mods that hopefully work for a TechAge-based pack

mods/toolranks/.github/workflows/build.yml

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+name: Build
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: apt
+      run: sudo apt-get install -y luarocks
+    - name: luacheck install
+      run: luarocks install --local luacheck
+    - name: luacheck run
+      run: $HOME/.luarocks/bin/luacheck ./

mods/toolranks/.luacheckrc

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+unused_args = false
+allow_defined_top = true
+
+globals = {
+    "minetest",
+}
+
+read_globals = {
+    string = {fields = {"split"}},
+    table = {fields = {"copy", "getn"}},
+
+    -- Builtin
+    "vector", "ItemStack",
+    "dump", "DIR_DELIM", "VoxelArea", "Settings",
+
+    -- MTG
+    "default", "sfinv", "creative",
+}

mods/toolranks/README.md

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+# minetest-toolranks [toolranks]
+
+Minetest tool ranks mod
+
+Tools gain levels for digging nodes. Higher level tools dig faster and take longer to wear out.
+
+## Are you a mod developer?
+
+Does one of your mods add new tools?
+If so, to support this mod, add this code to your mod, after your tool's code:
+
+```lua
+if minetest.get_modpath("toolranks") then
+    minetest.override_item("mymod:mytool", {
+        original_description = "My Tool",
+        description = toolranks.create_description("My Tool"),
+        after_use = toolranks.new_afteruse
+    })
+    end
+end
+```
+
+Or alternatively, you can use the helper function:
+
+```lua
+toolranks.add_tool("mymod:mytool")
+```

mods/toolranks/depends.txt

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+default

mods/toolranks/init.lua

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+local mod_storage = minetest.get_mod_storage()
+local S = minetest.get_translator("toolranks")
+
+toolranks = {}
+
+toolranks.colors = {
+  grey = minetest.get_color_escape_sequence("#9d9d9d"),
+  green = minetest.get_color_escape_sequence("#1eff00"),
+  gold = minetest.get_color_escape_sequence("#ffdf00"),
+  white = minetest.get_color_escape_sequence("#ffffff")
+}
+
+local max_speed = tonumber(minetest.settings:get("toolranks_speed_multiplier")) or 2.0
+local max_use = tonumber(minetest.settings:get("toolranks_use_multiplier")) or 2.0
+local max_level = tonumber(minetest.settings:get("toolranks_levels")) or 10
+local level_digs = tonumber(minetest.settings:get("toolranks_level_digs")) or 500
+local level_multiplier = 1 / max_level
+
+function toolranks.get_tool_type(description)
+  if not description then
+    return "tool"
+  else
+    local d = string.lower(description)
+    if string.find(d, "pickaxe") then
+      return "pickaxe"
+    elseif string.find(d, "axe") then
+      return "axe"
+    elseif string.find(d, "shovel") then
+      return "shovel"
+    elseif string.find(d, "hoe") then
+      return "hoe"
+    elseif string.find(d, "sword") then
+      return "sword"
+    else
+      return "tool"
+    end
+  end
+end
+
+function toolranks.get_level(uses)
+  if type(uses) == "number" and uses > 0 then
+    return math.min(max_level, math.floor(uses / level_digs))
+  end
+  return 0
+end
+
+function toolranks.create_description(name, uses)
+  local description = name
+  local tooltype = toolranks.get_tool_type(description)
+  local newdesc = S(
+    "@1@2\n@3Level @4 @5\n@6@Node dug: @7",
+    toolranks.colors.green,
+    description,
+    toolranks.colors.gold,
+    toolranks.get_level(uses),
+    S(tooltype),
+    toolranks.colors.grey,
+    (type(uses) == "number" and uses or 0)
+  )
+  return newdesc
+end
+
+function toolranks.new_afteruse(itemstack, user, node, digparams)
+  local itemmeta = itemstack:get_meta()
+  local itemdef = itemstack:get_definition()
+  local itemdesc = itemdef.original_description or ""
+  local dugnodes = tonumber(itemmeta:get_string("dug")) or 0
+  local lastlevel = tonumber(itemmeta:get_string("lastlevel")) or 0
+  local most_digs = mod_storage:get_int("most_digs") or 0
+  local most_digs_user = mod_storage:get_string("most_digs_user") or 0
+  local pname = user:get_player_name()
+  if not pname then return itemstack end -- player nil check
+
+  if digparams.wear > 0 then -- Only count nodes that spend the tool
+    dugnodes = dugnodes + 1
+    itemmeta:set_string("dug", dugnodes)
+  end
+
+  if dugnodes > most_digs then
+    if most_digs_user ~= pname then -- Avoid spam.
+      minetest.chat_send_all(S(
+        "Most used tool is now a @1@2@3 owned by @4 with @5 uses.",
+        toolranks.colors.green,
+        itemdesc,
+        toolranks.colors.white,
+        pname,
+        dugnodes
+      ))
+    end
+    mod_storage:set_int("most_digs", dugnodes)
+    mod_storage:set_string("most_digs_user", pname)
+  end
+
+  if itemstack:get_wear() > 60135 then
+    minetest.chat_send_player(user:get_player_name(), S("Your tool is about to break!"))
+    minetest.sound_play("default_tool_breaks", {
+      to_player = pname,
+      gain = 2.0,
+    })
+  end
+
+  local level = toolranks.get_level(dugnodes)
+  if lastlevel < level then
+    local levelup_text = S(
+      "Your @1@2@3 just leveled up!",
+      toolranks.colors.green,
+      itemdesc,
+      toolranks.colors.white
+    )
+    minetest.chat_send_player(user:get_player_name(), levelup_text)
+    minetest.sound_play("toolranks_levelup", {
+      to_player = pname,
+      gain = 2.0,
+    })
+	-- Make tool better by modifying tool_capabilities (if defined)
+    if itemdef.tool_capabilities then
+      local speed_multiplier = 1 + (level * level_multiplier * (max_speed - 1))
+      local use_multiplier = 1 + (level * level_multiplier * (max_use - 1))
+      local caps = table.copy(itemdef.tool_capabilities)
+
+      caps.full_punch_interval = caps.full_punch_interval and (caps.full_punch_interval / speed_multiplier)
+      caps.punch_attack_uses = caps.punch_attack_uses and (caps.punch_attack_uses * use_multiplier)
+
+      for _,c in pairs(caps.groupcaps) do
+        c.uses = c.uses * use_multiplier
+        for i,t in ipairs(c.times) do
+          c.times[i] = t / speed_multiplier
+        end
+      end
+      itemmeta:set_tool_capabilities(caps)
+	end
+  end
+
+  -- Old method for compatibility with tools without tool_capabilities defined
+  local wear = digparams.wear
+  if level > 0 and not itemdef.tool_capabilities then
+    local use_multiplier = 1 + (level * level_multiplier * (max_use - 1))
+    wear = wear / use_multiplier
+  end
+
+  itemmeta:set_string("lastlevel", level)
+  itemmeta:set_string("description", toolranks.create_description(itemdesc, dugnodes))
+  itemstack:add_wear(wear)
+  return itemstack
+end
+
+-- Helper function
+function toolranks.add_tool(name)
+  local desc = ItemStack(name):get_definition().description
+  minetest.override_item(name, {
+    original_description = desc,
+    description = toolranks.create_description(desc),
+    after_use = toolranks.new_afteruse
+  })
+end
+
+-- Sword
+toolranks.add_tool("default:sword_wood")
+toolranks.add_tool("default:sword_stone")
+toolranks.add_tool("default:sword_steel")
+toolranks.add_tool("default:sword_bronze")
+toolranks.add_tool("default:sword_mese")
+toolranks.add_tool("default:sword_diamond")
+
+-- Pickaxe
+toolranks.add_tool("default:pick_wood")
+toolranks.add_tool("default:pick_stone")
+toolranks.add_tool("default:pick_steel")
+toolranks.add_tool("default:pick_bronze")
+toolranks.add_tool("default:pick_mese")
+toolranks.add_tool("default:pick_diamond")
+
+-- Axe
+toolranks.add_tool("default:axe_wood")
+toolranks.add_tool("default:axe_stone")
+toolranks.add_tool("default:axe_steel")
+toolranks.add_tool("default:axe_bronze")
+toolranks.add_tool("default:axe_mese")
+toolranks.add_tool("default:axe_diamond")
+
+-- Shovel
+toolranks.add_tool("default:shovel_wood")
+toolranks.add_tool("default:shovel_stone")
+toolranks.add_tool("default:shovel_steel")
+toolranks.add_tool("default:shovel_bronze")
+toolranks.add_tool("default:shovel_mese")
+toolranks.add_tool("default:shovel_diamond")

