platform_build_soong/starlark_import/Android.bp
Cole Faust c9508aac4c Load starlark files from soong
There are a number of instances where we are exporting information
from soong to bazel via soong_injection. This could be more bazel-centric
if the information was instead held in bzl files, and both bazel and
soong read it from there.

Add a starlark package that will run
//build/bazel/constants_exported_to_soong.bzl at initialization time,
and then results can be retreived with GetStarlarkValue.

Since changes to the starlark files mean that soong has to rerun,
add them as ninja deps.

Unfortunately, the starlark code has to be run at runtime rather than
pregenerating their results, because tests run from intellij wouldn't
go through any pregeneration steps. This means that starlark is run
multiple times during the build, once per test package and once per
primary builder invocation. (currently 3, could be reduced to 2 if we
made the symlink forest generation into its own standalone tool) The
starlark code we have so far in this cl is very fast, roughly half a
millisecond, so it's not a big deal for now, but something to keep an
eye on as we add more starlark constants.

Bug: 279095899
Test: go test
Change-Id: I1e7ca1df1d8d67333cbfc46e8396e229820e4476
2023-04-26 17:18:19 -07:00

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// Copyright 2023 Google Inc. 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.
package {
default_applicable_licenses: ["Android-Apache-2.0"],
}
bootstrap_go_package {
name: "soong-starlark",
pkgPath: "android/soong/starlark_import",
srcs: [
"starlark_import.go",
"unmarshal.go",
],
testSrcs: [
"starlark_import_test.go",
"unmarshal_test.go",
],
deps: [
"go-starlark-starlark",
"go-starlark-starlarkstruct",
"go-starlark-starlarkjson",
"go-starlark-starlarktest",
],
}