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knife autocompletion

Frank Louwers authored on 30/06/2011 at 13:19:50
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+#compdef knife
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+
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+# These flags should be available everywhere according to man knife
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+knife_general_flags=( --help --server-url --key --config --editor --format --log_level --logfile --no-editor --user --print-after --version --yes )
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+
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+# knife has a very special syntax, some example calls are:
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+# knife status
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+# knife cookbook list
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+# knife role show ROLENAME
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+# knife data bag show DATABAGNAME
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+# knife role show ROLENAME --attribute ATTRIBUTENAME
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+# knife cookbook show COOKBOOKNAME COOKBOOKVERSION recipes
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+
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+# 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
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+_knife() {
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+  local curcontext="$curcontext" state line
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+  typeset -A opt_args
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+  cloudproviders=(bluebox ec2 rackspace slicehost terremark)
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+  _arguments \
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+    '1: :->knifecmd'\
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+    '2: :->knifesubcmd'\
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+    '3: :->knifesubcmd2' \
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+    '4: :->knifesubcmd3' \
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+    '5: :->knifesubcmd4' \
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+    '6: :->knifesubcmd5'
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+  
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+  case $state in
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+  knifecmd)
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+    compadd -Q "$@" bootstrap client configure cookbook "cookbook site" "data bag" exec index node recipe role search ssh status windows $cloudproviders
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+  ;;
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+  knifesubcmd)
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+    case $words[2] in
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+    (bluebox|ec2|rackspace|slicehost|terremark)
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+      compadd "$@" server images
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+    ;;
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+    client)
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+      compadd -Q "$@" "bulk delete" list create show delete edit reregister
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+    ;;
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+    configure)
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+      compadd "$@" client
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+    ;;
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+    cookbook)
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+      compadd -Q "$@" test list create download delete "metadata from" show "bulk delete" metadata upload
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+    ;;
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+    node)
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+     compadd -Q "$@" "from file" create show edit delete list run_list "bulk delete"
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+    ;;
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+    recipe)
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+     compadd "$@" list
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+    ;;
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+    role)
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+      compadd -Q "$@" "bulk delete" create delete edit "from file" list show
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+    ;; 
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+    windows)
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+      compadd "$@" bootstrap
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+    ;;
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+    *)
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+    _arguments '2:Subsubcommands:($(_knife_options1))'
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+    esac
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+   ;;
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+   knifesubcmd2)
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+    case $words[3] in
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+     server)
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+      compadd "$@" list create delete
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+    ;;
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+     images)
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+      compadd "$@" list
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+    ;;
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+     site)
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+      compadd "$@" vendor show share search download list unshare
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+    ;;
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+     (show|delete|edit)
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+     _arguments '3:Subsubcommands:($(_chef_$words[2]s_remote))'
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+    ;;
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+    (upload|test)
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+     _arguments '3:Subsubcommands:($(_chef_$words[2]s_local) --all)'
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+    ;;
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+    list)
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+     compadd -a "$@" knife_general_flags
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+    ;;
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+    bag)
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+      compadd -Q "$@" show edit list "from file" create delete
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+    ;;
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+    *)
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+      _arguments '3:Subsubcommands:($(_knife_options2))'
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+    esac
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+   ;;
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+   knifesubcmd3)
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+     case $words[3] in
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+      show)
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+       case $words[2] in
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+       cookbook)
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+          versioncomp=1
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+          _arguments '4:Cookbookversions:($(_cookbook_versions) latest)'
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+       ;;
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+       (node|client|role)
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+         compadd "$@" --attribute
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+       esac
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+     esac
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+     case $words[4] in
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+     (show|edit)
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+     _arguments '4:Subsubsubcommands:($(_chef_$words[2]_$words[3]s_remote))'
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+    ;;
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+     file)
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+     _arguments '*:file or directory:_files -g "*.(rb|json)"'
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+    ;;
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+      list)
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+     compadd -a "$@" knife_general_flags
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+    ;;
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+        *)
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+       _arguments '*:Subsubcommands:($(_knife_options3))'
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+    esac
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+    ;;
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+    knifesubcmd4)
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+      if (( versioncomp > 0 )); then
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+        compadd "$@" attributes definitions files libraries providers recipes resources templates
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+      else
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+       _arguments '*:Subsubcommands:($(_knife_options2))'
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+      fi
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+    ;; 
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+    knifesubcmd5) 
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+      _arguments '*:Subsubcommands:($(_knife_options3))'
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+   esac
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+}
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+
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+# Helper functions to provide the argument completion for several depths of commands
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+_knife_options1() {
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+ ( for line in $( knife $words[2] --help | grep -v "^knife" ); do echo $line | grep "\-\-"; done )
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+}
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+
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+_knife_options2() {
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+ ( for line in $( knife $words[2] $words[3] --help | grep -v "^knife" ); do echo $line | grep "\-\-"; done )
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+}
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+
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+_knife_options3() {
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+ ( for line in $( knife $words[2] $words[3] $words[4] --help | grep -v "^knife" ); do echo $line | grep "\-\-"; done )
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+}
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+
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+# The chef_x_remote functions use knife to get a list of objects of type x on the server
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+_chef_roles_remote() {
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+ (knife role list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
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+}
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+
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+_chef_clients_remote() {
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+ (knife client list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
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+}
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+
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+_chef_nodes_remote() {
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+ (knife node list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
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+}
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+
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+_chef_cookbooks_remote() {
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+ (knife cookbook list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
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+}
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+
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+_chef_sitecookbooks_remote() {
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+ (knife cookbook site list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
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+}
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+
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+_chef_data_bags_remote() {
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+ (knife data bag list | grep \" | awk '{print $1}' | awk -F"," '{print $1}' | awk -F"\"" '{print $2}')
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+}
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+
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+# The chef_x_local functions use the knife config to find the paths of relevant objects x to be uploaded to the server
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+_chef_cookbooks_local() {
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+ (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)
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+}
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+
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+# This function extracts the available cookbook versions on the chef server
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+_cookbook_versions() {
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+  (knife cookbook show $words[4] | grep -v $words[4] | grep -v -E '\]|\[|\{|\}' | sed 's/ //g' | sed 's/"//g')
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+}
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+
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+_knife "$@"