6 files changed, 87 insertions, 0 deletions
diff --git a/lua/mason-core/fs.lua b/lua/mason-core/fs.lua
index 98d04a99..1621d06c 100644
--- a/lua/mason-core/fs.lua
+++ b/lua/mason-core/fs.lua
@@ -139,6 +139,8 @@ local function make_module(uv)
         return all_entries
     end
 
+    ---@param path string
+    ---@param new_path string
     function M.symlink(path, new_path)
         log.trace("fs: symlink", path, new_path)
         uv.fs_symlink(path, new_path)
diff --git a/lua/mason-core/functional/function.lua b/lua/mason-core/functional/function.lua
index f1475229..6f1806db 100644
--- a/lua/mason-core/functional/function.lua
+++ b/lua/mason-core/functional/function.lua
@@ -94,4 +94,29 @@ _.tap = _.curryN(function(fn, value)
     return value
 end, 2)
 
+---@generic T, U
+---@param value T
+---@param fn fun(value: T): U
+---@return U
+_.apply_to = _.curryN(function(value, fn)
+    return fn(value)
+end, 2)
+
+---@generic T, R, V
+---@param fn fun (args...: V[]): R
+---@param args V[]
+---@return R
+_.apply = _.curryN(function(fn, args)
+    return fn(args)
+end, 2)
+
+---@generic T, V
+---@param fn fun(...): T
+---@param fns (fun(value: V))[]
+---@param val V
+---@return T
+_.converge = _.curryN(function(fn, fns, val)
+    return fn(unpack(vim.tbl_map(_.apply_to(val), fns)))
+end, 3)
+
 return _
diff --git a/lua/mason-core/functional/init.lua b/lua/mason-core/functional/init.lua
index 04ef1534..f03eb3d5 100644
--- a/lua/mason-core/functional/init.lua
+++ b/lua/mason-core/functional/init.lua
@@ -28,6 +28,9 @@ _.F = fun.F
 _.memoize = fun.memoize
 _.lazy = fun.lazy
 _.tap = fun.tap
+_.apply_to = fun.apply_to
+_.apply = fun.apply
+_.converge = fun.converge
 
 ---@module "mason-core.functional.list"
 local list = lazy_require "mason-core.functional.list"
@@ -53,12 +56,17 @@ _.sort_by = list.sort_by
 _.uniq_by = list.uniq_by
 _.join = list.join
 _.partition = list.partition
+_.take = list.take
+_.drop = list.drop
 
 ---@module "mason-core.functional.relation"
 local relation = lazy_require "mason-core.functional.relation"
 _.equals = relation.equals
 _.prop_eq = relation.prop_eq
 _.prop_satisfies = relation.prop_satisfies
+_.path_satisfies = relation.path_satisfies
+_.min = relation.min
+_.add = relation.add
 
 ---@module "mason-core.functional.logic"
 local logic = lazy_require "mason-core.functional.logic"
@@ -93,6 +101,7 @@ _.starts_with = string.starts_with
 ---@module "mason-core.functional.table"
 local tbl = lazy_require "mason-core.functional.table"
 _.prop = tbl.prop
+_.path = tbl.path
 _.pick = tbl.pick
 _.keys = tbl.keys
 _.size = tbl.size
diff --git a/lua/mason-core/functional/list.lua b/lua/mason-core/functional/list.lua
index 2a5378fe..b40e0046 100644
--- a/lua/mason-core/functional/list.lua
+++ b/lua/mason-core/functional/list.lua
@@ -208,4 +208,28 @@ _.partition = fun.curryN(function(predicate, list)
     return partitions
 end, 2)
 
+---@generic T
+---@param n integer
+---@param list T[]
+---@return T[]
+_.take = fun.curryN(function(n, list)
+    local result = {}
+    for i = 1, math.min(n, #list) do
+        result[#result + 1] = list[i]
+    end
+    return result
+end, 2)
+
+---@generic T
+---@param n integer
+---@param list T[]
+---@return T[]
+_.drop = fun.curryN(function(n, list)
+    local result = {}
+    for i = n + 1, #list do
+        result[#result + 1] = list[i]
+    end
+    return result
+end, 2)
+
 return _
diff --git a/lua/mason-core/functional/relation.lua b/lua/mason-core/functional/relation.lua
index 94913a13..b6ba92b7 100644
--- a/lua/mason-core/functional/relation.lua
+++ b/lua/mason-core/functional/relation.lua
@@ -14,4 +14,25 @@ _.prop_satisfies = fun.curryN(function(predicate, property, tbl)
     return predicate(tbl[property])
 end, 3)
 
+---@param predicate fun(value: any): boolean
+---@param path any[]
+---@param tbl table
+_.path_satisfies = fun.curryN(function(predicate, path, tbl)
+    return predicate(vim.tbl_get(tbl, unpack(path)))
+end, 3)
+
+---@param a number
+---@param b number
+---@return number
+_.min = fun.curryN(function(a, b)
+    return b - a
+end, 2)
+
+---@param a number
+---@param b number
+---@return number
+_.add = fun.curryN(function(a, b)
+    return b + a
+end, 2)
+
 return _
diff --git a/lua/mason-core/functional/table.lua b/lua/mason-core/functional/table.lua
index e96b0157..eb673d64 100644
--- a/lua/mason-core/functional/table.lua
+++ b/lua/mason-core/functional/table.lua
@@ -10,6 +10,12 @@ _.prop = fun.curryN(function(index, tbl)
     return tbl[index]
 end, 2)
 
+---@param path any[]
+---@param tbl table
+_.path = fun.curryN(function(path, tbl)
+    return vim.tbl_get(tbl, unpack(path))
+end, 2)
+
 ---@generic T, U
 ---@param keys T[]
 ---@param tbl table<T, U>