org.refactoringminer.rm1.GitHistoryRefactoringMinerImpl Maven / Gradle / Ivy
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RefactoringMiner is a library/API written in Java that can detect refactorings applied in the history of a Java project.
package org.refactoringminer.rm1;
import gr.uom.java.xmi.UMLModel;
import gr.uom.java.xmi.UMLModelASTReader;
import gr.uom.java.xmi.diff.MoveSourceFolderRefactoring;
import gr.uom.java.xmi.diff.MovedClassToAnotherSourceFolder;
import gr.uom.java.xmi.diff.RenamePattern;
import gr.uom.java.xmi.diff.StringDistance;
import gr.uom.java.xmi.diff.UMLModelDiff;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.StringWriter;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.regex.Matcher;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.tuple.Pair;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectLoader;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevTree;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.kohsuke.github.GHCommit;
import org.kohsuke.github.GHPullRequest;
import org.kohsuke.github.GHPullRequestCommitDetail;
import org.kohsuke.github.GHPullRequestFileDetail;
import org.kohsuke.github.GHRepository;
import org.kohsuke.github.GHRepositoryWrapper;
import org.kohsuke.github.GHTree;
import org.kohsuke.github.GHTreeEntry;
import org.kohsuke.github.GitHub;
import org.kohsuke.github.PagedIterable;
import org.refactoringminer.api.GitHistoryRefactoringMiner;
import org.refactoringminer.api.GitService;
import org.refactoringminer.api.Refactoring;
import org.refactoringminer.api.RefactoringHandler;
import org.refactoringminer.api.RefactoringMinerTimedOutException;
import org.refactoringminer.api.RefactoringType;
import org.refactoringminer.astDiff.models.ProjectASTDiff;
import org.refactoringminer.astDiff.matchers.ProjectASTDiffer;
import org.refactoringminer.util.GitServiceImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.difflib.DiffUtils;
import com.github.difflib.UnifiedDiffUtils;
public class GitHistoryRefactoringMinerImpl implements GitHistoryRefactoringMiner {
private final static Logger logger = LoggerFactory.getLogger(GitHistoryRefactoringMinerImpl.class);
private Set refactoringTypesToConsider = null;
private GitHub gitHub;
public GitHistoryRefactoringMinerImpl() {
this.setRefactoringTypesToConsider(RefactoringType.ALL);
}
public void setRefactoringTypesToConsider(RefactoringType ... types) {
this.refactoringTypesToConsider = new HashSet();
for (RefactoringType type : types) {
this.refactoringTypesToConsider.add(type);
}
}
private void detect(GitService gitService, Repository repository, final RefactoringHandler handler, Iterator i) {
int commitsCount = 0;
int errorCommitsCount = 0;
int refactoringsCount = 0;
File metadataFolder = repository.getDirectory();
File projectFolder = metadataFolder.getParentFile();
String projectName = projectFolder.getName();
long time = System.currentTimeMillis();
while (i.hasNext()) {
RevCommit currentCommit = i.next();
try {
List refactoringsAtRevision = detectRefactorings(gitService, repository, handler, currentCommit);
refactoringsCount += refactoringsAtRevision.size();
} catch (Exception e) {
logger.warn(String.format("Ignored revision %s due to error", currentCommit.getId().getName()), e);
handler.handleException(currentCommit.getId().getName(),e);
errorCommitsCount++;
}
commitsCount++;
long time2 = System.currentTimeMillis();
if ((time2 - time) > 20000) {
time = time2;
logger.info(String.format("Processing %s [Commits: %d, Errors: %d, Refactorings: %d]", projectName, commitsCount, errorCommitsCount, refactoringsCount));
}
}
handler.onFinish(refactoringsCount, commitsCount, errorCommitsCount);
logger.info(String.format("Analyzed %s [Commits: %d, Errors: %d, Refactorings: %d]", projectName, commitsCount, errorCommitsCount, refactoringsCount));
}
protected List detectRefactorings(GitService gitService, Repository repository, final RefactoringHandler handler, RevCommit currentCommit) throws Exception {
List refactoringsAtRevision;
UMLModelDiff modelDiff;
String commitId = currentCommit.getId().getName();
Set filePathsBefore = new LinkedHashSet();
Set filePathsCurrent = new LinkedHashSet();
Map renamedFilesHint = new HashMap();
gitService.fileTreeDiff(repository, currentCommit, filePathsBefore, filePathsCurrent, renamedFilesHint);
Set repositoryDirectoriesBefore = new LinkedHashSet();
Set repositoryDirectoriesCurrent = new LinkedHashSet();
Map fileContentsBefore = new LinkedHashMap();
Map fileContentsCurrent = new LinkedHashMap();
// If no java files changed, there is no refactoring. Also, if there are
// only ADD's or only REMOVE's there is no refactoring
if (!filePathsBefore.isEmpty() && !filePathsCurrent.isEmpty() && currentCommit.getParentCount() > 0) {
RevCommit parentCommit = currentCommit.getParent(0);
populateFileContents(repository, parentCommit, filePathsBefore, fileContentsBefore, repositoryDirectoriesBefore);
populateFileContents(repository, currentCommit, filePathsCurrent, fileContentsCurrent, repositoryDirectoriesCurrent);
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, renamedFilesHint, false);
UMLModel parentUMLModel = createModel(fileContentsBefore, repositoryDirectoriesBefore);
UMLModel currentUMLModel = createModel(fileContentsCurrent, repositoryDirectoriesCurrent);
modelDiff = parentUMLModel.diff(currentUMLModel);
refactoringsAtRevision = modelDiff.getRefactorings();
refactoringsAtRevision.addAll(moveSourceFolderRefactorings);
refactoringsAtRevision = filter(refactoringsAtRevision);
} else {
//logger.info(String.format("Ignored revision %s with no changes in java files", commitId));
modelDiff = new UMLModelDiff(createModel(Collections.emptyMap(), Collections.emptySet()), createModel(Collections.emptyMap(), Collections.emptySet()));
refactoringsAtRevision = Collections.emptyList();
}
handler.handle(commitId, refactoringsAtRevision);
handler.handleModelDiff(commitId, refactoringsAtRevision, modelDiff);
return refactoringsAtRevision;
}
public static List processIdenticalFiles(Map fileContentsBefore, Map fileContentsCurrent,
Map renamedFilesHint, boolean astDiff) throws IOException {
Map identicalFiles = new HashMap();
Map, Integer> consistentSourceFolderChanges = new HashMap<>();
Map nonIdenticalFiles = new HashMap();
for(String key : fileContentsBefore.keySet()) {
//take advantage of renamed file hints, if available
if(renamedFilesHint.containsKey(key)) {
String renamedFile = renamedFilesHint.get(key);
String fileBefore = fileContentsBefore.get(key);
String fileAfter = fileContentsCurrent.get(renamedFile);
if(matchCondition(fileBefore, fileAfter, astDiff)) {
identicalFiles.put(key, renamedFile);
if(key.contains("/") && renamedFile.contains("/")) {
String prefix1 = key.substring(0, key.indexOf("/"));
String prefix2 = renamedFile.substring(0, renamedFile.indexOf("/"));
Pair p = Pair.of(prefix1, prefix2);
if(consistentSourceFolderChanges.containsKey(p)) {
consistentSourceFolderChanges.put(p, consistentSourceFolderChanges.get(p) + 1);
}
else {
consistentSourceFolderChanges.put(p, 1);
}
}
}
else {
nonIdenticalFiles.put(key, renamedFile);
}
}
if(fileContentsCurrent.containsKey(key)) {
String fileBefore = fileContentsBefore.get(key);
String fileAfter = fileContentsCurrent.get(key);
if(matchCondition(fileBefore, fileAfter, astDiff)) {
identicalFiles.put(key, key);
}
else {
nonIdenticalFiles.put(key, key);
}
}
}
fileContentsBefore.keySet().removeAll(identicalFiles.keySet());
fileContentsCurrent.keySet().removeAll(identicalFiles.values());
//second iteration to find renamed/moved files with identical contents
for(String key1 : fileContentsBefore.keySet()) {
if(!identicalFiles.containsKey(key1) && !nonIdenticalFiles.containsKey(key1) && key1.contains("/")) {
String prefix1 = key1.substring(0, key1.indexOf("/"));
String fileBefore = fileContentsBefore.get(key1);
boolean matchWithConsistentSourceFolderChangeFound = false;
List matches = new ArrayList();
for(String key2 : fileContentsCurrent.keySet()) {
if(!identicalFiles.containsValue(key2) && !nonIdenticalFiles.containsValue(key2) && key2.contains("/")) {
String prefix2 = key2.substring(0, key2.indexOf("/"));
String fileAfter = fileContentsCurrent.get(key2);
if(matchCondition(fileBefore, fileAfter, astDiff)) {
if(consistentSourceFolderChanges.containsKey(Pair.of(prefix1, prefix2))) {
