Puppet users - Dec 2010 - variables created with generate() function have a newline when used in a template

I have this in nodes.pp

$puppetmaster_fqdn = generate("/usr/bin/facter","fqdn")

and this in a template

http://<%= puppetmaster_fqdn %>:8080

When puppet runs, this is the result:

http://puppet.home
:8080

Anybody any clue to whats causing this? I''ve tried -%>

-- 
You received this message because you are subscribed to the Google Groups
"Puppet Users" group.
To post to this group, send email to puppet-users@googlegroups.com.
To unsubscribe from this group, send email to
puppet-users+unsubscribe@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/puppet-users?hl=en.

----- Original Message -----
> I have this in nodes.pp
> 
> $puppetmaster_fqdn = generate("/usr/bin/facter","fqdn")
the output from this command has a new line in it
> http://<%= puppetmaster_fqdn %>:8080
<%= puppetmaster_fqdn.chomp %>

-- 
R.I.Pienaar

-- 
You received this message because you are subscribed to the Google Groups
"Puppet Users" group.
To post to this group, send email to puppet-users@googlegroups.com.
To unsubscribe from this group, send email to
puppet-users+unsubscribe@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/puppet-users?hl=en.

On Sun, Dec 26, 2010 at 22:45, bowlby <bramenning@gmail.com>
wrote:
> I have this in nodes.pp
> $puppetmaster_fqdn = generate("/usr/bin/facter","fqdn")
>
> and this in a template
> http://<%= puppetmaster_fqdn %>:8080
>
> When puppet runs, this is the result:
> http://puppet.home
> :8080
>
> Anybody any clue to whats causing this? I''ve tried -%>
I suspect that -%> only eats whitespace outside the bracket, not
inside.  Anyhow, you can make this do the right thing using a tiny bit
of ruby:  <%= puppetmaster_fqdn.chomp %>

Regards,
    Daniel
-- 
✣ Daniel Pittman            ✉ daniel@rimspace.net            ☎ +61 401 155 707
              ♽ made with 100 percent post-consumer electrons

-- 
You received this message because you are subscribed to the Google Groups
"Puppet Users" group.
To post to this group, send email to puppet-users@googlegroups.com.
To unsubscribe from this group, send email to
puppet-users+unsubscribe@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/puppet-users?hl=en.

Thanks, both of you! That solved it.

Merry Christmas (for what''s left of it...)



On Dec 26, 12:54 pm, Daniel Pittman <dan...@rimspace.net>
wrote:
> On Sun, Dec 26, 2010 at 22:45, bowlby <bramenn...@gmail.com> wrote:
> > I have this in nodes.pp
> > $puppetmaster_fqdn =
generate("/usr/bin/facter","fqdn")
>
> > and this in a template
> > http://<%= puppetmaster_fqdn %>:8080
>
> > When puppet runs, this is the result:
> >http://puppet.home
> > :8080
>
> > Anybody any clue to whats causing this? I''ve tried -%>
>
> I suspect that -%> only eats whitespace outside the bracket, not
> inside.  Anyhow, you can make this do the right thing using a tiny bit
> of ruby:  <%= puppetmaster_fqdn.chomp %>
>
> Regards,
>     Daniel
> --
> ✣ Daniel Pittman            ✉ dan...@rimspace.net            ☎ +61 401 155
707
>               ♽ made with 100 percent post-consumer electrons
-- 
You received this message because you are subscribed to the Google Groups
"Puppet Users" group.
To post to this group, send email to puppet-users@googlegroups.com.
To unsubscribe from this group, send email to
puppet-users+unsubscribe@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/puppet-users?hl=en.

This works when using the variable inside a template.

But I want to use the variable in an Exec command. How to remove the 
newline here? .chomp does not seem to work here.

THanks

On Sunday, December 26, 2010 1:43:26 PM UTC+1, bowlby
wrote:
>
> Thanks, both of you! That solved it. 
>
> Merry Christmas (for what''s left of it...) 
>
>
>
> On Dec 26, 12:54 pm, Daniel Pittman <dan...@rimspace.net> wrote: 
> > On Sun, Dec 26, 2010 at 22:45, bowlby <bramenn...@gmail.com>
wrote:
> > > I have this in nodes.pp 
> > > $puppetmaster_fqdn =
generate("/usr/bin/facter","fqdn")
> > 
> > > and this in a template 
> > > http://<%= puppetmaster_fqdn %>:8080 
> > 
> > > When puppet runs, this is the result: 
> > >http://puppet.home 
> > > :8080 
> > 
> > > Anybody any clue to whats causing this? I''ve tried
-%>
> > 
> > I suspect that -%> only eats whitespace outside the bracket, not 
> > inside.  Anyhow, you can make this do the right thing using a tiny bit
> > of ruby:  <%= puppetmaster_fqdn.chomp %> 
> > 
> > Regards, 
> >     Daniel 
> > -- 
> > ✣ Daniel Pittman            ✉ dan...@rimspace.net            ☎ +61 401
> 155 707 
> >               ♽ made with 100 percent post-consumer electrons
-- 
You received this message because you are subscribed to the Google Groups
"Puppet Users" group.
To view this discussion on the web visit
https://groups.google.com/d/msg/puppet-users/-/AECI05CiIRYJ.
To post to this group, send email to puppet-users@googlegroups.com.
To unsubscribe from this group, send email to
puppet-users+unsubscribe@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/puppet-users?hl=en.

