| // 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.bazel.repository; |
| |
| import com.google.common.base.Strings; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.eventbus.Subscribe; |
| import com.google.common.flogger.GoogleLogger; |
| import com.google.common.io.Files; |
| import com.google.devtools.build.lib.bazel.ResolvedEvent; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.runtime.BlazeModule; |
| import com.google.devtools.build.lib.runtime.Command; |
| import com.google.devtools.build.lib.runtime.CommandEnvironment; |
| import com.google.devtools.build.lib.vfs.XattrProvider; |
| import com.google.devtools.common.options.OptionsBase; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.nio.charset.StandardCharsets; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import net.starlark.java.eval.Printer; |
| |
| /** Module providing the collection of the resolved values for the repository rules executed. */ |
| public final class RepositoryResolvedModule extends BlazeModule { |
| public static final String EXPORTED_NAME = "resolved"; |
| |
| private static final GoogleLogger logger = GoogleLogger.forEnclosingClass(); |
| private Map<String, Object> resolvedValues; |
| private String resolvedFile; |
| private ImmutableList<String> orderedNames; |
| private XattrProvider xattrProvider; |
| |
| @Override |
| public Iterable<Class<? extends OptionsBase>> getCommandOptions(Command command) { |
| return ImmutableSet.of("sync", "fetch", "build", "query").contains(command.name()) |
| ? ImmutableList.of(RepositoryResolvedOptions.class) |
| : ImmutableList.of(); |
| } |
| |
| @Override |
| public void beforeCommand(CommandEnvironment env) { |
| orderedNames = ImmutableList.of(); |
| RepositoryResolvedOptions options = |
| env.getOptions().getOptions(RepositoryResolvedOptions.class); |
| if (options != null && !Strings.isNullOrEmpty(options.repositoryResolvedFile)) { |
| this.resolvedFile = options.repositoryResolvedFile; |
| env.getEventBus().register(this); |
| this.resolvedValues = new LinkedHashMap<>(); |
| } else { |
| this.resolvedFile = null; |
| } |
| this.xattrProvider = env.getXattrProvider(); |
| } |
| |
| @Override |
| public void afterCommand() { |
| if (resolvedFile != null) { |
| ImmutableList.Builder<Object> resultBuilder = new ImmutableList.Builder<>(); |
| // Fill the result builder; first all known repositories in order, then the |
| // rest in the order we knew about them. |
| for (String name : orderedNames) { |
| if (resolvedValues.containsKey(name)) { |
| resultBuilder.add(resolvedValues.get(name)); |
| resolvedValues.remove(name); |
| } |
| } |
| for (Object resolved : resolvedValues.values()) { |
| resultBuilder.add(resolved); |
| } |
| try (Writer writer = Files.newWriter(new File(resolvedFile), StandardCharsets.UTF_8)) { |
| writer.write(EXPORTED_NAME + " = " + new ValuePrinter().repr(resultBuilder.build())); |
| } catch (IOException e) { |
| logger.atWarning().withCause(e).log("IO Error writing to file %s", resolvedFile); |
| } |
| } |
| |
| this.resolvedValues = null; |
| } |
| |
| @Subscribe |
| public void repositoryOrderEvent(RepositoryOrderEvent event) { |
| orderedNames = event.getOrderedNames(); |
| } |
| |
| @Subscribe |
| public void resolved(ResolvedEvent event) { |
| if (resolvedValues != null) { |
| resolvedValues.put(event.getName(), event.getResolvedInformation(xattrProvider)); |
| } |
| } |
| |
| // An printer of repository rule attribute values that inserts properly indented lines between |
| // sequence elements. |
| private static final class ValuePrinter extends Printer { |
| int indent = 0; |
| |
| ValuePrinter() { |
| super(new StringBuilder()); |
| } |
| |
| @Override |
| public Printer repr(Object o) { |
| // In WORKSPACE files, the Label constructor is not available. |
| // Fortunately, in all places where a label is needed, |
| // we can pass the canonical string associated with this label. |
| if (o instanceof Label) { |
| return this.repr(((Label) o).getCanonicalForm()); |
| } |
| return super.repr(o); |
| } |
| |
| @Override |
| public Printer printList(Iterable<?> list, String before, String separator, String after) { |
| this.append(before); |
| indent++; |
| // If the list is empty, do not split the presentation over several lines. |
| String sep = null; |
| for (Object o : list) { |
| if (sep == null) { // first? |
| sep = separator.trim(); |
| } else { |
| this.append(sep); |
| } |
| this.append("\n").append(" ".repeat(5 * indent)).repr(o); |
| } |
| indent--; |
| // Final indent, if nonempty. |
| if (sep != null) { |
| this.append("\n").append(" ".repeat(5 * indent)); |
| } |
| return this.append(after); |
| } |
| } |
| } |