Make jump to term selector use fzf

fnl/plugin.fnl

@@ -80,7 +80,24 @@
                                            (let [code (os.execute "git rev-parse --is-inside-work-tree >/dev/null 2>&1")]
                                              (if (= code 0)
                                                  (fzf.git_files)
-                                                 (fzf.files)))))))
+                                                 (fzf.files)))))
+                   (fn jump-or-open-terminal []
+                     "If no terminal buffer exists, create one. Otherwise, open new one."
+                     (var term_count 0)
+                     (var last_id 0)
+                     (var terms [ ])
+                     (each [_ id (pairs (vim.api.nvim_list_bufs))]
+                       (let [name (vim.api.nvim_buf_get_name id)]
+                       (when (vim.startswith name "term://")
+                       (table.insert terms name)
+                       (set term_count (+ term_count 1))
+                       (set last_id id))))
+                     (if (= term_count 0)
+                       (vim.cmd.terminal)
+                       (= term_count 1)
+                       (vim.cmd.buffer last_id)
+                       (fzf.buffers { :query "term://" })))
+                   (bind! :n :<leader>t jump-or-open-terminal)))
 
   ;; Nvim surround
   (use! :kylechui/nvim-surround