src/zip_images.py

"""
Zip a (possibly nested) directory into multiple zip archives, each with CHUNK_SIZE files.
Unzipping any archive will recreate the original relative structure under INPUT_DIR.
"""

import os
from pathlib import Path
import zipfile
from tqdm import tqdm
from itertools import islice


# === CONFIG ===================================================
# ==============================================================

CHUNK_SIZE = 1000          # files per zip
EXTS       = [".png"]      # which file extensions to include. Use ["*"] for everything

INPUT_2_ZIP_DIRS = {
    "images/images1024x1024": "images_zip/images1024x1024",
    "images/custom1024x1024": "images_zip/custom1024x1024",
    "images/custom256x256_matte_white_background": "images_zip/custom256x256_matte_white_background",
    "images/custom512x512_matte_white_background": "images_zip/custom512x512_matte_white_background",
    "images/custom1024x1024_skin_tones": "images_zip/custom1024x1024_skin_tones",
    "images/images512x512_matte_white_background_categorised": "images_zip/images512x512_matte_white_background_categorised",
    "images/images512x512_matte_white_background_similars": "images_zip/images512x512_matte_white_background_similars",
    
    "segmaps/custom1024x1024": "segmaps_zip/custom1024x1024",
    "segmaps/segmaps512x512": "segmaps_zip/segmaps512x512",
}
# ==============================================================
# ==============================================================





# === HELPERS ===
def batched(iterable, n):
    it = iter(iterable)
    while True:
        batch = list(islice(it, n))
        if not batch:
            break
        yield batch

def want_file(p: Path) -> bool:
    return "*" in EXTS or p.suffix.lower() in EXTS

# === SCRIPT ===

for INPUT_DIR, ZIP_DIR in tqdm(INPUT_2_ZIP_DIRS.items()):
    INPUT_DIR = Path(INPUT_DIR)
    ZIP_DIR   = Path(ZIP_DIR)
    
    ZIP_DIR.mkdir(parents=True, exist_ok=True)

    # Collect all matching files recursively
    all_files = sorted([p for p in INPUT_DIR.rglob("*") if p.is_file() and want_file(p)])

    for idx, chunk in enumerate(tqdm(list(batched(all_files, CHUNK_SIZE)), desc="Chunks")):
        zip_path = ZIP_DIR / f"images_part_{idx:05}.zip"
        with zipfile.ZipFile(zip_path, "w", compression=zipfile.ZIP_DEFLATED) as zf:
            for f in tqdm(chunk, desc="Files in chunk", leave=False):
                # path inside zip (relative to INPUT_DIR)
                arcname = f.relative_to(INPUT_DIR)
                zf.write(f, arcname)
        print(f"Created: {zip_path} with {len(chunk)} files")

print("DONE.")