org.apache.tools.ant.DirectoryScanner Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
*
* https://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 org.apache.tools.ant;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Vector;
import java.util.function.Predicate;
import java.util.stream.Stream;
import org.apache.tools.ant.taskdefs.condition.Os;
import org.apache.tools.ant.types.Resource;
import org.apache.tools.ant.types.ResourceFactory;
import org.apache.tools.ant.types.resources.FileResource;
import org.apache.tools.ant.types.selectors.FileSelector;
import org.apache.tools.ant.types.selectors.SelectorScanner;
import org.apache.tools.ant.types.selectors.SelectorUtils;
import org.apache.tools.ant.types.selectors.TokenizedPath;
import org.apache.tools.ant.types.selectors.TokenizedPattern;
import org.apache.tools.ant.util.FileUtils;
import org.apache.tools.ant.util.VectorSet;
/**
* Class for scanning a directory for files/directories which match certain
* criteria.
*
* These criteria consist of selectors and patterns which have been specified.
* With the selectors you can select which files you want to have included.
* Files which are not selected are excluded. With patterns you can include
* or exclude files based on their filename.
*
*
* The idea is simple. A given directory is recursively scanned for all files
* and directories. Each file/directory is matched against a set of selectors,
* including special support for matching against filenames with include and
* and exclude patterns. Only files/directories which match at least one
* pattern of the include pattern list or other file selector, and don't match
* any pattern of the exclude pattern list or fail to match against a required
* selector will be placed in the list of files/directories found.
*
*
* When no list of include patterns is supplied, "**" will be used, which
* means that everything will be matched. When no list of exclude patterns is
* supplied, an empty list is used, such that nothing will be excluded. When
* no selectors are supplied, none are applied.
*
*
* The filename pattern matching is done as follows:
* The name to be matched is split up in path segments. A path segment is the
* name of a directory or file, which is bounded by
* File.separator ('/' under UNIX, '\' under Windows).
* For example, "abc/def/ghi/xyz.java" is split up in the segments "abc",
* "def","ghi" and "xyz.java".
* The same is done for the pattern against which should be matched.
*
*
* The segments of the name and the pattern are then matched against each
* other. When '**' is used for a path segment in the pattern, it matches
* zero or more path segments of the name.
*
*
* There is a special case regarding the use of File.separators
* at the beginning of the pattern and the string to match:
*
*
* - When a pattern starts with a
File.separator, the string
* to match must also start with a File.separator.
* - When a pattern does not start with a
File.separator, the
* string to match may not start with a File.separator.
* - When one of the above rules is not obeyed, the string will not
* match.
*
*
* When a name path segment is matched against a pattern path segment, the
* following special characters can be used:
* '*' matches zero or more characters
* '?' matches one character.
*
*
* Examples:
*
*
* "**\*.class" matches all .class files/dirs in a directory tree.
*
*
* "test\a??.java" matches all files/dirs which start with an 'a', then two
* more characters and then ".java", in a directory called test.
*
*
* "**" matches everything in a directory tree.
*
*
* "**\test\**\XYZ*" matches all files/dirs which start with "XYZ" and where
* there is a parent directory called test (e.g. "abc\test\def\ghi\XYZ123").
*
*
* Case sensitivity may be turned off if necessary. By default, it is
* turned on.
*
*
* Example of usage:
*
*
* String[] includes = {"**\\*.class"};
* String[] excludes = {"modules\\*\\**"};
* ds.setIncludes(includes);
* ds.setExcludes(excludes);
* ds.setBasedir(new File("test"));
* ds.setCaseSensitive(true);
* ds.scan();
*
* System.out.println("FILES:");
* String[] files = ds.getIncludedFiles();
* for (int i = 0; i < files.length; i++) {
* System.out.println(files[i]);
* }
*
* This will scan a directory called test for .class files, but excludes all
* files in all proper subdirectories of a directory called "modules".
*
*/
public class DirectoryScanner
implements FileScanner, SelectorScanner, ResourceFactory {
/** Is OpenVMS the operating system we're running on? */
private static final boolean ON_VMS = Os.isFamily("openvms");
/**
* Patterns which should be excluded by default.
*
* Note that you can now add patterns to the list of default
* excludes. Added patterns will not become part of this array
* that has only been kept around for backwards compatibility
* reasons.
*
* @deprecated since 1.6.x.
* Use the {@link #getDefaultExcludes getDefaultExcludes}
* method instead.
*/
@Deprecated
protected static final String[] DEFAULTEXCLUDES = { //NOSONAR
// Miscellaneous typical temporary files
SelectorUtils.DEEP_TREE_MATCH + "/*~",
SelectorUtils.DEEP_TREE_MATCH + "/#*#",
SelectorUtils.DEEP_TREE_MATCH + "/.#*",
SelectorUtils.DEEP_TREE_MATCH + "/%*%",
SelectorUtils.DEEP_TREE_MATCH + "/._*",
// CVS
SelectorUtils.DEEP_TREE_MATCH + "/CVS",
SelectorUtils.DEEP_TREE_MATCH + "/CVS/" + SelectorUtils.DEEP_TREE_MATCH,
SelectorUtils.DEEP_TREE_MATCH + "/.cvsignore",
// SCCS
SelectorUtils.DEEP_TREE_MATCH + "/SCCS",
SelectorUtils.DEEP_TREE_MATCH + "/SCCS/" + SelectorUtils.DEEP_TREE_MATCH,
// Visual SourceSafe
SelectorUtils.DEEP_TREE_MATCH + "/vssver.scc",
// Subversion
SelectorUtils.DEEP_TREE_MATCH + "/.svn",
SelectorUtils.DEEP_TREE_MATCH + "/.svn/" + SelectorUtils.DEEP_TREE_MATCH,
// Git
SelectorUtils.DEEP_TREE_MATCH + "/.git",
SelectorUtils.DEEP_TREE_MATCH + "/.git/" + SelectorUtils.DEEP_TREE_MATCH,
SelectorUtils.DEEP_TREE_MATCH + "/.gitattributes",
SelectorUtils.DEEP_TREE_MATCH + "/.gitignore",
SelectorUtils.DEEP_TREE_MATCH + "/.gitmodules",
// Mercurial
SelectorUtils.DEEP_TREE_MATCH + "/.hg",
SelectorUtils.DEEP_TREE_MATCH + "/.hg/" + SelectorUtils.DEEP_TREE_MATCH,
SelectorUtils.DEEP_TREE_MATCH + "/.hgignore",
SelectorUtils.DEEP_TREE_MATCH + "/.hgsub",
SelectorUtils.DEEP_TREE_MATCH + "/.hgsubstate",
SelectorUtils.DEEP_TREE_MATCH + "/.hgtags",
// Bazaar
SelectorUtils.DEEP_TREE_MATCH + "/.bzr",
SelectorUtils.DEEP_TREE_MATCH + "/.bzr/" + SelectorUtils.DEEP_TREE_MATCH,
SelectorUtils.DEEP_TREE_MATCH + "/.bzrignore",
// Mac
SelectorUtils.DEEP_TREE_MATCH + "/.DS_Store"
};
/**
* default value for {@link #maxLevelsOfSymlinks maxLevelsOfSymlinks}
* @since Ant 1.8.0
*/
public static final int MAX_LEVELS_OF_SYMLINKS = 5;
/**
* The end of the exception message if something that should be
* there doesn't exist.
