A quick script to clean the hierarchy of .xib files as they related to .cs and .designer.cs files

xamarin_tree_clean.py

#!/usr/bin/python
import sys, os
import xml.etree.ElementTree as ET
from xml.etree.ElementTree import Element

namespace = "http://schemas.microsoft.com/developer/msbuild/2003"

def find_files_with_ext(extension):
  return [f for f in os.listdir('.') if os.path.isfile(f) and os.path.splitext(f)[1] == extension]

def find_ele_in_itemgroup(typestr):
	return "{{{0}}}ItemGroup/{{{0}}}{1}".format(namespace, typestr)

def parse_filename_and_base(path):
	fname = os.path.basename(path.replace("\\", "/"))
	fbasename = fname[:fname.find('.')]
	return (fname, fbasename)

if __name__ == "__main__":
	csproj_path = find_files_with_ext(".csproj")[0]

	print "Parsing %s" % (csproj_path)

	ET.register_namespace("", namespace)
	tree = ET.parse(csproj_path)
	root = tree.getroot()
	xibs = root.findall(find_ele_in_itemgroup("InterfaceDefinition"))

	for i in xibs:
		xib_path = i.attrib["Include"]
		xib_name, xib_basename = parse_filename_and_base(xib_path)
		code_behinds = root.findall(find_ele_in_itemgroup("Compile"))
		for cb in code_behinds:
			cs_path = cb.attrib["Include"]
			cs_name, cs_basename = parse_filename_and_base(cs_path)
			if cs_basename == xib_basename:
				lencb = len(cb)
				expected_file = "{0}.xib".format(xib_basename)
				if lencb == 0:
					ele = Element("DependentUpon")
					ele.text = expected_file
					cb.append(ele)
					print "Appending element for %s" % (cs_name)
				elif lencb == 1:
					if cb[0].text != expected_file:
						cb[0].text = expected_file
						print "Updating element for %s" % (cs_name)

	tree.write(csproj_path)