music file organization scripts

datefix.sh

#!/bin/fish

# Sets the created date of each directory
# to the date of its *oldest* contained file.
# rewritten from: https://stackoverflow.com/a/40173154/1431900
# 
# ```
# dir_before/
#   wow_song/ @ 1/3/20 <-----------| :^(
#       wow_song v1.wav @ 1/1/20 <-|
#       wow_song v2.wav @ 1/2/20  
#
# dir_after/
#   wow_song/ @ 1/1/20 <-----------| :^)
#       wow_song v1.wav @ 1/1/20 <-|
#       wow_song v2.wav @ 1/2/20
# ```
function "datefix"
    # for nice table formatting later, lol
    set maxDirNameLen (math (ls -l --no-permissions --no-filesize  --no-time --no-user | awk '{ print length }' | sort -n | tail -1) + 1)

    for dir in */
        cd $dir
        set dateCur (date -r . +%D\ %I:%M\%p)
        # Get name of newest file
        set newestChild (stat -f "%m:%N" * | sort -n | head -1 | cut -f2- -d:)
        # Set modification times of parent folder to match
        touch -r $newestChild .
        set dateNew (date -r . +%D\ %I:%M\%p)

        if test "$dateCur" = "$dateNew"
            printf "%-"$maxDirNameLen"s | (same)\n" $dir
        else
            printf "%-"$maxDirNameLen"s | %s -> %s\n" $dir $dateCur $dateNew
        end
        cd ../
    end
end

reduce_folder.sh

#!/bin/fish

# Create folders from the first unique word of every file
# ```
# dir_before/
#   wow_song v1.wav
#   wow_song v2.wav
#   cool_song v1.wav
#   cool_song v2.wav
#
# dir_after/
#   wow_song/
#   cool_song/
#   wow_song v1.wav
#   wow_song v2.wav
#   cool_song v1.wav
#   cool_song v2.wav
# ```
fd | grep -Eo './(\w)*' | uniq | xargs mkdir


# then, the child folders are moved in:
# ```
# dir_before/
#   wow_song/
#   cool_song/
#   wow_song v1.wav
#   wow_song v2.wav
#   cool_song v1.wav
#   cool_song v2.wav
#
# dir_after/
#   wow_song/
#       wow_song v1.wav
#       wow_song v2.wav
#   cool_song/
#       cool_song v1.wav
#       cool_song v2.wav
# ```
fd -t f | grep -Eo './(\w)*' | xargs -I {} zsh -c "mv {}* {}"