toolchain in docker-utils-0.1.27

- old
+ new

@@ -7,10 +7,11 @@
   'LANG',
   'PWD',
   'OLDPWD',
   'PS1',
   'SHELL',
+  'SHLVL',
   'USER',
   '_'
 ]
 
 require 'optparse'
@@ -27,10 +28,10 @@
   toolchain_own_args, toolchain_subcommand_args = toolchain_subcommand_args.partition.each_with_index{ |x, i| i <= subcommand_delim_pos }
   ARGV.concat(toolchain_own_args[0..-2])
 end
 
 OptionParser.new do |opts|
-  opts.on("-i", "--image", "Run within the specified toolchain image") do |image_name|
+  opts.on("-i=IMAGE", "--image=IMAGE", "Run within the specified toolchain image") do |image_name|
     options[:toolchain_image] = image_name
   end
 
   opts.on("-b", "--[no-]bind-net", "Run the command in the host's network namespace") do |v|
     options[:bind_net] = v