identicalFiles.put(key1, key2);
matchWithConsistentSourceFolderChangeFound = true;
break;
}
else {
matches.add(key2);
}
}
}
}
if(!matchWithConsistentSourceFolderChangeFound) {
if(matches.size() == 1) {
identicalFiles.put(key1, matches.get(0));
}
else if(matches.size() > 1) {
int minEditDistance = key1.length();
String bestMatch = null;
for(int i=0; i< matches.size(); i++) {
String key2 = matches.get(i);
int editDistance = StringDistance.editDistance(key1, key2);
if(editDistance < minEditDistance) {
minEditDistance = editDistance;
bestMatch = key2;
}
}
if(bestMatch != null) {
identicalFiles.put(key1, bestMatch);
}
}
}
}
}
fileContentsBefore.keySet().removeAll(identicalFiles.keySet());
fileContentsCurrent.keySet().removeAll(identicalFiles.values());
List moveSourceFolderRefactorings = new ArrayList();
for(String key : identicalFiles.keySet()) {
String originalPath = key;
String movedPath = identicalFiles.get(key);
String originalPathPrefix = "";
if(originalPath.contains("/")) {
originalPathPrefix = originalPath.substring(0, originalPath.lastIndexOf('/'));
}
String movedPathPrefix = "";
if(movedPath.contains("/")) {
movedPathPrefix = movedPath.substring(0, movedPath.lastIndexOf('/'));
}
if(!originalPathPrefix.equals(movedPathPrefix) && !key.endsWith("package-info.java")) {
MovedClassToAnotherSourceFolder refactoring = new MovedClassToAnotherSourceFolder(null, null, originalPathPrefix, movedPathPrefix);
RenamePattern renamePattern = refactoring.getRenamePattern();
boolean foundInMatchingMoveSourceFolderRefactoring = false;
for(MoveSourceFolderRefactoring moveSourceFolderRefactoring : moveSourceFolderRefactorings) {
if(moveSourceFolderRefactoring.getPattern().equals(renamePattern)) {
moveSourceFolderRefactoring.putIdenticalFilePaths(originalPath, movedPath);
foundInMatchingMoveSourceFolderRefactoring = true;
break;
}
}
if(!foundInMatchingMoveSourceFolderRefactoring) {
MoveSourceFolderRefactoring moveSourceFolderRefactoring = new MoveSourceFolderRefactoring(renamePattern);
moveSourceFolderRefactoring.putIdenticalFilePaths(originalPath, movedPath);
moveSourceFolderRefactorings.add(moveSourceFolderRefactoring);
}
}
}
return moveSourceFolderRefactorings;
}
private static boolean matchCondition(String fileBefore, String fileAfter, boolean astDiff) throws IOException {
if(astDiff) {
return fileBefore.equals(fileAfter);
}
return fileBefore.equals(fileAfter) || StringDistance.trivialCommentChange(fileBefore, fileAfter);
}
public static void populateFileContents(Repository repository, RevCommit commit,
Set filePaths, Map fileContents, Set repositoryDirectories) throws Exception {
logger.info("Processing {} {} ...", repository.getDirectory().getParent().toString(), commit.getName());
RevTree parentTree = commit.getTree();
try (TreeWalk treeWalk = new TreeWalk(repository)) {
treeWalk.addTree(parentTree);
treeWalk.setRecursive(true);
while (treeWalk.next()) {
String pathString = treeWalk.getPathString();
if(filePaths.contains(pathString)) {
ObjectId objectId = treeWalk.getObjectId(0);
ObjectLoader loader = repository.open(objectId);
StringWriter writer = new StringWriter();
IOUtils.copy(loader.openStream(), writer);
fileContents.put(pathString, writer.toString());
}
if(pathString.endsWith(".java") && pathString.contains("/")) {
String directory = pathString.substring(0, pathString.lastIndexOf("/"));
repositoryDirectories.add(directory);
//include sub-directories
String subDirectory = new String(directory);
while(subDirectory.contains("/")) {
subDirectory = subDirectory.substring(0, subDirectory.lastIndexOf("/"));
repositoryDirectories.add(subDirectory);
}
}
}
}
}
public static void populateFileContentsAndSave(Repository repository, RevCommit commit,
Set filePaths, Map fileContents, Set repositoryDirectories, File rootFolder) throws Exception {
String cloneURL = repository.getConfig().getString("remote", "origin", "url");
String repoName = cloneURL.substring(cloneURL.lastIndexOf('/') + 1, cloneURL.lastIndexOf('.'));
logger.info("Processing {} {} ...", repository.getDirectory().getParent().toString(), commit.getName());
RevTree parentTree = commit.getTree();
try (TreeWalk treeWalk = new TreeWalk(repository)) {
treeWalk.addTree(parentTree);
treeWalk.setRecursive(true);
while (treeWalk.next()) {
String pathString = treeWalk.getPathString();
if(filePaths.contains(pathString)) {
ObjectId objectId = treeWalk.getObjectId(0);
ObjectLoader loader = repository.open(objectId);
StringWriter writer = new StringWriter();
IOUtils.copy(loader.openStream(), writer);
String fileContent = writer.toString();
fileContents.put(pathString, fileContent);
File currentFilePath = new File(rootFolder, repoName + "-" + commit.getId().getName() + "/" + pathString);
FileUtils.writeStringToFile(currentFilePath, fileContent);
}
if(pathString.endsWith(".java") && pathString.contains("/")) {
String directory = pathString.substring(0, pathString.lastIndexOf("/"));
repositoryDirectories.add(directory);
//include sub-directories
String subDirectory = new String(directory);
while(subDirectory.contains("/")) {
subDirectory = subDirectory.substring(0, subDirectory.lastIndexOf("/"));
repositoryDirectories.add(subDirectory);
}
}
}
}
}
protected List detectRefactorings(final RefactoringHandler handler, File projectFolder, String cloneURL, String currentCommitId) {
List refactoringsAtRevision = Collections.emptyList();
UMLModelDiff modelDiff;
try {
ChangedFileInfo changedFileInfo = populateWithGitHubAPI(projectFolder, cloneURL, currentCommitId);
String parentCommitId = changedFileInfo.getParentCommitId();
List filesBefore = changedFileInfo.getFilesBefore();
List filesCurrent = changedFileInfo.getFilesCurrent();
Map renamedFilesHint = changedFileInfo.getRenamedFilesHint();
File currentFolder = new File(projectFolder.getParentFile(), projectFolder.getName() + "-" + currentCommitId);
File parentFolder = new File(projectFolder.getParentFile(), projectFolder.getName() + "-" + parentCommitId);
if (!currentFolder.exists()) {
downloadAndExtractZipFile(projectFolder, cloneURL, currentCommitId);
}
if (!parentFolder.exists()) {
downloadAndExtractZipFile(projectFolder, cloneURL, parentCommitId);
}
Set repositoryDirectoriesBefore = new LinkedHashSet();
Set repositoryDirectoriesCurrent = new LinkedHashSet();
Map fileContentsBefore = new LinkedHashMap();
Map fileContentsCurrent = new LinkedHashMap();
if (currentFolder.exists() && parentFolder.exists()) {
populateFileContents(currentFolder, filesCurrent, fileContentsCurrent, repositoryDirectoriesCurrent);
populateFileContents(parentFolder, filesBefore, fileContentsBefore, repositoryDirectoriesBefore);
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, renamedFilesHint, false);
UMLModel parentUMLModel = createModel(fileContentsBefore, repositoryDirectoriesBefore);
UMLModel currentUMLModel = createModel(fileContentsCurrent, repositoryDirectoriesCurrent);
modelDiff = parentUMLModel.diff(currentUMLModel);
refactoringsAtRevision = modelDiff.getRefactorings();
refactoringsAtRevision.addAll(moveSourceFolderRefactorings);
refactoringsAtRevision = filter(refactoringsAtRevision);
}
else {
modelDiff = new UMLModelDiff(createModel(Collections.emptyMap(), Collections.emptySet()), createModel(Collections.emptyMap(), Collections.emptySet()));
logger.warn(String.format("Folder %s not found", currentFolder.getPath()));
}
handler.handle(currentCommitId, refactoringsAtRevision);
handler.handleModelDiff(currentCommitId, refactoringsAtRevision, modelDiff);
} catch (Exception e) {
logger.warn(String.format("Ignored revision %s due to error", currentCommitId), e);
handler.handleException(currentCommitId, e);
}
return refactoringsAtRevision;
}
private static void populateFileContents(File projectFolder, List filePaths, Map fileContents, Set repositoryDirectories) throws IOException {
for(String path : filePaths) {
String fullPath = projectFolder + File.separator + path.replaceAll("/", systemFileSeparator);
String contents = FileUtils.readFileToString(new File(fullPath));
fileContents.put(path, contents);
String directory = new String(path);
while(directory.contains("/")) {
directory = directory.substring(0, directory.lastIndexOf("/"));
repositoryDirectories.add(directory);
}
}
}
private void downloadAndExtractZipFile(File projectFolder, String cloneURL, String commitId)