On Thursday, December 13, 2012 9:48:44 AM UTC-6, Sven vd
wrote:
>
> This works when using the variable inside a template.
>
> But I want to use the variable in an Exec command. How to remove the 
> newline here? .chomp does not seem to work here.
>

No, it wouldn''t.  The ''chomp'' is a method of
Ruby''s String class.  It works
in the embedded Ruby context in a template, but it is not part of the 
Puppet DSL, so it does not work for ordinary variable interpolation.

The underlying problem is that the generate() command you are using is 
outputting a trailing newline that gets incorporated into the resulting 
value.  That''s not too surprising, as it is good form for programs
(such as
whatever external command you are running) to terminate their output with a 
newline.

You have two main options:

   1. Modify the command in some way or filter its output to remove the 
   newline before it reaches Puppet
   2. Remove the newline inside Puppet

I leave you to figure out (1) on your own.  You have multiple approaches 
available for (2).  The easiest built into Puppet is to use a template, 
probably via the inline_template() function:

  $result_line = generate(''my command'')
  $result = inline_template(''<%= @result_line.chomp %>'')

That''s a little ugly, though.  If you have or are willing to install 
Puppetlabs'' "stdlib" add-on module, then it provides a
chomp() function in
Puppet.  With that, you could replace the second line above with:

  $result = chomp($result_line)

Note well that Puppet variables can only be assigned values once each.  
That''s why my examples use two variables ($result_line and $result).


John

-- 
You received this message because you are subscribed to the Google Groups
"Puppet Users" group.
To view this discussion on the web visit
https://groups.google.com/d/msg/puppet-users/-/UGPbUpMwetIJ.
To post to this group, send email to puppet-users@googlegroups.com.
To unsubscribe from this group, send email to
puppet-users+unsubscribe@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/puppet-users?hl=en.

Thanks for your complete answer! I used the inline_template method which is 
good enough for me

On Friday, December 14, 2012 3:17:24 PM UTC+1, jcbollinger
wrote:
>
>
>
> On Thursday, December 13, 2012 9:48:44 AM UTC-6, Sven vd wrote:
>>
>> This works when using the variable inside a template.
>>
>> But I want to use the variable in an Exec command. How to remove the 
>> newline here? .chomp does not seem to work here.
>>
>
>
> No, it wouldn''t.  The ''chomp'' is a method of
Ruby''s String class.  It
> works in the embedded Ruby context in a template, but it is not part of the
> Puppet DSL, so it does not work for ordinary variable interpolation.
>
> The underlying problem is that the generate() command you are using is 
> outputting a trailing newline that gets incorporated into the resulting 
> value.  That''s not too surprising, as it is good form for programs
(such as
> whatever external command you are running) to terminate their output with a
> newline.
>
> You have two main options:
>
>    1. Modify the command in some way or filter its output to remove the 
>    newline before it reaches Puppet
>    2. Remove the newline inside Puppet
>
> I leave you to figure out (1) on your own.  You have multiple approaches 
> available for (2).  The easiest built into Puppet is to use a template, 
> probably via the inline_template() function:
>
>   $result_line = generate(''my command'')
>   $result = inline_template(''<%= @result_line.chomp
%>'')
>
> That''s a little ugly, though.  If you have or are willing to
install
> Puppetlabs'' "stdlib" add-on module, then it provides a
chomp() function in
> Puppet.  With that, you could replace the second line above with:
>
>   $result = chomp($result_line)
>
> Note well that Puppet variables can only be assigned values once each.  
> That''s why my examples use two variables ($result_line and
$result).
>
>
> John
>
>
-- 
You received this message because you are subscribed to the Google Groups
"Puppet Users" group.
To view this discussion on the web visit
https://groups.google.com/d/msg/puppet-users/-/bsVEopGUj2QJ.
To post to this group, send email to puppet-users@googlegroups.com.
To unsubscribe from this group, send email to
puppet-users+unsubscribe@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/puppet-users?hl=en.