remove scratch winutils and use input to alter fs

lua/lib/fs_update.lua

@@ -0,0 +1,52 @@
+local api = vim.api
+local system = function(v) api.nvim_call_function('system', { v }) end
+local update_view = require 'lib/winutils'.update_view
+local refresh_tree = require 'lib/state'.refresh_tree
+local refresh_git = require 'lib/git'.refresh_git
+
+local rm = require 'lib/fs'.rm
+local rename = require 'lib/fs'.rename
+
+local input = function(v)
+    local param
+    if type(v) == 'string' then param = { v } else param = v end
+    return api.nvim_call_function('input', param)
+end
+
+local function create_file(path)
+    -- TODO: create files dynamically
+    local new_file = input("Create file: " .. path)
+    local new_path = path .. new_file
+    if string.match(new_file, '.*/$') then
+        system('mkdir -p ' .. new_path)
+    else
+        system('touch ' .. new_path)
+    end
+    refresh_git()
+    refresh_tree()
+    update_view()
+end
+
+local function remove_file(filename, path)
+    local confirm = input("Remove " .. filename .. " ? y/n: ")
+    if string.match(confirm, 'y.*$') ~= nil then
+        rm(path .. filename)
+        refresh_git()
+        refresh_tree()
+        update_view()
+    end
+end
+
+local function rename_file(filename, path)
+    local new_path = input({"Rename file " .. filename .. " : ", path .. filename})
+    rename(path .. filename, new_path)
+    refresh_git()
+    refresh_tree()
+    update_view()
+end
+
+return {
+    create_file = create_file;
+    remove_file = remove_file;
+    rename_file = rename_file;
+}