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#!/usr/bin/env python
"""A command line utility to merge two JSON files.
This is a python program that merges two JSON files into a single one. The
intended use for this is to combine generated 'compile_commands.json' files
created by CMake when performing an LLVM runtime build.
"""
import argparse
import json
import sys
def main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument(
"-o",
type=str,
help="The output file to write JSON data to",
default=None,
nargs="?",
)
parser.add_argument(
"json_files", type=str, nargs="+", help="Input JSON files to merge"
)
args = parser.parse_args()
merged_data = []
for json_file in args.json_files:
try:
with open(json_file, "r") as f:
data = json.load(f)
merged_data.extend(data)
except (IOError, json.JSONDecodeError) as e:
continue
# Deduplicate by converting each entry to a tuple of sorted key-value pairs
unique_data = list({json.dumps(entry, sort_keys=True) for entry in merged_data})
unique_data = [json.loads(entry) for entry in unique_data]
with open(args.o, "w") as f:
json.dump(unique_data, f, indent=2)
if __name__ == "__main__":
main()
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