Add backup scrupt. Add .env config

.gitignore

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+.env
+backup/
+source/
+include/
+bin/
+lib/
+pyvenv.cfg

main.py

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+import os
+import shutil
+from datetime import datetime
+from typing import List
+import dotenv
+
+"""
+Load config
+"""
+dotenv.load_dotenv()
+CONFIG = {
+    "source_dir": os.getenv("SOURCE_DIR"),
+    "backup_dir": os.getenv("BACKUP_DIR"),
+    "max_backups": int(f"{os.getenv("MAX_BACKUPS")}") 
+}
+
+
+def copy_to_backup() -> None:
+    """
+    Copies the source dir to the backup dir.
+    """
+    timestamp = datetime.now()
+
+    src_dir = f"{CONFIG['source_dir']}"
+    dst_dir = f"{CONFIG['backup_dir']}/{timestamp.isoformat()}"
+    print(f"Copying from: {src_dir} to: {dst_dir}")
+    shutil.copytree(src_dir, dst_dir)
+
+
+def find_backups() -> List[str]:
+    """
+    List the current backups located in the backup dir.
+    """
+    path = f"{CONFIG["backup_dir"]}"
+    return os.listdir(path)
+
+
+def sort_by_oldest(path: List[str]) -> List[str]:
+    """
+    Sort the directories by age. from oldest to newest.
+    """
+    copy = path.copy()
+    copy.sort()
+    copy.reverse()
+    return copy
+
+
+def delete_backups_over_max(paths: List[str]) -> None:
+    """
+    Delete the oldest backups if the max backups has been reached.
+    """
+    max = CONFIG["max_backups"]
+    paths_sorted = sort_by_oldest(paths)
+    overshoot = len(paths_sorted) - max
+
+    for i in range(0, overshoot):
+        backup = paths_sorted[len(paths_sorted) - 1 - i]
+        path = f"{CONFIG['backup_dir']}/{backup}"
+        shutil.rmtree(path)
+
+
+def main() -> None:
+    copy_to_backup()
+    backup_dirs = find_backups()
+    if len(backup_dirs) > CONFIG["max_backups"]:
+        delete_backups_over_max(backup_dirs)
+
+    print("Done copying to destination.")
+
+
+if __name__ == "__main__":
+    main()

requirements.txt

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+python-dotenv==1.2.2