throws IOException {
String downloadLink = extractDownloadLink(cloneURL, commitId);
File destinationFile = new File(projectFolder.getParentFile(), projectFolder.getName() + "-" + commitId + ".zip");
logger.info(String.format("Downloading archive %s", downloadLink));
FileUtils.copyURLToFile(new URL(downloadLink), destinationFile);
logger.info(String.format("Unzipping archive %s", downloadLink));
java.util.zip.ZipFile zipFile = new ZipFile(destinationFile);
try {
Enumeration entries = zipFile.entries();
while (entries.hasMoreElements()) {
ZipEntry entry = entries.nextElement();
File entryDestination = new File(projectFolder.getParentFile(), entry.getName());
if (entry.isDirectory()) {
entryDestination.mkdirs();
} else {
entryDestination.getParentFile().mkdirs();
InputStream in = zipFile.getInputStream(entry);
OutputStream out = new FileOutputStream(entryDestination);
IOUtils.copy(in, out);
IOUtils.closeQuietly(in);
out.close();
}
}
} finally {
zipFile.close();
}
}
public static class ChangedFileInfo {
private String parentCommitId;
private String currentCommitId;
private List filesBefore;
private List filesCurrent;
private Map renamedFilesHint;
private Set repositoryDirectoriesBefore;
private Set repositoryDirectoriesCurrent;
private long commitTime;
private long authoredTime;
private String commitAuthorName;
public ChangedFileInfo() {
}
public ChangedFileInfo(String parentCommitId, List filesBefore,
List filesCurrent, Map renamedFilesHint) {
this.filesBefore = filesBefore;
this.filesCurrent = filesCurrent;
this.renamedFilesHint = renamedFilesHint;
this.parentCommitId = parentCommitId;
}
public ChangedFileInfo(String parentCommitId, String currentCommitId,
List filesBefore, List filesCurrent,
Set repositoryDirectoriesBefore, Set repositoryDirectoriesCurrent, Map renamedFilesHint) {
this.filesBefore = filesBefore;
this.filesCurrent = filesCurrent;
this.renamedFilesHint = renamedFilesHint;
this.repositoryDirectoriesBefore = repositoryDirectoriesBefore;
this.repositoryDirectoriesCurrent = repositoryDirectoriesCurrent;
this.parentCommitId = parentCommitId;
this.currentCommitId = currentCommitId;
}
public ChangedFileInfo(String parentCommitId, String currentCommitId,
List filesBefore, List filesCurrent,
Set repositoryDirectoriesBefore, Set repositoryDirectoriesCurrent, Map renamedFilesHint,
long commitTime, long authoredTime, String commitAuthorName) {
this.filesBefore = filesBefore;
this.filesCurrent = filesCurrent;
this.renamedFilesHint = renamedFilesHint;
this.repositoryDirectoriesBefore = repositoryDirectoriesBefore;
this.repositoryDirectoriesCurrent = repositoryDirectoriesCurrent;
this.parentCommitId = parentCommitId;
this.currentCommitId = currentCommitId;
this.commitTime = commitTime;
this.authoredTime = authoredTime;
this.commitAuthorName = commitAuthorName;
}
public String getParentCommitId() {
return parentCommitId;
}
public String getCurrentCommitId() {
return currentCommitId;
}
public List getFilesBefore() {
return filesBefore;
}
public List getFilesCurrent() {
return filesCurrent;
}
public Set getRepositoryDirectoriesBefore() {
return repositoryDirectoriesBefore;
}
public Set getRepositoryDirectoriesCurrent() {
return repositoryDirectoriesCurrent;
}
public Map getRenamedFilesHint() {
return renamedFilesHint;
}
public long getCommitTime() {
return commitTime;
}
public long getAuthoredTime() {
return authoredTime;
}
public String getCommitAuthorName() {
return commitAuthorName;
}
}
private ChangedFileInfo populateWithGitHubAPI(File projectFolder, String cloneURL, String currentCommitId) throws IOException {
logger.info("Processing {} {} ...", cloneURL, currentCommitId);
String jsonFilePath = projectFolder.getName() + "-" + currentCommitId + ".json";
File jsonFile = new File(projectFolder.getParent(), jsonFilePath);
if(jsonFile.exists()) {
final ObjectMapper mapper = new ObjectMapper();
ChangedFileInfo changedFileInfo = mapper.readValue(jsonFile, ChangedFileInfo.class);
return changedFileInfo;
}
else {
GHRepository repository = getGitHubRepository(cloneURL);
List commitFiles = new ArrayList<>();
GHCommit commit = new GHRepositoryWrapper(repository).getCommit(currentCommitId, commitFiles);
//if parents.size() == 0 then currentCommit is the initial commit of the repository, but then all files will have an ADDED status
String parentCommitId = commit.getParents().size() > 0 ? commit.getParents().get(0).getSHA1() : null;
List filesBefore = new ArrayList();
List filesCurrent = new ArrayList();
Map renamedFilesHint = new HashMap();
for (GHCommit.File commitFile : commitFiles) {
if (commitFile.getFileName().endsWith(".java")) {
if (commitFile.getStatus().equals("modified")) {
filesBefore.add(commitFile.getFileName());
filesCurrent.add(commitFile.getFileName());
}
else if (commitFile.getStatus().equals("added")) {
filesCurrent.add(commitFile.getFileName());
}
else if (commitFile.getStatus().equals("removed")) {
filesBefore.add(commitFile.getFileName());
}
else if (commitFile.getStatus().equals("renamed")) {
filesBefore.add(commitFile.getPreviousFilename());
filesCurrent.add(commitFile.getFileName());
renamedFilesHint.put(commitFile.getPreviousFilename(), commitFile.getFileName());
}
}
}
ChangedFileInfo changedFileInfo = new ChangedFileInfo(parentCommitId, filesBefore, filesCurrent, renamedFilesHint);
final ObjectMapper mapper = new ObjectMapper();
mapper.writeValue(jsonFile, changedFileInfo);
return changedFileInfo;
}
}
private GitHub connectToGitHub() {
if(gitHub == null) {
try {
String oAuthToken = System.getenv("OAuthToken");
if (oAuthToken == null || oAuthToken.isEmpty()) {
Properties prop = new Properties();
InputStream input = new FileInputStream("github-oauth.properties");
prop.load(input);
oAuthToken = prop.getProperty("OAuthToken");
}
if (oAuthToken != null) {
gitHub = GitHub.connectUsingOAuth(oAuthToken);
if(gitHub.isCredentialValid()) {
logger.info("Connected to GitHub with OAuth token");
}
}
else {
gitHub = GitHub.connect();
}
} catch(FileNotFoundException e) {
logger.warn("File github-oauth.properties was not found in RefactoringMiner's execution directory", e);
} catch(IOException ioe) {
ioe.printStackTrace();
}
}
return gitHub;
}
protected List filter(List refactoringsAtRevision) {
if (this.refactoringTypesToConsider == null) {
return refactoringsAtRevision;
}
List filteredList = new ArrayList();
for (Refactoring ref : refactoringsAtRevision) {
if (this.refactoringTypesToConsider.contains(ref.getRefactoringType())) {
filteredList.add(ref);
}
}
return filteredList;
}
@Override
public void detectAll(Repository repository, String branch, final RefactoringHandler handler) throws Exception {
GitService gitService = new GitServiceImpl() {
@Override
public boolean isCommitAnalyzed(String sha1) {
return handler.skipCommit(sha1);
}
};
RevWalk walk = gitService.createAllRevsWalk(repository, branch);
try {
detect(gitService, repository, handler, walk.iterator());
} finally {
walk.dispose();
}
}
@Override
public void fetchAndDetectNew(Repository repository, final RefactoringHandler handler) throws Exception {
GitService gitService = new GitServiceImpl() {
@Override
public boolean isCommitAnalyzed(String sha1) {
return handler.skipCommit(sha1);
}
};
RevWalk walk = gitService.fetchAndCreateNewRevsWalk(repository);
try {
detect(gitService, repository, handler, walk.iterator());
} finally {
walk.dispose();
}
}
public static UMLModel createModel(Map fileContents, Set repositoryDirectories) throws Exception {
return new UMLModelASTReader(fileContents, repositoryDirectories, false).getUmlModel();
}
public static UMLModel createModelForASTDiff(Map fileContents, Set repositoryDirectories) throws Exception {
return new UMLModelASTReader(fileContents, repositoryDirectories, true).getUmlModel();
}
private static final String systemFileSeparator = Matcher.quoteReplacement(File.separator);
private static List getJavaFilePaths(File folder) throws IOException {
Stream walk = Files.walk(Paths.get(folder.toURI()));
List paths = walk.map(x -> x.toString())
.filter(f -> f.endsWith(".java"))
.map(x -> x.substring(folder.getPath().length()+1).replaceAll(systemFileSeparator, "/"))
.collect(Collectors.toList());
walk.close();
return paths;
}
private static Set populateDirectories(Map fileContents) {
Set repositoryDirectories = new LinkedHashSet<>();
