[chef] Re: FileEdit - search_file_replace_line - Replace with content found

[Matthew Moretti < >]

I notice in poking through the source that Chef::Util::FileEdit#replace uses gsub!, while Chef::Util::FileEdit#replace_line doesn’t.

gsub! will use your backreferences. Since your regexp starts with ^ and ends with .*, it will match the entire line anyways; perhaps try replace instead?

Matt Moretti

​

On Thu, Aug 27, 2015 at 8:34 AM, Alexander Skwar < " target="_blank"> > wrote:

Hello

We are using chef-solo 11.8.2 and in a recipe, I'd like to use
Chef::Util::FileEdit.search_file_replace_line to replace a line
matching some regexp and "capture" what has been found and use this in
the replacement.

How? :)


Now, in a recipe, we have got the following:

ruby_block "CIS: AutoFS start deaktivieren" do
    block do
        fe = Chef::Util::FileEdit.new("/etc/init/autofs.conf")
        # "start on" auskommentieren
        fe.search_file_replace_line(/^(start on.*)/,
            "# removed because of CIS check:\n# \1"
            )

        # Datei schreiben
        fe.write_file
    end # of block do
end # of ruby_block "CIS: AutoFS start deaktivieren" do



This is supposed to comment any lines starting with "start on" in the
autofs.conf file. It should replace the lines with the following
"block":


# removed because of CIS check:
# start on...

With perl, I used to have this:

perl -pi -e 's/^(start on.*)/# removed because of CIS check:\n# $1/'
/etc/autofs.conf

This works.


But this does not:

        fe.search_file_replace_line(/^(start on.*)/,
            "# removed because of CIS check:\n# \1"
            )

It has replaced the "start on" lines just fine, but it added a \1...
It should have replaced the \1 by what's in the first "caputre"
(parentheses; ie. what's in "(" .. ")"; ie. "start on" and whatever is
following it).

How to do that?



Thanks a lot,



Alexander
--
=>        Google+ => http://plus.skwar.me         <==
=> Chat (Jabber/Google Talk) => "> <==