elegant way to hash a line in a file, if present

[Cam Mac]

Hi,

I wanted to create a recipe for hashing a line in a file (I'd rather hash it than delete it), if the file is present and that particular line is present. I came up with a less than elegant solution and wondered whether

someone knows of a better way.

The file in question: /usr/share/X11/xorg.conf.d/glamor.conf

The line in question (which needs to be commented):  Load  "glamoregl"

  exec { 'hash_glamor':

    path    => '/bin:/usr/sbin:/usr/bin',

    command => 'sed -i \'s/\(^\s*Load\s*\"glamoregl\"$\)/\#\1/\' /usr/share/X11/xorg.conf.d/glamor.conf',

    onlyif => 'grep -E "^\s*Load\s*\"glamoregl\"$" /usr/share/X11/xorg.conf.d/glamor.conf',

  }

I tried using the 'file_line' module:

  file_line { 'hash_glamor':

    path  => '/usr/share/X11/xorg.conf.d/glamor.conf',

    line  => '#      Load  "glamoregl"',

    match => 'Load  "glamoregl"',

  }

but this returns an error if the file doesn't exist, and I couldn't find a way of adding a conditional that will check whether the file exists in the 'file_line' module before it executes.

Augeas could be a possibility, but I couldn't see a way of doing it in a simple way.

Any suggestions welcome.

Thanks,

Cam

[Tom Limoncelli]

You'll want to create the file using file{} and then add require =>
File['/path/to/file'] so that the file is created before Puppet tries
to modify it.

You can do that with less typing by using the -> operator. For example:

file { '/usr/share/X11/xorg.conf.d/glamor.conf':
ensure => file,
mode => '0644', # adjust as needed
owner => 'root', # adjust as needed
group => 'root', # adjust as needed
}->

file_line { 'hash_glamor':
path => '/usr/share/X11/xorg.conf.d/glamor.conf',
line => '# Load "glamoregl"',
match => 'Load "glamoregl"',
}

Tom

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[Cam Mac]

Hi Tom,

Thanks for the reply. I hadn't used the 'file' method as I didn't want to create the file if it wasn't there already, only modify it. Sorry I should have said that in my original post. It was this requirement that made it less than straightforward.

Cheers,

Cam