for(String path : fileContents.keySet()) {
String directory = new String(path);
while(directory.contains("/")) {
directory = directory.substring(0, directory.lastIndexOf("/"));
repositoryDirectories.add(directory);
}
}
return repositoryDirectories;
}
@Override
public void detectAtFileContents(Map fileContentsBefore, Map fileContentsAfter, RefactoringHandler handler) {
List refactorings = Collections.emptyList();
Set repositoryDirectoriesBefore = populateDirectories(fileContentsBefore);
Set repositoryDirectoriesCurrent = populateDirectories(fileContentsAfter);
String rootDirBefore = repositoryDirectoriesBefore.stream()
.sorted(Comparator.comparingInt(String::length))
.findFirst()
.orElse("");
String rootDirCurrent = repositoryDirectoriesCurrent.stream()
.sorted(Comparator.comparingInt(String::length))
.findFirst()
.orElse("");
String id = rootDirBefore + " -> " + rootDirCurrent;
try {
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsAfter, Collections.emptyMap(), false);
UMLModel parentUMLModel = createModel(fileContentsBefore, repositoryDirectoriesBefore);
UMLModel currentUMLModel = createModel(fileContentsAfter, repositoryDirectoriesCurrent);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
refactorings = modelDiff.getRefactorings();
refactorings.addAll(moveSourceFolderRefactorings);
refactorings = filter(refactorings);
handler.handleModelDiff(id, refactorings, modelDiff);
} catch (Exception e) {
logger.warn(String.format("Ignored revision %s due to error", id), e);
handler.handleException(id, e);
}
handler.handle(id, refactorings);
}
@Override
public void detectAtDirectories(Path previousPath, Path nextPath, RefactoringHandler handler) {
File previousFile = previousPath.toFile();
File nextFile = nextPath.toFile();
detectAtDirectories(previousFile, nextFile, handler);
}
@Override
public void detectAtDirectories(File previousFile, File nextFile, RefactoringHandler handler) {
if(previousFile.exists() && nextFile.exists()) {
List refactorings = Collections.emptyList();
String id = previousFile.getName() + " -> " + nextFile.getName();
try {
if(previousFile.isDirectory() && nextFile.isDirectory()) {
Set repositoryDirectoriesBefore = new LinkedHashSet();
Set repositoryDirectoriesCurrent = new LinkedHashSet();
Map fileContentsBefore = new LinkedHashMap();
Map fileContentsCurrent = new LinkedHashMap();
populateFileContents(nextFile, getJavaFilePaths(nextFile), fileContentsCurrent, repositoryDirectoriesCurrent);
populateFileContents(previousFile, getJavaFilePaths(previousFile), fileContentsBefore, repositoryDirectoriesBefore);
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, Collections.emptyMap(), false);
UMLModel parentUMLModel = createModel(fileContentsBefore, repositoryDirectoriesBefore);
UMLModel currentUMLModel = createModel(fileContentsCurrent, repositoryDirectoriesCurrent);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
refactorings = modelDiff.getRefactorings();
refactorings.addAll(moveSourceFolderRefactorings);
refactorings = filter(refactorings);
handler.handleModelDiff(id, refactorings, modelDiff);
}
else if(previousFile.isFile() && nextFile.isFile()) {
String previousFileName = previousFile.getName();
String nextFileName = nextFile.getName();
if(previousFileName.endsWith(".java") && nextFileName.endsWith(".java")) {
Set repositoryDirectoriesBefore = new LinkedHashSet();
Set repositoryDirectoriesCurrent = new LinkedHashSet();
Map fileContentsBefore = new LinkedHashMap();
Map fileContentsCurrent = new LinkedHashMap();
populateFileContents(nextFile.getParentFile(), List.of(nextFileName), fileContentsCurrent, repositoryDirectoriesCurrent);
populateFileContents(previousFile.getParentFile(), List.of(previousFileName), fileContentsBefore, repositoryDirectoriesBefore);
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, Collections.emptyMap(), false);
UMLModel parentUMLModel = createModelForASTDiff(fileContentsBefore, repositoryDirectoriesBefore);
UMLModel currentUMLModel = createModelForASTDiff(fileContentsCurrent, repositoryDirectoriesCurrent);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
refactorings = modelDiff.getRefactorings();
refactorings.addAll(moveSourceFolderRefactorings);
refactorings = filter(refactorings);
handler.handleModelDiff(id, refactorings, modelDiff);
}
}
}
catch (Exception e) {
logger.warn(String.format("Ignored revision %s due to error", id), e);
handler.handleException(id, e);
}
handler.handle(id, refactorings);
}
}
@Override
public void detectAtCommit(Repository repository, String commitId, RefactoringHandler handler) {
String cloneURL = repository.getConfig().getString("remote", "origin", "url");
File metadataFolder = repository.getDirectory();
File projectFolder = metadataFolder.getParentFile();
GitService gitService = new GitServiceImpl();
RevWalk walk = new RevWalk(repository);
try {
RevCommit commit = walk.parseCommit(repository.resolve(commitId));
if (commit.getParentCount() > 0) {
walk.parseCommit(commit.getParent(0));
this.detectRefactorings(gitService, repository, handler, commit);
}
else {
logger.warn(String.format("Ignored revision %s because it has no parent", commitId));
}
} catch (MissingObjectException moe) {
this.detectRefactorings(handler, projectFolder, cloneURL, commitId);
} catch (RefactoringMinerTimedOutException e) {
logger.warn(String.format("Ignored revision %s due to timeout", commitId), e);
} catch (Exception e) {
logger.warn(String.format("Ignored revision %s due to error", commitId), e);
handler.handleException(commitId, e);
} finally {
walk.close();
walk.dispose();
}
}
public void detectAtCommit(Repository repository, String commitId, RefactoringHandler handler, int timeout) {
ExecutorService service = Executors.newSingleThreadExecutor();
Future f = null;
try {
Runnable r = () -> detectAtCommit(repository, commitId, handler);
f = service.submit(r);
f.get(timeout, TimeUnit.SECONDS);
} catch (TimeoutException e) {
f.cancel(true);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
service.shutdown();
}
}
@Override
public String getConfigId() {
return "RM1";
}
@Override
public void detectBetweenTags(Repository repository, String startTag, String endTag, RefactoringHandler handler)
throws Exception {
GitService gitService = new GitServiceImpl() {
@Override
public boolean isCommitAnalyzed(String sha1) {
return handler.skipCommit(sha1);
}
};
Iterable walk = gitService.createRevsWalkBetweenTags(repository, startTag, endTag);
detect(gitService, repository, handler, walk.iterator());
}
@Override
public void detectBetweenCommits(Repository repository, String startCommitId, String endCommitId,
RefactoringHandler handler) throws Exception {
GitService gitService = new GitServiceImpl() {
@Override
public boolean isCommitAnalyzed(String sha1) {
return handler.skipCommit(sha1);
}
};
Iterable walk = gitService.createRevsWalkBetweenCommits(repository, startCommitId, endCommitId);
detect(gitService, repository, handler, walk.iterator());
}
@Override
public void detectAtCommit(String gitURL, String commitId, RefactoringHandler handler, int timeout) {
ExecutorService service = Executors.newSingleThreadExecutor();
Future f = null;
try {
Runnable r = () -> detectRefactorings(handler, gitURL, commitId);
f = service.submit(r);
f.get(timeout, TimeUnit.SECONDS);
} catch (TimeoutException e) {
f.cancel(true);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
service.shutdown();
}
}
protected List detectRefactorings(final RefactoringHandler handler, String gitURL, String currentCommitId) {
List refactoringsAtRevision = Collections.emptyList();
try {
Set repositoryDirectoriesBefore = ConcurrentHashMap.newKeySet();
Set repositoryDirectoriesCurrent = ConcurrentHashMap.newKeySet();
Map fileContentsBefore = new ConcurrentHashMap();
Map fileContentsCurrent = new ConcurrentHashMap();
Map renamedFilesHint = new ConcurrentHashMap();
List commitFileNames = new ArrayList<>();
populateWithGitHubAPI(gitURL, currentCommitId, commitFileNames, fileContentsBefore, fileContentsCurrent, renamedFilesHint, repositoryDirectoriesBefore, repositoryDirectoriesCurrent);
Map filesBefore = new LinkedHashMap();
Map filesCurrent = new LinkedHashMap();
for(String fileName : commitFileNames) {
if(fileContentsBefore.containsKey(fileName)) {
filesBefore.put(fileName, fileContentsBefore.get(fileName));