*/
public static final String DOES_NOT_EXIST_POSTFIX = " does not exist.";
/** Helper. */
private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
/**
* Patterns which should be excluded by default.
*
* @see #addDefaultExcludes()
*/
private static final Set defaultExcludes = new HashSet<>();
static {
resetDefaultExcludes();
}
// CheckStyle:VisibilityModifier OFF - bc
/** The base directory to be scanned. */
protected File basedir;
/** The patterns for the files to be included. */
protected String[] includes;
/** The patterns for the files to be excluded. */
protected String[] excludes;
/** Selectors that will filter which files are in our candidate list. */
protected FileSelector[] selectors = null;
/**
* The files which matched at least one include and no excludes
* and were selected.
*/
protected Vector filesIncluded;
/** The files which did not match any includes or selectors. */
protected Vector filesNotIncluded;
/**
* The files which matched at least one include and at least
* one exclude.
*/
protected Vector filesExcluded;
/**
* The directories which matched at least one include and no excludes
* and were selected.
*/
protected Vector dirsIncluded;
/** The directories which were found and did not match any includes. */
protected Vector dirsNotIncluded;
/**
* The directories which matched at least one include and at least one
* exclude.
*/
protected Vector dirsExcluded;
/**
* The files which matched at least one include and no excludes and
* which a selector discarded.
*/
protected Vector filesDeselected;
/**
* The directories which matched at least one include and no excludes
* but which a selector discarded.
*/
protected Vector dirsDeselected;
/** Whether or not our results were built by a slow scan. */
protected boolean haveSlowResults = false;
/**
* Whether or not the file system should be treated as a case sensitive
* one.
*/
protected boolean isCaseSensitive = true;
/**
* Whether a missing base directory is an error.
* @since Ant 1.7.1
*/
protected boolean errorOnMissingDir = true;
/**
* Whether or not symbolic links should be followed.
*
* @since Ant 1.5
*/
private boolean followSymlinks = true;
/** Whether or not everything tested so far has been included. */
protected boolean everythingIncluded = true;
// CheckStyle:VisibilityModifier ON
/**
* List of all scanned directories.
*
* @since Ant 1.6
*/
private final Set scannedDirs = new HashSet<>();
/**
* Map of all include patterns that are full file names and don't
* contain any wildcards.
*
* Maps pattern string to TokenizedPath.
*
* If this instance is not case sensitive, the file names get
* turned to upper case.
*
* Gets lazily initialized on the first invocation of
* isIncluded or isExcluded and cleared at the end of the scan
* method (cleared in clearCaches, actually).
*
* @since Ant 1.8.0
*/
private final Map includeNonPatterns = new HashMap<>();
/**
* Map of all exclude patterns that are full file names and don't
* contain any wildcards.
*
* Maps pattern string to TokenizedPath.
*
* If this instance is not case sensitive, the file names get
* turned to upper case.
*
* Gets lazily initialized on the first invocation of
* isIncluded or isExcluded and cleared at the end of the scan
* method (cleared in clearCaches, actually).
*
* @since Ant 1.8.0
*/
private final Map excludeNonPatterns = new HashMap<>();
/**
* Array of all include patterns that contain wildcards.
*
* Gets lazily initialized on the first invocation of
* isIncluded or isExcluded and cleared at the end of the scan
* method (cleared in clearCaches, actually).
*/
private TokenizedPattern[] includePatterns;
/**
* Array of all exclude patterns that contain wildcards.
*
* Gets lazily initialized on the first invocation of
* isIncluded or isExcluded and cleared at the end of the scan
* method (cleared in clearCaches, actually).
*/
private TokenizedPattern[] excludePatterns;
/**
* Have the non-pattern sets and pattern arrays for in- and
* excludes been initialized?
*
* @since Ant 1.6.3
*/
private boolean areNonPatternSetsReady = false;
/**
* Scanning flag.
*
* @since Ant 1.6.3
*/
private boolean scanning = false;
/**
* Scanning lock.
*
* @since Ant 1.6.3
*/
private final Object scanLock = new Object();
/**
* Slow scanning flag.
*
* @since Ant 1.6.3
*/
private boolean slowScanning = false;
/**
* Slow scanning lock.
*
* @since Ant 1.6.3
*/
private final Object slowScanLock = new Object();
/**
* Exception thrown during scan.
*
* @since Ant 1.6.3
*/
private IllegalStateException illegal = null;
/**
* The maximum number of times a symbolic link may be followed
* during a scan.
*
* @since Ant 1.8.0
*/
private int maxLevelsOfSymlinks = MAX_LEVELS_OF_SYMLINKS;
/**
* Absolute paths of all symlinks that haven't been followed but
* would have been if followsymlinks had been true or
* maxLevelsOfSymlinks had been higher.
*
* @since Ant 1.8.0
*/
private final Set notFollowedSymlinks = new HashSet<>();
/**
* Test whether or not a given path matches the start of a given
* pattern up to the first "**".
*
* This is not a general purpose test and should only be used if you
* can live with false positives. For example, pattern=**\a
* and str=b will yield true.
*
* @param pattern The pattern to match against. Must not be
* null.
* @param str The path to match, as a String. Must not be
* null.
*
* @return whether or not a given path matches the start of a given
* pattern up to the first "**".
