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#!/usr/bin/env nix-shell
#!nix-shell -i python3 -p python3Packages.pillow
import PIL.Image
import glob
import os
import sys
if len(sys.argv) == 2 and os.path.exists(sys.argv[1]):
book_directory = sys.argv[1]
else:
print(f'Usage: {sys.argv[0]} book-directory')
exit(1)
def compress(path):
directory = os.path.dirname(os.path.realpath(path))
image = PIL.Image.open(path)
width, height = image.size
if width > 300:
image = image.resize((300, int(300 * height / width)), PIL.Image.LANCZOS)
image = image.convert('RGB')
image.save(f'{directory}/tmp.webp', 'WEBP', optimize=True, quality=85)
os.remove(path)
os.rename(f'{directory}/tmp.webp', f'{directory}/cover.webp')
for path in glob.glob(f'{book_directory}/**/cover.*', recursive=True):
compress(path)
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