aboutsummaryrefslogtreecommitdiffstats
path: root/org.eclipse.jgit/src/org/eclipse/jgit/merge/MergeMessageFormatter.java
blob: f7966a267f43f4d2db1946f408dc651942d0a909 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/*
 * Copyright (C) 2010-2012, Robin Stocker <robin@nibor.org> and others
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0 which is available at
 * https://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
package org.eclipse.jgit.merge;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.util.ChangeIdUtil;
import org.eclipse.jgit.util.StringUtils;

/**
 * Formatter for constructing the commit message for a merge commit.
 * <p>
 * The format should be the same as C Git does it, for compatibility.
 */
public class MergeMessageFormatter {
	/**
	 * Construct the merge commit message.
	 *
	 * @param refsToMerge
	 *            the refs which will be merged
	 * @param target
	 *            the branch ref which will be merged into
	 * @return merge commit message
	 */
	public String format(List<Ref> refsToMerge, Ref target) {
		StringBuilder sb = new StringBuilder();
		sb.append("Merge "); //$NON-NLS-1$

		List<String> branches = new ArrayList<>();
		List<String> remoteBranches = new ArrayList<>();
		List<String> tags = new ArrayList<>();
		List<String> commits = new ArrayList<>();
		List<String> others = new ArrayList<>();
		for (Ref ref : refsToMerge) {
			if (ref.getName().startsWith(Constants.R_HEADS)) {
				branches.add("'" + Repository.shortenRefName(ref.getName()) //$NON-NLS-1$
						+ "'"); //$NON-NLS-1$
			} else if (ref.getName().startsWith(Constants.R_REMOTES)) {
				remoteBranches.add("'" //$NON-NLS-1$
						+ Repository.shortenRefName(ref.getName()) + "'"); //$NON-NLS-1$
			} else if (ref.getName().startsWith(Constants.R_TAGS)) {
				tags.add("'" + Repository.shortenRefName(ref.getName()) + "'"); //$NON-NLS-1$ //$NON-NLS-2$
			} else {
				ObjectId objectId = ref.getObjectId();
				if (objectId != null && ref.getName().equals(objectId.getName())) {
					commits.add("'" + ref.getName() + "'"); //$NON-NLS-1$ //$NON-NLS-2$
				} else {
					others.add(ref.getName());
				}
			}
		}

		List<String> listings = new ArrayList<>();

		if (!branches.isEmpty())
			listings.add(joinNames(branches, "branch", "branches")); //$NON-NLS-1$//$NON-NLS-2$

		if (!remoteBranches.isEmpty())
			listings.add(joinNames(remoteBranches, "remote-tracking branch", //$NON-NLS-1$
					"remote-tracking branches")); //$NON-NLS-1$

		if (!tags.isEmpty())
			listings.add(joinNames(tags, "tag", "tags")); //$NON-NLS-1$ //$NON-NLS-2$

		if (!commits.isEmpty())
			listings.add(joinNames(commits, "commit", "commits")); //$NON-NLS-1$ //$NON-NLS-2$

		if (!others.isEmpty())
			listings.add(StringUtils.join(others, ", ", " and ")); //$NON-NLS-1$ //$NON-NLS-2$

		sb.append(StringUtils.join(listings, ", ")); //$NON-NLS-1$

		String targetName = target.getLeaf().getName();
		if (!targetName.equals(Constants.R_HEADS + Constants.MASTER)) {
			String targetShortName = Repository.shortenRefName(targetName);
			sb.append(" into " + targetShortName); //$NON-NLS-1$
		}

		return sb.toString();
	}

	/**
	 * Add section with conflicting paths to merge message.
	 *
	 * @param message
	 *            the original merge message
	 * @param conflictingPaths
	 *            the paths with conflicts
	 * @return merge message with conflicting paths added
	 */
	public String formatWithConflicts(String message,
			List<String> conflictingPaths) {
		StringBuilder sb = new StringBuilder();
		String[] lines = message.split("\n"); //$NON-NLS-1$
		int firstFooterLine = ChangeIdUtil.indexOfFirstFooterLine(lines);
		for (int i = 0; i < firstFooterLine; i++)
			sb.append(lines[i]).append('\n');
		if (firstFooterLine == lines.length && message.length() != 0)
			sb.append('\n');
		addConflictsMessage(conflictingPaths, sb);
		if (firstFooterLine < lines.length)
			sb.append('\n');
		for (int i = firstFooterLine; i < lines.length; i++)
			sb.append(lines[i]).append('\n');
		return sb.toString();
	}

	private static void addConflictsMessage(List<String> conflictingPaths,
			StringBuilder sb) {
		sb.append("Conflicts:\n"); //$NON-NLS-1$
		for (String conflictingPath : conflictingPaths) {
			sb.append('\t').append(conflictingPath).append('\n');
		}
	}

	private static String joinNames(List<String> names, String singular,
			String plural) {
		if (names.size() == 1) {
			return singular + " " + names.get(0); //$NON-NLS-1$
		}
		return plural + " " + StringUtils.join(names, ", ", " and "); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
	}
}