From f66e89662c091e082bd1d2feb6ac91513ccff273 Mon Sep 17 00:00:00 2001
From: Rafael Cavazin <rafaelcavazin@gmail.com>
Date: Sun, 21 Jul 2013 09:59:00 -0400
Subject: [PATCH] Merge branch 'master' of https://github.com/gitblit/gitblit
---
src/main/java/com/gitblit/utils/DiffUtils.java | 282 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 282 insertions(+), 0 deletions(-)
diff --git a/src/main/java/com/gitblit/utils/DiffUtils.java b/src/main/java/com/gitblit/utils/DiffUtils.java
new file mode 100644
index 0000000..67871d2
--- /dev/null
+++ b/src/main/java/com/gitblit/utils/DiffUtils.java
@@ -0,0 +1,282 @@
+/*
+ * Copyright 2011 gitblit.com.
+ *
+ * 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.gitblit.utils;
+
+import java.io.ByteArrayOutputStream;
+import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.jgit.api.BlameCommand;
+import org.eclipse.jgit.blame.BlameResult;
+import org.eclipse.jgit.diff.DiffEntry;
+import org.eclipse.jgit.diff.DiffFormatter;
+import org.eclipse.jgit.diff.RawText;
+import org.eclipse.jgit.diff.RawTextComparator;
+import org.eclipse.jgit.lib.ObjectId;
+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.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.gitblit.models.AnnotatedLine;
+
+/**
+ * DiffUtils is a class of utility methods related to diff, patch, and blame.
+ *
+ * The diff methods support pluggable diff output types like Gitblit, Gitweb,
+ * and Plain.
+ *
+ * @author James Moger
+ *
+ */
+public class DiffUtils {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(DiffUtils.class);
+
+ /**
+ * Enumeration for the diff output types.
+ */
+ public static enum DiffOutputType {
+ PLAIN, GITWEB, GITBLIT;
+
+ public static DiffOutputType forName(String name) {
+ for (DiffOutputType type : values()) {
+ if (type.name().equalsIgnoreCase(name)) {
+ return type;
+ }
+ }
+ return null;
+ }
+ }
+
+ /**
+ * Returns the complete diff of the specified commit compared to its primary
+ * parent.
+ *
+ * @param repository
+ * @param commit
+ * @param outputType
+ * @return the diff as a string
+ */
+ public static String getCommitDiff(Repository repository, RevCommit commit,
+ DiffOutputType outputType) {
+ return getDiff(repository, null, commit, null, outputType);
+ }
+
+ /**
+ * Returns the diff for the specified file or folder from the specified
+ * commit compared to its primary parent.
+ *
+ * @param repository
+ * @param commit
+ * @param path
+ * @param outputType
+ * @return the diff as a string
+ */
+ public static String getDiff(Repository repository, RevCommit commit, String path,
+ DiffOutputType outputType) {
+ return getDiff(repository, null, commit, path, outputType);
+ }
+
+ /**
+ * Returns the complete diff between the two specified commits.
+ *
+ * @param repository
+ * @param baseCommit
+ * @param commit
+ * @param outputType
+ * @return the diff as a string
+ */
+ public static String getDiff(Repository repository, RevCommit baseCommit, RevCommit commit,
+ DiffOutputType outputType) {
+ return getDiff(repository, baseCommit, commit, null, outputType);
+ }
+
+ /**
+ * Returns the diff between two commits for the specified file.
+ *
+ * @param repository
+ * @param baseCommit
+ * if base commit is null the diff is to the primary parent of
+ * the commit.
+ * @param commit
+ * @param path
+ * if the path is specified, the diff is restricted to that file
+ * or folder. if unspecified, the diff is for the entire commit.
+ * @param outputType
+ * @return the diff as a string
+ */
+ public static String getDiff(Repository repository, RevCommit baseCommit, RevCommit commit,
+ String path, DiffOutputType outputType) {
+ String diff = null;
+ try {
+ final ByteArrayOutputStream os = new ByteArrayOutputStream();
+ RawTextComparator cmp = RawTextComparator.DEFAULT;
+ DiffFormatter df;
+ switch (outputType) {
+ case GITWEB:
+ df = new GitWebDiffFormatter(os);
+ break;
+ case GITBLIT:
+ df = new GitBlitDiffFormatter(os);
+ break;
+ case PLAIN:
+ default:
+ df = new DiffFormatter(os);
+ break;
+ }
+ df.setRepository(repository);
+ df.setDiffComparator(cmp);
+ df.setDetectRenames(true);
+
+ RevTree commitTree = commit.getTree();
+ RevTree baseTree;
+ if (baseCommit == null) {
+ if (commit.getParentCount() > 0) {
+ final RevWalk rw = new RevWalk(repository);
+ RevCommit parent = rw.parseCommit(commit.getParent(0).getId());
+ rw.dispose();
+ baseTree = parent.getTree();
+ } else {
+ // FIXME initial commit. no parent?!
