puppet-repl

A interactive command line tool for evaluating the puppet language.

Compatibility

Requires Puppet 3.8+ and only uses the future parser.

Installation

gem install puppet-repl

Load path

puppet-repl will load all functions from your basemodulepath and environmentpath.

This means if you run puppet module install puppetlabs-stdlib and they will be available in the repl.

Usage

Puppet-repl will only parse and evaulate your code. It will not build a catalog and try to enforce the catalog. This has a few side affects.

Type and provider code will not get run.
Nothing is created or destroyed on your system.

prepl

Example Usage

MacBook-Pro-2/tmp % prepl
Ruby Version: 2.0.0
Puppet Version: 3.8.5
Puppet Repl Version: 0.0.7
Created by: NWOps <corey@nwops.io>
Type "exit", "functions", "vars", "krt", "facts", "reset", "help" for more information.

>> ['/tmp/test3', '/tmp/test4'].each |String $path| { file{$path: ensure => present} }
  => [
     [0] "/tmp/test3",
     [1] "/tmp/test4"
 ]
 >>

Using Variables

MacBook-Pro-2/tmp % prepl
Ruby Version: 2.0.0
Puppet Version: 3.8.5
Puppet Repl Version: 0.0.7
Created by: NWOps <corey@nwops.io>
Type "exit", "functions", "vars", "krt", "facts", "reset", "help" for more information.

>>

>> $config_file = '/etc/httpd/httpd.conf'
 => "/etc/httpd/httpd.conf"
 >> file{$config_file: ensure => present, content => 'hello'}
  => Puppet::Type::File {
                        path => "/etc/httpd/httpd.conf",
                    provider => posix,
                      ensure => present,
                     content => "{md5}5d41402abc4b2a76b9719d911017c592",
                    checksum => nil,
                      backup => "puppet",
                     replace => true,
                       links => manage,
                       purge => false,
                sourceselect => first,
                   show_diff => true,
        validate_replacement => "%",
          source_permissions => use,
     selinux_ignore_defaults => false,
                    loglevel => notice,
                        name => "/etc/httpd/httpd.conf",
                       title => "/etc/httpd/httpd.conf"
 }
 >>

Listing variables

To see the current variables in the scope use the vars keyword.

>> $var1 = 'value'
=> value
>> $var2 = {'key1' => 'value1'}
=> {"key1"=>"value1"}
>> vars
"Facts were removed for easier viewing"
{
"datacenter"  => "datacenter1",
"facts"       => "removed by the puppet-repl",
"module_name" => "",
"name"        => "main",
"title"       => "main",
"trusted"     => {
      "authenticated" => "local",
      "certname"      => nil,
      "domain"        => nil,
      "extensions"    => {},
      "hostname"      => nil
      },
"var1"        => "value",
"var2"        => {
  "key1" => "value1"
  }
}

Using functions

Functions will run and produce the desired output. If you type the word functions a list of available functions will be displayed on the screen.

>> split('hello/there/one/two/three','/')
 => ["hello", "there", "one", "two", "three"]

So you can imagine how much fun this can be trying out different types of functions.

Duplicate resource error

Just like normal puppet code you cannot create duplicate resources.

>> file{'/tmp/failure2.txt': ensure => present}
 => Evaluation Error: Error while evaluating a Resource Statement, Duplicate declaration: File[/tmp/failure2.txt] is already declared in file :1; cannot redeclare at line 1 at line 1:1

You can reset the parser by running reset within the repl without having to exit.

Setting the puppet log level

If you want to see what puppet is doing behind the scenes you can set the log level via :set loglevel debug. Valid log levels are debug, info, warning and other levels defined in puppet config reference .

>> hiera('value')
 => foo
>> :set loglevel debug
loglevel debug is set
>> hiera('value')
Debug: hiera(): Looking up value in YAML backend
Debug: hiera(): Looking for data source nodes/foo.example.com
Debug: hiera(): Found value in nodes/foo.example.com
 => foo

Troubleshooting

Forward

I was just playing around and created this simple tool. Its beta quality, and a ton of features need to be added. Please create a issue if you see a bug or feature that should be added.

Pull requests welcomed.