got most of the WebUI updated and working

Software/codegen/git_rev_macro.py

@@ -1,8 +0,0 @@
-import subprocess
-
-revision = (
-    subprocess.check_output(["git", "rev-parse", "--short=10", "HEAD"])
-    .strip()
-    .decode("utf-8")
-)
-print("-DGIT_REV='\"%s\"'" % revision)

Software/codegen/run_pre.py

@@ -3,6 +3,12 @@ env.Execute("\"$PYTHONEXE\" -m pip install jinja2")
 
 import struct2json
 import dtcs
+from os import popen
+
+git_revision = popen('git rev-parse --short HEAD').read().strip()
+
+env.Replace(PROGNAME="firmware_%s.fw" % git_revision)
+env.Append(CPPDEFINES=[('GIT_REV', '\\"{}\\"'.format(git_revision))])
 
 struct2json.struct2json()
 dtcs.build_dtcs()