| // 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.query2.output; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Ordering; |
| import com.google.devtools.build.lib.collect.CollectionUtils; |
| import com.google.devtools.build.lib.collect.EquivalenceRelation; |
| import com.google.devtools.build.lib.graph.Digraph; |
| import com.google.devtools.build.lib.graph.DotOutputVisitor; |
| import com.google.devtools.build.lib.graph.LabelSerializer; |
| import com.google.devtools.build.lib.graph.Node; |
| import com.google.devtools.build.lib.packages.Target; |
| import com.google.devtools.build.lib.query2.output.QueryOptions.OrderOutput; |
| |
| import java.io.PrintStream; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * An output formatter that prints the result as factored graph in AT&T |
| * GraphViz format. |
| */ |
| class GraphOutputFormatter extends OutputFormatter { |
| |
| private int graphNodeStringLimit; |
| |
| @Override |
| public String getName() { |
| return "graph"; |
| } |
| |
| @Override |
| public void output(QueryOptions options, Digraph<Target> result, PrintStream out, |
| AspectResolver aspectProvider) { |
| this.graphNodeStringLimit = options.graphNodeStringLimit; |
| |
| boolean sortLabels = options.orderOutput == OrderOutput.FULL; |
| if (options.graphFactored) { |
| outputFactored(result, new PrintWriter(out), sortLabels); |
| } else { |
| outputUnfactored(result, new PrintWriter(out), sortLabels); |
| } |
| } |
| |
| private void outputUnfactored(Digraph<Target> result, PrintWriter out, boolean sortLabels) { |
| result.visitNodesBeforeEdges( |
| new DotOutputVisitor<Target>(out, LABEL_STRINGIFIER) { |
| @Override |
| public void beginVisit() { |
| super.beginVisit(); |
| // TODO(bazel-team): (2009) make this the default in Digraph. |
| out.println(" node [shape=box];"); |
| } |
| }, |
| sortLabels ? new TargetOrdering() : null); |
| } |
| |
| private static final Ordering<Node<Target>> NODE_COMPARATOR = |
| Ordering.from(new TargetOrdering()).onResultOf(EXTRACT_NODE_LABEL); |
| |
| private static final Comparator<Iterable<Node<Target>>> ITERABLE_COMPARATOR = |
| NODE_COMPARATOR.lexicographical(); |
| |
| /** |
| * Given {@code collectionOfUnorderedSets}, a collection of sets of nodes, returns a collection |
| * of sets with the same elements as {@code collectionOfUnorderedSets} but with a stable |
| * iteration order within each set given by the target ordering, and the collection ordered by the |
| * same induced order. |
| */ |
| private static Collection<Set<Node<Target>>> orderPartition( |
| Collection<Set<Node<Target>>> collectionOfUnorderedSets) { |
| List<Set<Node<Target>>> result = new ArrayList<>(); |
| for (Set<Node<Target>> part : collectionOfUnorderedSets) { |
| List<Node<Target>> toSort = new ArrayList<>(part); |
| Collections.sort(toSort, NODE_COMPARATOR); |
| result.add(ImmutableSet.copyOf(toSort)); |
| } |
| Collections.sort(result, ITERABLE_COMPARATOR); |
| return result; |
| } |
| |
| private void outputFactored(Digraph<Target> result, PrintWriter out, final boolean sortLabels) { |
| EquivalenceRelation<Node<Target>> equivalenceRelation = createEquivalenceRelation(); |
| |
| Collection<Set<Node<Target>>> partition = |
| CollectionUtils.partition(result.getNodes(), equivalenceRelation); |
| if (sortLabels) { |
| partition = orderPartition(partition); |
| } |
| |
| Digraph<Set<Node<Target>>> factoredGraph = result.createImageUnderPartition(partition); |
| |
| // Concatenate the labels of all topologically-equivalent nodes. |
| LabelSerializer<Set<Node<Target>>> labelSerializer = new LabelSerializer<Set<Node<Target>>>() { |
| @Override |
| public String serialize(Node<Set<Node<Target>>> node) { |
| int actualLimit = graphNodeStringLimit - RESERVED_LABEL_CHARS; |
| boolean firstItem = true; |
| StringBuilder buf = new StringBuilder(); |
| int count = 0; |
| for (Node<Target> eqNode : node.getLabel()) { |
| String labelString = eqNode.getLabel().getLabel().toString(); |
| if (!firstItem) { |
| buf.append("\\n"); |
| |
| // Use -1 to denote no limit, as it is easier than trying to pass MAX_INT on the cmdline |
| if (graphNodeStringLimit != -1 && (buf.length() + labelString.length() > actualLimit)) { |
| buf.append("...and "); |
| buf.append(node.getLabel().size() - count); |
| buf.append(" more items"); |
| break; |
| } |
| } |
| |
| buf.append(labelString); |
| count++; |
| firstItem = false; |
| } |
| return buf.toString(); |
| } |
| }; |
| |
| factoredGraph.visitNodesBeforeEdges( |
| new DotOutputVisitor<Set<Node<Target>>>(out, labelSerializer) { |
| @Override |
| public void beginVisit() { |
| super.beginVisit(); |
| // TODO(bazel-team): (2009) make this the default in Digraph. |
| out.println(" node [shape=box];"); |
| } |
| }, |
| sortLabels ? ITERABLE_COMPARATOR : null); |
| } |
| |
| /** |
| * Returns an equivalence relation for nodes in the specified graph. |
| * |
| * <p>Two nodes are considered equal iff they have equal topology (predecessors and successors). |
| * |
| * TODO(bazel-team): Make this a method of Digraph. |
| */ |
| private static <LABEL> EquivalenceRelation<Node<LABEL>> createEquivalenceRelation() { |
| return new EquivalenceRelation<Node<LABEL>>() { |
| @Override |
| public int compare(Node<LABEL> x, Node<LABEL> y) { |
| if (x == y) { |
| return 0; |
| } |
| |
| if (x.numPredecessors() != y.numPredecessors() |
| || x.numSuccessors() != y.numSuccessors()) { |
| return -1; |
| } |
| |
| Set<Node<LABEL>> xpred = new HashSet<>(x.getPredecessors()); |
| Set<Node<LABEL>> ypred = new HashSet<>(y.getPredecessors()); |
| if (!xpred.equals(ypred)) { |
| return -1; |
| } |
| |
| Set<Node<LABEL>> xsucc = new HashSet<>(x.getSuccessors()); |
| Set<Node<LABEL>> ysucc = new HashSet<>(y.getSuccessors()); |
| if (!xsucc.equals(ysucc)) { |
| return -1; |
| } |
| |
| return 0; |
| } |
| }; |
| } |
| |
| private static final int RESERVED_LABEL_CHARS = "\\n...and 9999999 more items".length(); |
| |
| private static final LabelSerializer<Target> LABEL_STRINGIFIER = new LabelSerializer<Target>() { |
| @Override |
| public String serialize(Node<Target> node) { |
| return node.getLabel().getLabel().toString(); |
| } |
| }; |
| } |