[chef] Re: Re: where is the better place for this code?

[Juan Jesús Ojeda Croissier < >]

Hi Hani,

On Wed, Nov 16, 2011 at 3:58 AM, hani elabed 
<
 >
 wrote:
> Hi Juan,
>
> I am also new at this, so bear with me... And hope others will correct me if
> I am giving the wrong advice.
> I think you should use the "Template" resource... here is an example of its
> usage to change the config file of the NTP server
>
> template "/etc/ntp.conf" do
>     source "ntp.conf.erb"
>     variables( :ntp_server => "time.nist.gov" )
> end
>
> Note the template file is the ntp.conf.erb ( erb for embedded ruby as in
> Rails *.erb ), and the file that would be produced as a result of ERB
> substitution is /etc/ntp.conf...
>

I know about the .erb templates but (AFAIK) it will create a new file
to replace the old one, but that's exactly what try to avoid.
I want to keep the old file because is a file that will contain
settings changed by the user (or app) that I want to keep. I just want
to change a single string from the current file, not create a new one.

Thans for the answer a nd your time anyway :-)

[...]
> 2011/11/15 Juan Jesús Ojeda Croissier 
> <
 >
>>
>> Hi :-)
>>
>> I'm quite new here, but I really love the project and the community.
>> You all are great :-)
>>
>> Well, I was writting a couple of new cookbooks for a project[1] where
>> I'm working on and I found that I need very often to check if some
>> string is in a file and replace just one string keepking the rest of
>> the file as it was.
>>
>> For example a file that a user (or app) can write and usually does.
>> Maybe we like to be sure that specific value for a key is always the
>> right one, but not to change the part of the file where the user (or
>> app) has already changed.
>>
>> I wrote some code for this (which is currently working), but I don't
>> know if I did in the right place and in the right way. I love to have
>> it at Chef, but I guess it need to be proven useful and the community
>> agree. By now I put it in my cookbooks at:
>> cookbooks/the_cookbook/libraries/file.rb
>>
>> Here is the actual code and example or recipe using it:
>> https://gist.github.com/1368640
>>
>> But I'll write down here a simplier version:
>>
>> def include?(str)
>>  file_content = ::File.open(@path).read
>>  return true if file_content =~ /#{str}/
>>  return false
>> end
>>
>> def replace(str, str2)
>>  old_content = ::File.open(@path).read
>>  content old_content.gsub(str, str2)
>> end
>>
>> These methods are Chef::Resource::File's methods. I wrote like that
>> because was the only way I got them working, but it seems to me that
>> it should be a Providers' instead... I don't know...
>>
>> I hope you guy could give me some light about it. And also tell me if
>> you find this interesting enough to have it at Chef itself. I'm pretty
>> sure that I gonna use them a lot for my recipes...
>>
>> Thanks a lot for your time.
>> Cheers
>>
>>
>> [1] http://www.guadalinex.org
>>     http://goo.gl/WSoU2 ;(google treanslated version of the actual project)
>> --
>> Juanje
>
>



-- 
Juanje