*/
protected static boolean matchPatternStart(final String pattern, final String str) {
return SelectorUtils.matchPatternStart(pattern, str);
}
/**
* Test whether or not a given path matches the start of a given
* pattern up to the first "**".
*
* This is not a general purpose test and should only be used if you
* can live with false positives. For example, pattern=**\a
* and str=b will yield true.
*
* @param pattern The pattern to match against. Must not be
* null.
* @param str The path to match, as a String. Must not be
* null.
* @param isCaseSensitive Whether or not matching should be performed
* case sensitively.
*
* @return whether or not a given path matches the start of a given
* pattern up to the first "**".
*/
protected static boolean matchPatternStart(final String pattern, final String str,
final boolean isCaseSensitive) {
return SelectorUtils.matchPatternStart(pattern, str, isCaseSensitive);
}
/**
* Test whether or not a given path matches a given pattern.
*
* @param pattern The pattern to match against. Must not be
* null.
* @param str The path to match, as a String. Must not be
* null.
*
* @return true if the pattern matches against the string,
* or false otherwise.
*/
protected static boolean matchPath(final String pattern, final String str) {
return SelectorUtils.matchPath(pattern, str);
}
/**
* Test whether or not a given path matches a given pattern.
*
* @param pattern The pattern to match against. Must not be
* null.
* @param str The path to match, as a String. Must not be
* null.
* @param isCaseSensitive Whether or not matching should be performed
* case sensitively.
*
* @return true if the pattern matches against the string,
* or false otherwise.
*/
protected static boolean matchPath(final String pattern, final String str,
final boolean isCaseSensitive) {
return SelectorUtils.matchPath(pattern, str, isCaseSensitive);
}
/**
* Test whether or not a string matches against a pattern.
* The pattern may contain two special characters:
* '*' means zero or more characters
* '?' means one and only one character
*
* @param pattern The pattern to match against.
* Must not be null.
* @param str The string which must be matched against the pattern.
* Must not be null.
*
* @return true if the string matches against the pattern,
* or false otherwise.
*/
public static boolean match(final String pattern, final String str) {
return SelectorUtils.match(pattern, str);
}
/**
* Test whether or not a string matches against a pattern.
* The pattern may contain two special characters:
* '*' means zero or more characters
* '?' means one and only one character
*
* @param pattern The pattern to match against.
* Must not be null.
* @param str The string which must be matched against the pattern.
* Must not be null.
* @param isCaseSensitive Whether or not matching should be performed
* case sensitively.
*
*
* @return true if the string matches against the pattern,
* or false otherwise.
*/
protected static boolean match(final String pattern, final String str,
final boolean isCaseSensitive) {
return SelectorUtils.match(pattern, str, isCaseSensitive);
}
/**
* Get the list of patterns that should be excluded by default.
*
* @return An array of String based on the current
* contents of the defaultExcludes
* Set.
*
* @since Ant 1.6
*/
public static String[] getDefaultExcludes() {
synchronized (defaultExcludes) {
return defaultExcludes.toArray(new String[0]);
}
}
/**
* Add a pattern to the default excludes unless it is already a
* default exclude.
*
* @param s A string to add as an exclude pattern.
* @return true if the string was added;
* false if it already existed.
*
* @since Ant 1.6
*/
public static boolean addDefaultExclude(final String s) {
synchronized (defaultExcludes) {
return defaultExcludes.add(s);
}
}
/**
* Remove a string if it is a default exclude.
*
* @param s The string to attempt to remove.
* @return true if s was a default
* exclude (and thus was removed);
* false if s was not
* in the default excludes list to begin with.
*
* @since Ant 1.6
*/
public static boolean removeDefaultExclude(final String s) {
synchronized (defaultExcludes) {
return defaultExcludes.remove(s);
}
}
/**
* Go back to the hardwired default exclude patterns.
*
* @since Ant 1.6
*/
public static void resetDefaultExcludes() {
synchronized (defaultExcludes) {
defaultExcludes.clear();
Collections.addAll(defaultExcludes, DEFAULTEXCLUDES);
}
}
/**
* Set the base directory to be scanned. This is the directory which is
* scanned recursively. All '/' and '\' characters are replaced by
* File.separatorChar, so the separator used need not match
* File.separatorChar.
*
* @param basedir The base directory to scan.
*/
@Override
public void setBasedir(final String basedir) {
setBasedir(basedir == null ? null
: new File(basedir.replace('/', File.separatorChar).replace(
'\\', File.separatorChar)));
}
/**
* Set the base directory to be scanned. This is the directory which is
* scanned recursively.
*
* @param basedir The base directory for scanning.
*/
@Override
public synchronized void setBasedir(final File basedir) {
this.basedir = basedir;
}
/**
* Return the base directory to be scanned.
* This is the directory which is scanned recursively.
*
* @return the base directory to be scanned.
*/
@Override
public synchronized File getBasedir() {
return basedir;
}
/**
* Find out whether include exclude patterns are matched in a
* case sensitive way.
* @return whether or not the scanning is case sensitive.
* @since Ant 1.6
*/
public synchronized boolean isCaseSensitive() {
return isCaseSensitive;
}
/**
* Set whether or not include and exclude patterns are matched
* in a case sensitive way.
*
* @param isCaseSensitive whether or not the file system should be
* regarded as a case sensitive one.
*/
@Override
public synchronized void setCaseSensitive(final boolean isCaseSensitive) {
this.isCaseSensitive = isCaseSensitive;
}
/**
* Sets whether or not a missing base directory is an error
*
* @param errorOnMissingDir whether or not a missing base directory
* is an error
* @since Ant 1.7.1
*/
public void setErrorOnMissingDir(final boolean errorOnMissingDir) {
this.errorOnMissingDir = errorOnMissingDir;
}
/**
* Get whether or not a DirectoryScanner follows symbolic links.
*
* @return flag indicating whether symbolic links should be followed.
*
* @since Ant 1.6
*/
public synchronized boolean isFollowSymlinks() {
return followSymlinks;
}
/**
* Set whether or not symbolic links should be followed.
*
* @param followSymlinks whether or not symbolic links should be followed.
*/
public synchronized void setFollowSymlinks(final boolean followSymlinks) {
this.followSymlinks = followSymlinks;
}
/**
* The maximum number of times a symbolic link may be followed
* during a scan.
*
* @param max int
* @since Ant 1.8.0
*/
public void setMaxLevelsOfSymlinks(final int max) {
maxLevelsOfSymlinks = max;
}
/**
* Set the list of include patterns to use. All '/' and '\' characters
* are replaced by File.separatorChar, so the separator used
* need not match File.separatorChar.
