commands/init: force flag [GH-3564]

CHANGELOG.md

@@ -44,6 +44,7 @@ IMPROVEMENTS:
   - commands/destroy: Exit codes changes. 0 means everything succeeded.
       1 means everything was declined. 2 means some were declined. [GH-811]
   - commands/destroy: Doesn't require box to exist anymore. [GH-1629]
+  - commands/init: force flag. [GH-3564]
   - commands/rsync-auto: Picks up and syncs provisioner folders if
       provisioners are backed by rsync.
   - commands/rsync-auto: Detects when new synced folders were added and warns

plugins/commands/init/command.rb

@@ -10,7 +10,10 @@ module VagrantPlugins
       end
 
       def execute
-        options = { output: "Vagrantfile" }
+        options = {
+          force: false,
+          output: "Vagrantfile",
+        }
 
         opts = OptionParser.new do |o|
           o.banner = "Usage: vagrant init [name] [url]"
@@ -18,6 +21,10 @@ module VagrantPlugins
           o.separator "Options:"
           o.separator ""
 
+          o.on("-f", "--force", "Overwrite existing Vagrantfile") do |f|
+            options[:force] = f
+          end
+
           o.on("--output FILE", String,
                "Output path for the box. '-' for stdout") do |output|
             options[:output] = output
@@ -31,6 +38,7 @@ module VagrantPlugins
         save_path = nil
         if options[:output] != "-"
           save_path = Pathname.new(options[:output]).expand_path(@env.cwd)
+          save_file.delete if save_path.exist? && options[:force]
           raise Vagrant::Errors::VagrantfileExistsError if save_path.exist?
         end