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import os
import argparse
import threading
import random
from concurrent.futures import ThreadPoolExecutor, as_completed
from pydrive2.auth import GoogleAuth
from pydrive2.drive import GoogleDrive
from tqdm import tqdm
from pathlib import Path
thread_local = threading.local()
def _get_thread_drive(service_account_json: str) -> GoogleDrive:
d = getattr(thread_local, "drive", None)
if d is None:
d = authenticate(service_account_json)
thread_local.drive = d
return d
def authenticate(service_account_json):
"""Authenticate PyDrive2 with a service account."""
gauth = GoogleAuth()
# Configure PyDrive2 to use service account credentials directly
gauth.settings["client_config_backend"] = "service"
gauth.settings["service_config"] = {
"client_json_file_path": service_account_json,
# Provide the key to satisfy PyDrive2 even if not impersonating
"client_user_email": "drive-bot@web-design-396514.iam.gserviceaccount.com",
}
gauth.ServiceAuth()
drive = GoogleDrive(gauth)
return drive
def list_files_with_paths(drive, folder_id, prefix=""):
"""Recursively collect all files with their relative paths from a folder."""
items = []
query = f"'{folder_id}' in parents and trashed=false"
params = {
"q": query,
"maxResults": 1000,
# Request only needed fields (Drive API v2 uses 'items')
"fields": "items(id,title,mimeType,fileSize,md5Checksum),nextPageToken",
}
for file in drive.ListFile(params).GetList():
if file["mimeType"] == "application/vnd.google-apps.folder":
sub_prefix = (f"{prefix}/{file['title']}" if prefix else file["title"])
items += list_files_with_paths(drive, file["id"], sub_prefix)
else:
rel_path = f"{prefix}/{file['title']}" if prefix else file["title"]
size = int(file.get("fileSize", 0)) if "fileSize" in file else 0
items.append(
{
"id": file["id"],
"rel_path": rel_path,
"size": size,
"md5": file.get("md5Checksum", ""),
"mimeType": file["mimeType"],
}
)
return items
def download_folder(folder_id, dest, service_account_json, workers: int):
drive = authenticate(service_account_json)
Path(dest).mkdir(parents=True, exist_ok=True)
print(f"Listing files in folder {folder_id}...")
files_with_paths = list_files_with_paths(drive, folder_id)
total = len(files_with_paths)
print(f"Found {total} files. Planning downloads...")
# Prepare tasks and skip already downloaded files by size
tasks = []
skipped = 0
for meta in files_with_paths:
out_path = Path(dest) / meta["rel_path"]
out_path.parent.mkdir(parents=True, exist_ok=True)
if (
meta["size"] > 0
and out_path.exists()
and out_path.stat().st_size == meta["size"]
):
skipped += 1
continue
tasks.append((meta["id"], str(out_path)))
print(f"Skipping {skipped} existing files; {len(tasks)} to download.")
def _download_one(file_id: str, out_path: str):
d = _get_thread_drive(service_account_json)
f = d.CreateFile({"id": file_id})
f.GetContentFile(out_path)
if len(tasks) == 0:
print("All files are up to date.")
return
with ThreadPoolExecutor(max_workers=workers) as ex:
futures = [ex.submit(_download_one, fid, path) for fid, path in tasks]
for _ in tqdm(
as_completed(futures), total=len(futures), desc="Downloading", unit="file"
):
pass
def pull(args=None):
parser = argparse.ArgumentParser(
description="Download a full Google Drive folder using a service account"
)
parser.add_argument(
"--folder-id",
dest="folder_id",
default="1fgy3wn_yuHEeMNbfiHNVl1-jEdYOfu6p",
help="Google Drive folder ID",
)
parser.add_argument(
"--output-dir",
dest="output_dir",
default="dataset/",
help="Directory to save files",
)
parser.add_argument(
"--service-account",
default="secrets/drive-json.json",
help="Path to your Google service account JSON key file",
)
parser.add_argument(
"--workers",
type=int,
default=8,
help="Number of parallel download workers",
)
parsed = parser.parse_args(args=args)
download_folder(
parsed.folder_id, parsed.output_dir, parsed.service_account, parsed.workers
)
def _index_numeric_pairs(images_dir: Path, masks_dir: Path):
assert images_dir.exists() and images_dir.is_dir(), (
f"Missing images_dir: {images_dir}"
)
assert masks_dir.exists() and masks_dir.is_dir(), f"Missing masks_dir: {masks_dir}"
img_files = sorted([p for p in images_dir.glob("*.jpg") if p.is_file()])
