Allow password to be reentered on sudo if it was entered incorrectly

git-svn-id: http://svn.rubyonrails.org/rails/tools/switchtower@3371 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Allow password to be reentered on sudo if it was entered incorrectly
+
 * Use && as the command separator for the checkouts, so that errors are caught early.
 
 * Ping each SSH connection every 1s during command processing so that long-running commands don't cause the connection to timeout.
@@ -18,7 +20,7 @@
 
 * Added ssh_options variable to configure the SSH connection parameters #2734 [jerrett@bravenet.com]
 
-* Require Net::SSH 1.0.3
+* Require Net::SSH 1.0.5
 
 
 *0.9.0* (October 18th, 2005)

lib/switchtower/actor.rb

@@ -167,7 +167,7 @@ module SwitchTower
         cmd = "cat > #{path}"
         cmd << " && chmod #{options[:mode].to_s(8)} #{path}" if options[:mode]
         run(cmd, options.merge(:data => data + "\n\4")) do |ch, stream, out|
-          logger.important out, "#{stream} :: #{ch[:host]}" if out == :err
+          logger.important out, "#{stream} :: #{ch[:host]}" if stream == :err
         end
       end
     end
@@ -180,9 +180,23 @@ module SwitchTower
         logger.debug(out, "#{stream} :: #{ch[:host]}")
       end
 
+      # in order to prevent _each host_ from prompting when the password was
+      # wrong, let's track which host prompted first and only allow subsequent
+      # prompts from that host.
+      prompt_host = nil
+      
       run "sudo #{command}", options do |ch, stream, out|
         if out =~ /^Password:/
           ch.send_data "#{password}\n"
+        elsif out =~ /try again/
+          if prompt_host.nil? || prompt_host == ch[:host]
+            prompt_host = ch[:host]
+            logger.important out, "#{stream} :: #{ch[:host]}"
+            # reset the password to it's original value and prepare for another
+            # pass (the reset allows the password prompt to be attempted again
+            # if the password variable was originally a proc (the default)
+            set :password, self[:original_value][:password] || self[:password]
+          end
         else
           block.call(ch, stream, out)
         end

lib/switchtower/configuration.rb

@@ -38,6 +38,9 @@ module SwitchTower
       @variables = {}
       @now = Time.now.utc
 
+      # for preserving the original value of Proc-valued variables
+      set :original_value, Hash.new
+
       set :application, nil
       set :repository,  nil
       set :gateway,     nil
@@ -63,10 +66,14 @@ module SwitchTower
 
     alias :[]= :set
 
-    # Access a named variable. If the value of the variable is a Proc instance,
+    # Access a named variable. If the value of the variable responds_to? :call,
-    # the proc will be invoked and the return value cached and returned.
+    # #call will be invoked (without parameters) and the return value cached
+    # and returned.
     def [](variable)
-      set variable, @variables[variable].call if Proc === @variables[variable]
+      if @variables[variable].respond_to?(:call)
+        self[:original_value][variable] = @variables[variable]
+        set variable, @variables[variable].call
+      end
       @variables[variable]
     end
 

test/configuration_test.rb

@@ -207,4 +207,12 @@ class ConfigurationTest < Test::Unit::TestCase
     @config.set :scm, :subversion
     assert_equal "SwitchTower::SCM::Subversion", @config.source.class.name
   end
+
+  def test_get_proc_variable_sets_original_value_hash
+    @config.set :proc, Proc.new { "foo" }
+    assert_nil @config[:original_value][:proc]
+    assert_equal "foo", @config[:proc]
+    assert_not_nil @config[:original_value][:proc]
+    assert @config[:original_value][:proc].respond_to?(:call)
+  end
 end