wrapper.py

"""
wrapper for JSLint

reformats output (<filename>:<line>:<column>:<message>)
allows specifying JSLint options via the command line

Usage:
  $ wrapper.py <filename> [options]
options is a collection of individual "<key>:<value>" arguments
"""

import sys
import subprocess
import re


# settings -- TODO: read from configuration file
cmd = "rhino"
lint = "/home/fnd/Scripts/JSLint/jslint.js"
pattern = r"Lint at line (\d+) character (\d+): (.*)"
tempFile = "/tmp/jslint_wrap"


def main(args):
	original = filename = args[1] # original filename might differ from actually linted file
	options = args[2:]
	if options:
		filename = setOptions(filename, options)
	command = [cmd, lint, filename]
	output = subprocess.Popen(command, stdout=subprocess.PIPE).communicate()[0]
	print "\n".join(reformat(output, pattern, original))
	return True


def reformat(text, pattern, filename):
	results = []
	regex = re.compile(pattern)
	for line in text.split("\n"):
		matches = regex.search(line)
		if matches:
			line = int(matches.groups()[0])
			char = int(matches.groups()[1])
			msg = matches.groups()[2]
			results.append("%s:%d:%d:%s" % (filename, line, char, msg))
	return results


def setOptions(filename, options):
	f = open(filename, "r")
	contents = "/*jslint %s */ %s" % (" ".join(options), f.read())
	f.close()
	f = open(tempFile, "w")
	f.write(contents)
	f.close()
	return tempFile


if __name__ == "__main__":
	status = not main(sys.argv)
	sys.exit(status)