1#!/usr/bin/env python 2"""A command line utility to merge two JSON files. 3 4This is a python program that merges two JSON files into a single one. The 5intended use for this is to combine generated 'compile_commands.json' files 6created by CMake when performing an LLVM runtime build. 7""" 8 9import argparse 10import json 11import sys 12 13 14def main(): 15 parser = argparse.ArgumentParser(description=__doc__) 16 parser.add_argument( 17 "-o", 18 type=str, 19 help="The output file to write JSON data to", 20 default=None, 21 nargs="?", 22 ) 23 parser.add_argument( 24 "json_files", type=str, nargs="+", help="Input JSON files to merge" 25 ) 26 args = parser.parse_args() 27 28 merged_data = [] 29 30 for json_file in args.json_files: 31 try: 32 with open(json_file, "r") as f: 33 data = json.load(f) 34 merged_data.extend(data) 35 except (IOError, json.JSONDecodeError) as e: 36 print("Failed to parse {json_file}: {e}", file=sys.stderr) 37 continue 38 39 # Deduplicate by converting each entry to a tuple of sorted key-value pairs 40 unique_data = list({json.dumps(entry, sort_keys=True) for entry in merged_data}) 41 unique_data = [json.loads(entry) for entry in unique_data] 42 43 with open(args.o, "w") as f: 44 json.dump(unique_data, f, indent=2) 45 46 47if __name__ == "__main__": 48 main() 49