adding bash completion script for upstart

svn path=/nixpkgs/trunk/; revision=17304

pkgs/os-specific/linux/upstart/default.nix

@@ -1,5 +1,8 @@
 {stdenv, fetchurl}:
 
+let bashCompletion = ./upstart-bash-completion;
+in
+
 stdenv.mkDerivation {
   name = "upstart-0.3.0";
   
@@ -26,6 +29,11 @@ stdenv.mkDerivation {
     interfaceVersion = 1;
   };
 
+  postInstall = ''
+    t=$out/etc/bash_completion.d
+    ensureDir $t; cp ${bashCompletion} $t/upstart
+  '';
+
   meta = {
     homepage = "http://upstart.ubuntu.com/";
     description = "An event-based replacement for the /sbin/init daemon";

pkgs/os-specific/linux/upstart/upstart-bash-completion

@@ -0,0 +1,18 @@
+_upstart_comp_list(){
+  COMPREPLY=()
+  cur=${COMP_WORDS[COMP_CWORD]}
+  if [ $COMP_CWORD -eq 1 ]; then
+      COMPREPLY=( $(compgen -o filenames -W "$@" $cur) )
+  fi
+}
+
+_upstart_complete() { _upstart_comp_list "$(initctl list 2>&1 | grep -E "$1" | cut -f2 -d ' ')"; }
+
+_waiting(){ _upstart_complete "(waiting|instance)"; }
+_running(){ _upstart_complete "(running|instance)"; }
+_jobs(){ _upstart_comp_list "$(ls -1 /etc/event.d 2> /dev/null)"; }
+
+complete -F _jobs status
+complete -F _waiting start
+complete -F _running stop
+complete -F _running restart