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/*
 * Copyright 2013 the original author or authors.
 *
 * 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 org.gradle.initialization.buildsrc;

import org.gradle.api.logging.Logger;
import org.gradle.api.logging.Logging;
import org.gradle.internal.buildtree.BuildTreeLifecycleController;
import org.gradle.internal.classpath.CachedClasspathTransformer;
import org.gradle.internal.classpath.ClassPath;
import org.gradle.internal.classpath.DefaultClassPath;

import javax.annotation.Nonnull;
import java.io.File;
import java.util.Collection;

import static org.gradle.internal.classpath.CachedClasspathTransformer.StandardTransform.BuildLogic;

public class BuildSrcUpdateFactory {
    private static final Logger LOGGER = Logging.getLogger(BuildSrcUpdateFactory.class);

    private final BuildTreeLifecycleController buildController;
    private final BuildSrcBuildListenerFactory listenerFactory;
    private final CachedClasspathTransformer cachedClasspathTransformer;

    public BuildSrcUpdateFactory(BuildTreeLifecycleController buildController, BuildSrcBuildListenerFactory listenerFactory, CachedClasspathTransformer cachedClasspathTransformer) {
        this.buildController = buildController;
        this.listenerFactory = listenerFactory;
        this.cachedClasspathTransformer = cachedClasspathTransformer;
    }

    @Nonnull
    public ClassPath create() {
        Collection classpath = build();
        LOGGER.debug("Gradle source classpath is: {}", classpath);
        return cachedClasspathTransformer.transform(DefaultClassPath.of(classpath), BuildLogic);
    }

    private Collection build() {
        BuildSrcBuildListenerFactory.Listener listener = listenerFactory.create();
        buildController.beforeBuild(gradle -> gradle.addListener(listener));

        buildController.scheduleAndRunTasks();

        return listener.getRuntimeClasspath();
    }
}