}
if(fileContentsCurrent.containsKey(fileName)) {
filesCurrent.put(fileName, fileContentsCurrent.get(fileName));
}
}
fileContentsBefore = filesBefore;
fileContentsCurrent = filesCurrent;
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, renamedFilesHint, false);
UMLModel currentUMLModel = createModel(fileContentsCurrent, repositoryDirectoriesCurrent);
UMLModel parentUMLModel = createModel(fileContentsBefore, repositoryDirectoriesBefore);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
refactoringsAtRevision = modelDiff.getRefactorings();
refactoringsAtRevision.addAll(moveSourceFolderRefactorings);
refactoringsAtRevision = filter(refactoringsAtRevision);
handler.handle(currentCommitId, refactoringsAtRevision);
handler.handleModelDiff(currentCommitId, refactoringsAtRevision, modelDiff);
}
catch(RefactoringMinerTimedOutException e) {
logger.warn(String.format("Ignored revision %s due to timeout", currentCommitId), e);
handler.handleException(currentCommitId, e);
}
catch (Exception e) {
logger.warn(String.format("Ignored revision %s due to error", currentCommitId), e);
handler.handleException(currentCommitId, e);
}
return refactoringsAtRevision;
}
private void populateWithGitHubAPI(String cloneURL, String currentCommitId, List commitFileNames,
Map filesBefore, Map filesCurrent, Map renamedFilesHint,
Set repositoryDirectoriesBefore, Set repositoryDirectoriesCurrent) throws IOException, InterruptedException {
GHRepository repository = getGitHubRepository(cloneURL);
final String commitId = repository.queryCommits().from(currentCommitId).list().iterator().next().getSHA1();
logger.info("Processing {} {} ...", cloneURL, commitId);
List commitFiles = new ArrayList<>();
GHCommit currentCommit = new GHRepositoryWrapper(repository).getCommit(commitId, commitFiles);
//if parents.size() == 0 then currentCommit is the initial commit of the repository, but then all files will have an ADDED status
final String parentCommitId = currentCommit.getParents().size() > 0 ? currentCommit.getParents().get(0).getSHA1() : null;
Set deletedAndRenamedFileParentDirectories = ConcurrentHashMap.newKeySet();
ExecutorService pool = Executors.newFixedThreadPool(commitFiles.size());
for (GHCommit.File commitFile : commitFiles) {
String fileName = commitFile.getFileName();
if (commitFile.getFileName().endsWith(".java")) {
commitFileNames.add(fileName);
if (commitFile.getStatus().equals("modified")) {
Runnable r = () -> {
try {
String currentRawFile = null;
String parentRawFile = null;
if(repository.isPrivate()) {
InputStream currentRawFileInputStream = repository.getFileContent(fileName, currentCommitId).read();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
InputStream parentRawFileInputStream = repository.getFileContent(fileName, parentCommitId).read();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
else {
URL currentRawURL = commitFile.getRawUrl();
InputStream currentRawFileInputStream = currentRawURL.openStream();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
String rawURLInParentCommit = currentRawURL.toString().replace(commitId, parentCommitId);
InputStream parentRawFileInputStream = new URL(rawURLInParentCommit).openStream();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
filesBefore.put(fileName, parentRawFile);
filesCurrent.put(fileName, currentRawFile);
}
catch(IOException e) {
e.printStackTrace();
}
};
pool.submit(r);
}
else if (commitFile.getStatus().equals("added")) {
Runnable r = () -> {
try {
String currentRawFile = null;
if(repository.isPrivate()) {
InputStream currentRawFileInputStream = repository.getFileContent(fileName, currentCommitId).read();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
}
else {
URL currentRawURL = commitFile.getRawUrl();
InputStream currentRawFileInputStream = currentRawURL.openStream();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
}
filesCurrent.put(fileName, currentRawFile);
}
catch(IOException e) {
e.printStackTrace();
}
};
pool.submit(r);
}
else if (commitFile.getStatus().equals("removed")) {
Runnable r = () -> {
try {
String parentRawFile = null;
if(repository.isPrivate()) {
InputStream parentRawFileInputStream = repository.getFileContent(fileName, parentCommitId).read();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
else {
URL rawURL = commitFile.getRawUrl();
InputStream rawFileInputStream = rawURL.openStream();
parentRawFile = IOUtils.toString(rawFileInputStream);
}
filesBefore.put(fileName, parentRawFile);
if(fileName.contains("/")) {
deletedAndRenamedFileParentDirectories.add(fileName.substring(0, fileName.lastIndexOf("/")));
}
}
catch(IOException e) {
e.printStackTrace();
}
};
pool.submit(r);
}
else if (commitFile.getStatus().equals("renamed")) {
commitFileNames.add(commitFile.getPreviousFilename());
Runnable r = () -> {
try {
String previousFilename = commitFile.getPreviousFilename();
String currentRawFile = null;
String parentRawFile = null;
if(repository.isPrivate()) {
InputStream currentRawFileInputStream = repository.getFileContent(fileName, currentCommitId).read();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
InputStream parentRawFileInputStream = repository.getFileContent(previousFilename, parentCommitId).read();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
else {
URL currentRawURL = commitFile.getRawUrl();
InputStream currentRawFileInputStream = currentRawURL.openStream();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
String encodedFileName = URLEncoder.encode(fileName, StandardCharsets.UTF_8);
String encodedPreviousFilename = URLEncoder.encode(previousFilename, StandardCharsets.UTF_8);
String rawURLInParentCommit = currentRawURL.toString().replace(commitId, parentCommitId).replace(encodedFileName, encodedPreviousFilename);
InputStream parentRawFileInputStream = new URL(rawURLInParentCommit).openStream();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
filesBefore.put(previousFilename, parentRawFile);
filesCurrent.put(fileName, currentRawFile);
renamedFilesHint.put(previousFilename, fileName);
if(previousFilename.contains("/")) {
deletedAndRenamedFileParentDirectories.add(previousFilename.substring(0, previousFilename.lastIndexOf("/")));
}
}
catch(IOException e) {
e.printStackTrace();
}
};
pool.submit(r);
}
}
}
pool.shutdown();
pool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
repositoryDirectories(currentCommit.getTree(), "", repositoryDirectoriesCurrent, deletedAndRenamedFileParentDirectories);
repositoryDirectoriesCurrent.addAll(deletedAndRenamedFileParentDirectories);
//allRepositoryDirectories(currentCommit.getTree(), "", repositoryDirectoriesCurrent);
//GHCommit parentCommit = repository.getCommit(parentCommitId);
//allRepositoryDirectories(parentCommit.getTree(), "", repositoryDirectoriesBefore);
}
public void detectAtCommitWithGitHubAPI(String cloneURL, String commitId, File rootFolder, RefactoringHandler m) {
try {
List refactoringsAtRevision = Collections.emptyList();
Set repositoryDirectoriesBefore = ConcurrentHashMap.newKeySet();
Set repositoryDirectoriesCurrent = ConcurrentHashMap.newKeySet();
Map fileContentsBefore = new ConcurrentHashMap();
Map fileContentsCurrent = new ConcurrentHashMap();
Map renamedFilesHint = new ConcurrentHashMap();
ChangedFileInfo info = populateWithGitHubAPIAndSaveFiles(cloneURL, commitId,
fileContentsBefore, fileContentsCurrent, renamedFilesHint, repositoryDirectoriesBefore, repositoryDirectoriesCurrent, rootFolder);
Map filesBefore = new LinkedHashMap();
Map filesCurrent = new LinkedHashMap();
for(String fileName : info.getFilesBefore()) {
if(fileContentsBefore.containsKey(fileName)) {
filesBefore.put(fileName, fileContentsBefore.get(fileName));
}
}
for(String fileName : info.getFilesCurrent()) {
if(fileContentsCurrent.containsKey(fileName)) {
filesCurrent.put(fileName, fileContentsCurrent.get(fileName));
}
}
fileContentsBefore = filesBefore;
fileContentsCurrent = filesCurrent;
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, renamedFilesHint, false);
UMLModel currentUMLModel = createModel(fileContentsCurrent, repositoryDirectoriesCurrent);
UMLModel parentUMLModel = createModel(fileContentsBefore, repositoryDirectoriesBefore);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
refactoringsAtRevision = modelDiff.getRefactorings();
refactoringsAtRevision.addAll(moveSourceFolderRefactorings);
