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// Copyright 2020 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.analysis;
import static com.google.common.truth.Truth.assertThat;
import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.testutil.Scratch;
import java.util.Map;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Test of common logic between Starlark-defined transitions. Rule-transition- or
* attr-transition-specific logic should be tested in {@link StarlarkRuleTransitionProviderTest} and
* {@link StarlarkAttrTransitionProviderTest}.
*/
@RunWith(JUnit4.class)
public class StarlarkTransitionTest extends BuildViewTestCase {
static void writeAllowlistFile(Scratch scratch) throws Exception {
scratch.overwriteFile(
"tools/allowlists/function_transition_allowlist/BUILD",
"package_group(",
" name = 'function_transition_allowlist',",
" packages = [",
" '//test/...',",
" ],",
")");
}
@Test
public void testDupeSettingsInInputsThrowsError() throws Exception {
scratch.file(
"test/defs.bzl",
"def _setting_impl(ctx):",
" return []",
"string_flag = rule(",
" implementation = _setting_impl,",
" build_setting = config.string(flag=True),",
")",
"def _transition_impl(settings, attr):",
" return {'//test:formation': 'mesa'}",
"formation_transition = transition(",
" implementation = _transition_impl,",
" inputs = ['@//test:formation', '//test:formation'],", // duplicates here
" outputs = ['//test:formation'],",
")",
"def _impl(ctx):",
" return []",
"state = rule(",
" implementation = _impl,",
" cfg = formation_transition,",
" attrs = {",
" '_allowlist_function_transition': attr.label(",
" default = '//tools/allowlists/function_transition_allowlist',",
" ),",
" })");
scratch.file(
"test/BUILD",
"load('//test:defs.bzl', 'state', 'string_flag')",
"state(name = 'arizona')",
"string_flag(name = 'formation', build_setting_default = 'canyon')");
reporter.removeHandler(failFastHandler);
getConfiguredTarget("//test:arizona");
assertContainsEvent(
"Transition declares duplicate build setting '@@//test:formation' in INPUTS");
}
@Test
public void testDupeSettingsInOutputsThrowsError() throws Exception {
scratch.file(
"test/defs.bzl",
"def _setting_impl(ctx):",
" return []",
"string_flag = rule(",
" implementation = _setting_impl,",
" build_setting = config.string(flag=True),",
")",
"def _transition_impl(settings, attr):",
" return {'//test:formation': 'mesa'}",
"formation_transition = transition(",
" implementation = _transition_impl,",
" inputs = ['//test:formation'],",
" outputs = ['@//test:formation', '//test:formation'],", // duplicates here
")",
"def _impl(ctx):",
" return []",
"state = rule(",
" implementation = _impl,",
" cfg = formation_transition,",
" attrs = {",
" '_allowlist_function_transition': attr.label(",
" default = '//tools/allowlists/function_transition_allowlist',",
" ),",
" })");
scratch.file(
"test/BUILD",
"load('//test:defs.bzl', 'state', 'string_flag')",
"state(name = 'arizona')",
"string_flag(name = 'formation', build_setting_default = 'canyon')");
reporter.removeHandler(failFastHandler);
getConfiguredTarget("//test:arizona");
assertContainsEvent(
"Transition declares duplicate build setting '@@//test:formation' in OUTPUTS");
}
@Test
public void testDifferentFormsOfFlagInInputsAndOutputs() throws Exception {
writeAllowlistFile(scratch);
scratch.file(
"test/defs.bzl",
"def _setting_impl(ctx):",
" return []",
"string_flag = rule(",
" implementation = _setting_impl,",
" build_setting = config.string(flag=True),",
")",
"def _transition_impl(settings, attr):",
" formation = settings['@//test:formation']",
" if formation.endswith('-transitioned'):",
" new_value = formation",
" else:",
" new_value = formation + '-transitioned'",
" return {",
" '//test:formation': new_value,",
" }",
"formation_transition = transition(",
