[MacPorts] #37250: munin: automatic configuration fails due to missing directory

[MacPorts]

#37250: munin: automatic configuration fails due to missing directory
----------------------+---------------------
 Reporter:  raimue@…  |      Owner:  alpha@…
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.1.2
 Keywords:            |       Port:  munin
----------------------+---------------------
 '''1.'''
 The initial configuration of munin fails due to the missing directory
 `plugin-conf.d` with the following error message:

 {{{
 Could not open plugin configuration directory: No such file or directory
 at /opt/local/lib/perl5/site_perl/5.12.4/Munin/Node/Service.pm line 81
 }}}

 The attached patch adds this directory to `destroot.keepdirs`, so it is no
 longer automatically deleted.

 '''2.'''
 The automatic detection also needs to be run as the user `munin` as
 otherwise all plugins will fail in the autoconf step. Munin tries to be
 clever and drop the superuser privileges, but that does not work with
 `setrgid` here:
 {{{
 Plugin 'munin_stats' Can't drop privileges: setrgid() not implemented at
 /opt/local/lib/perl5/site_perl/5.12.4/Munin/Node/OS.pm line 261.
 }}}
 Therefore, use `sudo -u munin` for the automatic configuration.

 '''3.''' Additionally, the default configuration files should be installed
 with a `.sample` extension and copied if they do not exist yet.

-- 
Ticket URL: <https://trac.macports.org/ticket/37250>
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