m.handle(commitId, refactoringsAtRevision);
m.handleModelDiff(commitId, refactoringsAtRevision, modelDiff);
} catch (Exception e) {
e.printStackTrace();
}
}
public UMLModelDiff detectAtCommitWithGitHubAPI(String cloneURL, String commitId, File rootFolder) {
try {
List refactoringsAtRevision = Collections.emptyList();
Set repositoryDirectoriesBefore = ConcurrentHashMap.newKeySet();
Set repositoryDirectoriesCurrent = ConcurrentHashMap.newKeySet();
Map fileContentsBefore = new ConcurrentHashMap();
Map fileContentsCurrent = new ConcurrentHashMap();
Map renamedFilesHint = new ConcurrentHashMap();
ChangedFileInfo info = populateWithGitHubAPIAndSaveFiles(cloneURL, commitId,
fileContentsBefore, fileContentsCurrent, renamedFilesHint, repositoryDirectoriesBefore, repositoryDirectoriesCurrent, rootFolder);
Map filesBefore = new LinkedHashMap();
Map filesCurrent = new LinkedHashMap();
for(String fileName : info.getFilesBefore()) {
if(fileContentsBefore.containsKey(fileName)) {
filesBefore.put(fileName, fileContentsBefore.get(fileName));
}
}
for(String fileName : info.getFilesCurrent()) {
if(fileContentsCurrent.containsKey(fileName)) {
filesCurrent.put(fileName, fileContentsCurrent.get(fileName));
}
}
fileContentsBefore = filesBefore;
fileContentsCurrent = filesCurrent;
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, renamedFilesHint, false);
UMLModel currentUMLModel = createModel(fileContentsCurrent, repositoryDirectoriesCurrent);
UMLModel parentUMLModel = createModel(fileContentsBefore, repositoryDirectoriesBefore);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
refactoringsAtRevision = modelDiff.getRefactorings();
refactoringsAtRevision.addAll(moveSourceFolderRefactorings);
return modelDiff;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static ChangedFileInfo populateWithLocalRepositoryAndSaveFiles(Repository repository, String currentCommitId,
Map filesBefore, Map filesCurrent, Map renamedFilesHint,
Set repositoryDirectoriesBefore, Set repositoryDirectoriesCurrent, File rootFolder) throws IOException {
String cloneURL = repository.getConfig().getString("remote", "origin", "url");
logger.info("Processing {} {} ...", cloneURL, currentCommitId);
String repoName = cloneURL.substring(cloneURL.lastIndexOf('/') + 1, cloneURL.lastIndexOf('.'));
String jsonFilePath = repoName + "-" + currentCommitId + ".json";
File jsonFile = new File(rootFolder, jsonFilePath);
if(jsonFile.exists()) {
final ObjectMapper mapper = new ObjectMapper();
ChangedFileInfo changedFileInfo = mapper.readValue(jsonFile, ChangedFileInfo.class);
String parentCommitId = changedFileInfo.getParentCommitId();
String commitId = changedFileInfo.getCurrentCommitId();
repositoryDirectoriesBefore.addAll(changedFileInfo.getRepositoryDirectoriesBefore());
repositoryDirectoriesCurrent.addAll(changedFileInfo.getRepositoryDirectoriesCurrent());
renamedFilesHint.putAll(changedFileInfo.getRenamedFilesHint());
for(String filePathBefore : changedFileInfo.getFilesBefore()) {
String fullPath = rootFolder + File.separator + repoName + "-" + parentCommitId + File.separator + filePathBefore.replaceAll("/", systemFileSeparator);
String contents = FileUtils.readFileToString(new File(fullPath));
filesBefore.put(filePathBefore, contents);
}
for(String filePathCurrent : changedFileInfo.getFilesCurrent()) {
String fullPath = rootFolder + File.separator + repoName + "-" + commitId + File.separator + filePathCurrent.replaceAll("/", systemFileSeparator);
String contents = FileUtils.readFileToString(new File(fullPath));
filesCurrent.put(filePathCurrent, contents);
}
return changedFileInfo;
}
RevWalk walk = new RevWalk(repository);
try {
RevCommit currentCommit = walk.parseCommit(repository.resolve(currentCommitId));
if (currentCommit.getParentCount() > 0) {
walk.parseCommit(currentCommit.getParent(0));
Set filePathsBefore = new LinkedHashSet();
Set filePathsCurrent = new LinkedHashSet();
new GitServiceImpl().fileTreeDiff(repository, currentCommit, filePathsBefore, filePathsCurrent, renamedFilesHint);
RevCommit parentCommit = currentCommit.getParent(0);
populateFileContentsAndSave(repository, parentCommit, filePathsBefore, filesBefore, repositoryDirectoriesBefore, rootFolder);
populateFileContentsAndSave(repository, currentCommit, filePathsCurrent, filesCurrent, repositoryDirectoriesCurrent, rootFolder);
String parentCommitId = parentCommit.getId().getName();
ChangedFileInfo changedFileInfo = new ChangedFileInfo(parentCommitId, currentCommitId,
new ArrayList<>(filePathsBefore), new ArrayList<>(filePathsCurrent), repositoryDirectoriesBefore, repositoryDirectoriesCurrent, renamedFilesHint);
final ObjectMapper mapper = new ObjectMapper();
mapper.writeValue(jsonFile, changedFileInfo);
walk.close();
return changedFileInfo;
}
else if(currentCommit.getParentCount() == 0) {
//initial commit of the repository
Set filePathsBefore = new LinkedHashSet();
Set filePathsCurrent = new LinkedHashSet();
new GitServiceImpl().fileTreeDiff(repository, currentCommit, filePathsBefore, filePathsCurrent, renamedFilesHint);
populateFileContentsAndSave(repository, currentCommit, filePathsCurrent, filesCurrent, repositoryDirectoriesCurrent, rootFolder);
String parentCommitId = "0";
ChangedFileInfo changedFileInfo = new ChangedFileInfo(parentCommitId, currentCommitId,
new ArrayList<>(filePathsBefore), new ArrayList<>(filePathsCurrent), repositoryDirectoriesBefore, repositoryDirectoriesCurrent, renamedFilesHint);
final ObjectMapper mapper = new ObjectMapper();
mapper.writeValue(jsonFile, changedFileInfo);
walk.close();
return changedFileInfo;
}
} catch (Exception e) {
logger.warn(String.format("Ignored revision %s due to error", currentCommitId), e);
}
return null;
}
public ChangedFileInfo populateWithGitHubAPIAndSaveFiles(String cloneURL, String currentCommitId,
Map filesBefore, Map filesCurrent, Map renamedFilesHint,
Set repositoryDirectoriesBefore, Set repositoryDirectoriesCurrent, File rootFolder) throws IOException, InterruptedException {
logger.info("Processing {} {} ...", cloneURL, currentCommitId);
String repoName = cloneURL.substring(cloneURL.lastIndexOf('/') + 1, cloneURL.lastIndexOf('.'));
String jsonFilePath = repoName + "-" + currentCommitId + ".json";
File jsonFile = new File(rootFolder, jsonFilePath);
if(jsonFile.exists()) {
final ObjectMapper mapper = new ObjectMapper();
ChangedFileInfo changedFileInfo = mapper.readValue(jsonFile, ChangedFileInfo.class);
String parentCommitId = changedFileInfo.getParentCommitId();
String commitId = changedFileInfo.getCurrentCommitId();
repositoryDirectoriesBefore.addAll(changedFileInfo.getRepositoryDirectoriesBefore());
repositoryDirectoriesCurrent.addAll(changedFileInfo.getRepositoryDirectoriesCurrent());
renamedFilesHint.putAll(changedFileInfo.getRenamedFilesHint());
for(String filePathBefore : changedFileInfo.getFilesBefore()) {
String fullPath = rootFolder + File.separator + repoName + "-" + parentCommitId + File.separator + filePathBefore.replaceAll("/", systemFileSeparator);
String contents = FileUtils.readFileToString(new File(fullPath));
filesBefore.put(filePathBefore, contents);
}
for(String filePathCurrent : changedFileInfo.getFilesCurrent()) {
String fullPath = rootFolder + File.separator + repoName + "-" + commitId + File.separator + filePathCurrent.replaceAll("/", systemFileSeparator);
String contents = FileUtils.readFileToString(new File(fullPath));
filesCurrent.put(filePathCurrent, contents);
}
return changedFileInfo;
}
GHRepository repository = getGitHubRepository(cloneURL);
final String commitId = repository.queryCommits().from(currentCommitId).list().iterator().next().getSHA1();
List commitFiles = new ArrayList<>();
GHCommit currentCommit = new GHRepositoryWrapper(repository).getCommit(commitId, commitFiles);
//if parents.size() == 0 then currentCommit is the initial commit of the repository, but then all files will have an ADDED status
final String parentCommitId = currentCommit.getParents().size() > 0 ? currentCommit.getParents().get(0).getSHA1() : null;
Set deletedAndRenamedFileParentDirectories = ConcurrentHashMap.newKeySet();
List commitFileNames = new ArrayList<>();
ExecutorService pool = Executors.newFixedThreadPool(commitFiles.size());
for (GHCommit.File commitFile : commitFiles) {
String fileName = commitFile.getFileName();