mods/toolranks/locale/toolranks.en.tr

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+# textdomain: toolranks
+@1@2@n@3Level @4 @5@n@6Node dug: @7=@1@2@n@3Level @4 @5@n@6Node dug: @7
+pickaxe=pickaxe
+axe=axe
+shovel=shovel
+hoe=hoe
+sword=sword
+tool=tool
+Most used tool is now a @1@2@3 owned by @4 with @5 uses.=Most used tool is now a @1@2@3 owned by @4 with @5 uses.
+Your tool is about to break!=Your tool is about to break!
+Your @1@2@3 just leveled up!=Your @1@2@3 just leveled up!

mods/toolranks/locale/toolranks.fr.tr

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+# textdomain: toolranks
+@1@2@n@3Level @4 @5@n@6Node dug: @7=@1@2@n@3@5 niveau @4@n@6Blocks minés : @7
+pickaxe=pioche
+axe=hache
+shovel=pelle
+hoe=houe
+sword=épée
+tool=outil
+Most used tool is now a @1@2@3 owned by @4 with @5 uses.=L’outil le plus utilisé est désormais @1@2@3 appartenant à @4 avec @5 utilisations.
+Your tool is about to break!=Votre outil va se casser !
+Your @1@2@3 just leveled up!=Votre @1@2@3 a gagné un niveau !

mods/toolranks/mod.conf

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+name = toolranks
+depends = default

mods/toolranks/settingtypes.txt

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+# Number of tool levels
+toolranks_levels (Levels) int 10
+# Number of nodes that need to be dug to reach the next tool level
+toolranks_level_digs (Digs per level) int 500
+# Dig speed multiplier at maximum tool level (1.0 to disable)
+toolranks_speed_multiplier (Dig speed multiplier) float 2.0 1.0 10.0
+# Durability multiplier at maximum tool level (1.0 to disable)
+toolranks_use_multiplier (Durability multiplier) float 2.0 1.0 10.0