On 03/08/2011 10:09 PM, Disconnect wrote:
> class app {
> exec { "prescript":
> refreshonly => true, command => ..,
> }
> package { package1: ensure => installed, require => Exec["prescript"],
> notify => Exec["postscript"] }
> package { package2: ensure => installed, require =>
> Package["package1"], notify => Exec["postscript"] }
> # or require the exec if ordering doesn't matter
> ..
> exec { "postscript":
> command => "post install",
> refreshonly => true,
> }
> }
>
> Not 100% sure that the require will run the prescript, but I think that
> is correct. And the postscript will get run once at the end (even though
> it is notified 4 times)
Probably not, as the prescript isn't notified.
The prescript should not be refreshonly and specify a sensible "onlyif"
or "unless" check, so the original design is alright. (I'd use rpm -q if
possible.)
You can save reduncancy by merely adding
Package {
require => Exec["bash prescript"],
notify => Exec["bash postscript"]
}
to the original code.
HTH,
Felix
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