#344 renderer integration with new assertion handling

pocket/renderer.lua

@@ -5,18 +5,23 @@
 local main_view  = require("pocket.ui.main")
 local style      = require("pocket.ui.style")
 
+local core       = require("graphics.core")
 local flasher    = require("graphics.flasher")
 
 local DisplayBox = require("graphics.elements.displaybox")
 
+---@class pocket_renderer
 local renderer = {}
 
 local ui = {
     display = nil
 }
 
--- start the pocket GUI
-function renderer.start_ui()
+-- try to start the pocket GUI
+---@return boolean success, any error_msg
+function renderer.try_start_ui()
+    local status, msg = true, nil
+
     if ui.display == nil then
         -- reset screen
         term.setTextColor(colors.white)
@@ -30,12 +35,22 @@ function renderer.start_ui()
         end
 
         -- init front panel view
-        ui.display = DisplayBox{window=term.current(),fg_bg=style.root}
-        main_view(ui.display)
+        status, msg = pcall(function ()
+            ui.display = DisplayBox{window=term.current(),fg_bg=style.root}
+            main_view(ui.display)
+        end)
 
-        -- start flasher callback task
-        flasher.run()
+        if status then
+            -- start flasher callback task
+            flasher.run()
+        else
+            -- report fail and close ui
+            msg = core.extract_assert_msg(msg)
+            renderer.close_ui()
+        end
     end
+
+    return status, msg
 end
 
 -- close out the UI

pocket/startup.lua

@@ -18,7 +18,7 @@ local iocontrol = require("pocket.iocontrol")
 local pocket    = require("pocket.pocket")
 local renderer  = require("pocket.renderer")
 
-local POCKET_VERSION = "v0.6.2-alpha"
+local POCKET_VERSION = "v0.6.3-alpha"
 
 local println = util.println
 local println_ts = util.println_ts
@@ -111,9 +111,8 @@ local function main()
     -- start the UI
     ----------------------------------------
 
-    local ui_ok, message = pcall(renderer.start_ui)
+    local ui_ok, message = renderer.try_start_ui()
     if not ui_ok then
-        renderer.close_ui()
         println(util.c("UI error: ", message))
         log.error(util.c("startup> GUI render failed with error ", message))
     else