From: Dan George <endege@...>
Date: 2007-09-07T07:05:07+09:00
Subject: Re: Using external text file to do search and replace?

On Sep 6, 8:06 pm, Stefano Crocco <stefano.cro...@alice.it> wrote:
> Alle gioved� 6 settembre 2007, Dan George ha scritto:
>
>
>
> > I tried what you said and it shows it works and I get an Exit code: 0
> > but nothing is modified.
>
> > Here's what I have now:
>
> > require 'yaml'
> > promo = File.open('promo.yaml')
> > yp = YAML::load_documents(promo) do |item|
> > txt_files = Dir.glob('**/*.txt').each do |path|
> > puts path
> >   file = File.open(path).readlines.each { |line|
> >     if line.match(/PROMOS/)
> >       then line.gsub!(item['search'], item['sub'])
> >     end }
> >   File.open(path, 'w'){|f| f.write file}
> > end
> > end
>
> > And my YAML file looks like this:
>
> > ---
> > search: /PROMO1=[A-Za-z0-9]+/
> > sub: PROMO1=some_text
>
> > Can anyone please tell me what's wrong with it?
>
> The reason your code doesn't work is that the search string is stored in the
> YAML file as a string, not as a regexp. To use it as a regexp, you need to
> create a regexp from it: remove the delimiting / in the regexp in the YAML
> file and replace the call to gsub! with:
>
>   gsub(Regexp.new(item['search']), item['sub'])
>
> and it should work.
>
> Without creating the regexp, gsub! would look for a
> literal '/PROMO1=[A-Za-z0-9]+/' in the argument, not for a Regexp. (As I
> wrote in my previous post, you can store directly a in the YAML file:
>
>   search: !ruby/regexp /PROMO1=[A-Za-z0-9]+/
> ).
>
> By the way, you don't need to store the return value of YAML::load_documents
> in a variable.
>
> I hope this helps
>
> Stefano

Thanks a lot for your help Stefano! It works great!

Cheers :)