[chef] Re: Re: Create ruby variable at chef runtime at specific position in a recipe

Ok I tried it and it works if you write all coming resources in the lwrp.

But I can not use this unfortunately because there still get a lot more 
resouces that not logically fit together, but still need the same variable 
('my_hash_obj_with_the_key_value_pairs').
Aktuell habe ich es wie folgt geschrieben: 

/recipe/default.rb

# Produce the file "key_value_file" in "/path/to/the/file/i/want/to/parse"
package "some_special_package"

mycb_file_parser "extract the key value pairs" do
  file "/path/to/the/file/i/want/to/parse/key_value_file"
  provider "mycb_extractor"
  action :extract
end

/resources/file_parser.rb

actions :extract, :nothing

default_action :nothing

def initialize(*args)
  super
  @action = :nothing
end

attribute :file, :kind_of => String, :name_attribute => true, :required => 
true

/providers/extractor.rb

action :extract do
  my_hash_obj_with_the_key_value_pairs = 
(MyObj.new(["#{new_resource.file}"])).parse_file

  file "touch some other file" do
   path "#{my_hash_obj_with_the_key_value_pairs[:mypath]}/file_to_touch"
   action :touch
 end
end

But what I want is the variable 'my_hash_obj_with_the_key_value_pairs' 
outside of the provider. If must store them in a data bag or in the node 
object makes no matter the main thing is I can access to run-time the correct 
variable. Is it possible to get it like this?:

package "some_special_package"

# filled the variable with the hash
mycb_file_parser "extract the key value pairs" do
  file "/path/to/the/file/i/want/to/parse/key_value_file"
  provider "mycb_extractor"
  action :extract
end

file "touch some other file1" do
  path "#{<a variable no matter what she looks 
like>[:mypath1]}/file_to_touch1"
  action :touch
end

file "touch some other file2" do
  path "#{<a variable no matter what she looks 
like>[:mypath2]}/file_to_touch2"
  action :touch
end

...

file "touch some other fileX" do
  path "#{<a variable no matter what she looks 
like>[:mypathX]}/file_to_touchX"
  action :touch
end


Oleg


-------- Original-Nachricht --------
> Datum: Sat, 3 Nov 2012 20:27:57 -0700
> Von: Jesse Nelson 
> <
 >
> An: 
> 
 
> Betreff: [chef] Re: Create ruby variable at chef runtime at specific 
> position in a recipe

> Create a provider for your file parsing that gets notified by the
> package/file that is creating the data. Keep your parsing Class in
> libraries. The provider can parse your new files data, setup your
> other resources, and run them. This can also setup either a new
> namespace or tuck the parsed data into the node object or in run_state
> for future access. Depending on the needs you can use LWRP or native
> resource/provider. I think you should be able to get away with an
> LWRP+Libraries for this tho.
> 
> On Sat, Nov 3, 2012 at 7:21 AM,  
> <
 >
>  wrote:
> > I have a recipe in which one resource creates a file. After that I want
> to use my self written object from libraries to parse this file and extract
> some values. This values then I want to use in the coming resources. But
> when I use a ruby_block at the specific position in the recipe to create my
> object that holds simply the values as a hash, the hash is empty in the
> next resource. Here is a short example to explain.
> >
> > package "some_special_package" # Produce the file "key_value_fil" in
> "/path/to/the/file/i/want/to/parse"
> >
> > ruby_block "Create my object" do
> >   block do
> >     my_hash_obj_with_the_key_value_pairs =
> (MyObj.new("/path/to/the/file/i/want/to/parse/key_value_file")).parse_file 
> # returns a hash like:
> {:mypath => "/etc/some_other_dir"}
> >   end
> > end
> >
> > file "touch some other file" do
> >   path "#{my_hash_obj_with_the_key_value_pairs[:mypath]}/file_to_touch"
> >   action :touch
> > end
> >
> > I know what is the reason for that. Chef runs in two phases and in the
> first phase the object "MyObj" is created, but at this point the file does
> not exist. So the generated hash is empty. In the second phase the access to
> "my_hash_obj_with_the_key_value_pairs[:mypath]" returns nil and so on. In
> my last try I used the "node.run_state" variable, but there is the same
> problem.
> >
> > So someone how can help me?
> >
> > Oleg