com.google.devtools.build.xcode.plmerge.PlMerge.java Source code

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Here is the source code for com.google.devtools.build.xcode.plmerge.PlMerge.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.xcode.plmerge;

import com.google.common.base.Strings;
import com.google.devtools.build.xcode.plmerge.proto.PlMergeProtos.Control;
import com.google.devtools.common.options.Option;
import com.google.devtools.common.options.Options;
import com.google.devtools.common.options.OptionsBase;
import com.google.devtools.common.options.OptionsParser;
import com.google.devtools.common.options.OptionsParsingException;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;

/**
 * Entry point for the {@code plmerge} tool, which merges the data from one or more plists into a
 * single binary plist. This tool's functionality is similar to that of the
 * {@code builtin-infoPlistUtility} in Xcode.
 *
 * <p>--control is a control protobuf.
 */
public class PlMerge {
    /**
     * Options for {@link PlMerge}.
     */
    public static class PlMergeOptions extends OptionsBase {
        @Option(name = "control", help = "Absolute path of the Control protobuf.", defaultValue = "null")
        public String controlPath;
    }

    public static void main(String[] args) throws OptionsParsingException, IOException {
        FileSystem fileSystem = FileSystems.getDefault();
        OptionsParser parser = OptionsParser.newOptionsParser(PlMergeOptions.class);
        parser.parse(args);
        PlMergeOptions options = parser.getOptions(PlMergeOptions.class);

        if (options.controlPath == null) {
            missingArg("control");
        }

        InputStream in = Files.newInputStream(fileSystem.getPath(options.controlPath));
        Control control = Control.parseFrom(in);
        validateControl(control);

        PlistMerging merging = PlistMerging.from(control,
                new KeysToRemoveIfEmptyString("CFBundleIconFile", "NSPrincipalClass"));

        String primaryBundleId = Strings.emptyToNull(control.getPrimaryBundleId());
        String fallbackBundleId = Strings.emptyToNull(control.getFallbackBundleId());

        if (primaryBundleId != null || fallbackBundleId != null) {
            // Only set the bundle identifier if we were passed arguments to do so.
            // This prevents CFBundleIdentifiers being put into strings files.
            merging.setBundleIdentifier(primaryBundleId, fallbackBundleId);
        }

        Path outputPath = fileSystem.getPath(control.getOutFile());
        switch (control.getOutputFormat()) {
        case BINARY:
            merging.writePlist(outputPath);
            break;
        case XML:
            merging.writeXmlPlist(outputPath);
            break;
        default:
            throw new IllegalArgumentException(
                    String.format("Unknown output format in the control file: %s", control.getOutputFormat()));
        }
    }

    private static void validateControl(Control control) {
        if (control.getSourceFileList().isEmpty()) {
            missingArg("At least one source_file");
        } else if (!control.hasOutFile()) {
            missingArg("out_file");
        }
    }

    private static void missingArg(String flag) {
        throw new IllegalArgumentException(flag + " is required:\n" + Options.getUsage(PlMergeOptions.class));
    }
}