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Expose ProtoToolchainInfo to Starlark
Progress on https://docs.google.com/document/d/1go3UMwm2nM8JHhI3MZrtyoFEy3BYg5omGqQmOwcjmNE/edit Closes bazelbuild#13732. PiperOrigin-RevId: 387087817
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84 changes: 84 additions & 0 deletions
84
...main/java/com/google/devtools/build/lib/starlarkbuildapi/proto/ProtoToolchainInfoApi.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| // Copyright 2021 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. | ||
|
|
||
| package com.google.devtools.build.lib.starlarkbuildapi.proto; | ||
|
|
||
| import com.google.common.collect.ImmutableList; | ||
| import com.google.devtools.build.docgen.annot.DocCategory; | ||
| import com.google.devtools.build.docgen.annot.StarlarkConstructor; | ||
| import com.google.devtools.build.lib.starlarkbuildapi.FileApi; | ||
| import com.google.devtools.build.lib.starlarkbuildapi.FilesToRunProviderApi; | ||
| import com.google.devtools.build.lib.starlarkbuildapi.core.ProviderApi; | ||
| import com.google.devtools.build.lib.starlarkbuildapi.core.StructApi; | ||
| import net.starlark.java.annot.Param; | ||
| import net.starlark.java.annot.ParamType; | ||
| import net.starlark.java.annot.StarlarkBuiltin; | ||
| import net.starlark.java.annot.StarlarkMethod; | ||
| import net.starlark.java.eval.EvalException; | ||
| import net.starlark.java.eval.Sequence; | ||
|
|
||
| /** Information about the {@code proto} toolchain. */ | ||
| @StarlarkBuiltin( | ||
| name = ProtoToolchainInfoApi.NAME, | ||
| category = DocCategory.PROVIDER, | ||
| doc = "Information about the `proto` toolchain.") | ||
| public interface ProtoToolchainInfoApi< | ||
| FilesToRunProviderApiT extends FilesToRunProviderApi<? extends FileApi>> | ||
| extends StructApi { | ||
| /** The name of the provider in Starlark. */ | ||
| String NAME = "ProtoToolchainInfo"; | ||
|
|
||
| @StarlarkMethod(name = "compiler", doc = "The proto compiler to use.", structField = true) | ||
| FilesToRunProviderApiT getCompiler(); | ||
|
|
||
| @StarlarkMethod( | ||
| name = "compiler_options", | ||
| doc = "Additional options to pass to `protoc`.", | ||
| structField = true) | ||
| ImmutableList<String> getCompilerOptions(); | ||
|
|
||
| /** The provider implementing this can construct {@code ProtoToolchainInfo} objects. */ | ||
| @StarlarkBuiltin( | ||
| name = "Provider", | ||
| doc = "", | ||
| // This object is documented via the ProtoToolchainInfo documentation and the docuemntation of | ||
| // its | ||
| // callable function. | ||
| documented = false) | ||
| interface Provider<FilesToRunProviderApiT extends FilesToRunProviderApi<? extends FileApi>> | ||
| extends ProviderApi { | ||
| @StarlarkMethod( | ||
| name = NAME, | ||
| doc = "The `ProtoToolchainInfo` constructor.", | ||
| parameters = { | ||
| @Param( | ||
| name = "compiler", | ||
| doc = "The proto compiler.", | ||
| positional = false, | ||
| named = true, | ||
| allowedTypes = {@ParamType(type = FilesToRunProviderApi.class)}), | ||
| @Param( | ||
| name = "compiler_options", | ||
| doc = "The proto compiler.", | ||
| positional = false, | ||
| named = true, | ||
| defaultValue = "[]", | ||
| allowedTypes = {@ParamType(type = Sequence.class, generic1 = String.class)}) | ||
| }, | ||
| selfCall = true) | ||
| @StarlarkConstructor | ||
| ProtoToolchainInfoApi<FilesToRunProviderApiT> create( | ||
