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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.devtools.build.lib.cmdline.ResolvedTargets;
import com.google.devtools.build.lib.cmdline.TargetParsingException;
import com.google.devtools.build.lib.concurrent.ThreadSafety;
import com.google.devtools.build.lib.events.ExtendedEventHandler;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.List;
/**
* A parser for target patterns. Target patterns are a generalisation of
* labels to include wildcards for finding all packages recursively
* beneath some root, and for finding all targets within a package.
*
* <p>A list of target patterns implies a union of all the labels of each
* pattern. Each item in a list of target patterns may include a prefix
* negation operator, indicating that the sets of targets for this pattern
* should be subtracted from the set of targets for the preceding patterns (note
* this means that order matters). Thus, the following list of target patterns:
* <pre>foo/... -foo/bar:all</pre>
* means "all targets beneath <tt>foo</tt> except for those targets in
* package <tt>foo/bar</tt>.
*/
@ThreadSafety.ConditionallyThreadSafe // as long as you don't call updateOffset.
public interface TargetPatternEvaluator {
static FilteringPolicy DEFAULT_FILTERING_POLICY = FilteringPolicies.NO_FILTER;
/**
* Attempts to parse an ordered list of target patterns, computing the union of the set of targets
* represented by each pattern, unless it is preceded by "-", in which case the set difference is
* computed. Implements the specification described in the class-level comment.
*/
ResolvedTargets<Target> parseTargetPatternList(
PathFragment relativeWorkingDirectory,
ExtendedEventHandler eventHandler,
List<String> targetPatterns,
FilteringPolicy policy,
boolean keepGoing)
throws TargetParsingException, InterruptedException;
}
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