lua was running twice by default, server/client

Makefile

@@ -195,6 +195,8 @@ maps/%.bsp: %.bsp
 	rm -v "$(MOD_DIR)/maps/graphs/navgen.ain"
 
 
+_comments:
+	true
 # only ents works on an existing bsp,
 # which are not typically left "in place" for this operation
 #%_ents.bsp: %.vmf
@@ -279,3 +281,5 @@ lint: ttt_terrorcon_v2.bspzip-addlist
 
 hl2pid:
 	$(WINPGREP_BIN) $(WINPGREP_FLAGS) hl2.exe
+killhl2:
+	taskkill -f -pid `$(WINPGREP_BIN) $(WINPGREP_FLAGS) hl2.exe`

lua/nav_generate.lua

@@ -2,8 +2,13 @@ function string_repr(str)
     return string.format("%q", str):gsub("\\\n", "\\n")
 end
 
+
 local function main()
 	local state = file.Read('runme.txt')
+	if SERVER then
+		return
+	end
+	print( string.format("nav_generate:main: SERVER=%s CLIENT=%s", SERVER, CLIENT) )
 	if state == '' then
 		print( "nav_generate:main:: start nav_generate ..." )
 		RunConsoleCommand( "nav_generate", nil )
@@ -18,7 +23,7 @@ local function main()
 		print( "nav_generate:main:ng_2: write state: ng_f ... done " )
 		print( "nav_generate:main:ng_2: manual tasks: ['quit']" )
 		return
-	else:
+	else
 		print( "nav_generate:main:E: unhandled state: " )
 		print ( string_repr(state) )
 		print( "nav_generate:main:E: manual tasks: ['quit']" )