First version

Readme.md

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+# Online Craftguide CSM
+
+The clientside mod part of the online craftguide mod. Written by Lars Mueller aka appguru(eu) and licensed under the MIT license.
+
+## Usage
+
+Enable the mod like any other CSM using a Minetest 5.3 client with [`minetest#10003`](https://github.com/minetest/minetest/pull/10003).
+On server join, it will show a "Rendering" bar and write inventory images to the `images` folder inside it's mod directory, given that it has sufficient permissions.

init.lua

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+online_craftguide = {}
+setfenv(1, setmetatable(online_craftguide, {__index = _G}))
+if minetest.get_csm_restrictions().read_itemdefs then
+    minetest.log("Unable to render inventory images as read_itemdefs is restricted")
+    return
+end
+if not minetest.get_item_defs or not minetest.store_texture then
+    minetest.log("The online_craftguide CSM requires Minetest 5.3 with PR#10003 merged")
+    return
+end
+function render(per_step)
+    if not minetest.localplayer then
+        minetest.after(0, render)
+        return
+    end
+    per_step = per_step or 10
+    text_id = minetest.localplayer:hud_add{
+        hud_elem_type = "text",
+        name = "online_craftguide:rendering_progress",
+        position = {x=0.5, y=0.5},
+        text = "Rendering... 0%",
+        number = 0xffffff,
+        z_index = 1000
+    }
+    statbar_id = minetest.localplayer:hud_add{
+        hud_elem_type = "image",
+        text = "progress_bar_bg.png",
+        position = {x = 0.5, y = 0.5},
+        scale = {x=1, y=1},
+        z_index = 900
+    }
+    local itemdefs = minetest.get_item_defs()
+    itemdefs[""] = nil
+    local total = 0
+    for _ in pairs(itemdefs) do total = total + 1 end
+    local done = 0
+    minetest.register_globalstep(function()
+        for name, def in pairs(itemdefs) do
+            if not minetest.store_texture("[item:"..def.name, "images/"..name:gsub("%:", "_")..".png") then
+                minetest.log("Storing texture for "..def.name.." failed")
+            end
+            itemdefs[name] = nil
+            done = done + 1
+            local proportion = done/total
+            minetest.localplayer:hud_change(text_id, "text", "Rendering... "..math.floor(proportion * 100).."%")
+            minetest.localplayer:hud_change(statbar_id, "text", "progress_bar_bg.png^(progress_bar.png^([combine:256x48:"..math.floor(proportion * 256)..",0=(progress_bar.png^[noalpha)^[colorize:#4A412A:255)^[makealpha:74,65,42)")
+            if done >= per_step then
+                break
+            end
+        end
+        if done == total then
+            minetest.localplayer:hud_remove(text_id)
+            minetest.localplayer:hud_remove(statbar_id)
+        end
+    end)
+end
+minetest.after(0, render)
+setfenv(1, _G)

mod.conf

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+name = online_craftguide
+title = Online Craftguide
+author = LMD aka appguru(eu)
+description = Stores inventory images on server join for online craftguides
+