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// Copyright 2018 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.runtime;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.pkgcache.PathPackageLocator;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.lib.vfs.Root;
import java.util.concurrent.atomic.AtomicReference;
import javax.annotation.Nullable;
class LocationPrinter {
private final boolean attemptToPrintRelativePaths;
@Nullable private final PathFragment workspacePathFragment;
private final AtomicReference<ImmutableList<Root>> packagePathRootsRef =
new AtomicReference<>(ImmutableList.of());
LocationPrinter(
boolean attemptToPrintRelativePaths,
@Nullable PathFragment workspacePathFragment) {
this.attemptToPrintRelativePaths = attemptToPrintRelativePaths;
this.workspacePathFragment = workspacePathFragment;
}
void packageLocatorCreated(PathPackageLocator packageLocator) {
packagePathRootsRef.set(packageLocator.getPathEntries());
}
String getLocationString(Location location) {
return attemptToPrintRelativePaths
? getRelativeLocationString(location, workspacePathFragment, packagePathRootsRef.get())
: location.toString();
}
@VisibleForTesting
static String getRelativeLocationString(
Location location,
@Nullable PathFragment workspacePathFragment,
ImmutableList<Root> packagePathRoots) {
PathFragment relativePathToUse = null;
PathFragment locationPathFragment = location.getPath();
if (locationPathFragment.isAbsolute()) {
if (workspacePathFragment != null && locationPathFragment.startsWith(workspacePathFragment)) {
relativePathToUse = locationPathFragment.relativeTo(workspacePathFragment);
} else {
for (Root packagePathRoot : packagePathRoots) {
if (packagePathRoot.contains(locationPathFragment)) {
relativePathToUse = packagePathRoot.relativize(locationPathFragment);
break;
}
}
}
}
return relativePathToUse == null ? location.print() : location.printWithPath(relativePathToUse);
}
}