[chef] Re: Chef Recipe inserting a line before last line in fie

[Jesse Campbell < >]

I did this by making a template with some relatively simple regex.
I have since just templated the whole file, but this should still work.

Recipe:

lines[0]['text'] = "full line to insert"
lines[0]['insertpoint'] = "file line to find in the file"

template "/etc/file_to_edit" do
  source "insertline.erb"
  mode 0600
  owner "root"
  group "root"
  variables(
    :oldfile => "/etc/file_to_edit",
    :insertlines => lines
  )
end

Contents of insertline.erb:

<% output = File.read(@oldfile) -%>
<% @insertlines.each do |line| -%>
<% unless (output.match(/^#{line['text']}$/i)) -%>
<% output = output.sub(/^(#{line['insertpoint']})$/,"\\1\n#{line['text']}") 
-%>
<% end -%>
<% end -%>
<%= output -%>

On Sun, Dec 9, 2012 at 1:37 AM,  
<
 >
 wrote:
> Hello,
>
> I am new to Chef and Ruby and trying to figure out the proper way to add a 
> line
> to /etc/security/access.conf prior to the last line that denies everything 
> not
> already defined.
>
> Not sure yet whether the best way is to use a Chef command of a Ruby Block.
>
> I do not see a way in Chef to insert a new line searched for if the line 
> does
> not already exist in the file prior to another line in the file.
>
> I thought this would work:
>
> file.replace_line_if_no_match but that adds it after the last line in the 
> file.
>  In security, all the entries in access.conf that allow access have to be 
> prior
> to the line that denies everything not already allowed.
>
> Basically, I want to see if "+:mongod:cron crond\n" already exists.  If it
> does, do not do anything.  However, if it does not exist, insert it prior 
> to "-
> : ALL : ALL\n".
>
> What is the best way in a Chef Recipe to do this?
>
> Thank you.
>
> ----
> Charles Keagle
> 
 
> 425-417-3434