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#!/usr/bin/env python3
import jinja2
from PIL import Image
import argparse
from pathlib import Path
import yaml
import os
import re
import hashlib
imagereg = re.compile("([a-z0-9]*)\\..*")
resreg = re.compile("([0-9]*)x([0-9]*)")
def hashfile(fname):
md5 = hashlib.md5()
print(fname)
with open(fname, "rb") as f:
for chunk in iter(lambda: f.read(4096), b""):
md5.update(chunk)
return md5
def parse_res(res):
m = resreg.match(res)
return (int(m.group(1)), int(m.group(2)))
class FileLoader(jinja2.BaseLoader):
def get_source(self, environment, template):
if not os.path.exists(template):
raise TemplateNotFound(template)
mtime = os.path.getmtime(template)
with open(template, "r") as f:
source = f.read()
return source, template, lambda: mtime == getmtime(template)
class ImageLocation:
def __init__(self, folder):
self.folder = folder
self.stuff = {}
self.unused = set()
self.existing = {}
if not os.path.isdir(folder):
os.mkdir(folder)
self.look()
self.tmpname = os.path.join(folder, "tmp")
def look(self):
for name in os.listdir(self.folder):
m = imagereg.match(name)
if m is not None:
fhash = m.group(1)
self.unused.add(fhash)
self.existing[fhash] = name
def convert(self, imgname, settings):
# First determine the hash from settings
thash = hashlib.md5(bytes(
f"{settings['res']}+{settings['ext']}" + imgname
, encoding="utf8")).hexdigest()
# Now check if it exists
if thash in self.existing:
print(f"Skipping file {imgname}[{thash}]")
return self.existing[thash], thash
# Okay convert it
fname = f"{thash}.{settings['ext']}"
print(f"Converting file {imgname} to {fname}")
im = Image.open(imgname)
im = im.resize(settings["res"], Image.ANTIALIAS)
tmpname = f"{self.tmpname}.{settings['ext']}"
im.save(tmpname)
os.rename(tmpname, os.path.join(self.folder, fname))
self.existing[thash] = fname
self.unused.add(thash)
return fname, thash
def fetch(self, imgname, settings, relto=None):
# Check if we already have it
fname, hash = self.convert(imgname, settings)
# Mark the hash as used
self.unused.remove(hash)
if relto is not None:
full = os.path.join(self.folder, fname)
return os.path.relpath(full, start=relto)
return fname
def clean(self):
print("Running cleanup")
for uhash in self.unused:
fname = os.path.join(self.folder, self.existing[uhash])
print(f"Removing file {fname}")
os.remove(fname)
class Renderer:
def __init__(self, config_file, loadpath, resolution, extension):
self.config = Renderer.__load_config(config_file)
self.loadpath = loadpath
self.scaled = None
self.settings = {
"res": parse_res(resolution),
"ext": extension,
}
def __load_config(config_file):
config = {}
with open(config_file, "r") as f:
config = yaml.safe_load(f)
print(f"Loaded config: {config}")
return config
def imgfetch_gen(self, loc, dest):
def fn(img):
return loc.fetch(img, self.settings, relto=dest)
return fn
def build_to(self, dest, template, context, loc=None, clean=False):
if loc is None:
loc = ImageLocation(os.path.join(dest, "imgs"))
jenv = jinja2.Environment(
loader = FileLoader(),
autoescape=jinja2.select_autoescape(['html', 'xml'])
)
jenv.globals.update(
imgfetch=self.imgfetch_gen(loc, dest)
)
tmpl = jenv.get_template(template)
with open(os.path.join(dest, "index.html"), "w") as f:
f.write(tmpl.render({**self.config, **context}))
if clean:
loc.clean()
parser = argparse.ArgumentParser()
parser.add_argument("--dest", "-d", default="build", help="where to put resulting files")
parser.add_argument("--size", "-s", default="1920x1080", help="size to scale web images to")
parser.add_argument("--commit", "-g", help="git commit hash to announce")
parser.add_argument("--clean", help="clean unused image files", action="store_true")
parser.add_argument("--config", "-c", default="imginfo.yml", help="where to load image definitions from")
parser.add_argument("--template", "-t", default="index.html.j2", help="html template to use")
parser.add_argument("--cgit", "-w", help="cgit repo base url")
parser.add_argument("--load", "-l", default=".", help="where to load full size images from")
parser.add_argument("--ext", "-e", default="png", help="image extension to use")
args = parser.parse_args()
context = {
"cgit": args.cgit,
"git": args.commit
}
rend = Renderer(args.config, args.load, args.size, args.ext)
rend.build_to(args.dest, args.template, context, clean=args.clean)
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