kotlin/workers/src/io/bazel/ruleskotlin/workers/compilers/jvm/actions/CreateOutputJar.java

/*
 * 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 io.bazel.ruleskotlin.workers.compilers.jvm.actions;


import io.bazel.ruleskotlin.workers.BuildAction;
import io.bazel.ruleskotlin.workers.Context;
import io.bazel.ruleskotlin.workers.Flags;
import io.bazel.ruleskotlin.workers.compilers.jvm.Locations;
import io.bazel.ruleskotlin.workers.compilers.jvm.Metas;
import io.bazel.ruleskotlin.workers.utils.IOUtils;

import java.util.Arrays;
import java.util.List;

/**
 * Create a jar from the classes.
 */
public final class CreateOutputJar implements BuildAction {
    public static final CreateOutputJar INSTANCE = new CreateOutputJar();
    private static final String JAR_TOOL_PATH = Locations.JAVA_HOME.resolveVerified("bin", "jar").toString();

    private CreateOutputJar() {
    }

    @Override
    public Integer apply(Context ctx) {
        try {
            List<String> command = Arrays.asList(JAR_TOOL_PATH,
                    "cf", Flags.OUTPUT_CLASSJAR.get(ctx),
                    "-C", Metas.CLASSES_DIRECTORY.mustGet(ctx).toString(),
                    ".");
            IOUtils.executeAndAwaitSuccess(10, command);
        } catch (Exception e) {
            throw new RuntimeException("unable to create class jar", e);
        }
        return 0;
    }
}