*
* When a pattern ends with a '/' or '\', "**" is appended.
*
* @param includes A list of include patterns.
* May be null, indicating that all files
* should be included. If a non-null
* list is given, all elements must be
* non-null.
*/
@Override
public synchronized void setIncludes(final String[] includes) {
if (includes == null) {
this.includes = null;
} else {
this.includes = Stream.of(includes)
.map(DirectoryScanner::normalizePattern).toArray(String[]::new);
}
}
/**
* Set the list of exclude patterns to use. All '/' and '\' characters
* are replaced by File.separatorChar, so the separator used
* need not match File.separatorChar.
*
* When a pattern ends with a '/' or '\', "**" is appended.
*
* @param excludes A list of exclude patterns.
* May be null, indicating that no files
* should be excluded. If a non-null list is
* given, all elements must be non-null.
*/
@Override
public synchronized void setExcludes(final String[] excludes) {
if (excludes == null) {
this.excludes = null;
} else {
this.excludes = Stream.of(excludes).map(DirectoryScanner::normalizePattern)
.toArray(String[]::new);
}
}
/**
* Add to the list of exclude patterns to use. All '/' and '\'
* characters are replaced by File.separatorChar, so
* the separator used need not match File.separatorChar.
*
* When a pattern ends with a '/' or '\', "**" is appended.
*
* @param excludes A list of exclude patterns.
* May be null, in which case the
* exclude patterns don't get changed at all.
*
* @since Ant 1.6.3
*/
public synchronized void addExcludes(final String[] excludes) {
if (excludes != null && excludes.length > 0) {
if (this.excludes == null || this.excludes.length == 0) {
setExcludes(excludes);
} else {
this.excludes = Stream.concat(Stream.of(this.excludes),
Stream.of(excludes).map(DirectoryScanner::normalizePattern))
.toArray(String[]::new);
}
}
}
/**
* All '/' and '\' characters are replaced by
* File.separatorChar, so the separator used need not
* match File.separatorChar.
*
*
When a pattern ends with a '/' or '\', "**" is appended.
*
* @since Ant 1.6.3
*/
private static String normalizePattern(final String p) {
String pattern = p.replace('/', File.separatorChar)
.replace('\\', File.separatorChar);
if (pattern.endsWith(File.separator)) {
pattern += SelectorUtils.DEEP_TREE_MATCH;
}
return pattern;
}
/**
* Set the selectors that will select the filelist.
*
* @param selectors specifies the selectors to be invoked on a scan.
*/
@Override
public synchronized void setSelectors(final FileSelector[] selectors) {
this.selectors = selectors;
}
/**
* Return whether or not the scanner has included all the files or
* directories it has come across so far.
*
* @return true if all files and directories which have
* been found so far have been included.
*/
public synchronized boolean isEverythingIncluded() {
return everythingIncluded;
}
/**
* Scan for files which match at least one include pattern and don't match
* any exclude patterns. If there are selectors then the files must pass
* muster there, as well. Scans under basedir, if set; otherwise the
* include patterns without leading wildcards specify the absolute paths of
* the files that may be included.
*
* @exception IllegalStateException if the base directory was set
* incorrectly (i.e. if it doesn't exist or isn't a directory).
*/
@Override
public void scan() throws IllegalStateException {
synchronized (scanLock) {
if (scanning) {
while (scanning) {
try {
scanLock.wait();
} catch (final InterruptedException ignored) {
}
}
if (illegal != null) {
throw illegal;
}
return;
}
scanning = true;
}
final File savedBase = basedir;
try {
synchronized (this) {
illegal = null;
clearResults();
// set in/excludes to reasonable defaults if needed:
final boolean nullIncludes = includes == null;
includes = nullIncludes ? new String[] {SelectorUtils.DEEP_TREE_MATCH} : includes;
final boolean nullExcludes = excludes == null;
excludes = nullExcludes ? new String[0] : excludes;
if (basedir != null && !followSymlinks
&& Files.isSymbolicLink(basedir.toPath())) {
notFollowedSymlinks.add(basedir.getAbsolutePath());
basedir = null;
}
if (basedir == null) {
// if no basedir and no includes, nothing to do:
if (nullIncludes) {
return;
}
} else {
if (!basedir.exists()) {
if (errorOnMissingDir) {
illegal = new IllegalStateException("basedir "
+ basedir
+ DOES_NOT_EXIST_POSTFIX);
} else {
// Nothing to do - basedir does not exist
return;
}
} else if (!basedir.isDirectory()) {
illegal = new IllegalStateException("basedir "
+ basedir
+ " is not a directory.");
}
if (illegal != null) {
throw illegal;
}
}
if (isIncluded(TokenizedPath.EMPTY_PATH)) {
if (isExcluded(TokenizedPath.EMPTY_PATH)) {
dirsExcluded.addElement("");
} else if (isSelected("", basedir)) {
dirsIncluded.addElement("");
} else {
dirsDeselected.addElement("");
}
} else {
dirsNotIncluded.addElement("");
}
checkIncludePatterns();
clearCaches();
includes = nullIncludes ? null : includes;
excludes = nullExcludes ? null : excludes;
}
} finally {
basedir = savedBase;
synchronized (scanLock) {
scanning = false;
scanLock.notifyAll();
}
}
}
/**
* This routine is actually checking all the include patterns in
* order to avoid scanning everything under base dir.