" implementation = _transition_impl,",
" inputs = ['@//test:formation'],",
" outputs = ['//test:formation'],",
")",
"def _impl(ctx):",
" return []",
"state = rule(",
" implementation = _impl,",
" cfg = formation_transition,",
" attrs = {",
" '_allowlist_function_transition': attr.label(",
" default = '//tools/allowlists/function_transition_allowlist',",
" ),",
" })");
scratch.file(
"test/BUILD",
"load('//test:defs.bzl', 'state', 'string_flag')",
"state(name = 'arizona')",
"string_flag(name = 'formation', build_setting_default = 'canyon')");
Map<Label, Object> starlarkOptions =
getConfiguration(getConfiguredTarget("//test:arizona")).getOptions().getStarlarkOptions();
assertThat(starlarkOptions).hasSize(1);
assertThat(starlarkOptions.get(Label.parseCanonicalUnchecked("//test:formation")))
.isEqualTo("canyon-transitioned");
}
private void writeDefBzlWithStringFlagAndEaterRule() throws Exception {
scratch.file(
"test/defs.bzl",
"def _setting_impl(ctx):",
" return []",
"string_flag = rule(",
" implementation = _setting_impl,",
" build_setting = config.string(flag=True),",
")",
"def _transition_impl(settings, attr):",
" if settings['@//options:fruit'].endswith('-eaten'):",
" return {'//options:fruit': settings['@//options:fruit']}",
" return {'//options:fruit': settings['@//options:fruit'] + '-eaten'}",
"eating_transition = transition(",
" implementation = _transition_impl,",
" inputs = ['@//options:fruit'],",
" outputs = ['//options:fruit'],",
")",
"def _impl(ctx):",
" return []",
"eater = rule(",
" implementation = _impl,",
" cfg = eating_transition,",
" attrs = {",
" '_allowlist_function_transition': attr.label(",
" default = '//tools/allowlists/function_transition_allowlist',",
" ),",
" })");
}
@Test
public void testDifferentDefaultsRerunsTransitionTest() throws Exception {
writeAllowlistFile(scratch);
writeDefBzlWithStringFlagAndEaterRule();
scratch.file(
"options/BUILD",
"load('//test:defs.bzl', 'string_flag')",
"string_flag(name = 'fruit', build_setting_default = 'apple')");
scratch.file("test/BUILD", "load('//test:defs.bzl', 'eater')", "eater(name = 'foo')");
assertThat(
getConfiguration(getConfiguredTarget("//test:foo"))
.getOptions()
.getStarlarkOptions()
.get(Label.parseCanonicalUnchecked("//options:fruit")))
.isEqualTo("apple-eaten");
scratch.overwriteFile(
"options/BUILD",
"load('//test:defs.bzl', 'string_flag')",
"string_flag(name = 'fruit', build_setting_default = 'orange')");
invalidatePackages();
assertThat(
getConfiguration(getConfiguredTarget("//test:foo"))
.getOptions()
.getStarlarkOptions()
.get(Label.parseCanonicalUnchecked("//options:fruit")))
.isEqualTo("orange-eaten");
}
@Test
public void testAliasChangeRerunsTransitionTest() throws Exception {
writeAllowlistFile(scratch);
writeDefBzlWithStringFlagAndEaterRule();
scratch.file(
"options/BUILD",
"load('//test:defs.bzl', 'string_flag')",
"string_flag(name = 'usually_apple', build_setting_default = 'apple')",
"string_flag(name = 'usually_orange', build_setting_default = 'orange')",
"alias(name = 'fruit', actual = ':usually_apple')");
scratch.file("test/BUILD", "load('//test:defs.bzl', 'eater')", "eater(name = 'foo')");
assertThat(
getConfiguration(getConfiguredTarget("//test:foo")).getOptions().getStarlarkOptions())
.containsExactly(Label.parseCanonicalUnchecked("//options:usually_apple"), "apple-eaten");
scratch.overwriteFile(
"options/BUILD",
"load('//test:defs.bzl', 'string_flag')",
"string_flag(name = 'usually_apple', build_setting_default = 'apple')",
"string_flag(name = 'usually_orange', build_setting_default = 'orange')",
"alias(name = 'fruit', actual = ':usually_orange')");
invalidatePackages();
assertThat(
getConfiguration(getConfiguredTarget("//test:foo")).getOptions().getStarlarkOptions())
.containsExactly(Label.parseCanonicalUnchecked("//options:usually_orange"), "orange-eaten");
}
}