RE: lists in kickstart templates

[Joe Linoff]

Hi Folks:

I managed to figure it out. In the hopes that it might be useful to
others, here is a snippet that allows you to update a global list of
users and then operate on it using cheetah directly.

The trick is to assign the list append operation to a dummy variable.

1 #set global global_users = []
    2 #def add_user($user)
    3   ## Function to do user stuff.
    4   ## In this case, we are only updating the global variable.
    5   ## The trick is to assign the append operation to a dummy
variable.
    6   #set x = $global_users.append($user)
    7 #end def
    8
    9 #set sysname = $getVar($name)
   10 #if 'vm-01' in $sysname
   11   $add_user('wombat')
   12   $add_user('foo')
   13   $add_user('bar')
   14   $add_user('spam')
   15 #elif 'vm-02' in $sysname
   16   $add_user('whiskers')
   17   $add_user('fluffy')
   18 #end if
   19
   20 #for user in $global_users
   21   setup-phase1 $user
   22 #end for
   23
   24 #for user in $global_users
   25   setup-phase2 $user
   26 #end for

Regards,

Joe

-----Original Message-----
From: Joe Linoff 
Sent: Tuesday, February 01, 2011 3:46 PM
To: cobbler mailing list
Cc: Joe Linoff
Subject: lists in kickstart templates

Hi Folks:

I want to something like this in a cobbler kickstart template.

1 #set global users_for_this_vm = ()
   2
   3 #def add_to_list($item)
   4   ## Funtion to add to the global user list.
   5   users_for_this_vm.append($item)  <-- this is where I am
confused!!
   6 #end def
   7
   8 ## Define the users for this platform.
   9 #set system_name=$getVar($name)
  10 #if 'plat01' in $system_name
  11   $add_to_list("bob")
  12   $add_to_list("ted")
  13   $add_to_list("sarah")
  14 #elif 'plat02' in $system_name
  15   $add_to_list("fred")
  16   $add_to_list("wilma")
  17 #end if
  18 
  19 #for $user in $users_for_this_vm
  20   phase1 $user
  21 #end for
  22 
  23 #for $user in $users_for_this_vm
  24
setup-special-stuff-that-must-be-done-after-all-users-are-added-in-phase
1 $user
  25 #end for

The basic idea is to update a global list with the specific user names
for a specific VM so that I can post-process the users after an initial
setup. The problem is that I don't know how to append to lists in
cheetah.

I suppose that I could do it by updating a shell script variable but I
was hoping that there was a way to do it in cheetah. Here is how I might
do it using the shell but I wouldn't be able to call cheetah functions.

1 users_for_this_vm=()
   2 
   3 #def add_to_list($item)
   4   ## Funtion to add to the global user list.
   5   users_for_this_vm=($item $users_for_this_vm)
   6 #end def
   7
   8 ## Define the users for this platform.
   9 #set system_name=$getVar($name)
  10 #if 'plat01' in $system_name
  11  $add_to_list("bob")
  12  $add_to_list("ted")
  13  $add_to_list("sarah")
  14 #elif 'plat02' in $system_name
  15  $add_to_list("fred")
  16  $add_to_list("wilma")
  17 #end if
  18
  19 for user in ${users_for_this_vm[@]} ; do
  20   phase1 $user
  21 done
  22 
  23 for user in ${users_for_this_vm[@]} ; do
  24
setup-special-stuff-that-must-be-done-after-all-users-are-added-in-phase
1 $user
  25 done

Is there a way to accomplish this?

Best regards,

Joe