* @since Ant 1.6
*/
private void checkIncludePatterns() {
ensureNonPatternSetsReady();
final Map newroots = new HashMap<>();
// put in the newroots map the include patterns without
// wildcard tokens
for (TokenizedPattern includePattern : includePatterns) {
final String pattern = includePattern.toString();
if (!shouldSkipPattern(pattern)) {
newroots.put(includePattern.rtrimWildcardTokens(), pattern);
}
}
for (final Map.Entry entry : includeNonPatterns
.entrySet()) {
final String pattern = entry.getKey();
if (!shouldSkipPattern(pattern)) {
newroots.put(entry.getValue(), pattern);
}
}
if (newroots.containsKey(TokenizedPath.EMPTY_PATH)
&& basedir != null) {
// we are going to scan everything anyway
scandir(basedir, "", true);
} else {
File canonBase = null;
if (basedir != null) {
try {
canonBase = basedir.getCanonicalFile();
} catch (final IOException ex) {
throw new BuildException(ex);
}
}
// only scan directories that can include matched files or
// directories
for (final Map.Entry entry : newroots.entrySet()) {
TokenizedPath currentPath = entry.getKey();
String currentelement = currentPath.toString();
if (basedir == null && !FileUtils.isAbsolutePath(currentelement)) {
continue;
}
File myfile = new File(basedir, currentelement);
if (myfile.exists()) {
// may be on a case insensitive file system. We want
// the results to show what's really on the disk, so
// we need to double check.
try {
final String path = (basedir == null)
? myfile.getCanonicalPath()
: FILE_UTILS.removeLeadingPath(canonBase,
myfile.getCanonicalFile());
if (!path.equals(currentelement) || ON_VMS) {
myfile = currentPath.findFile(basedir, true);
if (myfile != null && basedir != null) {
currentelement = FILE_UTILS.removeLeadingPath(
basedir, myfile);
if (!currentPath.toString().equals(currentelement)) {
currentPath = new TokenizedPath(currentelement);
}
}
}
} catch (final IOException ex) {
throw new BuildException(ex);
}
}
if ((myfile == null || !myfile.exists()) && !isCaseSensitive()) {
final File f = currentPath.findFile(basedir, false);
if (f != null && f.exists()) {
// adapt currentelement to the case we've
// actually found
currentelement = (basedir == null)
? f.getAbsolutePath()
: FILE_UTILS.removeLeadingPath(basedir, f);
myfile = f;
currentPath = new TokenizedPath(currentelement);
}
}
if (myfile != null && myfile.exists()) {
if (!followSymlinks && currentPath.isSymlink(basedir)) {
accountForNotFollowedSymlink(currentPath, myfile);
continue;
}
if (myfile.isDirectory()) {
if (isIncluded(currentPath) && !currentelement.isEmpty()) {
accountForIncludedDir(currentPath, myfile, true);
} else {
scandir(myfile, currentPath, true);
}
} else if (myfile.isFile()) {
final String originalpattern = entry.getValue();
final boolean included = isCaseSensitive()
? originalpattern.equals(currentelement)
: originalpattern.equalsIgnoreCase(currentelement);
if (included) {
accountForIncludedFile(currentPath, myfile);
}
}
}
}
}
}
/**
* true if the pattern specifies a relative path without basedir
* or an absolute path not inside basedir.
*
* @since Ant 1.8.0
*/
private boolean shouldSkipPattern(final String pattern) {
if (FileUtils.isAbsolutePath(pattern)) {
//skip abs. paths not under basedir, if set:
return !(basedir == null || SelectorUtils.matchPatternStart(pattern,
basedir.getAbsolutePath(), isCaseSensitive()));
}
return basedir == null;
}
/**
* Clear the result caches for a scan.
*/
protected synchronized void clearResults() {
filesIncluded = new VectorSet<>();
filesNotIncluded = new VectorSet<>();
filesExcluded = new VectorSet<>();
filesDeselected = new VectorSet<>();
dirsIncluded = new VectorSet<>();
dirsNotIncluded = new VectorSet<>();
dirsExcluded = new VectorSet<>();
dirsDeselected = new VectorSet<>();
everythingIncluded = (basedir != null);
scannedDirs.clear();
notFollowedSymlinks.clear();
}
/**
* Top level invocation for a slow scan. A slow scan builds up a full
* list of excluded/included files/directories, whereas a fast scan
* will only have full results for included files, as it ignores
* directories which can't possibly hold any included files/directories.
*
* Returns immediately if a slow scan has already been completed.
*/
protected void slowScan() {
synchronized (slowScanLock) {
if (haveSlowResults) {
return;
}
if (slowScanning) {
while (slowScanning) {
try {
slowScanLock.wait();
} catch (final InterruptedException e) {
// Empty
}
}
return;
}
slowScanning = true;
}
try {
synchronized (this) {
// set in/excludes to reasonable defaults if needed:
final boolean nullIncludes = (includes == null);
includes = nullIncludes ? new String[] {SelectorUtils.DEEP_TREE_MATCH} : includes;
final boolean nullExcludes = (excludes == null);
excludes = nullExcludes ? new String[0] : excludes;
final String[] excl = new String[dirsExcluded.size()];
dirsExcluded.copyInto(excl);
final String[] notIncl = new String[dirsNotIncluded.size()];
dirsNotIncluded.copyInto(notIncl);
ensureNonPatternSetsReady();
processSlowScan(excl);
processSlowScan(notIncl);
clearCaches();
includes = nullIncludes ? null : includes;
excludes = nullExcludes ? null : excludes;
}
} finally {
synchronized (slowScanLock) {
haveSlowResults = true;
slowScanning = false;
slowScanLock.notifyAll();
}
}
}
private void processSlowScan(final String[] arr) {
for (String element : arr) {
final TokenizedPath path = new TokenizedPath(element);
if (!scanDuringFastScan(path)) {
scandir(new File(basedir, element), path, false);
}
}
}
private boolean scanDuringFastScan(TokenizedPath path) {
return couldHoldIncluded(path) && !contentsExcluded(path);
}
/**
* Scan the given directory for files and directories. Found files and
* directories are placed in their respective collections, based on the
* matching of includes, excludes, and the selectors. When a directory
* is found, it is scanned recursively.
*
* @param dir The directory to scan. Must not be null.
* @param vpath The path relative to the base directory (needed to
* prevent problems with an absolute path when using
* dir). Must not be null.
* @param fast Whether or not this call is part of a fast scan.
*
* @see #filesIncluded
* @see #filesNotIncluded
* @see #filesExcluded
* @see #dirsIncluded
* @see #dirsNotIncluded
* @see #dirsExcluded
* @see #slowScan
*/
protected void scandir(final File dir, final String vpath, final boolean fast) {
scandir(dir, new TokenizedPath(vpath), fast);
}
/**
* Scan the given directory for files and directories. Found files and
* directories are placed in their respective collections, based on the
* matching of includes, excludes, and the selectors. When a directory
* is found, it is scanned recursively.
*
* @param dir The directory to scan. Must not be null.
* @param path The path relative to the base directory (needed to
* prevent problems with an absolute path when using
* dir). Must not be null.
* @param fast Whether or not this call is part of a fast scan.
