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// Copyright 2014 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.testutil;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.analysis.BlazeDirectories;
import com.google.devtools.build.lib.analysis.config.BinTools;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.cmdline.LabelSyntaxException;
import com.google.devtools.build.lib.util.Preconditions;
import com.google.devtools.build.lib.vfs.FileSystemUtils;
import com.google.devtools.build.lib.vfs.Path;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* Some static utility functions for testing Blaze code. In contrast to {@link TestUtils}, these
* functions are Blaze-specific.
*/
public class BlazeTestUtils {
private BlazeTestUtils() {}
/**
* Populates the _embedded_binaries/ directory, containing all binaries/libraries, by symlinking
* directories#getEmbeddedBinariesRoot() to the test's runfiles tree.
*/
public static BinTools getIntegrationBinTools(BlazeDirectories directories) throws IOException {
Path embeddedDir = directories.getEmbeddedBinariesRoot();
FileSystemUtils.createDirectoryAndParents(embeddedDir);
Path runfiles = directories.getFileSystem().getPath(BlazeTestUtils.runfilesDir());
// Copy over everything in embedded_scripts.
Collection<Path> files = new ArrayList<>();
for (String embeddedScriptPath : TestConstants.EMBEDDED_SCRIPTS_PATHS) {
Path embeddedScripts = runfiles.getRelative(embeddedScriptPath);
if (embeddedScripts.exists()) {
files.addAll(embeddedScripts.getDirectoryEntries());
} else {
System.err.println("test does not have " + embeddedScripts);
}
}
for (Path fromFile : files) {
try {
embeddedDir.getChild(fromFile.getBaseName()).createSymbolicLink(fromFile);
} catch (IOException e) {
System.err.println("Could not symlink: " + e.getMessage());
}
}
return BinTools.forIntegrationTesting(
directories, embeddedDir.toString(), TestConstants.EMBEDDED_TOOLS);
}
/**
* Writes a FilesetRule to a String array.
*
* @param name the name of the rule.
* @param out the output directory.
* @param entries The FilesetEntry entries.
* @return the String array of the rule. One String for each line.
*/
public static String[] createFilesetRule(String name, String out, String... entries) {
return new String[] {
String.format("Fileset(name = '%s', out = '%s',", name, out),
" entries = [" + Joiner.on(", ").join(entries) + "])"
};
}
public static File undeclaredOutputDir() {
String dir = System.getenv("TEST_UNDECLARED_OUTPUTS_DIR");
if (dir != null) {
return new File(dir);
}
return TestUtils.tmpDirFile();
}
public static String runfilesDir() {
String runfilesDirStr = TestUtils.getUserValue("TEST_SRCDIR");
Preconditions.checkState(runfilesDirStr != null && runfilesDirStr.length() > 0,
"TEST_SRCDIR unset or empty");
return new File(runfilesDirStr).getAbsolutePath();
}
/** Creates an empty file, along with all its parent directories. */
public static void makeEmptyFile(Path path) throws IOException {
FileSystemUtils.createDirectoryAndParents(path.getParentDirectory());
FileSystemUtils.createEmptyFile(path);
}
/**
* Changes the mtime of the file "path", which must exist. No guarantee is
* made about the new mtime except that it is different from the previous one.
*
* @throws IOException if the mtime could not be read or set.
*/
public static void changeModtime(Path path)
throws IOException {
long prevMtime = path.getLastModifiedTime();
long newMtime = prevMtime;
do {
newMtime += 1000;
path.setLastModifiedTime(newMtime);
} while (path.getLastModifiedTime() == prevMtime);
}
public static Label convertLabel(Label label) {
try {
return label.getPackageIdentifier().getRepository().isDefault()
? Label.create(label.getPackageIdentifier().makeAbsolute(), label.getName())
: label;
} catch (LabelSyntaxException e) {
throw new IllegalStateException(e);
}
}
public static List<Label> convertLabels(Iterable<Label> labels) {
return ImmutableList.copyOf(Iterables.transform(labels, new Function<Label, Label>() {
@Override
public Label apply(Label label) {
return convertLabel(label);
}
}));
}
}
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