Puppet users - Jan 2007 - Conditional exec

I am trying to write a definition that downloads and extracts a tar
file if the destination directory does not exist.  The tar file won''t
change and does not need to be download and extracted if it changes.
The definition I am using now is:

define remote_tar($source, $directory) {
    remotefile { "/tmp/$name.tgz":
        source => $source,
    }
    exec { "tar-$name":
        command => "tar -xzf /tmp/$name.tgz",
        directory => $directory,
        creates => "$directory/$name",
        require => File["/tmp/$name.tgz"],
    }
}

The problem is that this keeps downloading the /tmp/foo.tgz file.
Also, remotefile sucks at downloading large files.  One possibility is
use a pipe on the command.

    command => "curl $source | tar -xz",

Another is to download the file to /tmp with multiple commands;.

    command => "curl -o /tmp/$name.tgz; tar -xzf $name.tgz"

It might be nice to have two separate exec resources where the
downloader one is only done when the tar one needs to run.  Is there a
way to do this?

 - Ian

On Jan 25, 2007, at 1:30 PM, Ian Burrell wrote:
> I am trying to write a definition that downloads and extracts a tar
> file if the destination directory does not exist.  The tar file
won''t
> change and does not need to be download and extracted if it changes.
> The definition I am using now is:
>
> define remote_tar($source, $directory) {
>     remotefile { "/tmp/$name.tgz":
>         source => $source,
>     }
>     exec { "tar-$name":
>         command => "tar -xzf /tmp/$name.tgz",
>         directory => $directory,
>         creates => "$directory/$name",
>         require => File["/tmp/$name.tgz"],
>     }
> }
>
> The problem is that this keeps downloading the /tmp/foo.tgz file.
It definitely should not be.  Any idea why it is?  I assume the file  
isn''t changing?
> Also, remotefile sucks at downloading large files.  One possibility is
> use a pipe on the command.
>     command => "curl $source | tar -xz",
This would be best, it looks like.
> Another is to download the file to /tmp with multiple commands;.
>
>     command => "curl -o /tmp/$name.tgz; tar -xzf $name.tgz"
>
> It might be nice to have two separate exec resources where the
> downloader one is only done when the tar one needs to run.  Is there a
> way to do this?
There is currently no way to do this, but it''s been getting requested  
a bit recently, so it might appear at some point in the future.

  --
  The reasonable man adapts himself to the world; the unreasonable one
  persists in trying to adapt the world to himself. Therefore all
  progress depends on the unreasonable man.  -- George Bernard Shaw
  ---------------------------------------------------------------------
  Luke Kanies | http://reductivelabs.com | http://madstop.com

On Thu, Jan 25, 2007 at 11:30:38AM -0800, Ian Burrell
wrote:
> I am trying to write a definition that downloads and extracts a tar
> file if the destination directory does not exist.  The tar file
won''t
> change and does not need to be download and extracted if it changes.
[...]
> It might be nice to have two separate exec resources where the
> downloader one is only done when the tar one needs to run.  Is there a
> way to do this?
Yes, of course.  It was how I used to do my downloads until I said "aaah,
stuff it" and went to Debian packages (which simplified my distribution and
caching network significantly).

I even went to the point of writing a define for it, and I''ve just
added it
to PRMweb[1] as the install_tarball_via_http recipe.

- Matt

[1] http://prmweb.hezmatt.org/

-- 
"I invented the term object-oriented, and I can tell you I did not have C++
in mind." 	-- Alan Kay

On 1/25/07, Luke Kanies <luke@madstop.com> wrote:
> On Jan 25, 2007, at 1:30 PM, Ian Burrell wrote:
> > The problem is that this keeps downloading the /tmp/foo.tgz file.
>
> It definitely should not be.  Any idea why it is?  I assume the file
> isn''t changing?
>
It isn''t downloading the file.  I meant that it keeps the file around
on disk.
> > Also, remotefile sucks at downloading large files.  One possibility is
> > use a pipe on the command.
> >     command => "curl $source | tar -xz",
>
> This would be best, it looks like.
>
That is what I ended up using.

 - Ian

On Jan 25, 2007, at 5:40 PM, Ian Burrell wrote:
> It isn''t downloading the file.  I meant that it keeps the file  
> around on disk.
Ah.  *whew*
>>> Also, remotefile sucks at downloading large files.  One  
>>> possibility is
>>> use a pipe on the command.
>>>     command => "curl $source | tar -xz",
>>
>> This would be best, it looks like.
>>
>
> That is what I ended up using.
Okay.

  --
  I do not feel obliged to believe that the same God who has endowed us
  with sense, reason, and intellect has intended us to forgo their use.
                  -- Galileo Galilei
  ---------------------------------------------------------------------
  Luke Kanies | http://reductivelabs.com | http://madstop.com