feat: add module luarocks.lls-addon-loader

Author: goldenstein64

.luarc.json

@@ -11,15 +11,17 @@
 			"lua_modules/share/lua/5.4/?.lua",
 			"lua_modules/share/lua/5.4/?/init.lua"
 		],
-		"version": "Lua 5.4"
+		"version": "Lua 5.5",
+		"plugin": ["./lua_modules/share/lua/5.5/luarocks/lls-addon-loader.lua"]
 	},
 	"workspace": {
 		"checkThirdParty": false,
 		"library": [
 			"${addons}/luafilesystem/module/library",
 			"${addons}/busted/module/library",
 			"${addons}/luassert/module/library",
-			"$USERPROFILE/Documents/References/luarocks/src"
+			"$USERPROFILE/Documents/References/luarocks/src",
+			"types"
 		]
 	}
 }

src/luarocks/lls-addon-loader.lua

@@ -0,0 +1,25 @@
+local thisFunction = ...
+assert(type(thisFunction) == "function", "must be loaded as a plugin from lua-language-server")
+
+local fs = require("bee.filesystem")
+local furi = require("file-uri")
+local workspace = require("workspace")
+
+local start, _, dir_sep = string.find(package.path, "([/\\])luarocks%1%?%.lua$")
+assert(start, "could not replace path")
+package.path = string.sub(package.path, 1, start - 1) .. dir_sep .. "?.lua"
+
+local cfg = require("luarocks.core.cfg") --[[@as luarocks.core.cfg]]
+require("luarocks.loader")
+
+local workspaceRoot = fs.path(furi.decode(workspace.rootUri))
+local lua_modules = workspaceRoot / "lua_modules"
+if fs.exists(lua_modules:string()) then
+	print("luarocks-build-lls-addon: configured workspace as project directory")
+	-- re-initialize cfg with the project directory (loads in the project config from ./.luarocks)
+	cfg.init({ project_dir = workspaceRoot:string() })
+	-- add ./lua_modules as one of the queryable rocks trees
+	table.insert(cfg.rocks_trees, 1, { name = "project", root = lua_modules:string() } --[[@as luarocks.core.Tree]])
+end
+
+print("luarocks-build-lls-addon: loader finished!")