added shortcut to remove unused buffers

init.lua

@@ -1,3 +1,4 @@
 require("base")
 require("specifics")
 require("plugins")
+require("buffer_tools").init()

lua/buffer_tools.lua

@@ -0,0 +1,44 @@
+local M = {}
+
+local function get_active_buffers()
+    local active_buffers = {}
+    for tabnr = 1, vim.fn.tabpagenr("$") do
+        for _, bufnr in ipairs(vim.fn.tabpagebuflist(tabnr)) do
+            active_buffers[bufnr] = true
+        end
+    end
+    return active_buffers
+end
+
+local function get_all_buffers()
+    local all_buffers = {}
+    for bufnr = 1, vim.fn.bufnr("$") do
+        if vim.fn.buflisted(bufnr) == 1 then
+            all_buffers[bufnr] = true
+        end
+    end
+    return all_buffers
+end
+
+function M.remove_unused_buffers()
+    local active_buffers = get_active_buffers()
+    local all_buffers = get_all_buffers()
+    local buffers_to_remove = {}
+
+    for bufnr, _ in pairs(all_buffers) do
+        if active_buffers[bufnr] == nil then
+            buffers_to_remove[bufnr] = true
+        end
+    end
+
+    for bufnr, _ in pairs(buffers_to_remove) do
+        vim.cmd("bd " .. bufnr)
+    end
+end
+
+function M.init()
+    local map = require("helpers").map
+    map("n", "<Leader>b", ":lua require('buffer_tools').remove_unused_buffers()<CR>")
+end
+
+return M