Need to replace part of a string with another string

I'm still pretty new to perl and regex and need some help getting started. I would love to provide some code, but that's kinda where I'm stuck.

What I'm trying to do is that I have this string in a file like this:

dn: CN=doe\, john,OU=Users,DC=domain,DC=com

and a string like this:

uid: d12345

I need to do a search and replace to get the following result.

dn: uid= d12345,OU=Users,DC=domain,DC=com

Can anyone help me get started with this one开发者_如何学Python? Much thanks!

So you want to replace CN=doe\, john with uid= d12345? Try this:

$uidString = "uid: d12345";
$dnString = "dn: uid= d12345,OU=Users,DC=domain,DC=com";

if( $uidString =~ /uid: (\w+)/ ) {
  $uid = $1;
  $dnString =~ s/CN=.+?[^\\],/uid= $uid,/;
}

That will replace everything from CN= to the first unescaped comma with the uid.

Won't a one line regex do the trick?

use strict;
use warnings;

my $a = "dn: CN=doe\, john,OU=Users,DC=domain,DC=com";
my $b= "uid: d12345";
#the regex
$a =~ s/CN(.*?), .*?,/$b,/;

print "$a";

I suspect your DNs and uids will be dynamic. Here is something that will help. The regex will substitute CN= all the way until the comma with whatever string you put in $uid.

#!/usr/bin/env perl

use strict;
use warnings;

my $string = 'dn: CN=doe\, john,OU=Users,DC=domain,DC=com';
my $uid_str  = 'uid: d12345';
my ($uid) = $uid_str =~ m/^uid:(.+)$/;
$string =~ s/CN=.+(,OU=.+$)/uid=$uid$1/;

print "String is: $string\n";

Output: String is: dn: uid= d12345,OU=Users,DC=domain,DC=com