Ruby can't 'put', gives error 'Unknown function puts'

Question

First off, I'm a ruby noob and I'm in a bit over my head, please be gentile.

I'm getting an exception on line 14 of this file, (written by someone else).

https://github.com/theforeman/kafo/blob/master/modules/kafo_configure/manifests/yaml_to_class.pp

  if is_hash($kafo_configure::params[$name]) {
    # The quotes around $classname seem to matter to puppet's parser...
    $params = { "${classname}" => $kafo_configure::params[$name] }
    create_resources( 'class', $params )

I need to adding a debugging to determine why the 'create_resources' function call is crashing.

exception object expected at /usr/local/var/rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems\
/kafo-0.6.0/modules/kafo_configure/manifests/yaml_to_class.pp:14 on node foo.bar

When I try and print out the value of $name, I encounter an error that 'puts' is an unknown function.

  if is_hash($kafo_configure::params[$name]) {
    puts "debugging name is #{name}"
    # The quotes around $classname seem to matter to puppet's parser...
    $params = { "${classname}" => $kafo_configure::params[$name] }
    create_resources( 'class', $params )

I've also tried the following syntaxes:

    puts "debugging name is #{name}"
    print "debugging name is #{name}"
    puts "debugging name is $name"
    print "debugging name is $name"
    puts "debugging name is #{$name}"

Can anyone explain:
1. Why this function is unable to print/put ?
2. Is there another way to show what the value of that $name variable is?

Update

As pointed out, I've also used this syntax puts "debugging name is #{$name}"

I don't see it from that 4 lines. Add to them then, to avoid misunderstanding. — zishe, May 29 '14 at 01:04
This is not Ruby — it looks like Perl. Er, correction, from looking at the file, it looks like it's Puppet's manifest language. At any rate, not Ruby. — Chuck, May 29 '14 at 01:10
It's not Perl. It's the Puppet DSL. Ruby is a no go there. you can use something like `$foo = inline_template("<%= puts 'foo' %>")`. I don't remember what log file this would write to though. — ptierno, Jun 01 '14 at 05:26
@Chuck: Sorry, just realized you noticed it was Puppet. My bad :) — ptierno, Jun 01 '14 at 05:27

score 2 · Answer 1 · answered May 29 '14 at 11:22

2

You can use the notice function for printing debugging messages.

The fail function you've pointed out will print the message, but will also break the manifest execution.

answered May 29 '14 at 11:22

Emyl

10,460
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score 1 · Answer 2 · answered May 29 '14 at 01:34

Figured it out. Since puppet is written in ruby, I mistakenly assumed that I could use ruby inside of the puppet file.

I was able to print out the debuging statement I needed using puppet's built in 'fail' function

fail("if the value of name is ${name}")

Working solution

if is_hash($kafo_configure::params[$name]) {
# The quotes around $classname seem to matter to puppet's parser...
fail("if the value of name is ${name}")
$params = { "${classname}" => $kafo_configure::params[$name] }
create_resources( 'class', $params )

`Since puppet is written in ruby, I mistakenly assumed that I could use ruby inside of the puppet file.` Normally, that would not be a mistake. — 7stud, May 29 '14 at 02:20

score 1 · Answer 3 · answered May 30 '14 at 10:34

1

To make debug messages visible on the agent side, you can employ the notify { } resource type.

answered May 30 '14 at 10:34

Felix Frank

8,125
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Ruby can't 'put', gives error 'Unknown function puts'

3 Answers3