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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.pkgcache;
import com.google.common.base.Function;
import com.google.common.base.Functions;
import com.google.devtools.build.lib.cmdline.LabelValidator;
import com.google.devtools.build.lib.cmdline.PackageIdentifier;
import com.google.devtools.build.lib.cmdline.ResolvedTargets;
import com.google.devtools.build.lib.cmdline.TargetParsingException;
import com.google.devtools.build.lib.cmdline.TargetPatternResolver;
import com.google.devtools.build.lib.packages.Package;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.vfs.PathFragment;
/**
* Common utility methods for target pattern resolution.
*/
public final class TargetPatternResolverUtil {
private static final Function<Target, Target> KEEP_ORIGINAL_TARGET = Functions.identity();
private TargetPatternResolverUtil() {
// Utility class.
}
public static String getParsingErrorMessage(String message, String originalPattern) {
if (originalPattern == null) {
return message;
} else {
return String.format("while parsing '%s': %s", originalPattern, message);
}
}
public static ResolvedTargets<Target> resolvePackageTargets(Package pkg, FilteringPolicy policy) {
return resolvePackageTargets(pkg, policy, KEEP_ORIGINAL_TARGET);
}
public static ResolvedTargets<Target> resolvePackageTargets(
Package pkg, FilteringPolicy policy, Function<Target, Target> convertTarget) {
ResolvedTargets.Builder<Target> builder = ResolvedTargets.builder();
for (Target target : pkg.getTargets().values()) {
if (policy.shouldRetain(target, false)) {
builder.add(convertTarget.apply(target));
}
}
return builder.build();
}
public static void validatePatternPackage(
String originalPattern, PathFragment packageNameFragment, TargetPatternResolver<?> resolver)
throws TargetParsingException, InterruptedException {
String packageName = packageNameFragment.toString();
// It's possible for this check to pass, but for
// Label.validatePackageNameFull to report an error because the
// package name is illegal. That's a little weird, but we can live with
// that for now--see test case: testBadPackageNameButGoodEnoughForALabel.
if (LabelValidator.validatePackageName(packageName) != null) {
throw new TargetParsingException("'" + packageName + "' is not a valid package name");
}
if (!resolver.isPackage(PackageIdentifier.createInMainRepo(packageName))) {
throw new TargetParsingException(
TargetPatternResolverUtil.getParsingErrorMessage(
"no such package '" + packageName + "': BUILD file not found on package path",
originalPattern));
}
}
public static PathFragment getPathFragment(String pathPrefix) throws TargetParsingException {
PathFragment directory = PathFragment.create(pathPrefix);
if (directory.containsUplevelReferences()) {
throw new TargetParsingException("up-level references are not permitted: '"
+ directory.getPathString() + "'");
}
if (!pathPrefix.isEmpty() && (LabelValidator.validatePackageName(pathPrefix) != null)) {
throw new TargetParsingException("'" + pathPrefix + "' is not a valid package name");
}
return directory;
}
}
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