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/*
 * Copyright 2021 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.composite.internal;

import org.gradle.StartParameter;
import org.gradle.api.artifacts.component.BuildIdentifier;
import org.gradle.api.internal.BuildDefinition;
import org.gradle.api.internal.StartParameterInternal;
import org.gradle.initialization.BuildCancellationToken;
import org.gradle.internal.Actions;
import org.gradle.internal.build.BuildState;
import org.gradle.internal.build.PublicBuildPath;
import org.gradle.internal.build.RootBuildState;
import org.gradle.internal.build.StandAloneNestedBuild;
import org.gradle.internal.buildtree.BuildTreeState;
import org.gradle.internal.buildtree.NestedBuildTree;
import org.gradle.internal.deprecation.DeprecationLogger;
import org.gradle.internal.event.ListenerManager;
import org.gradle.internal.scopeids.id.BuildInvocationScopeId;
import org.gradle.internal.service.scopes.GradleUserHomeScopeServiceRegistry;
import org.gradle.internal.service.scopes.Scope;
import org.gradle.internal.service.scopes.ServiceScope;
import org.gradle.internal.session.CrossBuildSessionState;
import org.gradle.plugin.management.internal.PluginRequests;
import org.gradle.util.Path;

import java.io.File;

import static org.gradle.api.internal.SettingsInternal.BUILD_SRC;

@ServiceScope(Scope.BuildTree.class)
public class BuildStateFactory {
    private final BuildTreeState buildTreeState;
    private final ListenerManager listenerManager;
    private final GradleUserHomeScopeServiceRegistry userHomeDirServiceRegistry;
    private final CrossBuildSessionState crossBuildSessionState;
    private final BuildCancellationToken buildCancellationToken;

    public BuildStateFactory(
        BuildTreeState buildTreeState,
        ListenerManager listenerManager,
        GradleUserHomeScopeServiceRegistry userHomeDirServiceRegistry,
        CrossBuildSessionState crossBuildSessionState,
        BuildCancellationToken buildCancellationToken
    ) {
        this.buildTreeState = buildTreeState;
        this.listenerManager = listenerManager;
        this.userHomeDirServiceRegistry = userHomeDirServiceRegistry;
        this.crossBuildSessionState = crossBuildSessionState;
        this.buildCancellationToken = buildCancellationToken;
    }

    public RootBuildState createRootBuild(BuildDefinition buildDefinition) {
        return new DefaultRootBuildState(buildDefinition, buildTreeState, listenerManager);
    }

    public StandAloneNestedBuild createNestedBuild(BuildIdentifier buildIdentifier, Path identityPath, BuildDefinition buildDefinition, BuildState owner) {
        DefaultNestedBuild build = new DefaultNestedBuild(buildIdentifier, identityPath, buildDefinition, owner, buildTreeState);
        // Expose any contributions from the parent's settings
        build.getMutableModel().setClassLoaderScope(() -> owner.getMutableModel().getSettings().getClassLoaderScope());
        return build;
    }

    public NestedBuildTree createNestedTree(
        BuildInvocationScopeId buildInvocationScopeId,
        BuildDefinition buildDefinition,
        BuildIdentifier buildIdentifier,
        Path identityPath,
        BuildState owner
    ) {
        return new DefaultNestedBuildTree(buildInvocationScopeId, buildDefinition, buildIdentifier, identityPath, owner, userHomeDirServiceRegistry, crossBuildSessionState, buildCancellationToken);
    }

    public BuildDefinition buildDefinitionFor(File buildSrcDir, BuildState owner) {
        PublicBuildPath publicBuildPath = owner.getMutableModel().getServices().get(PublicBuildPath.class);
        StartParameterInternal buildSrcStartParameter = buildSrcStartParameterFor(buildSrcDir, owner.getMutableModel().getStartParameter());
        BuildDefinition buildDefinition = BuildDefinition.fromStartParameterForBuild(
            buildSrcStartParameter,
            BUILD_SRC,
            buildSrcDir,
            PluginRequests.EMPTY,
            Actions.doNothing(),
            publicBuildPath,
            true
        );
        @SuppressWarnings("deprecation")
        File customBuildFile = DeprecationLogger.whileDisabled(buildSrcStartParameter::getBuildFile);
        assert customBuildFile == null;
        return buildDefinition;
    }

    private static StartParameterInternal buildSrcStartParameterFor(File buildSrcDir, StartParameter containingBuildParameters) {
        final StartParameterInternal buildSrcStartParameter = (StartParameterInternal) containingBuildParameters.newBuild();
        buildSrcStartParameter.setCurrentDir(buildSrcDir);
        buildSrcStartParameter.setProjectProperties(containingBuildParameters.getProjectProperties());
        buildSrcStartParameter.doNotSearchUpwards();
        buildSrcStartParameter.setInitScripts(containingBuildParameters.getInitScripts());
        return buildSrcStartParameter;
    }
}