Hash Interpolation inside double quotes?

[Douglas Garstang]

I've got this:

    file {

        '/opt/sugarsync/tomcat/tomcat-home/current':

            ensure => "tomcat-$config['tomcat_version_server']";

where $config['tomcat_version_server'] was set with extlookup (the yaml one), by loading:

---

tomcat_config:

  tomcat_version_server: 6.0.20-1

  tomcat_version_libs: 1.0-1

Inside those double quotes, where variable interpolation is supposed to occur, I'm actually getting:

tomcat-tomcat_version_libs1.0-1tomcat_version_server6.0.20-1['tomcat_version_server']

Not '6.0.20-1'. How can I interpolate a hash inside a string? Is this a bug?

Doug.

[Brian Gallew]

String interpolation in the Puppet DSL is strictly variable->string, and does not handle arrays. For what you want, use
inline_template("tomcat-<%= $config['tomcat_version_server'] %>")

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[Douglas Garstang]

Hmmm.... I tried that, with:

    file {

        '/opt/sugarsync/tomcat/tomcat-home/current':

            ensure => inline_template("tomcat-<%= $config['tomcat_version_server'] %>");

    }

and that results in:

Aug  8 11:51:03 hpma01p1 puppet-master[18712]: compile error (erb):1: no .<digit> floating literal anymore; put 0 before dot _erbout = ''; _erbout.concat "tomcat-"; _erbout.concat(( tomcat_version_libs1.0-1tomcat_version_server6.0.20-1['tomcat_version_server'] ).to_s); _erbout                                                                               ^ (erb):1: syntax error _erbout = ''; _erbout.concat "tomcat-"; _erbout.concat(( tomcat_version_libs1.0-1tomcat_version_server6.0.20-1['tomcat_version_server'] ).to_s); _erbout                                                                                ^ (erb):1: syntax error _erbout = ''; _erbout.concat "tomcat-"; _erbout.concat(( tomcat_version_libs1.0-1tomcat_version_server6.0.20-1['tomcat_version_server'] ).to_s); _erbout                                                                                                        ^ (erb):1: no .<digit> floating literal anymore; put 0 before dot _erbout = ''; _erbout.concat "tomcat-"; _erbout.concat(( tomcat_versi

--
Regards,

Douglas Garstang
http://www.linkedin.com/in/garstang
Email: doug.g...@gmail.com
Cell: +1-805-340-5627

[vagn scott]

On 08/08/2011 02:52 PM, Douglas Garstang wrote:
>
> file {
> '/opt/sugarsync/tomcat/tomcat-home/current':
> ensure => inline_template("tomcat-<%=
> $config['tomcat_version_server'] %>");
> }
>

Try without the dollar sign:

file {
'/opt/sugarsync/tomcat/tomcat-home/current':
ensure => inline_template("tomcat-<%=

config['tomcat_version_server'] %>");
}

[Douglas Garstang]

Thanks. That did it. Ugly...

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[Scott Smith]

Works the same as it does in Bourne shell. If you want to use double quotes inside a double-quoted string, you have to escape them. Or use single quotes.

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[Douglas Garstang]

I wasn't trying to use double quotes inside a double quoted string.

[Scott Smith]

D'oh, looks like I need to refresh my vision prescription :(

[Douglas Garstang]

But, I would like to replace:

    file {

        "${tomcat_home_dir}/current":

            ensure => inline_template("tomcat-<%= config['tomcat_version_server'] %>");

    }

with:

    file {

        "$config['tomcat_home_dir']/current":

            ensure => inline_template("tomcat-<%= config['tomcat_version_server'] %>");

    }

... and I don't think that will work. Obviously, I can't use an inline template here...

Doug.

[vagn scott]

On 08/08/2011 04:26 PM, Douglas Garstang wrote:
> But, I would like to replace:
>
> file {
> "${tomcat_home_dir}/current":
> ensure => inline_template("tomcat-<%=
> config['tomcat_version_server'] %>");
> }
>
> with:
>
> file {
> "$config['tomcat_home_dir']/current":
> ensure => inline_template("tomcat-<%=
> config['tomcat_version_server'] %>");
> }
>

$f = inline_template("<%= config['tomcat_home_dir'] -%>/current")
$v = inline_template("tomcat-<%= config['tomcat_version_server'] %>")

file {
"${f}":
ensure => "${v}",
}

Or similar.

--
vagn

[Thomas Bellman]

Douglas Garstang wrote:

> How can I interpolate a hash inside a string?

Like this:

"tomcat-${config['tomcat_version_server']}"

The curly braces groups things so the parser knows that the
variable expression to expand doesn't end after the "g" in
"config".

I'm not sure where this is documented, though. I can't find
it after a quick look in the language guide, where I had
expected it to be.

/Bellman

[Stefan Schulte]

IIRC it should read "tomcat-${config['tomcat_version_server']}" (notice
the curling braces). Otherwise puppet will print the hash first (and
concats all keys and values) and then just put ['tomcat_version_server']
after it.

Does the above suggestion work?

-Stefan

[Douglas Garstang]

Seems to work...

Thanks.

I got this:

    file {

        "${config['tomcat_home_dir']}/current":

            ensure => "tomcat-${config['tomcat_version_server']}",

            require => Package['ss-tomcat-server'];

    }

Slightly cleaner than the inline template approach (which didn't work for the name anyway).

Doug.