if (commitFile.getFileName().endsWith(".java")) {
commitFileNames.add(fileName);
if (commitFile.getStatus().equals("modified")) {
Runnable r = () -> {
try {
String currentRawFile = null;
String parentRawFile = null;
if(repository.isPrivate()) {
InputStream currentRawFileInputStream = repository.getFileContent(fileName, currentCommitId).read();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
InputStream parentRawFileInputStream = repository.getFileContent(fileName, parentCommitId).read();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
else {
URL currentRawURL = commitFile.getRawUrl();
InputStream currentRawFileInputStream = currentRawURL.openStream();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
String rawURLInParentCommit = currentRawURL.toString().replace(commitId, parentCommitId);
InputStream parentRawFileInputStream = new URL(rawURLInParentCommit).openStream();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
filesBefore.put(fileName, parentRawFile);
filesCurrent.put(fileName, currentRawFile);
File parentFilePath = new File(rootFolder, repoName + "-" + parentCommitId + "/" + fileName);
FileUtils.writeStringToFile(parentFilePath, parentRawFile);
File currentFilePath = new File(rootFolder, repoName + "-" + currentCommitId + "/" + fileName);
FileUtils.writeStringToFile(currentFilePath, currentRawFile);
}
catch(IOException e) {
e.printStackTrace();
}
};
pool.submit(r);
}
else if (commitFile.getStatus().equals("added")) {
Runnable r = () -> {
try {
String currentRawFile = null;
if(repository.isPrivate()) {
InputStream currentRawFileInputStream = repository.getFileContent(fileName, currentCommitId).read();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
}
else {
URL currentRawURL = commitFile.getRawUrl();
InputStream currentRawFileInputStream = currentRawURL.openStream();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
}
filesCurrent.put(fileName, currentRawFile);
File currentFilePath = new File(rootFolder, repoName + "-" + currentCommitId + "/" + fileName);
FileUtils.writeStringToFile(currentFilePath, currentRawFile);
}
catch(IOException e) {
e.printStackTrace();
}
};
pool.submit(r);
}
else if (commitFile.getStatus().equals("removed")) {
Runnable r = () -> {
try {
String parentRawFile = null;
if(repository.isPrivate()) {
InputStream parentRawFileInputStream = repository.getFileContent(fileName, parentCommitId).read();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
else {
URL rawURL = commitFile.getRawUrl();
InputStream rawFileInputStream = rawURL.openStream();
parentRawFile = IOUtils.toString(rawFileInputStream);
}
filesBefore.put(fileName, parentRawFile);
if(fileName.contains("/")) {
deletedAndRenamedFileParentDirectories.add(fileName.substring(0, fileName.lastIndexOf("/")));
}
File parentFilePath = new File(rootFolder, repoName + "-" + parentCommitId + "/" + fileName);
FileUtils.writeStringToFile(parentFilePath, parentRawFile);
}
catch(IOException e) {
e.printStackTrace();
}
};
pool.submit(r);
}
else if (commitFile.getStatus().equals("renamed")) {
commitFileNames.add(commitFile.getPreviousFilename());
Runnable r = () -> {
try {
String previousFilename = commitFile.getPreviousFilename();
String currentRawFile = null;
String parentRawFile = null;
if(repository.isPrivate()) {
InputStream currentRawFileInputStream = repository.getFileContent(fileName, currentCommitId).read();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
InputStream parentRawFileInputStream = repository.getFileContent(previousFilename, parentCommitId).read();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
else {
URL currentRawURL = commitFile.getRawUrl();
InputStream currentRawFileInputStream = currentRawURL.openStream();
currentRawFile = IOUtils.toString(currentRawFileInputStream);
String encodedFileName = URLEncoder.encode(fileName, StandardCharsets.UTF_8);
String encodedPreviousFilename = URLEncoder.encode(previousFilename, StandardCharsets.UTF_8);
String rawURLInParentCommit = currentRawURL.toString().replace(commitId, parentCommitId).replace(encodedFileName, encodedPreviousFilename);
InputStream parentRawFileInputStream = new URL(rawURLInParentCommit).openStream();
parentRawFile = IOUtils.toString(parentRawFileInputStream);
}
filesBefore.put(previousFilename, parentRawFile);
filesCurrent.put(fileName, currentRawFile);
renamedFilesHint.put(previousFilename, fileName);
if(previousFilename.contains("/")) {
deletedAndRenamedFileParentDirectories.add(previousFilename.substring(0, previousFilename.lastIndexOf("/")));
}
File parentFilePath = new File(rootFolder, repoName + "-" + parentCommitId + "/" + previousFilename);
FileUtils.writeStringToFile(parentFilePath, parentRawFile);
File currentFilePath = new File(rootFolder, repoName + "-" + currentCommitId + "/" + fileName);
FileUtils.writeStringToFile(currentFilePath, currentRawFile);
}
catch(IOException e) {
e.printStackTrace();
}
};
pool.submit(r);
}
}
}
pool.shutdown();
pool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
List orderedFilesBefore = new ArrayList<>();
List orderedFilesCurrent = new ArrayList<>();
for(String fileName : commitFileNames) {
if(filesBefore.containsKey(fileName)) {
orderedFilesBefore.add(fileName);
}
if(filesCurrent.containsKey(fileName)) {
orderedFilesCurrent.add(fileName);
}
}
repositoryDirectories(currentCommit.getTree(), "", repositoryDirectoriesCurrent, new LinkedHashSet<>(orderedFilesCurrent));
//repositoryDirectoriesCurrent.addAll(deletedAndRenamedFileParentDirectories);
//allRepositoryDirectories(currentCommit.getTree(), "", repositoryDirectoriesCurrent);
if(parentCommitId != null) {
GHCommit parentCommit = repository.getCommit(parentCommitId);
repositoryDirectories(parentCommit.getTree(), "", repositoryDirectoriesBefore, new LinkedHashSet<>(orderedFilesBefore));
}
ChangedFileInfo changedFileInfo = new ChangedFileInfo(parentCommitId, commitId, orderedFilesBefore, orderedFilesCurrent, repositoryDirectoriesBefore, repositoryDirectoriesCurrent, renamedFilesHint);
final ObjectMapper mapper = new ObjectMapper();
mapper.writeValue(jsonFile, changedFileInfo);
return changedFileInfo;
}
private void repositoryDirectories(GHTree tree, String pathFromRoot, Set repositoryDirectories, Set targetPaths) throws IOException {
for(GHTreeEntry entry : tree.getTree()) {
String path = null;
if(pathFromRoot.equals("")) {
path = entry.getPath();
}
else {
path = pathFromRoot + "/" + entry.getPath();
}
if(atLeastOneStartsWith(targetPaths, path)) {
if(targetPaths.contains(path)) {
repositoryDirectories.add(path);
}
else {
repositoryDirectories.add(path);
GHTree asTree = entry.asTree();
if(asTree != null) {
repositoryDirectories(asTree, path, repositoryDirectories, targetPaths);
}
}
}
}
}
private boolean atLeastOneStartsWith(Set targetPaths, String path) {
for(String targetPath : targetPaths) {
if(path.endsWith("/") && targetPath.startsWith(path)) {
return true;
}
else if(!path.endsWith("/") && targetPath.startsWith(path + "/")) {
return true;
}
}
return false;
}
/*
private void allRepositoryDirectories(GHTree tree, String pathFromRoot, Set repositoryDirectories) throws IOException {
for(GHTreeEntry entry : tree.getTree()) {
String path = null;
if(pathFromRoot.equals("")) {
path = entry.getPath();
}
else {
path = pathFromRoot + "/" + entry.getPath();
}
GHTree asTree = entry.asTree();
if(asTree != null) {
allRepositoryDirectories(asTree, path, repositoryDirectories);
}
else if(path.endsWith(".java")) {
repositoryDirectories.add(path.substring(0, path.lastIndexOf("/")));
}
}
}
*/
@Override
public void detectAtPullRequest(String cloneURL, int pullRequestId, RefactoringHandler handler, int timeout) throws IOException {
GHRepository repository = getGitHubRepository(cloneURL);
GHPullRequest pullRequest = repository.getPullRequest(pullRequestId);
PagedIterable commits = pullRequest.listCommits();
for(GHPullRequestCommitDetail commit : commits) {
detectAtCommit(cloneURL, commit.getSha(), handler, timeout);
}
}
public GHRepository getGitHubRepository(String cloneURL) throws IOException {
GitHub gitHub = connectToGitHub();
String repoName = extractRepositoryName(cloneURL);
return gitHub.getRepository(repoName);
}
private static final String GITHUB_URL = "https://github.com/";
private static final String BITBUCKET_URL = "https://bitbucket.org/";