| FilesToRunProviderApiT protoc, Sequence<?> protocOptions) throws EvalException; | ||
| } | ||
| } |
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88 changes: 88 additions & 0 deletions
88
src/test/java/com/google/devtools/build/lib/rules/proto/ProtoToolchainInfoTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| // Copyright 2021 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. | ||
|
|
||
| package com.google.devtools.build.lib.rules.proto; | ||
|
|
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| import static com.google.common.truth.Truth.assertThat; | ||
|
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| import com.google.devtools.build.lib.analysis.ConfiguredTarget; | ||
| import com.google.devtools.build.lib.analysis.FilesToRunProvider; | ||
| import com.google.devtools.build.lib.analysis.util.BuildViewTestCase; | ||
| import org.junit.Before; | ||
| import org.junit.Test; | ||
| import org.junit.runner.RunWith; | ||
| import org.junit.runners.JUnit4; | ||
|
|
||
| /** Unit tests for {@code ProtoToolchainInfo}. */ | ||
| @RunWith(JUnit4.class) | ||
| public class ProtoToolchainInfoTest extends BuildViewTestCase { | ||
| @Before | ||
| public void setUp() throws Exception { | ||
| scratch.file( | ||
| "proto/toolchain.bzl", | ||
| "def _impl(ctx):", | ||
| " return ProtoToolchainInfo(", | ||
| " compiler = ctx.attr.compiler.files_to_run,", | ||
| " compiler_options = ctx.attr.compiler_options,", | ||
| " )", | ||
| "proto_toolchain = rule(", | ||
| " implementation = _impl,", | ||
| " attrs = {", | ||
| " 'compiler': attr.label(executable=True, cfg='exec'),", | ||
| " 'compiler_options': attr.string_list(),", | ||
| " },", | ||
| ")"); | ||
| scratch.file( | ||
| "proto/BUILD", | ||
| "load(':toolchain.bzl', 'proto_toolchain')", | ||
| "cc_binary(", | ||
| " name = 'compiler',", | ||
| ")"); | ||
| } | ||
|
|
||
| @Test | ||
| public void testStarlarkApi() throws Exception { | ||
| scratch.file( | ||
| "foo/BUILD", | ||
| "load('//proto:toolchain.bzl', 'proto_toolchain')", | ||
| "proto_toolchain(", | ||
| " name = 'toolchain',", | ||
| " compiler = '//proto:compiler',", | ||
| ")"); | ||
|
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| ConfiguredTarget target = getConfiguredTarget("//foo:toolchain"); | ||
| ProtoToolchainInfo protoToolchain = target.get(ProtoToolchainInfo.PROVIDER); | ||
| FilesToRunProvider compiler = protoToolchain.getCompiler(); | ||
| assertThat(compiler.getExecutable().getOwner().toString()).isEqualTo("//proto:compiler"); | ||
| assertThat(protoToolchain.getCompilerOptions()).isEmpty(); | ||
| } | ||
|
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| @Test | ||
| public void testStarlarkApi_withCompilerOptions() throws Exception { | ||
| scratch.file( | ||
| "foo/BUILD", | ||
| "load('//proto:toolchain.bzl', 'proto_toolchain')", | ||
| "proto_toolchain(", | ||
| " name = 'toolchain',", | ||
| " compiler = '//proto:compiler',", | ||
| " compiler_options = ['--foo', '--bar'],", | ||
| ")"); | ||
|
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| ConfiguredTarget target = getConfiguredTarget("//foo:toolchain"); | ||
| ProtoToolchainInfo protoToolchain = target.get(ProtoToolchainInfo.PROVIDER); | ||
| FilesToRunProvider compiler = protoToolchain.getCompiler(); | ||
| assertThat(compiler.getExecutable().getOwner().toString()).isEqualTo("//proto:compiler"); | ||
| assertThat(protoToolchain.getCompilerOptions()).containsExactly("--foo", "--bar").inOrder(); | ||
| } | ||
| } |