command parsing is moving to lua

CMakeLists.txt

@@ -17,3 +17,10 @@ target_include_directories(rds95 PRIVATE ${LUA_INCLUDE_DIR})
 target_link_libraries(rds95 PRIVATE m pthread pulse pulse-simple inih ${LUA_LIBRARIES})
 
 install(TARGETS rds95 DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
+
+install(CODE
+"
+  execute_process(COMMAND ${CMAKE_COMMAND} -E copy
+    \"${CMAKE_CURRENT_SOURCE_DIR}/src/command.lua\"
+    \"$ENV{HOME}/.rds95.command.lua\")
+")

src/command.lua

@@ -0,0 +1,15 @@
+cmd_output = ""
+
+if type(cmd) == "string" then
+    if cmd:sub(1, 3) == "PI=" then
+        local hex = cmd:sub(7)
+        local pi = tonumber(hex, 16)
+
+        if pi then
+            set_rds_pi(pi)
+            cmd_output = string.format("+", pi)
+        else
+            cmd_output = "Invalid hex PI"
+        end
+    end
+end

src/lua_rds.c

@@ -23,7 +23,7 @@ void run_lua(char *str, char *cmd_output) {
     int top = lua_gettop(L);
 
     char path[128];
-	snprintf(path, sizeof(path), "%s/.command95.lua", getenv("HOME"));
+	snprintf(path, sizeof(path), "%s/.rds95.command.lua", getenv("HOME"));
     if (luaL_dofile(L, path) != LUA_OK) {
         const char *err = lua_tostring(L, -1);
         fprintf(stderr, "Lua error: %s\n", err);