go/private/rules/source.bzl

# 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.

# In Go, imports are always fully qualified with a URL,
# eg. github.com/user/project. Hence, a label //foo:bar from within a
# Bazel workspace must be referred to as
# "github.com/user/project/foo/bar". To make this work, each rule must
# know the repository's URL. This is achieved, by having all go rules
# depend on a globally unique target that has a "go_prefix" transitive
# info provider.

load("@io_bazel_rules_go//go/private:context.bzl",
    "go_context",
)
load("@io_bazel_rules_go//go/private:providers.bzl",
    "GoLibrary",
)

def _go_source_impl(ctx):
  """Implements the go_source() rule."""
  go = go_context(ctx)
  library = go.new_library(go)
  source = go.library_to_source(go, ctx.attr, library, ctx.coverage_instrumented())
  return [library, source]

go_source = rule(
    _go_source_impl,
    attrs = {
        "data": attr.label_list(allow_files = True, cfg = "data"),
        "srcs": attr.label_list(allow_files = True),
        "deps": attr.label_list(providers = [GoLibrary]),
        "embed": attr.label_list(providers = [GoLibrary]),
        "gc_goopts": attr.string_list(),
        "_go_context_data": attr.label(default=Label("@io_bazel_rules_go//:go_context_data")),
    },
    toolchains = ["@io_bazel_rules_go//go:toolchain"],
)
"""See go/core.rst#go_source for full documentation."""