| /* |
| * Copyright 2014-present Facebook, Inc. |
| * |
| * 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.facebook.buck.android; |
| |
| import com.facebook.buck.io.ProjectFilesystem; |
| import com.facebook.buck.step.ExecutionContext; |
| import com.facebook.buck.step.Step; |
| |
| import java.io.IOException; |
| import java.nio.file.Path; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| |
| /** |
| * This step writes the size of a .dex.jar file and the uncompressed size of its contained |
| * classes.dex to the given metadata file. We use this information during |
| * dex file loading to estimate the amount of disk space we'll need. |
| */ |
| class DexJarAnalysisStep implements Step { |
| |
| private final Path dexPath; |
| private final Path dexMetaPath; |
| |
| DexJarAnalysisStep(Path dexPath, Path dexMetaPath) { |
| this.dexPath = dexPath; |
| this.dexMetaPath = dexMetaPath; |
| } |
| |
| @Override |
| public int execute(ExecutionContext context) throws InterruptedException { |
| |
| ProjectFilesystem projectFilesystem = context.getProjectFilesystem(); |
| |
| try (ZipFile zf = new ZipFile(projectFilesystem.resolve(dexPath).toFile())) { |
| ZipEntry classesDexEntry = zf.getEntry("classes.dex"); |
| if (classesDexEntry == null) { |
| throw new RuntimeException("could not find classes.dex in jar"); |
| } |
| |
| long uncompressedSize = classesDexEntry.getSize(); |
| if (uncompressedSize == -1) { |
| throw new RuntimeException("classes.dex size should be known"); |
| } |
| |
| projectFilesystem.writeContentsToPath( |
| String.format( |
| "jar:%s dex:%s", |
| projectFilesystem.getFileSize(dexPath), |
| uncompressedSize), |
| dexMetaPath); |
| |
| return 0; |
| } catch (IOException e) { |
| context.logError(e, "There was an error in smart dexing step."); |
| return 1; |
| } |
| } |
| |
| @Override |
| public String getShortName() { |
| return "dex_meta"; |
| } |
| |
| @Override |
| public String getDescription(ExecutionContext context) { |
| return String.format("dex_meta dexPath:%s dexMetaPath:%s", dexPath, dexMetaPath); |
| } |
| } |