duktape/util/resolve_combined_lineno.py

#!/usr/bin/env python2
#
#  Resolve a line number in the combined source into an uncombined file/line
#  using a dist/src/metadata.json file.
#
#  Usage: $ python resolve_combined_lineno.py dist/src/metadata.json 12345
#

import os
import sys
import json

def main():
	with open(sys.argv[1], 'rb') as f:
		metadata = json.loads(f.read())
	lineno = int(sys.argv[2])

	for e in reversed(metadata['line_map']):
		if lineno >= e['combined_line']:
			orig_lineno = e['original_line'] + (lineno - e['combined_line'])
			print('%s:%d -> %s:%d' % ('duktape.c', lineno,
			                          e['original_file'], orig_lineno))
			break

if __name__ == '__main__':
	main()