xpub.nl/staff/SConstruct.py

import os

for root, dirs, files in os.walk("."):
	for f in files:
		base, ext = os.path.splitext(f)
		if ext[1:].lower() in ("png", "jpg", "jpeg"):
			src = os.path.join(root, f)
			target = os.path.join(root, base + "-320x.webp")
			Command(f"{target}", f"{src}", action="convert -resize 320x $SOURCE $TARGET")

Command("staff.html", "staff.md", action="pandoc --standalone $SOURCE -o $TARGET")