Add test-only and test-target fields to all_teams proto.

The `test-only` flag designates the module contains test-only, not
production code.  In order to generate code-coverage reports, we wanted
a way to filter out code (like java_library) that is test-only and
doesn't need to be in the report.
   The XXX_test modules will have test-only set automatically.
   For modules like `java_library`, users will be a able to set this in
   the Android.bp file.
   As a follow-up, I'll run some queries to find modules that are only
   reachable from top level test targets and mark them test-only as
   appropriate.

`test-only` is being added to the team.proto and will be written via the
`all_teams` target.

Currently, it is challenging to find "all top level test targets".
I'm adding another field to mark the target as a "top level test
target" if it is a XXX_test or XXX_test_host module.  The goal is to
mark all modules the user intended to run as a test, either with
tradefed or directly as a native test.

I added 'module-type/kind' to the proto so I can do some queries:

 gqui from  "flatten(out/soong/ownership/all_teams.pb, teams)" proto team.proto:AllTeams 'select teams.kind, count(*) where teams.top_level_target = true group by teams.kind'
+--------------+----------+
|  teams.kind  | count(*) |
+--------------+----------+
| android_test |     1379 |
| art_cc_test  |       56 |
| cc_benchmark |       68 |
| cc_fuzz      |      515 |
| cc_test      |     3519 |
| cc_test_host |        6 |
| java_fuzz    |        5 |
| java_test    |      773 |
+--------------+----------+

% gqui from  "flatten(~/aosp-main-with-phones/out/soong/ownership/all_teams.pb, teams)" proto team.proto:AllTeams 'select teams.kind ,count(*) where teams.test_only = true group by teams.kind'
+--------------------------+----------+
|        teams.kind        | count(*) |
+--------------------------+----------+
| android_test             |     1379 |
| android_test_helper_app  |     1678 |
| art_cc_test              |       56 |
| art_cc_test_library      |       13 |
| cc_benchmark             |       68 |
| cc_fuzz                  |      515 |
| cc_test                  |     3519 |
| cc_test_host             |        6 |
| cc_test_library          |      484 |
| java_library             |        2 |
| java_test                |      773 |
| java_test_helper_library |       29 |
+--------------------------+----------+

All modules can be seen here: https://docs.google.com/spreadsheets/d/1Zqbh7lDDdlI1xVmrN9fZ8bm8XD7EoORjjiPqbMvAKgQ/edit#gid=396553017

FOLLOW UP cls:
  *) Add more top level tests, like sh_test and python_test
  *) Add validation so that only modules currently marked test-only
     can depend on modules marked test-only
  *) Remove test_spec, code_metadata, TestModuleProviderKey: aosp/2928500

Test: go test ./java ./cc ./android
Test: m blueprint_tests
Test: m nothing --no-skip-soong-tests
    !!  android already failing on selects_test
Test: m all_teams  && gqui from  "flatten(out/soong/ownership/all_teams.pb, teams)"

Change-Id: Ib97dca60989aa9d7f000727c92af2e354926f072

1 files changed, 26 insertions, 0 deletions

diff --git a/android/shared_properties.go b/android/shared_properties.go
new file mode 100644
index 000000000..84d68fa14
--- /dev/null
+++ b/android/shared_properties.go
@@ -0,0 +1,26 @@
+// Copyright 2024 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 android
+
+// For storing user-supplied properties about source code on a module to be queried later.
+type SourceProperties struct {
+	// Indicates that the module and its source code are only used in tests, not
+	// production code. Used by coverage reports and potentially other tools.
+	Test_only *bool
+	// Used internally to write if this is a top level test target.
+	// i.e. something that can be run directly or through tradefed as a test.
+	// `java_library` would be false, `java_test` would be true.
+	Top_level_test_target bool `blueprint:"mutated"`
+}