Hi Thomas, many thanks for pointing me to the documentation with the updates. Your proposed code is exactly what I am looking for.
I really like Puppet 4 Functions!! Best, Martin On 01 Sep 2015, at 14:33, Thomas Hallgren <thomas.hallg...@puppetlabs.com> wrote: > A correction to my last reply. You must use Pattern, not Regexp (a Regexp is > for regexp instances whereas a Pattern matches strings). > > - thomas > > > On 2015-09-01 14:28, Thomas Hallgren wrote: >> On 2015-09-01 13:27, Martin Alfke wrote: >>> Hi Thomas, >>> On 01 Sep 2015, at 09:59, Thomas Hallgren >>> <thomas.hallg...@puppetlabs.com> >>> wrote: >>> >>> >>>> Hi Martin, >>>> >>>> The function API has evolved slightly since the blog entry that you're >>>> referring to was written. The arg_count was removed since it was redundant >>>> and confusing after we introduced the 'optional_param' and >>>> 'repeated_param'. You can find the documentation for Puppet 4.2 functions >>>> here: >>>> >>>> >>>> https://docs.puppetlabs.com/references/4.2.latest/developer/Puppet/Functions.html >>> Many thanks for pointing to the new updated documentation. >>> >>> My idea is to create a functions which has 3 use cases: >>> - no parameter: return hostname of puppet master >>> - ip as parameter: return DNS resolved name >>> - hostname/fqdn as parameter: return IP address from DNS >>> >>> How to check for explizit “no parameter”? >>> >> Create two dispatch entries. One that require a parameter and one where no >> parameter is declared. The one without a parameter will be used when no >> argument is given. In this scenario, the check for ip or hostname must be >> done in the method targeted by the dispatch with one parameter. >> >> Alternatively, you could use three dispatch entries. One without a parameter >> (as before) and then two with parameters using mutually exclusive regular >> expression types. One matching the IP and another matching hostname/fdqn. >> Something like this: >> >> dispatch :no_param do >> end >> >> dispatch :ip_param do >> param 'Regexp[/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/]', :ip >> end >> >> dispatch :fqdn_param do >> param 'Regexp[/^([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,}$/]', fdqn >> end >> >> def no_param >> return puppet master hostname >> def >> >> def ip_param(ip) >> ... >> end >> >> def fqdn_param(ip) >> ... >> end >> >> - thomas >> >> >> - thomas >> > > > -- > You received this message because you are subscribed to the Google Groups > "Puppet Developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to puppet-dev+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/puppet-dev/55E59B25.7030604%40puppetlabs.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Puppet Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to puppet-dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/puppet-dev/81C3FA66-415A-4BC3-A6C0-DEFC2C5D3692%40gmail.com. For more options, visit https://groups.google.com/d/optout.
