| // Copyright 2016 The Bazel Authors. All rights reserved. |
| // |
| // 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.google.devtools.lcovmerger; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.DirectoryStream; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.nio.file.StandardCopyOption; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * A component that converts language specific raw coverage data to pseudo lcov format. |
| */ |
| class LcovMerger { |
| private static final Logger logger = Logger.getLogger(LcovMerger.class.getName()); |
| |
| private final String outputFile; |
| private final List<File> fileList; |
| |
| /** |
| * Constructs an {@link LcovMerger} and collects the raw coverage files. |
| */ |
| LcovMerger(String originalCoverageFilesDirectory, String generatedCoverageDataOutputPath) { |
| this.fileList = getDatFiles(originalCoverageFilesDirectory); |
| this.outputFile = generatedCoverageDataOutputPath; |
| } |
| |
| /** |
| * Merge all files in {@link fileList} and write to {@link outputFile}. |
| * |
| * @return successful or not |
| */ |
| boolean merge() { |
| if (fileList.isEmpty()) { |
| logger.log(Level.SEVERE, "No lcov file found."); |
| return false; |
| } |
| if (fileList.size() > 1) { |
| logger.log(Level.SEVERE, "Only one lcov file supported now, but found " + fileList.size()); |
| return false; |
| } |
| try { |
| Files.copy( |
| fileList.get(0).toPath(), Paths.get(outputFile), StandardCopyOption.REPLACE_EXISTING); |
| } catch (IOException e) { |
| logger.log(Level.SEVERE, "Failed to copy file: " + e.getMessage()); |
| return false; |
| } |
| return true; |
| } |
| |
| private List<File> getDatFiles(String coverageDir) { |
| List<File> datFiles = new ArrayList<>(); |
| try (DirectoryStream<Path> stream = Files.newDirectoryStream(Paths.get(coverageDir), "*.dat")) { |
| for (Path entry : stream) { |
| datFiles.add(entry.toFile()); |
| } |
| } catch (IOException x) { |
| logger.log(Level.SEVERE, "error reading folder " + coverageDir + ": " + x.getMessage()); |
| } |
| return datFiles; |
| } |
| } |