gradle-master/subprojects/core/src/main/java/org/gradle/internal/composite/ChildBuildRegisteringSettingsLoader.java
/*
 * Copyright 2018 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.internal.composite;

import org.gradle.api.internal.GradleInternal;
import org.gradle.initialization.IncludedBuildSpec;
import org.gradle.initialization.SettingsLoader;
import org.gradle.initialization.SettingsState;
import org.gradle.internal.build.BuildIncluder;
import org.gradle.internal.build.CompositeBuildParticipantBuildState;

import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

public class ChildBuildRegisteringSettingsLoader implements SettingsLoader {

    private final SettingsLoader delegate;

    private final BuildIncluder buildIncluder;

    public ChildBuildRegisteringSettingsLoader(SettingsLoader delegate, BuildIncluder buildIncluder) {
        this.delegate = delegate;
        this.buildIncluder = buildIncluder;
    }

    @Override
    public SettingsState findAndLoadSettings(GradleInternal gradle) {
        SettingsState state = delegate.findAndLoadSettings(gradle);

        // Add included builds defined in settings
        List<IncludedBuildSpec> includedBuilds = state.getSettings().getIncludedBuilds();
        if (!includedBuilds.isEmpty()) {
            Set<IncludedBuildInternal> children = new LinkedHashSet<>(includedBuilds.size());
            for (IncludedBuildSpec includedBuildSpec : includedBuilds) {
                CompositeBuildParticipantBuildState includedBuild = buildIncluder.includeBuild(includedBuildSpec);
                children.add(includedBuild.getModel());
            }

            // Set the visible included builds
            gradle.setIncludedBuilds(children);
        } else {
            gradle.setIncludedBuilds(Collections.emptyList());
        }

        return state;
    }

}
