Added more levels of zeus compeletion (#2058)

plugins/zeus/_zeus

@@ -2,10 +2,10 @@
 #autoload
 
 # in order to make this work, you will need to have the gem zeus installed
-
-# zeus zsh completion, based on adb completion
+# zeus zsh completion
 
 local -a _1st_arguments
+if [[ -e .zeus.sock ]]; then
   _1st_arguments=(
   'console:Lets you interact with your Rails application from the command line. (alias = c)'
   'cucumber:Runs cucumber.'
@@ -15,20 +15,84 @@ _1st_arguments=(
   'rake:Execute rake tasks.'
   'runner:Runs Ruby code in the context of Rails non-interactively. (alias = r)'
   'server:Launches a small web server named WEBrick which comes bundled with Ruby. (alias = s)'
-'start:Preloads the zeus environment'
   'test:Runs RSpec tests. (alias = rspec, testrb)'
   'version:Shows the version number.'
   )
-
-local expl
-local -a pkgs installed_pkgs
-
-_arguments \
-	'*:: :->subcmds' && return 0
-
-if (( CURRENT == 1 )); then
-	_describe -t commands "zeus subcommand" _1st_arguments
-	return
+else
+  _1st_arguments=(
+  'start:Preloads the zeus environment'
+  'init:Generate a zeus.json file'
+  )
 fi
 
-_files
+_rails_generate_arguments() {
+    generate_arguments=(
+      controller
+      generator
+      helper
+      integration_test
+      mailer
+      migration
+      model
+      observer
+      performance_test
+      plugin
+      resource
+      scaffold
+      scaffold_controller
+      session_migration
+      stylesheets
+    )
+}
+
+_rake_does_task_list_need_generating () {
+  if [ ! -f .rake_tasks ]; then return 0;
+  else
+    accurate=$(stat -f%m .rake_tasks)
+    changed=$(stat -f%m Rakefile)
+    return $(expr $accurate '>=' $changed)
+  fi
+}
+
+_zrake ()
+{
+    local expl
+    declare -a tasks
+
+    if [ -f Rakefile ]; then
+      if _rake_does_task_list_need_generating; then
+        echo "\nGenerating .rake_tasks..." > /dev/stderr
+        rake --silent --tasks | cut -d " " -f 2 > .rake_tasks
+      fi
+      tasks=(`cat .rake_tasks`)
+      _wanted tasks expl 'rake' compadd $tasks
+    fi
+}
+
+local expl
+local curcontext="$curcontext" state line
+typeset -A opt_args
+
+_arguments -C \
+    ':command:->command' \
+    '*::options:->options'
+
+
+case $state in
+  (command)
+    _describe -t commands "zeus subcommand" _1st_arguments
+    return
+  ;;
+
+  (options)
+    case $line[1] in
+      (rake)
+        _zrake
+      ;;
+      (generate|g|destroy|d)
+        _rails_generate_arguments
+        _wanted generate_arguments expl 'all generate' compadd -a generate_arguments
+      ;;
+    esac
+  ;;
+esac