diff --git a/lua/custom/functions.lua b/lua/custom/functions.lua
index 3e5df69..8442554 100644
--- a/lua/custom/functions.lua
+++ b/lua/custom/functions.lua
@@ -1,4 +1,3 @@
--- Alternatively, using a Lua function
 local function lines_with_preview()
   local current_file = vim.fn.fnameescape(vim.fn.expand('%'))
   local rg_command = string.format("rg --with-filename --column --line-number --no-heading --color=always --smart-case . %s", current_file)
@@ -6,4 +5,44 @@ local function lines_with_preview()
   vim.cmd(fzf_command)
 end
 
+function DevtoolsPath()
+    local devPath = vim.fn.trim(vim.fn.system('ls ' .. vim.fn.expand("%:p:h") .. ' | grep DESCRIPTION'))
+    
+    if devPath == "" then
+        devPath = vim.fn.trim(vim.fn.system('realpath ' .. vim.fn.expand("%:p:h") .. '/../'))
+        return devPath
+    else
+        devPath = vim.fn.expand('%:p:h')
+        return devPath
+    end
+end
+
 vim.api.nvim_create_user_command('LinesWithPreview', lines_with_preview, {})
+vim.api.nvim_create_autocmd({"BufNewFile", "BufRead"}, {
+    pattern = "DESCRIPTION",
+    command = "set filetype=r"
+})
+
+-- Map <C-c>wd to send devtools::document command in R
+vim.api.nvim_create_autocmd("FileType", {
+    pattern = "r",
+    callback = function()
+        vim.api.nvim_set_keymap('n', '<C-c>wd', ':RSend devtools::document("' .. DevtoolsPath() .. '")<CR>', { noremap = true, silent = true })
+    end
+})
+
+-- Map <C-c>wi to send devtools::install command in R
+vim.api.nvim_create_autocmd("FileType", {
+    pattern = "r",
+    callback = function()
+        vim.api.nvim_set_keymap('n', '<C-c>wi', ':RSend devtools::install("' .. DevtoolsPath() .. '", quick = TRUE, keepSource=TRUE, upgrade = "never")<CR>', { noremap = true, silent = true })
+    end
+})
+
+vim.api.nvim_create_autocmd("FileType", {
+    pattern = "r",
+    callback = function()
+        vim.api.nvim_set_keymap('n', '<C-c>i', ':RSend install.packages("")<Left><Left>', { noremap = true, silent = true })
+    end
+})
+