org.eclipse.jgit.ignore.IgnoreNode Maven / Gradle / Ivy
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* Copyright (C) 2010, Red Hat Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
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* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
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*
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package org.eclipse.jgit.ignore;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.jgit.lib.Constants;
/**
* Represents a bundle of ignore rules inherited from a base directory.
*
* This class is not thread safe, it maintains state about the last match.
*/
public class IgnoreNode {
/** Result from {@link IgnoreNode#isIgnored(String, boolean)}. */
public static enum MatchResult {
/** The file is not ignored, due to a rule saying its not ignored. */
NOT_IGNORED,
/** The file is ignored due to a rule in this node. */
IGNORED,
/** The ignore status is unknown, check inherited rules. */
CHECK_PARENT,
/**
* The first previous (parent) ignore rule match (if any) should be
* negated, and then inherited rules applied.
*
* @since 3.6
*/
CHECK_PARENT_NEGATE_FIRST_MATCH;
}
/** The rules that have been parsed into this node. */
private final List rules;
/** Create an empty ignore node with no rules. */
public IgnoreNode() {
rules = new ArrayList<>();
}
/**
* Create an ignore node with given rules.
*
* @param rules
* list of rules.
**/
public IgnoreNode(List rules) {
this.rules = rules;
}
/**
* Parse files according to gitignore standards.
*
* @param in
* input stream holding the standard ignore format. The caller is
* responsible for closing the stream.
* @throws IOException
* Error thrown when reading an ignore file.
*/
public void parse(InputStream in) throws IOException {
BufferedReader br = asReader(in);
String txt;
while ((txt = br.readLine()) != null) {
if (txt.length() > 0 && !txt.startsWith("#") && !txt.equals("/")) { //$NON-NLS-1$ //$NON-NLS-2$
FastIgnoreRule rule = new FastIgnoreRule(txt);
if (!rule.isEmpty()) {
rules.add(rule);
}
}
}
}
private static BufferedReader asReader(InputStream in) {
return new BufferedReader(new InputStreamReader(in, Constants.CHARSET));
}
/** @return list of all ignore rules held by this node. */
public List getRules() {
return Collections.unmodifiableList(rules);
}
/**
* Determine if an entry path matches an ignore rule.
*
* @param entryPath
* the path to test. The path must be relative to this ignore
* node's own repository path, and in repository path format
* (uses '/' and not '\').
* @param isDirectory
* true if the target item is a directory.
* @return status of the path.
*/
public MatchResult isIgnored(String entryPath, boolean isDirectory) {
return isIgnored(entryPath, isDirectory, false);
}
/**
* Determine if an entry path matches an ignore rule.
*
* @param entryPath
* the path to test. The path must be relative to this ignore
* node's own repository path, and in repository path format
* (uses '/' and not '\').
* @param isDirectory
* true if the target item is a directory.
* @param negateFirstMatch
* true if the first match should be negated
* @return status of the path.
* @since 3.6
*/
public MatchResult isIgnored(String entryPath, boolean isDirectory,
boolean negateFirstMatch) {
if (rules.isEmpty())
if (negateFirstMatch)
return MatchResult.CHECK_PARENT_NEGATE_FIRST_MATCH;
else
return MatchResult.CHECK_PARENT;
// Parse rules in the reverse order that they were read
for (int i = rules.size() - 1; i > -1; i--) {
FastIgnoreRule rule = rules.get(i);
if (rule.isMatch(entryPath, isDirectory)) {
if (rule.getResult()) {
// rule matches: path could be ignored
if (negateFirstMatch)
// ignore current match, reset "negate" flag, continue
negateFirstMatch = false;
else
// valid match, just return
return MatchResult.IGNORED;
} else {
// found negated rule
if (negateFirstMatch)
// not possible to re-include excluded ignore rule
return MatchResult.NOT_IGNORED;
else
// set the flag and continue
negateFirstMatch = true;
}
}
}
if (negateFirstMatch)
// negated rule found but there is no previous rule in *this* file
return MatchResult.CHECK_PARENT_NEGATE_FIRST_MATCH;
// *this* file has no matching rules
return MatchResult.CHECK_PARENT;
}
@Override
public String toString() {
return rules.toString();
}
}
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