Puppet users - Mar 2007 - A wish or possible?

Hi,

One thing I''d like to be able to do is this...

define sedfile ( $file = '''', $target = '''',
$pattern = '''', $options = ''-i -n''
, onlyif = '''' ) {
   case $file {
               '''': { err ( "Require valid filename:
''$file''" ) }
   }

   case $target {
                       '''': { err ( "Require valid target
directory:
''$target''" ) }
   }

   exec { "sedfile-$name":
               command => "sed ${options} ''${pattern}''
${file}",
               path => "/usr/bin:/usr/sbin:/bin",
               cwd => "$target",
               logoutput => "true",
               onlyif => $onlyif,
               require => $operatingsystem ? {
                                 debian => Package["sed"]
                          }
   }
}

define checkkernelparamisset ( $file = ".config", $target
"/usr/src/linux", $param = '''' ) {
   case $param {
      '''': { err ( "Required parameter to check:
''$param''" ) }
   }

   exec { "checkkernelparamisset-$name":
         command => "if !test `^grep
''${param}.*=.*[y|Y|yes|YES|Yes]''
${file}`",
         path => "/usr/bin:/usr/sbin:/bin",
         cwd => "${target}",
         require => Package["coreutils"];
   }
}

Main calling code:

$param = [ "CONFIG_MODVERSIONS", "CONFIG_NET_RADIO",
"CONFIG_SYSCTL",
"CONFIG_CRYPTO", "CONFIG_CRYPTO_HMAC",
"CONFIG_CRYPTO_AES" ]
sedfile { "mod_madwifi_${param}":
    file => "Rule.mk",
    pattern => "s/^\(${param}\) = .*/#\1 is not set/",
    onlyif => checkkernelparamisset { "mod_madwifi_${param}":
        param => "${param}";
    },
    target => "/usr/src";
}

There''s two things here that I don''t believe puppet can do
yet.

1) issuing a command multiple times by iterating through an array [ $param
code ]
2) being able to pass user supplied code segments into other user defined
code segments [ onlyif code ]

I believe these would be very useful, is there anyway I can achieve this
now?

Regards,
Andrew


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On Sunday 18 March 2007 22:28, Andrew Leach wrote:
> define sedfile ( $file = '', $target = '', $pattern =
'', $options = '-i
> -n' , onlyif = '' ) {
>    exec { "sedfile-$name":
>                command => "sed ${options} '${pattern}'
${file}",
>                path => "/usr/bin:/usr/sbin:/bin",
>                cwd => "$target",
>                logoutput => "true",
>                onlyif => $onlyif,
>                require => $operatingsystem ? {
>                                  debian => Package["sed"]
>                           }
>    }
> }
>
> define checkkernelparamisset ( $file = ".config", $target >
"/usr/src/linux", $param = '' ) {
>    exec { "checkkernelparamisset-$name":
>          command => "if !test `^grep
'${param}.*=.*[y|Y|yes|YES|Yes]'
> ${file}`",
>          path => "/usr/bin:/usr/sbin:/bin",
>          cwd => "${target}",
>          require => Package["coreutils"];
>    }
> }
>
> Main calling code:
>
> $param = [ "CONFIG_MODVERSIONS", "CONFIG_NET_RADIO",
"CONFIG_SYSCTL",
> "CONFIG_CRYPTO", "CONFIG_CRYPTO_HMAC",
"CONFIG_CRYPTO_AES" ]
> sedfile { "mod_madwifi_${param}":
>     file => "Rule.mk",
>     pattern => "s/^\(${param}\) = .*/#\1 is not set/",
>     onlyif => checkkernelparamisset { "mod_madwifi_${param}":
>         param => "${param}";
>     },
>     target => "/usr/src";
> }
>
> There's two things here that I don't believe puppet can do yet.
>
> 1) issuing a command multiple times by iterating through an array [ $param
> code ]
> 2) being able to pass user supplied code segments into other user defined
> code segments [ onlyif code ]
>
> I believe these would be very useful, is there anyway I can achieve this
> now?
1) use a define:

define my_cmd() { 
	exec { "exec_${name}":
		command => "something $name",
	}
}

my_cmd{ $array: }

2) should be achievable by implementing a ruby/puppet function and building 
the onlyif command from the arguments. See 
http://reductivelabs.com/trac/puppet/wiki/WritingYourOwnFunctions



Regards, David

- -- 
- - hallo... wie gehts heute?
- - *hust* gut *rotz* *keuch*
- - gott sei dank kommunizieren wir über ein septisches medium ;)
 -- Matthias Leeb, Uni f. angewandte Kunst, 2005-02-15
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