![Andrey Loskutov](https://secure.gravatar.com/avatar/edcd8fac9a54e10732d0027a782685df?d=identicon) [ignore rules] fix for backslash handling
An attempt to re-implement not well documented Git CLI behavior for
patterns with backslashes.
It looks like Git silently ignores all \ characters in ignore rules, if
they are NOT covered by 3 cases described in [1]:
{quote}
1) ... Put a backslash ("\") in front of the first hash for patterns
that begin with a hash.
...
2) Trailing spaces are ignored unless they are quoted with backslash
("\").
...
3) Put a backslash ("\") in front of the first "!" for patterns that
begin with a literal "!", for example, "\!important!.txt".
{quote}
Undocumented also is the fact that backslash itself can be escaped by
backslash.
So \h\e\l\l\o\.t\x\t rule matches hello.txt and a\\\\b a\b in Git CLI.
Additionally, the glob parser [2] knows special meaning of backslash:
{quote}
One can remove the special meaning of '?', '*' and '[' by preceding
them by a backslash, or, in case this is part of a shell command
line, enclosing them in quotes. Between brackets these characters
stand for themselves. Thus, "[[?*\]" matches the four characters
'[', '?', '*' and '\'.
{quote}
[1] https://www.kernel.org/pub/software/scm/git/docs/gitignore.html
[2] http://man7.org/linux/man-pages/man7/glob.7.html
Bug: 478065
Change-Id: I3dc973475d1943c5622103701fa8cb3ea0684e3e
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
8 years ago |
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- /*
- * Copyright (C) 2014, Andrey Loskutov <loskutov@gmx.de>
- * 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.ignore.internal;
-
- /**
- * Matcher for simple patterns ending with an asterisk, e.g. "Makefile.*"
- *
- * @since 3.6
- */
- public class TrailingAsteriskMatcher extends NameMatcher {
-
- TrailingAsteriskMatcher(String pattern, Character pathSeparator, boolean dirOnly) {
- super(pattern, pathSeparator, dirOnly, true);
-
- if (subPattern.charAt(subPattern.length() - 1) != '*')
- throw new IllegalArgumentException(
- "Pattern must have trailing asterisk: " + pattern); //$NON-NLS-1$
- }
-
- public boolean matches(String segment, int startIncl, int endExcl,
- boolean assumeDirectory) {
- // faster local access, same as in string.indexOf()
- String s = subPattern;
- // we don't need to count '*' character itself
- int subLenth = s.length() - 1;
- // simple /*/ pattern
- if (subLenth == 0)
- return true;
-
- if (subLenth > (endExcl - startIncl))
- return false;
-
- for (int i = 0; i < subLenth; i++) {
- char c1 = s.charAt(i);
- char c2 = segment.charAt(i + startIncl);
- if (c1 != c2)
- return false;
- }
- return true;
- }
-
- }
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