#  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 prep
#@ ```
#@ printf "[general]\n" > /tmp/instance.cfg
#@ printf "guid = 9CB197F0-4569-446A-A987-1DDEC1205F6B\n" >> /tmp/instance.cfg
#@ printf "port=5308" >> /tmp/instance.cfg
#@ ```
#+end_src
##############################################################################
#+begin_src cfengine3
bundle agent main
{
  vars:
      # the returned data container is a key-value map:

      # the whole matched string is put in key "0"
      # the first three characters are put in key "name1"
      # the next three characters go into key "2" (the capture has no name)
      # the next two characters go into key "3" (the capture has no name)
      # then the dash is ignored
      # then three characters are put in key "name2"
      # then another dash is ignored
      # the next three characters go into key "5" (the capture has no name)
      # anything else is ignored

      "parsed" data => data_regextract("^(?<name1>...)(...)(..)-(?<name2>...)-(..).*", "abcdef12-345-67andsoon");
      "parsed_str" string => format("%S", parsed);

      # Illustrating multiline regular expression

      "instance_guid_until_end_of_string"
        data => data_regextract( "^guid\s?+=\s?+(?<value>.*)$",
                                 readfile( "/tmp/instance.cfg", 200));

      "instance_guid"
         data => data_regextract( "^guid\s+=\s+(?<value>[^\n]*)",
                                  readfile( "/tmp/instance.cfg", 200));

      "instance_port"
         data => data_regextract( "^port\s?+=\s?+(?<value>[^\n]*)",
                                  readfile( "/tmp/instance.cfg", 200));

  reports:
      "$(this.bundle): parsed[0] '$(parsed[0])' parses into: $(parsed_str)";
      "$(this.bundle): instance_guid_until_end_of_string[value] '$(instance_guid_until_end_of_string[value])'";
      "$(this.bundle): instance_guid[value] '$(instance_guid[value])'";
      "$(this.bundle): instance_port[value] '$(instance_port[value])'";
}
#+end_src
###############################################################################
#+begin_src example_output
#@ ```
#@ R: main: parsed[0] 'abcdef12-345-67andsoon' parses into: {"0":"abcdef12-345-67andsoon","2":"def","3":"12","5":"67","name1":"abc","name2":"345"}
#@ R: main: instance_guid_until_end_of_string[value] '9CB197F0-4569-446A-A987-1DDEC1205F6B
#@ port=5308'
#@ R: main: instance_guid[value] '9CB197F0-4569-446A-A987-1DDEC1205F6B'
#@ R: main: instance_port[value] '5308'
#@ ```
#+end_src