*
* @see #filesIncluded
* @see #filesNotIncluded
* @see #filesExcluded
* @see #dirsIncluded
* @see #dirsNotIncluded
* @see #dirsExcluded
* @see #slowScan
*/
private void scandir(final File dir, final TokenizedPath path, final boolean fast) {
if (dir == null) {
throw new BuildException("dir must not be null.");
}
final String[] newfiles = dir.list();
if (newfiles == null) {
if (!dir.exists()) {
throw new BuildException(dir + DOES_NOT_EXIST_POSTFIX);
} else if (!dir.isDirectory()) {
throw new BuildException("%s is not a directory.", dir);
} else {
throw new BuildException("IO error scanning directory '%s'",
dir.getAbsolutePath());
}
}
scandir(dir, path, fast, newfiles, new LinkedList<>());
}
private void scandir(final File dir, final TokenizedPath path, final boolean fast,
String[] newFiles, final Deque directoryNamesFollowed) {
String vpath = path.toString();
if (!vpath.isEmpty() && !vpath.endsWith(File.separator)) {
vpath += File.separator;
}
// avoid double scanning of directories, can only happen in fast mode
if (fast && hasBeenScanned(vpath)) {
return;
}
if (!followSymlinks) {
final ArrayList noLinks = new ArrayList<>();
for (final String newFile : newFiles) {
final Path filePath;
if (dir == null) {
filePath = Paths.get(newFile);
} else {
filePath = Paths.get(dir.toPath().toString(), newFile);
}
if (Files.isSymbolicLink(filePath)) {
final String name = vpath + newFile;
final File file = new File(dir, newFile);
if (file.isDirectory()) {
dirsExcluded.addElement(name);
} else if (file.isFile()) {
filesExcluded.addElement(name);
}
accountForNotFollowedSymlink(name, file);
} else {
noLinks.add(newFile);
}
}
newFiles = noLinks.toArray(new String[0]);
} else {
directoryNamesFollowed.addFirst(dir.getName());
}
for (String newFile : newFiles) {
final String name = vpath + newFile;
final TokenizedPath newPath = new TokenizedPath(path, newFile);
final File file = new File(dir, newFile);
final String[] children;
// don't invoke file.list() if we know we never use the children
if (fast // slow scan scans everything anyway
&& file.isDirectory() // otherwise we need list() to know whether this is a directory
&& !scanDuringFastScan(newPath) // otherwise we'd invoke scandir
) {
children = new String[0];
} else {
children = file.list();
}
if (children == null || (children.length == 0 && file.isFile())) {
if (isIncluded(newPath)) {
accountForIncludedFile(newPath, file);
} else {
everythingIncluded = false;
filesNotIncluded.addElement(name);
}
} else if (file.isDirectory()) { // dir
if (followSymlinks
&& causesIllegalSymlinkLoop(newFile, dir, directoryNamesFollowed)) {
// will be caught and redirected to Ant's logging system
System.err.println("skipping symbolic link "
+ file.getAbsolutePath()
+ " -- too many levels of symbolic"
+ " links.");
notFollowedSymlinks.add(file.getAbsolutePath());
continue;
}
if (isIncluded(newPath)) {
accountForIncludedDir(newPath, file, fast, children,
directoryNamesFollowed);
} else {
everythingIncluded = false;
dirsNotIncluded.addElement(name);
if (fast && scanDuringFastScan(newPath)) {
scandir(file, newPath, fast, children, directoryNamesFollowed);
}
}
if (!fast) {
scandir(file, newPath, fast, children, directoryNamesFollowed);
}
}
}
if (followSymlinks) {
directoryNamesFollowed.removeFirst();
}
}
/**
* Process included file.
* @param name path of the file relative to the directory of the FileSet.
* @param file included File.
*/
private void accountForIncludedFile(final TokenizedPath name, final File file) {
processIncluded(name, file, filesIncluded, filesExcluded,
filesDeselected);
}
/**
* Process included directory.
* @param name path of the directory relative to the directory of
* the FileSet.
* @param file directory as File.
* @param fast whether to perform fast scans.
*/
private void accountForIncludedDir(final TokenizedPath name, final File file,
final boolean fast) {
processIncluded(name, file, dirsIncluded, dirsExcluded, dirsDeselected);
if (fast && scanDuringFastScan(name)) {
scandir(file, name, fast);
}
}
private void accountForIncludedDir(final TokenizedPath name,
final File file, final boolean fast,
final String[] children,
final Deque directoryNamesFollowed) {
processIncluded(name, file, dirsIncluded, dirsExcluded, dirsDeselected);
if (fast && scanDuringFastScan(name)) {
scandir(file, name, fast, children, directoryNamesFollowed);
}
}
private void accountForNotFollowedSymlink(final String name, final File file) {
accountForNotFollowedSymlink(new TokenizedPath(name), file);
}
private void accountForNotFollowedSymlink(final TokenizedPath name, final File file) {
if (!isExcluded(name) && (isIncluded(name)
|| (file.isDirectory() && scanDuringFastScan(name)))) {
notFollowedSymlinks.add(file.getAbsolutePath());
}
}
private void processIncluded(final TokenizedPath path,
final File file, final List inc, final List exc,
final List des) {
final String name = path.toString();
if (inc.contains(name) || exc.contains(name) || des.contains(name)) {
return;
}
boolean included = false;
if (isExcluded(path)) {
exc.add(name);
} else if (isSelected(name, file)) {
included = true;
inc.add(name);
} else {
des.add(name);
}
everythingIncluded &= included;
}
/**
* Test whether or not a name matches against at least one include
* pattern.
*
* @param name The path to match. Must not be null.
* @return true when the name matches against at least one
* include pattern, or false otherwise.
*/
protected boolean isIncluded(final String name) {
return isIncluded(new TokenizedPath(name));
}
/**
* Test whether or not a name matches against at least one include
* pattern.
*
* @param path The tokenized path to match. Must not be null.
* @return true when the name matches against at least one
* include pattern, or false otherwise.
*/
private boolean isIncluded(final TokenizedPath path) {
ensureNonPatternSetsReady();
String toMatch = path.toString();
if (!isCaseSensitive()) {
toMatch = toMatch.toUpperCase();
}
return includeNonPatterns.containsKey(toMatch)
|| Stream.of(includePatterns).anyMatch(p -> p.matchPath(path, isCaseSensitive()));
}
/**
* Test whether or not a name matches the start of at least one include
* pattern.
