diff --git a/_knife b/_knife
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+#compdef knife
+# ------------------------------------------------------------------------------
+# Description
+# -----------
+#
+#  Completion script for Chef's knife (http://www.opscode.com/chef).
+#
+#  Source: https://github.com/robbyrussell/oh-my-zsh/tree/master/plugins/knife
+#
+# ------------------------------------------------------------------------------
+# Authors
+# -------
+#
+#  * Frank Louwers (https://github.com/franklouwers)
+#
+# ------------------------------------------------------------------------------
+# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
+# vim: ft=zsh sw=2 ts=2 et
+# ------------------------------------------------------------------------------
+
+
+# These flags should be available everywhere according to man knife
+knife_general_flags=( --help --server-url --key --config --editor --format --log_level --logfile --no-editor --user --print-after --version --yes )
+
+# knife has a very special syntax, some example calls are:
+# knife status
+# knife cookbook list
+# knife role show ROLENAME
+# knife data bag show DATABAGNAME
+# knife role show ROLENAME --attribute ATTRIBUTENAME
+# knife cookbook show COOKBOOKNAME COOKBOOKVERSION recipes
+
+# The -Q switch in compadd allow for completions of things like "data bag" without having to go through two rounds of completion and avoids zsh inserting a \ for escaping spaces
+_knife() {
+  local curcontext="$curcontext" state line
+  typeset -A opt_args
+  cloudproviders=(bluebox ec2 rackspace slicehost terremark)
+  _arguments \
+    '1: :->knifecmd'\
+    '2: :->knifesubcmd'\
+    '3: :->knifesubcmd2' \
+    '4: :->knifesubcmd3' \
+    '5: :->knifesubcmd4' \
+    '6: :->knifesubcmd5'
+  
+  case $state in
+  knifecmd)
+    compadd -Q "$@" bootstrap client configure cookbook "cookbook site" "data bag" exec index node recipe role search ssh status windows $cloudproviders
+  ;;
+  knifesubcmd)
+    case $words[2] in
+    (bluebox|ec2|rackspace|slicehost|terremark)
+      compadd "$@" server images
+    ;;
+    client)
+      compadd -Q "$@" "bulk delete" list create show delete edit reregister
+    ;;
+    configure)
+      compadd "$@" client
+    ;;
+    cookbook)
+      compadd -Q "$@" test list create download delete "metadata from" show "bulk delete" metadata upload
+    ;;
+    node)
+     compadd -Q "$@" "from file" create show edit delete list run_list "bulk delete"
+    ;;
+    recipe)
+     compadd "$@" list
+    ;;
+    role)
+      compadd -Q "$@" "bulk delete" create delete edit "from file" list show
+    ;; 
+    windows)
+      compadd "$@" bootstrap
+    ;;
+    *)
+    _arguments '2:Subsubcommands:($(_knife_options1))'
+    esac
+   ;;
+   knifesubcmd2)
+    case $words[3] in
+     server)
+      compadd "$@" list create delete
+    ;;
+     images)
+      compadd "$@" list
+    ;;
+     site)
+      compadd "$@" vendor show share search download list unshare
+    ;;
+     (show|delete|edit)
+     _arguments '3:Subsubcommands:($(_chef_$words[2]s_remote))'
+    ;;
+    (upload|test)
+     _arguments '3:Subsubcommands:($(_chef_$words[2]s_local) --all)'
+    ;;
+    list)
+     compadd -a "$@" knife_general_flags
+    ;;
+    bag)
+      compadd -Q "$@" show edit list "from file" create delete
+    ;;
+    *)
+      _arguments '3:Subsubcommands:($(_knife_options2))'
+    esac
+   ;;
+   knifesubcmd3)
+     case $words[3] in
+      show)
+       case $words[2] in
+       cookbook)
+          versioncomp=1
+          _arguments '4:Cookbookversions:($(_cookbook_versions) latest)'
+       ;;
+       (node|client|role)
+         compadd "$@" --attribute
+       esac
+     esac
+     case $words[4] in
+     (show|edit)
+     _arguments '4:Subsubsubcommands:($(_chef_$words[2]_$words[3]s_remote))'
+    ;;
+     file)
+     _arguments '*:file or directory:_files -g "*.(rb|json)"'
+    ;;
+      list)
+     compadd -a "$@" knife_general_flags
+    ;;
+        *)
+       _arguments '*:Subsubcommands:($(_knife_options3))'
+    esac
+    ;;
+    knifesubcmd4)
+      if (( versioncomp > 0 )); then
+        compadd "$@" attributes definitions files libraries providers recipes resources templates
+      else
+       _arguments '*:Subsubcommands:($(_knife_options2))'
+      fi
+    ;; 
+    knifesubcmd5) 
+      _arguments '*:Subsubcommands:($(_knife_options3))'
+   esac
+}
+
+# Helper functions to provide the argument completion for several depths of commands
+_knife_options1() {
+ ( for line in $( knife $words[2] --help | grep -v "^knife" ); do echo $line | grep "\-\-"; done )
+}
+
+_knife_options2() {
+ ( for line in $( knife $words[2] $words[3] --help | grep -v "^knife" ); do echo $line | grep "\-\-"; done )
+}
+
+_knife_options3() {
+ ( for line in $( knife $words[2] $words[3] $words[4] --help | grep -v "^knife" ); do echo $line | grep "\-\-"; done )
+}
+
+# The chef_x_remote functions use knife to get a list of objects of type x on the server
+_chef_roles_remote() {
+ (knife role list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
+}
+
+_chef_clients_remote() {
+ (knife client list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
+}
+
+_chef_nodes_remote() {
+ (knife node list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
+}
+
+_chef_cookbooks_remote() {
+ (knife cookbook list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
+}
+
+_chef_sitecookbooks_remote() {
+ (knife cookbook site list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
+}
+
+_chef_data_bags_remote() {
+ (knife data bag list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
+}
+
+# The chef_x_local functions use the knife config to find the paths of relevant objects x to be uploaded to the server
+_chef_cookbooks_local() {
+ (for i in $( grep cookbook_path $HOME/.chef/knife.rb | awk 'BEGIN {FS = "[" }; {print $2}' | sed 's/\,//g' | sed "s/'//g" | sed 's/\(.*\)]/\1/' ); do ls $i; done)
+}
+
+# This function extracts the available cookbook versions on the chef server
+_cookbook_versions() {
+  (knife cookbook show $words[4] | grep -v $words[4] | grep -v -E '\]|\[|\{|\}' | sed 's/ //g' | sed 's/"//g')
+}
+
+_knife "$@"