archive_to_pkg(dep_archive)
pkg_json_files.append(make_pkg_json(ctx, dep_archive.data.name, pkg))
compiled_go_files.extend(dep_archive.source.srcs)
export_files.append(dep_archive.data.export_file)
break
# If there was no stdlib json in any dependencies, fetch it from the
# current go_ node.
if not stdlib_json_file:
stdlib_json_file = ctx.attr._go_stdlib[GoStdLib]._list_json
pkg_info = GoPkgInfo(
stdlib_json_file = stdlib_json_file,
pkg_json_files = depset(
direct = pkg_json_files,
transitive = transitive_json_files,
),
compiled_go_files = depset(
direct = compiled_go_files,
transitive = transitive_compiled_go_files,
),
export_files = depset(
direct = export_files,
transitive = transitive_export_files,
),
)
return [
pkg_info,
OutputGroupInfo(
go_pkg_driver_json_file = pkg_info.pkg_json_files,
go_pkg_driver_srcs = pkg_info.compiled_go_files,
go_pkg_driver_export_file = pkg_info.export_files,
go_pkg_driver_stdlib_json_file = depset([pkg_info.stdlib_json_file] if pkg_info.stdlib_json_file else []),
),
]
go_pkg_info_aspect = aspect(
implementation = _go_pkg_info_aspect_impl,
attr_aspects = DEPS_ATTRS + PROTO_COMPILER_ATTRS,
attrs = {
"_go_stdlib": attr.label(
default = "//:stdlib",
),
},
)
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