js-list-modules

#!/usr/bin/env python3
import sys, re, json

__doc__ = """
A basic tool that lists modules imported by require.js
"""

RE_REQUIRE_JS = re.compile("require\s*\(\s*\[(.+)\]", re.MULTILINE)

def list_imports_requirejs( text ):
	"""Looks for modules imported in the given files."""
	matches = RE_REQUIRE_JS.findall(text)
	return set(json.loads("[" + (",".join(matches)) + "]"))

def command(args, output=sys.stdout):
	"""Writes the list of modules imported in the given files, one per line."""
	r = set ()
	for p in args:
		r = r.union(list_imports_requirejs(open(p).read() if p != "--" else sys.stdin.read()))
	for m in r:
		output.write(m)
		output.write("\n")
	
if __name__ == "__main__":
	command(sys.argv[1:])
	
# EOF