if ".eye{" in svg:

return svg

segs = sorted({int(n) for n in re.findall(r'class="s s(\d+)"', svg)})

if not segs or "</style>" not in svg:

raise SystemExit("not an snk svg-only snake file")

half = (len(segs) + 1) // 2

css = (",".join(f".s{n}" for n in segs[:half]) + f"{{fill:{BLUE}}}"

+ ",".join(f".s{n}" for n in segs[half:]) + f"{{fill:{YELLOW}}}.eye{{fill:{EYE}}}")

if no_bar:

svg = re.sub(r'<rect class="u u[0-9a-z]+"[^>]*/>', "", svg)

svg = re.sub(r"@keyframes u[0-9a-z]+\{.*?\}\}", "", svg) # keyframe blocks

svg = re.sub(r"\.u(?:\.u[0-9a-z]+|[0-9a-z]*)\{[^}]*\}", "", svg) # .u / .uN / .u.uN rules

vb = re.search(r'viewBox="(-?[0-9.]+) (-?[0-9.]+) ([0-9.]+) ([0-9.]+)"', svg)

x0, y0, w, _ = map(float, vb.groups())

h = 7 * CELL + CELL - y0 # grid + one cell of air

svg = svg.replace(vb.group(0), f'viewBox="{x0:g} {y0:g} {w:g} {h:g}"', 1)

svg = re.sub(r'\bheight="[0-9.]+"(?=[^>]*xmlns)', f'height="{h:g}"', svg, count=1)

svg = svg.replace("</style>", css + "</style>", 1)

head = re.search(r'<rect class="s s0"[^>]*/>', svg)

ap = argparse.ArgumentParser()

ap.add_argument("--no-bar", action="store_true")

ap.add_argument("svgs", nargs="+", type=pathlib.Path)

a = ap.parse_args()

for path in a.svgs:

path.write_text(pythonize(path.read_text(encoding="utf-8"), a.no_bar), encoding="utf-8")