[
https://issues.apache.org/jira/browse/IO-850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17833906#comment-17833906
]
Gary D. Gregory commented on IO-850:
------------------------------------
[[email protected]]
I cannot reproduce your text in a unit test, please see
[https://github.com/apache/commons-io/blob/08b3ea4ed7c09b65260d1929d42b9a5c39d5007a/src/test/java/org/apache/commons/io/file/DeletingPathVisitorTest.java#L121-L157]
{code:java}
/**
* Tests https://issues.apache.org/jira/browse/IO-850
*/
@Test
public void testIO850DirectoriesOnly() throws IOException {
final Path rootDir =
Files.createDirectory(managedTempDirPath.resolve("IO850"));
createTempSymlinkedRelativeDir(rootDir);
final Path targetDir = rootDir.resolve(SUB_DIR);
final Path symlinkDir = rootDir.resolve(SYMLINKED_DIR);
final DeletingPathVisitor visitor =
DeletingPathVisitor.withLongCounters();
Files.walkFileTree(rootDir, visitor);
assertFalse(Files.exists(targetDir));
assertFalse(Files.exists(symlinkDir));
assertFalse(Files.exists(rootDir));
assertTrue(visitor.getPathCounters().getDirectoryCounter().get() > 0);
}
/**
* Tests https://issues.apache.org/jira/browse/IO-850
*/
@Test
public void testIO850DirectoriesAndFiles() throws IOException {
final Path rootDir =
Files.createDirectory(managedTempDirPath.resolve("IO850"));
createTempSymlinkedRelativeDir(rootDir);
final Path targetDir = rootDir.resolve(SUB_DIR);
final Path symlinkDir = rootDir.resolve(SYMLINKED_DIR);
Files.write(targetDir.resolve("file0.txt"),
"Hello".getBytes(StandardCharsets.UTF_8));
final Path subDir0 =
Files.createDirectory(targetDir.resolve("subDir0"));
Files.write(subDir0.resolve("file1.txt"),
"Hello".getBytes(StandardCharsets.UTF_8));
final DeletingPathVisitor visitor =
DeletingPathVisitor.withLongCounters();
Files.walkFileTree(rootDir, visitor);
assertFalse(Files.exists(targetDir));
assertFalse(Files.exists(symlinkDir));
assertFalse(Files.exists(rootDir));
assertTrue(visitor.getPathCounters().getDirectoryCounter().get() > 0);
assertTrue(visitor.getPathCounters().getFileCounter().get() > 0);
}
{code}
Would you please review and test with the current release {*}2.16.0{*}?
TY
> DeletingPathVisitor always fails to delete a dir when symbolic link target is
> deleted before the link itself
> ------------------------------------------------------------------------------------------------------------
>
> Key: IO-850
> URL: https://issues.apache.org/jira/browse/IO-850
> Project: Commons IO
> Issue Type: Bug
> Affects Versions: 2.15.1
> Reporter: Johan Compagner
> Priority: Major
>
> DeletingPathVisitor doesn't give us an option for the SimplePathVisitor
> superclass visitFileFailedFunction property (that constructor also exposed to
> the intermediate class CountingPathVisitor is not used/exposed in the
> DeletingPathVisitor class)
> So i can't use that but the DeletingPathVisitor should use that, because i
> can't delete a certain directory if you have something like this:
>
> parentdir:
> adir
> symboliclinkpointingtoadir
>
> if that happens and i call this Files.walkFileTree(path,
> DeletingPathVisitor.withLongCounters());
> on the parent dir and it first deletes "adir"
> then it will completely fail to delete that parentdir (or clean the parent
> dir)
> this is because Files will try to open the directory stream of that
> "symboliclinkpointingtoadir" and that will fail because the "adir" is already
> gone. so its now an invalid symbolic link. The the Files walkFileTree
> implementation does call visitFileFailed but that is competely not
> implemented in the DeletingPathVisitor and i have no means of also adding it
> to it.
> i think DeletingPathVisitor should just do what i now do in my own
> implementation:
>
>
> {code:java}
> public FileVisitResult
> visitFileFailed(Path file, IOException exc) throws IOException
> {
> Files.deleteIfExists(file);
> return FileVisitResult.CONTINUE;
> }
>
> {code}
> just try to delete that file and be done with it (this works fine)
> now it bombs out because that IOException is something like "FileNotFound"
> and if if i call it again and again on that dir (so "adir" is already gone)
> the DeletingPathVisitor is never able to delete/clean that parent dir it
> always bombs out.
>
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