From 257b9ab753ed9ec3355df57ce6f4373c823d43d4 Mon Sep 17 00:00:00 2001
From: rxi <rxi@users.noreply.github.com>
Date: Sun, 24 May 2020 17:34:23 +0100
Subject: [PATCH] Added `core.temp_filename()`

---
 data/core/init.lua | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/data/core/init.lua b/data/core/init.lua
index 691fab1..0836440 100644
--- a/data/core/init.lua
+++ b/data/core/init.lua
@@ -120,8 +120,34 @@ function core.init()
 end
 
 
+math.randomseed(system.get_time() * 1000)
+
+local function uid()
+  return string.gsub("xxxxxx", ".", function()
+    local chars = "0123456789abcdefghijklmnopqrstuvwxyz"
+    local n = math.random(#chars)
+    return chars:sub(n, n)
+  end)
+end
+
+local temp_file_prefix = ".temp_" .. uid()
+
+local function delete_temp_files()
+  for _, filename in ipairs(system.list_dir(EXEDIR)) do
+    if filename:find(temp_file_prefix, 1, true) == 1 then
+      os.remove(EXEDIR .. PATHSEP .. filename)
+    end
+  end
+end
+
+function core.temp_filename(ext)
+  return EXEDIR .. PATHSEP .. temp_file_prefix .. uid() .. (ext or "")
+end
+
+
 function core.quit(force)
   if force then
+    delete_temp_files()
     os.exit()
   end
   local dirty_count = 0