| // 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 static com.google.devtools.lcovmerger.LcovConstants.TRACEFILE_EXTENSION; |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| /** |
| * Command line utility to convert raw coverage files to lcov (text) format. |
| */ |
| public class Main { |
| private static final Logger logger = Logger.getLogger(Main.class.getName()); |
| |
| public static void main(String[] args) { |
| Map<String, String> flags = null; |
| try { |
| flags = parseFlags(args); |
| } catch (IllegalArgumentException e) { |
| logger.log(Level.SEVERE, e.getMessage()); |
| System.exit(1); |
| } |
| |
| List<File> lcovTracefiles = new ArrayList<>(); |
| if (flags.containsKey("coverage_dir")) { |
| logger.log(Level.SEVERE, "Retrieving tracefiles from coverage_dir."); |
| lcovTracefiles = getLcovTracefilesFromDir(flags.get("coverage_dir")); |
| } else if (flags.containsKey("reports_file")) { |
| logger.log(Level.SEVERE, "Retrieving tracefiles from reports_file."); |
| lcovTracefiles = getLcovTracefilesFromFile(flags.get("reports_file")); |
| } |
| if (lcovTracefiles.isEmpty()) { |
| logger.log(Level.SEVERE, "No lcov file found."); |
| System.exit(1); |
| } |
| logger.log(Level.SEVERE, "Found " + lcovTracefiles.size() + " tracefiles."); |
| Coverage coverage = new Coverage(); |
| for (File tracefile : lcovTracefiles) { |
| try { |
| logger.log(Level.SEVERE, "Parsing tracefile " + tracefile.toString()); |
| List<SourceFileCoverage> sourceFilesCoverage = |
| LcovParser.parse(new FileInputStream(tracefile)); |
| for (SourceFileCoverage sourceFileCoverage : sourceFilesCoverage) { |
| coverage.add(sourceFileCoverage); |
| } |
| } catch (IOException e) { |
| logger.log(Level.SEVERE, "Tracefile " + tracefile.getAbsolutePath() + " was deleted"); |
| System.exit(1); |
| } |
| } |
| int exitStatus = 0; |
| String outputFile = flags.get("output_file"); |
| try { |
| File coverageFile = new File(outputFile); |
| LcovPrinter.print(new FileOutputStream(coverageFile), coverage); |
| } catch (IOException e) { |
| logger.log(Level.SEVERE, |
| "Could not write to output file " + outputFile + " due to " + e.getMessage()); |
| exitStatus = 1; |
| } |
| System.exit(exitStatus); |
| } |
| |
| /** |
| * Returns a list of all the files with a “.dat” extension found recursively under the given |
| * directory. |
| */ |
| @VisibleForTesting |
| static List<File> getLcovTracefilesFromDir(String coverageDir) { |
| List<File> datFiles = new ArrayList<>(); |
| try (Stream<Path> stream = Files.walk(Paths.get(coverageDir))) { |
| datFiles = stream.filter(p -> p.toString().endsWith(TRACEFILE_EXTENSION)) |
| .map(path -> path.toFile()) |
| .collect(Collectors.toList()); |
| } catch (IOException ex) { |
| logger.log(Level.SEVERE, "Error reading folder " + coverageDir + ": " + ex.getMessage()); |
| } |
| |
| return datFiles; |
| } |
| |
| static List<File> getLcovTracefilesFromFile(String reportsFile) { |
| List<File> datFiles = new ArrayList<>(); |
| try (FileInputStream inputStream = new FileInputStream(reportsFile)) { |
| InputStreamReader inputStreamReader = new InputStreamReader(inputStream, UTF_8); |
| BufferedReader reader = new BufferedReader(inputStreamReader); |
| for (String tracefile = reader.readLine(); tracefile != null; tracefile = reader.readLine()) { |
| // TODO(elenairina): baseline coverage contains some file names that need to be modified |
| if (!tracefile.endsWith("baseline_coverage.dat")) { |
| datFiles.add(new File(tracefile)); |
| } |
| } |
| |
| } catch (IOException e) { |
| logger.log(Level.SEVERE, "Error reading file " + reportsFile + ": " + e.getMessage()); |
| } |
| return datFiles; |
| } |
| |
| /** |
| * Parse flags in the form of "--coverage_dir=... -output_file=..." |
| */ |
| private static Map<String, String> parseFlags(String[] args) { |
| Map<String, String> flags = new HashMap<>(); |
| |
| for (String arg : args) { |
| if (!arg.startsWith("--")) { |
| throw new IllegalArgumentException("Argument (" + arg + ") should start with --"); |
| } |
| String[] parts = arg.substring(2).split("=", 2); |
| if (parts.length != 2) { |
| throw new IllegalArgumentException("There should be = in argument (" + arg + ")"); |
| } |
| flags.put(parts[0], parts[1]); |
| } |
| |
| // Validate flags |
| for (String flag : flags.keySet()) { |
| switch (flag) { |
| case "coverage_dir": |
| case "reports_file": |
| case "output_file": |
| continue; |
| default: |
| throw new IllegalArgumentException("Unknown flag --" + flag); |
| } |
| } |
| |
| if (!flags.containsKey("coverage_dir") && !flags.containsKey("reports_file")) { |
| throw new IllegalArgumentException( |
| "At least one of --coverage_dir or --reports_file should be specified."); |
| } |
| if (flags.containsKey("coverage_dir") && flags.containsKey("reports_file")) { |
| throw new IllegalArgumentException( |
| "Only one of --coverage_dir or --reports_file must be specified."); |
| } |
| if (!flags.containsKey("output_file")) { |
| // Different from blaze, this should be mandatory |
| throw new IllegalArgumentException("--output_file was not specified"); |
| } |
| |
| return flags; |
| } |
| } |