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Introduce overwrite parameter to File.copyRecursively.

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#KT-8924 Fixed
This commit is contained in:
Ilya Gorbunov
2016-01-22 06:35:51 +03:00
parent d03c174650
commit 67663c43ae
2 changed files with 70 additions and 19 deletions
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libraries/stdlib/src/kotlin/io/files/Utils.kt
+24 -9
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@@ -218,7 +218,7 @@ public enum class OnErrorAction {
private class TerminateException(file: File) : FileSystemException(file) {}
/**
* Copies this file with all its children to the specified destination [dst] path.
* Copies this file with all its children to the specified destination [target] path.
* If some directories on the way to the destination are missing, then they will be created.
*
* If any errors occur during the copying, then further actions will depend on the result of the call
@@ -231,11 +231,13 @@ private class TerminateException(file: File) : FileSystemException(file) {}
* AccessDeniedException - if there was an attempt to open a directory that didn't succeed.
* IOException - if some problems occur when copying.
*
* @param overwrite `true` if it is allowed to overwrite existing destination files and directories.
* @return `false` if the copying was terminated, `true` otherwise.
*
* Note that if this function fails, then partial copying may have taken place.
*/
public fun File.copyRecursively(dst: File,
public fun File.copyRecursively(target: File,
overwrite: Boolean = false,
onError: (File, IOException) -> OnErrorAction =
{ file, exception -> throw exception }
): Boolean {
@@ -252,16 +254,29 @@ public fun File.copyRecursively(dst: File,
return false
} else {
val relPath = src.toRelativeString(this)
val dstFile = File(dst, relPath)
val dstFile = File(target, relPath)
if (dstFile.exists() && !(src.isDirectory && dstFile.isDirectory)) {
if (onError(dstFile, FileAlreadyExistsException(file = src,
other = dstFile,
reason = "The destination file already exists")) == OnErrorAction.TERMINATE)
return false
} else if (src.isDirectory) {
val stillExists = if (!overwrite) true else {
if (dstFile.isDirectory)
!dstFile.deleteRecursively()
else
!dstFile.delete()
}
if (stillExists) {
if (onError(dstFile, FileAlreadyExistsException(file = src,
other = dstFile,
reason = "The destination file already exists")) == OnErrorAction.TERMINATE)
return false
continue
}
}
if (src.isDirectory) {
dstFile.mkdirs()
} else {
if (src.copyTo(dstFile, true) != src.length()) {
if (src.copyTo(dstFile, overwrite) != src.length()) {
if (onError(src, IOException("src.length() != dst.length()")) == OnErrorAction.TERMINATE)
return false
}