Python script for collecting Xamarin.Forms or .NET MAUI named font glyphs

WalkThru.py

#! /usr/bin/env python3

# This script will recursively walk through all of the .xaml files
# in a project and collect the names of the icon font glyphs  
# For a line that contains the following markup
# Glyph="{x:Static icons:MaterialDesignIconFont.AccountEditOutline}"/>
# It would return account-edit-outline
#
# Usage:
# WalkThru.py project-folder IconFontAlias

import os
import sys
from glob import glob

# Convert the C# ThisName back to this-name
def DotNetNameToTtfName(glyph):
    newGlyph = []
    for char in glyph:
        if char.isupper():
            if len(newGlyph) > 0:
                newGlyph.append('-')

        newGlyph.append(char.lower())

    return ''.join(newGlyph)

if len(sys.argv) < 3:
	print("Usage:")
	print("WalkThru.py project-folder IconFontAlias")
	sys.exit(1)


rootdir = sys.argv[1]
fontPattern = sys.argv[2]
# fontPattern = 'icons:MaterialDesignIconFont'

# Add the object separator to allow matches only on whole names
fontPattern += '.'

ln = len(fontPattern)
glyphs = []

# recursively get all of the xaml file names
files = [f for f in glob(rootdir+'/**/*.xaml', recursive=True) if os.path.isfile(f)]

for f in files:
    # read the file
    xamlFile = open(f, 'r')
    lines = xamlFile.readlines()
    xamlFile.close

    # check each lines
    for l in lines:
        match = l.find(fontPattern)
        if match != -1:
            s = l[match:]
            match = s.find('}')
            if match != -1:
                # trim off the "}" and everything after it
                s = s[0:match]

                # trim off the fontPattern
                s = s[ln:]

                # add to the list
                if s not in glyphs:
                    glyphs.append(s)

glyphs.sort()

for g in glyphs:
    print(DotNetNameToTtfName(g))