private static String extractRepositoryName(String cloneURL) {
int hostLength = 0;
if(cloneURL.startsWith(GITHUB_URL)) {
hostLength = GITHUB_URL.length();
}
else if(cloneURL.startsWith(BITBUCKET_URL)) {
hostLength = BITBUCKET_URL.length();
}
int indexOfDotGit = cloneURL.length();
if(cloneURL.endsWith(".git")) {
indexOfDotGit = cloneURL.indexOf(".git");
}
else if(cloneURL.endsWith("/")) {
indexOfDotGit = cloneURL.length() - 1;
}
String repoName = cloneURL.substring(hostLength, indexOfDotGit);
return repoName;
}
public static String extractCommitURL(String cloneURL, String commitId) {
int indexOfDotGit = cloneURL.length();
if(cloneURL.endsWith(".git")) {
indexOfDotGit = cloneURL.indexOf(".git");
}
else if(cloneURL.endsWith("/")) {
indexOfDotGit = cloneURL.length() - 1;
}
String commitResource = "/";
if(cloneURL.startsWith(GITHUB_URL)) {
commitResource = "/commit/";
}
else if(cloneURL.startsWith(BITBUCKET_URL)) {
commitResource = "/commits/";
}
String commitURL = cloneURL.substring(0, indexOfDotGit) + commitResource + commitId;
return commitURL;
}
private static String extractDownloadLink(String cloneURL, String commitId) {
int indexOfDotGit = cloneURL.length();
if(cloneURL.endsWith(".git")) {
indexOfDotGit = cloneURL.indexOf(".git");
}
else if(cloneURL.endsWith("/")) {
indexOfDotGit = cloneURL.length() - 1;
}
String downloadResource = "/";
if(cloneURL.startsWith(GITHUB_URL)) {
downloadResource = "/archive/";
}
else if(cloneURL.startsWith(BITBUCKET_URL)) {
downloadResource = "/get/";
}
String downloadLink = cloneURL.substring(0, indexOfDotGit) + downloadResource + commitId + ".zip";
return downloadLink;
}
@Override
public ProjectASTDiff diffAtCommit(Repository repository, String commitId) {
String cloneURL = repository.getConfig().getString("remote", "origin", "url");
File metadataFolder = repository.getDirectory();
File projectFolder = metadataFolder.getParentFile();
GitService gitService = new GitServiceImpl();
RevWalk walk = new RevWalk(repository);
try {
RevCommit currentCommit = walk.parseCommit(repository.resolve(commitId));
if (currentCommit.getParentCount() > 0) {
walk.parseCommit(currentCommit.getParent(0));
Set filePathsBefore = new LinkedHashSet();
Set filePathsCurrent = new LinkedHashSet();
Map renamedFilesHint = new HashMap();
gitService.fileTreeDiff(repository, currentCommit, filePathsBefore, filePathsCurrent, renamedFilesHint);
Set repositoryDirectoriesBefore = new LinkedHashSet();
Set repositoryDirectoriesCurrent = new LinkedHashSet();
Map fileContentsBefore = new LinkedHashMap();
Map fileContentsCurrent = new LinkedHashMap();
// If no java files changed, there is no refactoring. Also, if there are
// only ADD's or only REMOVE's there is no refactoring
if (!filePathsBefore.isEmpty() && !filePathsCurrent.isEmpty() && currentCommit.getParentCount() > 0) {
RevCommit parentCommit = currentCommit.getParent(0);
populateFileContents(repository, parentCommit, filePathsBefore, fileContentsBefore, repositoryDirectoriesBefore);
populateFileContents(repository, currentCommit, filePathsCurrent, fileContentsCurrent, repositoryDirectoriesCurrent);
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, renamedFilesHint, true);
UMLModel parentUMLModel = createModelForASTDiff(fileContentsBefore, repositoryDirectoriesBefore);
UMLModel currentUMLModel = createModelForASTDiff(fileContentsCurrent, repositoryDirectoriesCurrent);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
ProjectASTDiffer differ = new ProjectASTDiffer(modelDiff, fileContentsBefore, fileContentsCurrent);
return differ.getProjectASTDiff();
}
else if (currentCommit.getParentCount() == 0) {
//initial commit of the repository
populateFileContents(repository, currentCommit, filePathsCurrent, fileContentsCurrent, repositoryDirectoriesCurrent);
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, renamedFilesHint, true);
UMLModel parentUMLModel = createModelForASTDiff(fileContentsBefore, repositoryDirectoriesBefore);
UMLModel currentUMLModel = createModelForASTDiff(fileContentsCurrent, repositoryDirectoriesCurrent);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
ProjectASTDiffer differ = new ProjectASTDiffer(modelDiff, fileContentsBefore, fileContentsCurrent);
return differ.getProjectASTDiff();
}
}
else {
logger.warn(String.format("Ignored revision %s because it has no parent", commitId));
}
} catch (MissingObjectException moe) {
try {
ChangedFileInfo changedFileInfo = populateWithGitHubAPI(projectFolder, cloneURL, commitId);
String parentCommitId = changedFileInfo.getParentCommitId();
List filesBefore = changedFileInfo.getFilesBefore();
List filesCurrent = changedFileInfo.getFilesCurrent();
Map renamedFilesHint = changedFileInfo.getRenamedFilesHint();
File currentFolder = new File(projectFolder.getParentFile(), projectFolder.getName() + "-" + commitId);
File parentFolder = new File(projectFolder.getParentFile(), projectFolder.getName() + "-" + parentCommitId);
if (!currentFolder.exists()) {
downloadAndExtractZipFile(projectFolder, cloneURL, commitId);
}
if (!parentFolder.exists()) {
downloadAndExtractZipFile(projectFolder, cloneURL, parentCommitId);
}
Set repositoryDirectoriesBefore = new LinkedHashSet();
Set repositoryDirectoriesCurrent = new LinkedHashSet();
Map fileContentsBefore = new LinkedHashMap();
Map fileContentsCurrent = new LinkedHashMap();
if (currentFolder.exists() && parentFolder.exists()) {
populateFileContents(currentFolder, filesCurrent, fileContentsCurrent, repositoryDirectoriesCurrent);
populateFileContents(parentFolder, filesBefore, fileContentsBefore, repositoryDirectoriesBefore);
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, renamedFilesHint, true);
UMLModel parentUMLModel = createModelForASTDiff(fileContentsBefore, repositoryDirectoriesBefore);
UMLModel currentUMLModel = createModelForASTDiff(fileContentsCurrent, repositoryDirectoriesCurrent);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
ProjectASTDiffer differ = new ProjectASTDiffer(modelDiff, fileContentsBefore, fileContentsCurrent);
return differ.getProjectASTDiff();
}
} catch (Exception e) {
logger.warn(String.format("Ignored revision %s due to error", commitId), e);
}
} catch (RefactoringMinerTimedOutException e) {
logger.warn(String.format("Ignored revision %s due to timeout", commitId), e);
} catch (Exception e) {
logger.warn(String.format("Ignored revision %s due to error", commitId), e);
} finally {
walk.close();
walk.dispose();
}
return null;
}
public ProjectASTDiff diffAtCommitWithGitHubAPI(String cloneURL, String commitId, File rootFolder) {
try {
Set repositoryDirectoriesBefore = ConcurrentHashMap.newKeySet();
Set repositoryDirectoriesCurrent = ConcurrentHashMap.newKeySet();
Map fileContentsBefore = new ConcurrentHashMap();
Map fileContentsCurrent = new ConcurrentHashMap();
Map renamedFilesHint = new ConcurrentHashMap();
ChangedFileInfo info = populateWithGitHubAPIAndSaveFiles(cloneURL, commitId,
fileContentsBefore, fileContentsCurrent, renamedFilesHint, repositoryDirectoriesBefore, repositoryDirectoriesCurrent, rootFolder);
Map filesBefore = new LinkedHashMap();
Map filesCurrent = new LinkedHashMap();
for(String fileName : info.getFilesBefore()) {
if(fileContentsBefore.containsKey(fileName)) {
filesBefore.put(fileName, fileContentsBefore.get(fileName));
}
}
for(String fileName : info.getFilesCurrent()) {
if(fileContentsCurrent.containsKey(fileName)) {
filesCurrent.put(fileName, fileContentsCurrent.get(fileName));
}
}
fileContentsBefore = filesBefore;
fileContentsCurrent = filesCurrent;
List moveSourceFolderRefactorings = processIdenticalFiles(fileContentsBefore, fileContentsCurrent, renamedFilesHint, true);
UMLModel currentUMLModel = createModelForASTDiff(fileContentsCurrent, repositoryDirectoriesCurrent);
UMLModel parentUMLModel = createModelForASTDiff(fileContentsBefore, repositoryDirectoriesBefore);
UMLModelDiff modelDiff = parentUMLModel.diff(currentUMLModel);
ProjectASTDiffer differ = new ProjectASTDiffer(modelDiff, fileContentsBefore, fileContentsCurrent);
return differ.getProjectASTDiff();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public ProjectASTDiff diffAtPullRequest(String cloneURL, int pullRequestId, int timeout) throws Exception {
GHRepository repository = getGitHubRepository(cloneURL);
GHPullRequest pullRequest = repository.getPullRequest(pullRequestId);
PagedIterable