#  Copyright 2021 Northern.tech AS

#  This file is part of CFEngine 3 - written and maintained by Northern.tech AS.

#  This program is free software; you can redistribute it and/or modify it
#  under the terms of the GNU General Public License as published by the
#  Free Software Foundation; version 3.

#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA

# To the extent this program is licensed as part of the Enterprise
# versions of Cfengine, the applicable Commercial Open Source License
# (COSL) may apply to this file if you as a licensee so wish it. See
# included file COSL.txt.

#+begin_src cfengine3
bundle agent main
{
  vars:

      "range" string => "1-32";
      "hostname_f" string => execresult( "hostname -f", useshell);
      "hostname_s" string => execresult( "hostname -s", useshell);
      "hostname" string => execresult( "hostname", useshell);

  classes:

      "hostgroup_alpha_no_leading_zeros" expression => hostrange("host", $(range) );
      "hostgroup_alpha_leading_zeros"    expression => hostrange("host", "00$(range)" );
      "hostgroup_alpha_UPPERCASE_prefix" expression => hostrange("HOST", "0$(range)" );

  reports:
      "sys.fqhost = '$(sys.fqhost)'";
      "sys.uqhost = '$(sys.uqhost)'";
      "hostname -f = '$(hostname_f)'";
      "hostname -s = '$(hostname_s)'";
      "hostname = '$(hostname)'";

    hostgroup_alpha_no_leading_zeros::

      "This host is within the alpha host group range (host$(range))";

    hostgroup_alpha_leading_zeros::
      "This host is within the alpha host group range (host00$(range)) (NOTE: Leading zeros and prefix capitalization is insignificant)";

    hostgroup_alpha_UPPERCASE_prefix::
      "This host is within the alpha host group range (HOST0$(range)) (NOTE: Leading zeros and prefix capitalization is insignificant)";
}
#+end_src
###############################################################################
#+begin_src static_example_output
#@ ```
#@ R: sys.fqhost = 'host001.example.com'
#@ R: sys.uqhost = 'host001'
#@ R: hostname -f = 'HOST001.example.com'
#@ R: hostname -s = 'HOST001'
#@ R: hostname = 'HOST001'
#@ R: This host is within the alpha host group range (host1-32)
#@ R: This host is within the alpha host group range (host001-32) (NOTE: Leading zeros and prefix capitalization is insignificant)
#@ R: This host is within the alpha host group range (HOST01-32) (NOTE: Leading zeros and prefix capitalization is insignificant)
#@ ```
#+end_src