Puppet users - May 2010 - Breaking down variables (and setting new ones) from within a manifest using regular expressions

Hello all!

I''m hoping for your help on what I admit is a weird and uncommon
problem.

I''m working on a module that (among other things) creates a series of
home folders. The format of the home folders looks something like
this /filesys/home/#/letter/userid where # is a number between 0-15,
letter is the first letter of the userid.

Anyhow, I''m inserting a variable into the manifest something like
this: $folders = ["/filesys/", "/filesys/home",
"/filesys/home/0", "/
filesys/home/0/x/xyz123", /filesys/home/1/a/abc123"] and etc


My problem is, I want to take that master variable and break it down
so puppet can do different things to different pieces. For example, I
was looking at making an if/else statement to take a regular
expression that would strip out a userid and make that the variable
puppet uses for the owner/group on each of the userid directories.
Else, the owner/group would be sys or whatever else.

I''m thinking of other stuff too, but my basic question is, does puppet
support using regular expressions in if/else statements like this or
am I really trying to get too crazy?

Thanks in advance for bearing with me!

--Ryan

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You probably want to use the regsubst function:
http://docs.puppetlabs.com/references/stable/function.html#regsubst

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I use this to create two variables that I can use in a cron type:

# The variable boot_time is set on the client in the /etc/init.d/
puppet-at-boot script
# as a FACTER environmental variable i.e. export
FACTER_BOOT_TIME=`date ''+%H:%M''`

$boot_hour =
regsubst($boot_time,''^([0-9]+)[:]([0-9]+)'',''\1'')
$boot_minute =
regsubst($boot_time,''^([0-9]+)[:]([0-9]+)'',''\2'')

I think you would have to create the variables first, then use the
variables in the if/else statements.

Ed

On May 7, 9:05 am, Ryan <dudei...@gmail.com>
wrote:
> Hello all!
>
> I''m hoping for your help on what I admit is a weird and uncommon
> problem.
>
> I''m working on a module that (among other things) creates a series
of
> home folders. The format of the home folders looks something like
> this /filesys/home/#/letter/userid where # is a number between 0-15,
> letter is the first letter of the userid.
>
> Anyhow, I''m inserting a variable into the manifest something like
> this: $folders = ["/filesys/", "/filesys/home",
"/filesys/home/0", "/
> filesys/home/0/x/xyz123", /filesys/home/1/a/abc123"] and etc
>
> My problem is, I want to take that master variable and break it down
> so puppet can do different things to different pieces. For example, I
> was looking at making an if/else statement to take a regular
> expression that would strip out a userid and make that the variable
> puppet uses for the owner/group on each of the userid directories.
> Else, the owner/group would be sys or whatever else.
>
> I''m thinking of other stuff too, but my basic question is, does
puppet
> support using regular expressions in if/else statements like this or
> am I really trying to get too crazy?
>
> Thanks in advance for bearing with me!
>
> --Ryan
>
> --
> You received this message because you are subscribed to the Google Groups
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> To post to this group, send email to puppet-users@googlegroups.com.
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> For more options, visit this group
athttp://groups.google.com/group/puppet-users?hl=en.
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