fileVisitor

Builds a FileVisitor whose implementation is defined in builderAction.

By default, the returned file visitor visits all files and re-throws I/O errors, that is:

To override a function provide its implementation to the corresponding function of the FileVisitorBuilder that was passed as a receiver to builderAction. Note that each function can be overridden only once. Repeated override of a function throws IllegalStateException.

The builder is valid only inside builderAction function. Using it outside the function throws IllegalStateException.

Example:

val cleanVisitor = fileVisitor {
onPreVisitDirectory { directory, _ ->
if (directory.name == "build") {
directory.deleteRecursively()
FileVisitResult.SKIP_SUBTREE
} else {
FileVisitResult.CONTINUE
}
}

onVisitFile { file, _ ->
if (file.extension == "class") {
file.deleteExisting()
}
FileVisitResult.CONTINUE
}
}

Since Kotlin

2.1

See also