| // 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.buildtool; |
| |
| import com.google.devtools.build.lib.vfs.PathFragment; |
| import java.util.Map; |
| |
| /** |
| * Uses information about the convenience symlinks to print shorter paths for output artifacts. |
| * |
| * <p>Instances cannot be reused across builds - they must be used for the build associated with the |
| * provided symlinks. If instances are reused the pretty path may be incorrect, for example if the |
| * symlinks end up pointing somewhere new. |
| */ |
| public final class PathPrettyPrinter { |
| private static final String NO_CREATE_SYMLINKS_PREFIX = "/"; |
| |
| private final String symlinkPrefix; |
| private final Map<PathFragment, PathFragment> resolvedSymlinks; |
| |
| public PathPrettyPrinter( |
| String symlinkPrefix, Map<PathFragment, PathFragment> convenienceSymlinks) { |
| this.symlinkPrefix = symlinkPrefix; |
| this.resolvedSymlinks = convenienceSymlinks; |
| } |
| |
| /** |
| * Returns a convenient path to the specified file, relativizing it and using convenience symlinks |
| * if possible. Otherwise, return the original path. |
| */ |
| public PathFragment getPrettyPath(PathFragment file) { |
| if (NO_CREATE_SYMLINKS_PREFIX.equals(symlinkPrefix)) { |
| return file; |
| } |
| |
| for (Map.Entry<PathFragment, PathFragment> e : resolvedSymlinks.entrySet()) { |
| PathFragment linkFragment = e.getKey(); |
| PathFragment linkTarget = e.getValue(); |
| if (file.startsWith(linkTarget)) { |
| return linkFragment.getRelative(file.relativeTo(linkTarget)); |
| } |
| } |
| |
| return file; |
| } |
| } |