com.android.build.gradle.tasks.MergeResources.groovy Maven / Gradle / Ivy

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Core library to build Android Gradle plugin.
There is a newer version: 2.3.0
/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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.android.build.gradle.tasks

import com.android.build.gradle.internal.tasks.IncrementalTask
import com.android.builder.png.QueuedCruncher
import com.android.ide.common.internal.PngCruncher
import com.android.ide.common.res2.FileStatus
import com.android.ide.common.res2.FileValidity
import com.android.ide.common.res2.MergedResourceWriter
import com.android.ide.common.res2.MergingException
import com.android.ide.common.res2.ResourceMerger
import com.android.ide.common.res2.ResourceSet
import com.android.sdklib.BuildToolInfo
import org.gradle.api.tasks.Input
import org.gradle.api.tasks.InputFiles
import org.gradle.api.tasks.OutputDirectory
import org.gradle.api.tasks.ParallelizableTask

@ParallelizableTask
public class MergeResources extends IncrementalTask {

    // ----- PUBLIC TASK API -----

    @OutputDirectory
    File outputDir

    // ----- PRIVATE TASK API -----

    // fake input to detect changes. Not actually used by the task
    @InputFiles
    Iterable getRawInputFolders() {
        return flattenSourceSets(getInputResourceSets())
    }

    @Input
    String getBuildToolsVersion() {
        getBuildTools().getRevision()
    }

    @Input
    boolean process9Patch

    @Input
    boolean crunchPng

    @Input
    boolean useNewCruncher;

    @Input
    boolean insertSourceMarkers = true

    // actual inputs
    List inputResourceSets

    private final FileValidity fileValidity = new FileValidity();

    @Override
    protected boolean isIncremental() {
        return true
    }

    private PngCruncher getCruncher() {
        if (getUseNewCruncher()) {
            if (builder.getTargetInfo().buildTools.getRevision().getMajor() >= 22) {
                return QueuedCruncher.Builder.INSTANCE.newCruncher(
                        builder.getTargetInfo().buildTools.getPath(
                                BuildToolInfo.PathId.AAPT), builder.getLogger())
            }
            logger.info("New PNG cruncher will be enabled with build tools 22 and above.")
        }
        return builder.aaptCruncher;
    }

    @Override
    protected void doFullTaskAction() {
        // this is full run, clean the previous output
        File destinationDir = getOutputDir()
        emptyFolder(destinationDir)

        List resourceSets = getInputResourceSets()

        // create a new merger and populate it with the sets.
        ResourceMerger merger = new ResourceMerger()

        try {
            for (ResourceSet resourceSet : resourceSets) {
                // set needs to be loaded.
                resourceSet.loadFromFiles(getILogger())
                merger.addDataSet(resourceSet)
            }

            // get the merged set and write it down.
            MergedResourceWriter writer = new MergedResourceWriter(
                    destinationDir, getCruncher(),
                    getCrunchPng(), getProcess9Patch())
            writer.setInsertSourceMarkers(getInsertSourceMarkers())

            merger.mergeData(writer, false /*doCleanUp*/)

            // No exception? Write the known state.
            merger.writeBlobTo(getIncrementalFolder(), writer)
        } catch (MergingException e) {
            println e.getMessage()
            merger.cleanBlob(getIncrementalFolder())
            throw new ResourceException(e.getMessage(), e)
        }
    }

    @Override
    protected void doIncrementalTaskAction(Map changedInputs) {
        // create a merger and load the known state.
        ResourceMerger merger = new ResourceMerger()
        try {
            if (!merger.loadFromBlob(getIncrementalFolder(), true /*incrementalState*/)) {
                doFullTaskAction()
                return
            }

            // compare the known state to the current sets to detect incompatibility.
            // This is in case there's a change that's too hard to do incrementally. In this case
            // we'll simply revert to full build.
            List resourceSets = getInputResourceSets()

            if (!merger.checkValidUpdate(resourceSets)) {
                project.logger.info("Changed Resource sets: full task run!")
                doFullTaskAction()
                return
            }

            // The incremental process is the following:
            // Loop on all the changed files, find which ResourceSet it belongs to, then ask
            // the resource set to update itself with the new file.
            for (Map.Entry entry : changedInputs.entrySet()) {
                File changedFile = entry.getKey()

                merger.findDataSetContaining(changedFile, fileValidity)
                if (fileValidity.status == FileValidity.FileStatus.UNKNOWN_FILE) {
                    doFullTaskAction()
                    return
                } else if (fileValidity.status == FileValidity.FileStatus.VALID_FILE) {
                    if (!fileValidity.dataSet.updateWith(
                            fileValidity.sourceFile, changedFile, entry.getValue(), getILogger())) {
                        project.logger.info(
                                String.format("Failed to process %s event! Full task run",
                                        entry.getValue()))
                        doFullTaskAction()
                        return
                    }
                }
            }

            MergedResourceWriter writer = new MergedResourceWriter(
                    getOutputDir(), getCruncher(),
                    getCrunchPng(), getProcess9Patch())
            writer.setInsertSourceMarkers(getInsertSourceMarkers())
            merger.mergeData(writer, false /*doCleanUp*/)
            // No exception? Write the known state.
            merger.writeBlobTo(getIncrementalFolder(), writer)
        } catch (MergingException e) {
            println e.getMessage()
            merger.cleanBlob(getIncrementalFolder())
            throw new ResourceException(e.getMessage(), e)
        }
    }
}