| /* |
| * Copyright (C) 2010, Robin Rosenberg |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package org.eclipse.jgit.util; |
| |
| import java.io.IOException; |
| import java.util.regex.Pattern; |
| |
| import org.eclipse.jgit.lib.Constants; |
| import org.eclipse.jgit.lib.ObjectInserter; |
| import org.eclipse.jgit.lib.ObjectId; |
| import org.eclipse.jgit.lib.PersonIdent; |
| |
| /** |
| * Utilities for creating and working with Change-Id's, like the one used by |
| * Gerrit Code Review. |
| * <p> |
| * A Change-Id is a SHA-1 computed from the content of a commit, in a similar |
| * fashion to how the commit id is computed. Unlike the commit id a Change-Id is |
| * retained in the commit and subsequent revised commits in the footer of the |
| * commit text. |
| */ |
| public class ChangeIdUtil { |
| |
| static final String CHANGE_ID = "Change-Id:"; |
| |
| // package-private so the unit test can test this part only |
| static String clean(String msg) { |
| return msg.// |
| replaceAll("(?i)(?m)^Signed-off-by:.*$\n?", "").// |
| replaceAll("(?m)^#.*$\n?", "").// |
| replaceAll("(?m)\n\n\n+", "\\\n").// |
| replaceAll("\\n*$", "").// |
| replaceAll("(?s)\ndiff --git.*", "").// |
| trim(); |
| } |
| |
| /** |
| * Compute a Change-Id. |
| * |
| * @param treeId |
| * The id of the tree that would be committed |
| * @param firstParentId |
| * parent id of previous commit or null |
| * @param author |
| * the {@link PersonIdent} for the presumed author and time |
| * @param committer |
| * the {@link PersonIdent} for the presumed committer and time |
| * @param message |
| * The commit message |
| * @return the change id SHA1 string (without the 'I') or null if the |
| * message is not complete enough |
| * @throws IOException |
| */ |
| public static ObjectId computeChangeId(final ObjectId treeId, |
| final ObjectId firstParentId, final PersonIdent author, |
| final PersonIdent committer, final String message) |
| throws IOException { |
| String cleanMessage = clean(message); |
| if (cleanMessage.length() == 0) |
| return null; |
| StringBuilder b = new StringBuilder(); |
| b.append("tree "); |
| b.append(ObjectId.toString(treeId)); |
| b.append("\n"); |
| if (firstParentId != null) { |
| b.append("parent "); |
| b.append(ObjectId.toString(firstParentId)); |
| b.append("\n"); |
| } |
| b.append("author "); |
| b.append(author.toExternalString()); |
| b.append("\n"); |
| b.append("committer "); |
| b.append(committer.toExternalString()); |
| b.append("\n\n"); |
| b.append(cleanMessage); |
| return new ObjectInserter.Formatter().idFor(Constants.OBJ_COMMIT, // |
| b.toString().getBytes(Constants.CHARACTER_ENCODING)); |
| } |
| |
| private static final Pattern issuePattern = Pattern |
| .compile("^(Bug|Issue)[a-zA-Z0-9-]*:.*$"); |
| |
| private static final Pattern footerPattern = Pattern |
| .compile("(^[a-zA-Z0-9-]+:(?!//).*$)"); |
| |
| private static final Pattern includeInFooterPattern = Pattern |
| .compile("^[ \\[].*$"); |
| |
| /** |
| * Find the right place to insert a Change-Id and return it. |
| * <p> |
| * The Change-Id is inserted before the first footer line but after a Bug |
| * line. |
| * |
| * @param message |
| * @param changeId |
| * @return a commit message with an inserted Change-Id line |
| */ |
| public static String insertId(String message, ObjectId changeId) { |
| return insertId(message, changeId, false); |
| } |
| |
| /** |
| * Find the right place to insert a Change-Id and return it. |
| * <p> |
| * If no Change-Id is found the Change-Id is inserted before |
| * the first footer line but after a Bug line. |
| * |
| * If Change-Id is found and replaceExisting is set to false, |
| * the message is unchanged. |
| * |
| * If Change-Id is found and replaceExisting is set to true, |
| * the Change-Id is replaced with {@code changeId}. |
| * |
| * @param message |
| * @param changeId |
| * @param replaceExisting |
| * @return a commit message with an inserted Change-Id line |
| */ |
| public static String insertId(String message, ObjectId changeId, |
| boolean replaceExisting) { |
| if (message.indexOf(CHANGE_ID) > 0) { |
| if (replaceExisting) { |
| int i = message.indexOf(CHANGE_ID) + 10; |
| while (message.charAt(i) == ' ') |
| i++; |
| String oldId = message.length() == (i + 40) ? |
| message.substring(i) : message.substring(i, i + 41); |
| message = message.replace(oldId, "I" + changeId.getName()); |
| } |
| return message; |
| } |
| |
| String[] lines = message.split("\n"); |
| int footerFirstLine = lines.length; |
| for (int i = lines.length - 1; i > 1; --i) { |
| if (footerPattern.matcher(lines[i]).matches()) { |
| footerFirstLine = i; |
| continue; |
| } |
| if (footerFirstLine != lines.length && lines[i].length() == 0) { |
| break; |
| } |
| if (footerFirstLine != lines.length |
| && includeInFooterPattern.matcher(lines[i]).matches()) { |
| footerFirstLine = i + 1; |
| continue; |
| } |
| footerFirstLine = lines.length; |
| break; |
| } |
| int insertAfter = footerFirstLine; |
| for (int i = footerFirstLine; i < lines.length; ++i) { |
| if (issuePattern.matcher(lines[i]).matches()) { |
| insertAfter = i + 1; |
| continue; |
| } |
| break; |
| } |
| StringBuilder ret = new StringBuilder(); |
| int i = 0; |
| for (; i < insertAfter; ++i) { |
| ret.append(lines[i]); |
| ret.append("\n"); |
| } |
| if (insertAfter == lines.length && insertAfter == footerFirstLine) |
| ret.append("\n"); |
| ret.append(CHANGE_ID); |
| ret.append(" I"); |
| ret.append(ObjectId.toString(changeId)); |
| ret.append("\n"); |
| for (; i < lines.length; ++i) { |
| ret.append(lines[i]); |
| ret.append("\n"); |
| } |
| return ret.toString(); |
| } |
| } |