*
* @param name The name to match. Must not be null.
* @return true when the name matches against the start of at
* least one include pattern, or false otherwise.
*/
protected boolean couldHoldIncluded(final String name) {
return couldHoldIncluded(new TokenizedPath(name));
}
/**
* Test whether or not a name matches the start of at least one include
* pattern.
*
* @param tokenizedName The name to match. Must not be null.
* @return true when the name matches against the start of at
* least one include pattern, or false otherwise.
*/
private boolean couldHoldIncluded(final TokenizedPath tokenizedName) {
return Stream.concat(Stream.of(includePatterns),
includeNonPatterns.values().stream().map(TokenizedPath::toPattern))
.anyMatch(pat -> couldHoldIncluded(tokenizedName, pat));
}
/**
* Test whether or not a name matches the start of the given
* include pattern.
*
* @param tokenizedName The name to match. Must not be null.
* @return true when the name matches against the start of the
* include pattern, or false otherwise.
*/
private boolean couldHoldIncluded(final TokenizedPath tokenizedName,
final TokenizedPattern tokenizedInclude) {
return tokenizedInclude.matchStartOf(tokenizedName, isCaseSensitive())
&& isMorePowerfulThanExcludes(tokenizedName.toString())
&& isDeeper(tokenizedInclude, tokenizedName);
}
/**
* Verify that a pattern specifies files deeper
* than the level of the specified file.
* @param pattern the pattern to check.
* @param name the name to check.
* @return whether the pattern is deeper than the name.
* @since Ant 1.6.3
*/
private boolean isDeeper(final TokenizedPattern pattern, final TokenizedPath name) {
return pattern.containsPattern(SelectorUtils.DEEP_TREE_MATCH)
|| pattern.depth() > name.depth();
}
/**
* Find out whether one particular include pattern is more powerful
* than all the excludes.
* Note: the power comparison is based on the length of the include pattern
* and of the exclude patterns without the wildcards.
* Ideally the comparison should be done based on the depth
* of the match; that is to say how many file separators have been matched
* before the first ** or the end of the pattern.
*
* IMPORTANT : this function should return false "with care".
*
* @param name the relative path to test.
* @return true if there is no exclude pattern more powerful than
* this include pattern.
* @since Ant 1.6
*/
private boolean isMorePowerfulThanExcludes(final String name) {
final String soughtexclude = name + File.separatorChar + SelectorUtils.DEEP_TREE_MATCH;
return Stream.of(excludePatterns).map(Object::toString)
.noneMatch(Predicate.isEqual(soughtexclude));
}
/**
* Test whether all contents of the specified directory must be excluded.
* @param path the path to check.
* @return whether all the specified directory's contents are excluded.
*/
/* package */ boolean contentsExcluded(final TokenizedPath path) {
return Stream.of(excludePatterns)
.filter(p -> p.endsWith(SelectorUtils.DEEP_TREE_MATCH))
.map(TokenizedPattern::withoutLastToken)
.anyMatch(wlt -> wlt.matchPath(path, isCaseSensitive()));
}
/**
* Test whether or not a name matches against at least one exclude
* pattern.
*
* @param name The name to match. Must not be null.
* @return true when the name matches against at least one
* exclude pattern, or false otherwise.
*/
protected boolean isExcluded(final String name) {
return isExcluded(new TokenizedPath(name));
}
/**
* Test whether or not a name matches against at least one exclude
* pattern.
*
* @param name The name to match. Must not be null.
* @return true when the name matches against at least one
* exclude pattern, or false otherwise.
*/
private boolean isExcluded(final TokenizedPath name) {
ensureNonPatternSetsReady();
String toMatch = name.toString();
if (!isCaseSensitive()) {
toMatch = toMatch.toUpperCase();
}
return excludeNonPatterns.containsKey(toMatch)
|| Stream.of(excludePatterns).anyMatch(p -> p.matchPath(name, isCaseSensitive()));
}
/**
* Test whether a file should be selected.
*
* @param name the filename to check for selecting.
* @param file the java.io.File object for this filename.
* @return false when the selectors says that the file
* should not be selected, true otherwise.
*/
protected boolean isSelected(final String name, final File file) {
return selectors == null
|| Stream.of(selectors).allMatch(sel -> sel.isSelected(basedir, name, file));
}
/**
* Return the names of the files which matched at least one of the
* include patterns and none of the exclude patterns.
* The names are relative to the base directory.
*
* @return the names of the files which matched at least one of the
* include patterns and none of the exclude patterns.
*/
@Override
public String[] getIncludedFiles() {
String[] files;
synchronized (this) {
if (filesIncluded == null) {
throw new IllegalStateException("Must call scan() first");
}
files = filesIncluded.toArray(new String[0]);
}
Arrays.sort(files);
return files;
}
/**
* Return the count of included files.
* @return int.
* @since Ant 1.6.3
*/
public synchronized int getIncludedFilesCount() {
if (filesIncluded == null) {
throw new IllegalStateException("Must call scan() first");
}
return filesIncluded.size();
}
/**
* Return the names of the files which matched none of the include
* patterns. The names are relative to the base directory. This involves
* performing a slow scan if one has not already been completed.
*
* @return the names of the files which matched none of the include
* patterns.
*
* @see #slowScan
*/
@Override
public synchronized String[] getNotIncludedFiles() {
slowScan();
return filesNotIncluded.toArray(new String[0]);
}
/**
* Return the names of the files which matched at least one of the
* include patterns and at least one of the exclude patterns.
* The names are relative to the base directory. This involves
* performing a slow scan if one has not already been completed.
*
* @return the names of the files which matched at least one of the
* include patterns and at least one of the exclude patterns.
*
* @see #slowScan
*/
@Override
public synchronized String[] getExcludedFiles() {
slowScan();
return filesExcluded.toArray(new String[0]);
}
/**
* Return the names of the files which were selected out and
* therefore not ultimately included.
*
* The names are relative to the base directory. This involves
* performing a slow scan if one has not already been completed.
*
* @return the names of the files which were deselected.
*
* @see #slowScan
*/
@Override
public synchronized String[] getDeselectedFiles() {
slowScan();
return filesDeselected.toArray(new String[0]);
}
/**
* Return the names of the directories which matched at least one of the
* include patterns and none of the exclude patterns.
* The names are relative to the base directory.
