Recursively convert epubs to mobi of a folder

to_mobi.fish

#!/usr/bin/env fish

# Check if directory path is provided as an argument
if test (count $argv) -eq 0
    echo "Usage: $argv[0] <directory>"
    exit 1
end

function list_epub
    # Check if directory path and extension are provided as arguments
    if test (count $argv) -lt 1
        echo "Usage: $argv[0] <directory>"
        exit 1
    end

    # Get the directory path and extension from the arguments
    set dir $argv[1]

    # Use the 'find' command to list files with the given extension recursively
    find $dir -type f -name "*.epub"
end

# Get the directory path from the argument
set dir $argv[1]

# Loop through each file in the directory and echo the filename
for file in (find $dir -type f -name "*.epub")
    echo $file
    set fname (basename $file)
    set d (dirname $file)
    set parts (string split -r -m 1 '.' $fname)
    set base $parts[1]
    ebook-convert $file "$d/$base.mobi"
    echo "Done converting $base to mobi"
end