https://github.com/dalen/puppet-defn

Puppet function to define Puppet functions in Puppet
https://github.com/dalen/puppet-defn

Last synced: 21 days ago
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Puppet function to define Puppet functions in Puppet

• Host: GitHub
• URL: https://github.com/dalen/puppet-defn
• Owner: dalen
• Created: 2014-01-30T20:57:21.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2014-10-28T12:08:00.000Z (about 10 years ago)
• Last Synced: 2024-10-26T19:25:32.352Z (25 days ago)
• Language: Ruby
• Size: 152 KB
• Stars: 2
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
A Puppet function to define Puppet functions in Puppet

======================================================

Requires the future parser to work.

Example:

--------

    defn(higher) |$a,$b| { if $a > $b { $a } else { $b } }

    notice(higher(3,2))

*Output:* 3

Quicksort example:

------------------

```puppet

class quicksort {

  $size=lambda() |$list| {

    reduce($list,0) |$a,$b| {

      $a+1

    }

  }

  $sort=lambda() |$list| {

    if apply($size,[$list]) > 2 {

      $pivot=$list[apply($size,[$list])/2]

      apply($sort,[filter($list) |$i| { $i < $pivot }]) + $same + apply($sort,[])

      $low=filter($list) |$i| {

        $i < $pivot

      }

      $high=filter($list) |$i| {

        $i > $pivot

      }

      $same=filter($list) |$i| {

        $i == $pivot

      }

    } elsif apply($size,[$list]) == 2 {

      if $list[0] > $list[1] {

        [$list[1], $list[0]]

      } else {

        $list

      }

    } else {

      $list

    }

  }

}

include quicksort

apply($quicksort::sort, [[3,7,4,8,6]]).each |$i| { notice($i) }

```

Known issues

------------

Nesting defn statements or referencing variables from outside of the block can

lead to undefined behaviour.

Also closures aren't supported by Puppet with lambdas.