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// Copyright 2015 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.pkgcache;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.clock.BlazeClock;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.packages.ConstantRuleVisibility;
import com.google.devtools.build.lib.packages.util.PackageLoadingTestCase;
import com.google.devtools.build.lib.skyframe.TransitiveTargetKey;
import com.google.devtools.build.lib.skyframe.TransitiveTargetValue;
import com.google.devtools.build.lib.vfs.FileStatus;
import com.google.devtools.build.lib.vfs.FileSystem;
import com.google.devtools.build.lib.vfs.ModifiedFileSet;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.lib.vfs.Root;
import com.google.devtools.build.lib.vfs.inmemoryfs.InMemoryFileSystem;
import com.google.devtools.build.skyframe.EvaluationResult;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.io.IOException;
import javax.annotation.Nullable;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for recovering from IOExceptions thrown by the filesystem when reading BUILD files. Needs
* its own test class because it uses a custom filesystem.
*/
@RunWith(JUnit4.class)
public class IOExceptionsTest extends PackageLoadingTestCase {
private static final String FS_ROOT = "/fsg";
private static final Function<Path, String> NULL_FUNCTION = new Function<Path, String>() {
@Override
@Nullable
public String apply(Path path) {
return null;
}
};
private Function<Path, String> crashMessage = NULL_FUNCTION;
@Before
public final void initializeVisitor() throws Exception {
setUpSkyframe(ConstantRuleVisibility.PRIVATE, loadingMock.getDefaultsPackageContent());
}
private boolean visitTransitively(Label label) throws InterruptedException {
SkyKey key = TransitiveTargetKey.of(label);
EvaluationResult<SkyValue> result =
skyframeExecutor.prepareAndGet(ImmutableSet.of(key), /*numThreads=*/ 5, reporter);
TransitiveTargetValue value = (TransitiveTargetValue) result.get(key);
System.out.println(value);
boolean hasTransitiveError = (value == null) || value.getTransitiveRootCauses() != null;
return !result.hasError() && !hasTransitiveError;
}
protected void syncPackages() throws Exception {
skyframeExecutor.invalidateFilesUnderPathForTesting(
reporter, ModifiedFileSet.EVERYTHING_MODIFIED, Root.fromPath(rootDirectory));
}
@Override
protected FileSystem createFileSystem() {
return new InMemoryFileSystem(BlazeClock.instance(), PathFragment.create(FS_ROOT)) {
@Override
public FileStatus stat(Path path, boolean followSymlinks) throws IOException {
String crash = crashMessage.apply(path);
if (crash != null) {
throw new IOException(crash);
}
return super.stat(path, followSymlinks);
}
};
}
@Test
public void testBasicFailure() throws Exception {
reporter.removeHandler(failFastHandler); // expect errors
final Path buildPath = scratch.file("pkg/BUILD",
"sh_library(name = 'x')");
crashMessage = new Function<Path, String>() {
@Override
public String apply(Path path) {
if (buildPath.equals(path)) {
return "custom crash: " + buildPath;
}
return null;
}
};
assertThat(visitTransitively(Label.parseAbsolute("//pkg:x"))).isFalse();
scratch.overwriteFile("pkg/BUILD",
"# another comment to force reload",
"sh_library(name = 'x')");
crashMessage = NULL_FUNCTION;
syncPackages();
eventCollector.clear();
reporter.addHandler(failFastHandler);
assertThat(visitTransitively(Label.parseAbsolute("//pkg:x"))).isTrue();
assertNoEvents();
}
@Test
public void testNestedFailure() throws Exception {
reporter.removeHandler(failFastHandler); // expect errors
scratch.file("top/BUILD",
"sh_library(name = 'top', deps = ['//pkg:x'])");
final Path buildPath = scratch.file("pkg/BUILD",
"sh_library(name = 'x')");
crashMessage = new Function<Path, String>() {
@Override
public String apply(Path path) {
if (buildPath.equals(path)) {
return "custom crash: " + buildPath;
}
return null;
}
};
assertThat(visitTransitively(Label.parseAbsolute("//top:top"))).isFalse();
assertContainsEvent("no such package 'pkg'");
// The traditional label visitor does not propagate the original IOException message.
// assertContainsEvent("custom crash");
// This fails in Skyframe because the top node has already printed out the error but
// SkyframeLabelVisitor prints it out again.
// assertEquals(1, eventCollector.count());
scratch.overwriteFile("pkg/BUILD",
"# another comment to force reload",
"sh_library(name = 'x')");
crashMessage = NULL_FUNCTION;
syncPackages();
eventCollector.clear();
reporter.addHandler(failFastHandler);
assertThat(visitTransitively(Label.parseAbsolute("//top:top"))).isTrue();
assertNoEvents();
}
@Test
public void testOneLevelUpFailure() throws Exception {
reporter.removeHandler(failFastHandler); // expect errors
final Path buildPath = scratch.file("top/BUILD",
"sh_library(name = 'x')");
buildPath.getParentDirectory().getRelative("pkg").createDirectory();
crashMessage = new Function<Path, String>() {
@Override
public String apply(Path path) {
if (buildPath.equals(path)) {
return "custom crash: " + buildPath;
}
return null;
}
};
assertThat(visitTransitively(Label.parseAbsolute("//top/pkg:x"))).isFalse();
}
}
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