Python script to restore the metadata for a Deckset file after it is in version control, via xattr. Set your preferred Theme name and Colorscheme in top of file.

fixDecksetThemes.py

!/usr/bin/env python
#
# Quick Script to Fix the Local Settings of Deckset Themes
#
# Deckset uses `xattr` metadata which isn't preserved
# by version control.
#
# Note that Vim will also overwrite your metadata unless you `set backupcopy=yes`
#
# Brendan McAdams <brendan@boldradius.com>
#

import xattr
import glob

StandardTheme = "next"
StandardColors = "scheme9" # black with white text

print "\n For all Presentations in Filetree, setting Theme '%s' with Color Scheme '%s'..." % (StandardTheme, StandardColors)

for f in glob.glob('*/*.md'):
    print "\t *** Fixing '%s'" % f
    xattr.setxattr(f, 'com.decksetapp.Theme', StandardTheme)
    xattr.setxattr(f, 'com.decksetapp.ColorScheme', StandardColors)

print " Done."

xattr should ship with OS X's default Python. It was on my freshly installed machine with no extra install.