Ykhjuy

I basically want to go from this:

.

├── Alan Walker

│   ├── Different World

│   │   ├── 01 Intro.mp3

│   │   ├── 02 Lost Control.mp3

│   │   └── cover.jpg

│   └── Same World

│       ├── 01 Intro.mp3

│       └── 02 Found Control.mp3

├── Aurora

│   └── Infections Of A Different Kind Step 1

│       ├── 01 Queendom.lrc

│       ├── 02 Forgotten Love.lrc

│       └── 03 Gentle Earthquakes.mp3

└── Guns N' Roses

    └── Use Your Illusion I

        ├── 01 Right Next Door To Hell.lrc

        ├── 01 Right Next Door To Hell.mp3

        ├── 02 Dust N' Bones.lrc

        └── 02 Dust N' Bones.mp3

to this:

.

├── Alan Walker - Different World

│   ├── 01 Intro.mp3

│   ├── 02 Lost Control.mp3

│   └── cover.jpg

├── Alan Walker - Same World

│   ├── 01 Intro.mp3

│   └── 02 Found Control.mp3

├── Aurora - Infections Of A Different Kind Step 1

│   ├── 01 Queendom.lrc

│   ├── 02 Forgotten Love.lrc

│   └── 03 Gentle Earthquakes.mp3

└── Guns N' Roses - Use Your Illusion I

    ├── 01 Right Next Door To Hell.lrc

    ├── 01 Right Next Door To Hell.mp3

    ├── 02 Dust N' Bones.lrc

    └── 02 Dust N' Bones.mp3

None of the existing solutions I could find included renaming the directory itself. It'd be great to be able to do this with zmv, but I can't figure out how to.

Something like this maybe?

for topdir in */; do

    topdir_name=$( basename "$topdir" )



    for subdir in "$topdir"/*/; do

        subdir_name=$( basename "$subdir" )



        newdir="$topdir_name - $subdir_name"

        mkdir "$newdir" || continue



        mv "$subdir"/* "$newdir"

        rmdir "$subdir"

    done



    rmdir "$topdir"

done

This goes through all the top-level directories in the current directory (the band names). For each such directory, it goes through its subdirectories (the album names). For each pair of band name and album name, a new directory is created and the files from the subdirectory are moved to it. The album subdirectories are removed when they have been processed, as are the original band top-level directories.

The rmdir calls will fail if any directory contains hidden filenames or if any of the new directories failed to be created.

This is totally untested code. Run it on a backed-up copy of your files.