com.google.devtools.build.lib.bazel.Bazel.java Source code

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Here is the source code for com.google.devtools.build.lib.bazel.Bazel.java

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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.bazel;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.analysis.BlazeVersionInfo;
import com.google.devtools.build.lib.runtime.BlazeModule;
import com.google.devtools.build.lib.runtime.BlazeRuntime;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * The main class.
 */
public final class Bazel {
    private static final String BUILD_DATA_PROPERTIES = "/build-data.properties";

    /**
     * The list of modules to load. Note that the order is important: In case multiple modules provide
     * strategies for the same things, the last module wins and its strategy becomes the default.
     *
     * <p>Example: To make the "standalone" execution strategy the default for spawns, put it after
     * all the other modules that provider spawn strategies (e.g. WorkerModule and SandboxModule).
     */
    public static final ImmutableList<Class<? extends BlazeModule>> BAZEL_MODULES = ImmutableList.of(
            BazelStartupOptionsModule.class, com.google.devtools.build.lib.runtime.BazelFileSystemModule.class,
            com.google.devtools.build.lib.runtime.mobileinstall.MobileInstallModule.class,
            com.google.devtools.build.lib.bazel.BazelWorkspaceStatusModule.class,
            com.google.devtools.build.lib.bazel.BazelDiffAwarenessModule.class,
            com.google.devtools.build.lib.bazel.BazelRepositoryModule.class,
            com.google.devtools.build.lib.skylarkdebug.module.SkylarkDebuggerModule.class,
            com.google.devtools.build.lib.bazel.repository.RepositoryResolvedModule.class,
            com.google.devtools.build.lib.bazel.SpawnLogModule.class,
            com.google.devtools.build.lib.ssd.SsdModule.class,
            com.google.devtools.build.lib.worker.WorkerModule.class,
            com.google.devtools.build.lib.remote.RemoteModule.class,
            com.google.devtools.build.lib.runtime.CacheFileDigestsModule.class,
            com.google.devtools.build.lib.standalone.StandaloneModule.class,
            com.google.devtools.build.lib.sandbox.SandboxModule.class,
            com.google.devtools.build.lib.runtime.BuildSummaryStatsModule.class,
            com.google.devtools.build.lib.bazel.rules.BazelRulesModule.class,
            com.google.devtools.build.lib.bazel.rules.BazelStrategyModule.class,
            com.google.devtools.build.lib.buildeventservice.BazelBuildEventServiceModule.class,
            com.google.devtools.build.lib.profiler.callcounts.CallcountsModule.class,
            com.google.devtools.build.lib.profiler.memory.AllocationTrackerModule.class,
            BazelBuiltinCommandModule.class);

    public static void main(String[] args) {
        BlazeVersionInfo.setBuildInfo(tryGetBuildInfo());
        BlazeRuntime.main(BAZEL_MODULES, args);
    }

    /**
     * Builds the standard build info map from the loaded properties. The returned value is the list
     * of "build.*" properties from the build-data.properties file. The final key is the original one
     * striped, dot replaced with a space and with first letter capitalized. If the file fails to
     * load the returned map is empty.
     */
    private static ImmutableMap<String, String> tryGetBuildInfo() {
        try (InputStream in = Bazel.class.getResourceAsStream(BUILD_DATA_PROPERTIES)) {
            if (in == null) {
                return ImmutableMap.of();
            }
            Properties props = new Properties();
            props.load(in);
            ImmutableMap.Builder<String, String> buildData = ImmutableMap.builder();
            for (Object key : props.keySet()) {
                String stringKey = key.toString();
                if (stringKey.startsWith("build.")) {
                    // build.label -> Build label, build.timestamp.as.int -> Build timestamp as int
                    String buildDataKey = "B" + stringKey.substring(1).replace('.', ' ');
                    buildData.put(buildDataKey, props.getProperty(stringKey, ""));
                }
            }
            return buildData.build();
        } catch (IOException ignored) {
            return ImmutableMap.of();
        }
    }
}