autocrop

#!/usr/bin/env fish
# autocrop - Automatically trim blank edges of an image.
# Copies the original image to /tmp first in case you want to restore it later.

# settings:

# default fuzz percent
set fuzz 30

# code:

set -- script "$(basename (status filename))"

argparse -n "$script" 'h/help' 'f/fuzz=' -- $argv

if set -q _flag_h
    echo "$script - Automatically trim blank edges of an image."
    echo "Usage: $script [arguments]"
    echo
    echo "  -h/--help - Print help and exit."
    echo "  -f/--fuzz - Set \"fuzz\"; the distance that colors within are considered equal (default: $fuzz%)."
    exit
end

if set -q _flag_f
    set fuzz (string trim -c ' %' "$_flag_f")
    if not test $fuzz -ge 0; or not test $fuzz -le 100
        echo "$script: --fuzz must be a number within the range 0 to 100." >&2
        exit 1
    end
end

for file in $argv
    mkdir -p /tmp/autocrop/
    cp $file /tmp/autocrop/
    convert "$file" -fuzz "$fuzz%" -trim "$file"
end