CODEWITHSUNDEEP
filegradledirectoryisnullorempty
AKS
AKS

Reputation: 17336

Delete EMPTY Directory or folders / subfolders

I have the following folders/files.

A/B/C/D/giga.txt
A/BB/
A/CC/DD/fifa.jpg
A/ZZZ/1/a.txt
A/ZZZ/2/b.png
A/ZZZ/3/

How can I code in Gradle/Groovy to delete ONLY the empty directories/subfolders. i.e. Delete "A/BB", "A/ZZZ/3" in the above sample example. Real case has lot of such folders.

I tried 

tasks.withType(Delete) { includeEmptyDirs = true }

didn't work

tasks.withType(Delete) { includeEmptyDirs = false }

didn't work

I don't want to use Gradle > calling > Ant way as that'd be my last resort. Also, don't want to delete each empty folder by writing explicit delete statement per empty folder.

Case 2: If I run the following:

delete fileTree (dir: "A", include: "**/*.txt")

this above cmd will remove any .txt file under folder A and any subfolder under it. Now, this will make "A/ZZZ/1" a valid candidate for "empty folder" which I would want to delete as well.

Upvotes: 1

Views: 6193

Answers (2)

Ari Maniatis
Ari Maniatis

Reputation: 8668

If you want to delete all the folders that themselves only contain empty folders, this code might help.

    def emptyDirs = []

    project.fileTree(dir: destdir).visit { 
        def File f = it.file

        if (f.isDirectory() ) {
            def children = project.fileTree(f).filter { it.isFile() }.files
            if (children.size() == 0) {
                emptyDirs << f
            }
        }
    }

    // reverse so that we do the deepest folders first
    emptyDirs.reverseEach { it.delete() }

Upvotes: 3

Michael Easter
Michael Easter

Reputation: 24498

Using the Javadoc for FileTree, consider the following to delete empty dirs under "A". Uses Gradle 1.11:

task deleteEmptyDirs() {
    def emptyDirs = []

    fileTree (dir: "A").visit { def fileVisitDetails ->
        def file = fileVisitDetails.file

        if (file.isDirectory() && (file.list().length == 0)) {
            emptyDirs << file
        }
    }    

    emptyDirs.each { dir -> dir.delete() }
}

Upvotes: 3

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