InkscapeExtensionUpgrade.py

import re
import os
import sys
import shutil
from tempfile import mkstemp
import subprocess

# *************************************************************
# The inkscape extension
# *************************************************************
class UpgradeExtension():
    def __init__(self):
        self.searchReplace = [
        ["^([\\b]*)str[\\s]", "type=\\1str"],
        ["OptionParser.add_option", "arg_parser.add_argument"],
        ["action=\"store\"[\\b]*[,]?[\\s]*", ""],
        [",[\\b]*,", ","],
        ["type=\"inkbool\"", "type=inkex.Boolean"],
        ["^([\\b]*)print (.+)", "\\1print\\(\\2\\)"],
        ["type=\"(.*)\"", "type=\\1"],
        ["type=string", "type=str"],
        ["isinstance\\((.*)\\.tag, basestring\\)", "isinstance\\(\\1\\.tag, str\\)"],
        ["isinstance\\((.*)\\.tag, unicode\\)", "isinstance\\(\\1\\.tag, str\\)"],
        ["isinstance\\((.*)\\.tag, stdout\\)", "isinstance\\(\\1\\.tag, sys.stdout.buffer\\)"]]

    #TODO: Get rid of dest and intead create a bakup and just replace the origional,
    # or just replace the oriugional and assume that the user already has a source copy.
    # probably a good idea to have a warn prompt first.
    def upgrade(self, source):
        """Upgrades a Inkscape 4.x extension to a 1.x one

        Args:
            source  (str): input filename, source will be over written.
        """

        print("Upgrading extension file: '" + source + "' to Inkscape 1.x")
        subprocess.call(["2to3", "-w", "-f", "all", "-f", "buffer", "-f", "idioms", "-f", "set_literal", "-f", "ws_comma", source])
        with open(source, 'r') as fin:

            fd, name = mkstemp()
            with open(name, 'w') as fout:

                for line in fin:
                    out = line
                    for pattern, replace in self.searchReplace:
                        out = re.sub(pattern, replace, out)
                    fout.write(out)
                    fout.writelines(fin.readlines())

            os.close(fd)

        shutil.move(name, source)

def traversePath(path, filter, function):
    print("Revcursing path: '" + path + "' for files ending in: '" + filter + "'")
    for root, subFolders, files in os.walk(path):
        for file in files:
            if file[len(file) - len(filter):] == filter:
                function(os.path.join(root, file))
    return

upgrader = UpgradeExtension()
rootPath = "."
if len(sys.argv) == 2:
    rootPath = sys.argv[1]
traversePath(rootPath, ".py", upgrader.upgrade)

quit()