Add IDs to nio blocks and services - migrate from nio 2.x to 3.0

add_ids.py

# A script to add IDs to block and service resources.
# Useful for migrating a project from nio 2.x to 3.0
#
# Usage:
# Run this script from inside the etc/blocks or etc/services folders of your
# project
#
# Example:
# cd etc/blocks
# python add_ids.py
#
# Any blocks/services that don't have and ID will get an ID that is the old
# name of the block/service
from uuid import uuid4
import os
import json

for filename in os.listdir('.'):
    if not filename.endswith(".cfg"):
        continue
    print("Checking file {}".format(filename))
    try:
        with open(filename) as fd:
            file_contents = json.load(fd)
    except Exception:
        print("ERROR : Couldn't parse file {}".format(filename))

    if file_contents.get("id"):
        print("File has an ID already, skipping")
        continue

    file_contents["id"] = file_contents.get("name", str(uuid4()))
    with open(filename, 'w') as fd:
        json.dump(file_contents, fd, indent=4, separators=(',', ': '), 
                  default=str, sort_keys=True)
    print("File updated")