+ baseTree = commitTree;
+ }
+ } else {
+ baseTree = baseCommit.getTree();
+ }
+
+ List<DiffEntry> diffEntries = df.scan(baseTree, commitTree);
+ if (path != null && path.length() > 0) {
+ for (DiffEntry diffEntry : diffEntries) {
+ if (diffEntry.getNewPath().equalsIgnoreCase(path)) {
+ df.format(diffEntry);
+ break;
+ }
+ }
+ } else {
+ df.format(diffEntries);
+ }
+ if (df instanceof GitWebDiffFormatter) {
+ // workaround for complex private methods in DiffFormatter
+ diff = ((GitWebDiffFormatter) df).getHtml();
+ } else {
+ diff = os.toString();
+ }
+ df.flush();
+ } catch (Throwable t) {
+ LOGGER.error("failed to generate commit diff!", t);
+ }
+ return diff;
+ }
+
+ /**
+ * Returns the diff between the two commits for the specified file or folder
+ * formatted as a patch.
+ *
+ * @param repository
+ * @param baseCommit
+ * if base commit is unspecified, the patch is generated against
+ * the primary parent of the specified commit.
+ * @param commit
+ * @param path
+ * if path is specified, the patch is generated only for the
+ * specified file or folder. if unspecified, the patch is
+ * generated for the entire diff between the two commits.
+ * @return patch as a string
+ */
+ public static String getCommitPatch(Repository repository, RevCommit baseCommit,
+ RevCommit commit, String path) {
+ String diff = null;
+ try {
+ final ByteArrayOutputStream os = new ByteArrayOutputStream();
+ RawTextComparator cmp = RawTextComparator.DEFAULT;
+ PatchFormatter df = new PatchFormatter(os);
+ df.setRepository(repository);
+ df.setDiffComparator(cmp);
+ df.setDetectRenames(true);
+
+ RevTree commitTree = commit.getTree();
+ RevTree baseTree;
+ if (baseCommit == null) {
+ if (commit.getParentCount() > 0) {
+ final RevWalk rw = new RevWalk(repository);
+ RevCommit parent = rw.parseCommit(commit.getParent(0).getId());
+ baseTree = parent.getTree();
+ } else {
+ // FIXME initial commit. no parent?!
+ baseTree = commitTree;
+ }
+ } else {
+ baseTree = baseCommit.getTree();
+ }
+
+ List<DiffEntry> diffEntries = df.scan(baseTree, commitTree);
+ if (path != null && path.length() > 0) {
+ for (DiffEntry diffEntry : diffEntries) {
+ if (diffEntry.getNewPath().equalsIgnoreCase(path)) {
+ df.format(diffEntry);
+ break;
+ }
+ }
+ } else {
+ df.format(diffEntries);
+ }
+ diff = df.getPatch(commit);
+ df.flush();
+ } catch (Throwable t) {
+ LOGGER.error("failed to generate commit diff!", t);
+ }
+ return diff;
+ }
+
+ /**
+ * Returns the list of lines in the specified source file annotated with the
+ * source commit metadata.
+ *
+ * @param repository
+ * @param blobPath
+ * @param objectId
+ * @return list of annotated lines
+ */
+ public static List<AnnotatedLine> blame(Repository repository, String blobPath, String objectId) {
+ List<AnnotatedLine> lines = new ArrayList<AnnotatedLine>();
+ try {
+ ObjectId object;
+ if (StringUtils.isEmpty(objectId)) {
+ object = JGitUtils.getDefaultBranch(repository);
+ } else {
+ object = repository.resolve(objectId);
+ }
+ BlameCommand blameCommand = new BlameCommand(repository);
+ blameCommand.setFilePath(blobPath);
+ blameCommand.setStartCommit(object);
+ BlameResult blameResult = blameCommand.call();
+ RawText rawText = blameResult.getResultContents();
+ int length = rawText.size();
+ for (int i = 0; i < length; i++) {
+ RevCommit commit = blameResult.getSourceCommit(i);
+ AnnotatedLine line = new AnnotatedLine(commit, i + 1, rawText.getString(i));
+ lines.add(line);
+ }
+ } catch (Throwable t) {
+ LOGGER.error(MessageFormat.format("failed to generate blame for {0} {1}!", blobPath, objectId), t);
+ }
+ return lines;
+ }
+}
--
Gitblit v1.9.1