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Full Discussion: problems iterating in RUBY while extracting info from YAML, Pls help!
Top Forums Programming problems iterating in RUBY while extracting info from YAML, Pls help! Post 302243240 by wrapster on Saturday 4th of October 2008 10:42:49 AM
Old 10-04-2008
problems iterating in RUBY while extracting info from YAML, Pls help!
Hi all,
I am stuck with a ruby script that extracts detials from yaml file and processes accordingly.
the yaml file
Code:
confivnic:
  device:
    vnic1:
      policy:
      - L2
      mode: active
    vnic2:
      policy:
      - L3
      - L4
      mode: active
  type: aggr

notsoconfi:
  device:
    vnic9:
      policy:
      - L2
      - L3
      mode: "off"
    vnic3:
      policy:
      - L2
      - L3
      mode: active
    vnic6:
      policy:
      - L3
      - L2
      mode: active
  type: aggr

the ruby script
Code:
require 'yaml'
yaml = YAML::load(File.open("testyaml.yaml"))

yaml.each do |name, option|
if option['type'] == "aggr"
names = Array.new
names.push name
while names.size != 0
key = yaml.keys.first
tpl = "dladm create-{{{type}}} {{{sets}}} {{{cmd}}}"
tpl.gsub! '{{{type}}}', yaml[key]['type']
tpl.gsub! '{{{cmd}}}',  key
sets = ''
set_tpl = '-l {{{key}}} -L={{{mode}}} -P={{{policy}}} '
yaml[key]['device'].each do |device|
  set = set_tpl.dup
  set.gsub! '{{{key}}}',    device[0]
  set.gsub! '{{{mode}}}',   device[1]['mode']
  set.gsub! '{{{policy}}}', device[1]['policy'].join(',')
  sets << set
end
names.pop
end
tpl.gsub! '{{{sets}}}', sets
puts tpl.gsub(/\s+/,' ')
end
end

The o/p i get is like this
Code:
dladm create-aggr -l vnic9 -L=off -P=L2,L3 -l vnic3 -L=active -P=L2,L3 -l vnic6 -L=active -P=L3,L2 notsoconfi
dladm create-aggr -l vnic9 -L=off -P=L2,L3 -l vnic3 -L=active -P=L2,L3 -l vnic6 -L=active -P=L3,L2 notsoconfi

but the yaml file has 2 names ,"confivnic" and "notsoconfi"
This was written originally for just one module but for obvious reasons we had to change it. I tried all i knew but really not finding a way out.
The things that i feel are creating errors are yaml.keys.first
or the way iteration is done.

The o/p i want is similar to the shown one but instead of repeating the same one twice i want the other one to be displayed as well with the necessary changes.

Pls help
 

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LEARN ABOUT OSX

cpan::meta::yaml

CPAN::Meta::YAML(3)					User Contributed Perl Documentation				       CPAN::Meta::YAML(3)

NAME

       CPAN::Meta::YAML - Read and write a subset of YAML for CPAN Meta files

VERSION

       version 0.008

SYNOPSIS

	   use CPAN::Meta::YAML;

	   # reading a META file
	   open $fh, "<:utf8", "META.yml";
	   $yaml_text = do { local $/; <$fh> };
	   $yaml = CPAN::Meta::YAML->read_string($yaml_text)
	     or die CPAN::Meta::YAML->errstr;

	   # finding the metadata
	   $meta = $yaml->[0];

	   # writing a META file
	   $yaml_text = $yaml->write_string
	     or die CPAN::Meta::YAML->errstr;
	   open $fh, ">:utf8", "META.yml";
	   print $fh $yaml_text;

DESCRIPTION

       This module implements a subset of the YAML specification for use in reading and writing CPAN metadata files like META.yml and MYMETA.yml.
       It should not be used for any other general YAML parsing or generation task.

       NOTE: META.yml (and MYMETA.yml) files should be UTF-8 encoded.  Users are responsible for proper encoding and decoding.	In particular, the
       "read" and "write" methods do not support UTF-8 and should not be used.

SUPPORT

       This module is currently derived from YAML::Tiny by Adam Kennedy.  If there are bugs in how it parses a particular META.yml file, please
       file a bug report in the YAML::Tiny bugtracker: http://rt.cpan.org/NoAuth/ReportBug.html?Queue=YAML-Tiny
       <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=YAML-Tiny>

SEE ALSO

       YAML::Tiny, YAML, YAML::XS

SUPPORT

   Bugs / Feature Requests
       Please report any bugs or feature requests through the issue tracker at http://rt.cpan.org/Public/Dist/Display.html?Name=CPAN-Meta-YAML
       <http://rt.cpan.org/Public/Dist/Display.html?Name=CPAN-Meta-YAML>.  You will be notified automatically of any progress on your issue.

   Source Code
       This is open source software.  The code repository is available for public review and contribution under the terms of the license.

       https://github.com/dagolden/cpan-meta-yaml <https://github.com/dagolden/cpan-meta-yaml>

	 git clone https://github.com/dagolden/cpan-meta-yaml.git

AUTHORS

       o   Adam Kennedy <adamk@cpan.org>

       o   David Golden <dagolden@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2010 by Adam Kennedy.

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

perl v5.16.2							    2012-03-14						       CPAN::Meta::YAML(3)
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