*
* @return the names of the directories which matched at least one of the
* include patterns and none of the exclude patterns.
*/
@Override
public String[] getIncludedDirectories() {
String[] directories;
synchronized (this) {
if (dirsIncluded == null) {
throw new IllegalStateException("Must call scan() first");
}
directories = dirsIncluded.toArray(new String[0]);
}
Arrays.sort(directories);
return directories;
}
/**
* Return the count of included directories.
* @return int.
* @since Ant 1.6.3
*/
public synchronized int getIncludedDirsCount() {
if (dirsIncluded == null) {
throw new IllegalStateException("Must call scan() first");
}
return dirsIncluded.size();
}
/**
* Return the names of the directories which matched none of the include
* patterns. The names are relative to the base directory. This involves
* performing a slow scan if one has not already been completed.
*
* @return the names of the directories which matched none of the include
* patterns.
*
* @see #slowScan
*/
@Override
public synchronized String[] getNotIncludedDirectories() {
slowScan();
return dirsNotIncluded.toArray(new String[0]);
}
/**
* Return the names of the directories which matched at least one of the
* include patterns and at least one of the exclude patterns.
* The names are relative to the base directory. This involves
* performing a slow scan if one has not already been completed.
*
* @return the names of the directories which matched at least one of the
* include patterns and at least one of the exclude patterns.
*
* @see #slowScan
*/
@Override
public synchronized String[] getExcludedDirectories() {
slowScan();
return dirsExcluded.toArray(new String[0]);
}
/**
* Return the names of the directories which were selected out and
* therefore not ultimately included.
*
* The names are relative to the base directory. This involves
* performing a slow scan if one has not already been completed.
*
* @return the names of the directories which were deselected.
*
* @see #slowScan
*/
@Override
public synchronized String[] getDeselectedDirectories() {
slowScan();
return dirsDeselected.toArray(new String[0]);
}
/**
* Absolute paths of all symbolic links that haven't been followed
* but would have been followed had followsymlinks been true or
* maxLevelsOfSymlinks been bigger.
*
* @return sorted array of not followed symlinks
* @since Ant 1.8.0
* @see #notFollowedSymlinks
*/
public synchronized String[] getNotFollowedSymlinks() {
String[] links;
synchronized (this) {
links = notFollowedSymlinks.toArray(new String[0]);
}
Arrays.sort(links);
return links;
}
/**
* Add default exclusions to the current exclusions set.
*/
@Override
public synchronized void addDefaultExcludes() {
Stream s = Stream.of(getDefaultExcludes()).map(p -> p.replace('/',
File.separatorChar).replace('\\', File.separatorChar));
if (excludes != null) {
s = Stream.concat(Stream.of(excludes), s);
}
excludes = s.toArray(String[]::new);
}
/**
* Get the named resource.
* @param name path name of the file relative to the dir attribute.
*
* @return the resource with the given name.
* @since Ant 1.5.2
*/
@Override
public synchronized Resource getResource(final String name) {
return new FileResource(basedir, name);
}
/**
* Has the directory with the given path relative to the base
* directory already been scanned?
*
* Registers the given directory as scanned as a side effect.
*
* @since Ant 1.6
*/
private boolean hasBeenScanned(final String vpath) {
return !scannedDirs.add(vpath);
}
/**
* This method is of interest for testing purposes. The returned
* Set is live and should not be modified.
* @return the Set of relative directory names that have been scanned.
*/
/* package-private */ Set getScannedDirs() {
return scannedDirs;
}
/**
* Clear internal caches.
*
* @since Ant 1.6
*/
private synchronized void clearCaches() {
includeNonPatterns.clear();
excludeNonPatterns.clear();
includePatterns = null;
excludePatterns = null;
areNonPatternSetsReady = false;
}
/**
* Ensure that the in|exclude "patterns"
* have been properly divided up.
*
* @since Ant 1.6.3
*/
/* package */ synchronized void ensureNonPatternSetsReady() {
if (!areNonPatternSetsReady) {
includePatterns = fillNonPatternSet(includeNonPatterns, includes);
excludePatterns = fillNonPatternSet(excludeNonPatterns, excludes);
areNonPatternSetsReady = true;
}
}
/**
* Add all patterns that are not real patterns (do not contain
* wildcards) to the set and returns the real patterns.
*
* @param map Map to populate.
* @param patterns String[] of patterns.
* @since Ant 1.8.0
*/
private TokenizedPattern[] fillNonPatternSet(final Map map,
final String[] patterns) {
final List al = new ArrayList<>(patterns.length);
for (String pattern : patterns) {
if (SelectorUtils.hasWildcards(pattern)) {
al.add(new TokenizedPattern(pattern));
} else {
final String s = isCaseSensitive() ? pattern : pattern.toUpperCase();
map.put(s, new TokenizedPath(s));
}
}
return al.toArray(new TokenizedPattern[0]);
}
/**
* Would following the given directory cause a loop of symbolic
* links deeper than allowed?
*
* Can only happen if the given directory has been seen at
* least more often than allowed during the current scan and it is
* a symbolic link and enough other occurrences of the same name
* higher up are symbolic links that point to the same place.
*
* @since Ant 1.8.0
*/
private boolean causesIllegalSymlinkLoop(final String dirName, final File parent,
final Deque directoryNamesFollowed) {
try {
final Path dirPath;
if (parent == null) {
dirPath = Paths.get(dirName);
} else {
dirPath = Paths.get(parent.toPath().toString(), dirName);
}
if (directoryNamesFollowed.size() >= maxLevelsOfSymlinks
&& Collections.frequency(directoryNamesFollowed, dirName) >= maxLevelsOfSymlinks
&& Files.isSymbolicLink(dirPath)) {
final List files = new ArrayList<>();
File f = FILE_UTILS.resolveFile(parent, dirName);
final String target = f.getCanonicalPath();
files.add(target);
StringBuilder relPath = new StringBuilder();
for (final String dir : directoryNamesFollowed) {
relPath.append("../");
if (dirName.equals(dir)) {
f = FILE_UTILS.resolveFile(parent, relPath + dir);
files.add(f.getCanonicalPath());
if (files.size() > maxLevelsOfSymlinks
&& Collections.frequency(files, target) > maxLevelsOfSymlinks) {
return true;
}
}
}
}
return false;
} catch (final IOException ex) {
throw new BuildException(
"Caught error while checking for symbolic links", ex);
}
}
}