feat(nvim): add flatten.nvim

dots/.config/nvim/lua/plugins/configs/flatten.lua

@@ -0,0 +1,65 @@
+return {
+    {
+        "willothy/flatten.nvim",
+        priority = 1000,
+        opts = function()
+            ---@type Terminal?
+            local saved_terminal
+
+            return {
+                window = {
+                    open = "alternate"
+                },
+                callbacks = {
+                    should_block = function(argv)
+                        -- Note that argv contains all the parts of the CLI command, including
+                        -- Neovim's path, commands, options and files.
+                        -- See: :help v:argv
+
+                        -- In this case, we would block if we find the `-b` flag
+                        -- This allows you to use `nvim -b file1` instead of `nvim --cmd 'let g:flatten_wait=1' file1`
+                        return vim.tbl_contains(argv, "-b")
+
+                        -- Alternatively, we can block if we find the diff-mode option
+                        -- return vim.tbl_contains(argv, "-d")
+                    end,
+                    pre_open = function()
+                        local term = require("toggleterm.terminal")
+                        local termid = term.get_focused_id()
+                        saved_terminal = term.get(termid)
+                    end,
+                    post_open = function(bufnr, winnr, ft, is_blocking)
+                        if is_blocking and saved_terminal then
+                            -- Hide the terminal while it's blocking
+                            saved_terminal:close()
+                        else
+                            -- If it's a normal file, just switch to its window
+                            vim.api.nvim_set_current_win(winnr)
+                        end
+
+                        -- If the file is a git commit, create one-shot autocmd to delete its buffer on write
+                        -- If you just want the toggleable terminal integration, ignore this bit
+                        if ft == "gitcommit" or ft == "gitrebase" then
+                            vim.api.nvim_create_autocmd("BufWritePost", {
+                                buffer = bufnr,
+                                once = true,
+                                callback = vim.schedule_wrap(function()
+                                    vim.api.nvim_buf_delete(bufnr, {})
+                                end)
+                            })
+                        end
+                    end,
+                    block_end = function()
+                        -- After blocking ends (for a git commit, etc), reopen the terminal
+                        vim.schedule(function()
+                            if saved_terminal then
+                                saved_terminal:open()
+                                saved_terminal = nil
+                            end
+                        end)
+                    end
+                }
+            }
+        end
+    }
+}