img_files += sorted([p for p in images_dir.glob("*.jpeg") if p.is_file()])
assert len(img_files) > 0, f"No .jpg/.jpeg images in {images_dir}"
ids = []
for p in img_files:
stem = p.stem
assert stem.isdigit(), f"Non-numeric filename encountered: {p.name}"
ids.append(int(stem))
ids = sorted(ids)
pairs = []
for i in ids:
ip_jpg = images_dir / f"{i}.jpg"
ip_jpeg = images_dir / f"{i}.jpeg"
ip = ip_jpg if ip_jpg.exists() else ip_jpeg
assert ip.exists(), f"Missing image for {i}: {ip_jpg} or {ip_jpeg}"
mp = masks_dir / f"{i}.png"
assert mp.exists(), f"Missing mask for {i}: {mp}"
pairs.append((ip, mp))
assert len(pairs) > 0, "No numeric pairs found"
return pairs
def split_test_train_val(args=None):
parser = argparse.ArgumentParser(
description="Split dataset into train/val/test = 85/5/10 with numeric pairs"
)
parser.add_argument("--images-dir", required=True, help="Path to images directory")
parser.add_argument("--masks-dir", required=True, help="Path to masks directory")
parser.add_argument(
"--out-dir",
required=True,
help="Output root dir where train/ val/ test/ will be created",
)
parser.add_argument("--seed", type=int, default=42, help="Random seed")
parser.add_argument(
"--link-method",
choices=["symlink", "copy"],
default="symlink",
help="How to place files into splits",
)
parsed = parser.parse_args(args=args)
images_dir = Path(parsed.images_dir)
masks_dir = Path(parsed.masks_dir)
out_root = Path(parsed.out_dir)
pairs = _index_numeric_pairs(images_dir, masks_dir)
n = len(pairs)
n_train = int(0.85 * n)
n_val = int(0.05 * n)
rng = random.Random(parsed.seed)
idxs = list(range(n))
rng.shuffle(idxs)
train_idx = idxs[:n_train]
val_idx = idxs[n_train : n_train + n_val]
test_idx = idxs[n_train + n_val :]
def _ensure_dirs(root: Path):
(root / "images").mkdir(parents=True, exist_ok=True)
(root / "gts").mkdir(parents=True, exist_ok=True)
def _place(src: Path, dst: Path):
if parsed.link_method == "symlink":
try:
if dst.exists() or dst.is_symlink():
dst.unlink()
os.symlink(str(src), str(dst))
except FileExistsError:
pass
else: # copy
if dst.exists():
dst.unlink()
# use hardlink if possible to be fast and space efficient
try:
os.link(str(src), str(dst))
except OSError:
import shutil
shutil.copy2(str(src), str(dst))
for split_name, split_ids in (
("train", train_idx),
("val", val_idx),
("test", test_idx),
):
root = out_root / split_name
_ensure_dirs(root)
for k in split_ids:
img_p, mask_p = pairs[k]
(root / "images" / img_p.name).parent.mkdir(parents=True, exist_ok=True)
(root / "gts" / mask_p.name).parent.mkdir(parents=True, exist_ok=True)
_place(img_p, root / "images" / img_p.name)
_place(mask_p, root / "gts" / mask_p.name)
print(
f"Split written to {out_root} | train={len(train_idx)} val={len(val_idx)} test={len(test_idx)}"
)
if __name__ == "__main__":
# also, mkdir -p dataset/
path = Path("./dataset")
path.mkdir(exist_ok=True)
# Subcommands
top = argparse.ArgumentParser(description="WireSegHR data utilities")
subs = top.add_subparsers(dest="cmd", required=True)
sp_pull = subs.add_parser("pull", help="Download dataset from Google Drive")
sp_pull.add_argument(
"--folder-id", dest="folder_id", default="1fgy3wn_yuHEeMNbfiHNVl1-jEdYOfu6p"
)
sp_pull.add_argument("--output-dir", dest="output_dir", default="dataset/")
sp_pull.add_argument("--service-account", default="secrets/drive-json.json")
sp_pull.add_argument("--workers", type=int, default=8)
sp_split = subs.add_parser(
"split_test_train_val", help="Create 85/5/10 train/val/test split"
)
sp_split.add_argument("--images-dir", required=True)
sp_split.add_argument("--masks-dir", required=True)
sp_split.add_argument("--out-dir", required=True)
sp_split.add_argument("--seed", type=int, default=42)
sp_split.add_argument(
"--link-method", choices=["symlink", "copy"], default="symlink"
)
ns = top.parse_args()
if ns.cmd == "pull":
pull(
[
"--folder-id",
ns.folder_id,
"--output-dir",
ns.output_dir,
"--service-account",
ns.service_account,
"--workers",
str(ns.workers),
]
)
elif ns.cmd == "split_test_train_val":
split_test_train_val(
[
"--images-dir",
ns.images_dir,
"--masks-dir",
ns.masks_dir,
"--out-dir",
ns.out_dir,
"--seed",
str(ns.seed),
"--link-method",
ns.link_method,
]
)
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