Item3784: Rename across webs bugs

I moved TWiki:Codev/MediaWikiConversion to TWiki:Plugins/MediaWikiToTWikiAddOnDev. Besides taking more than 5 minutes and resulting in an "internal server" HTML formatted error delivered in plain text to the browser, there are several issues with rename across webs:

1. The Codev web has a topic called ML. References to HTML have been converted to HTCodev.ML and, references to XML to XCodev.ML.

2. Escaped words are prefixed with "Codev". For example, !MediaWiki turns into !Codev.MediaWiki.

3. URLs containing a WikiWord of an existing topic in the Codev web get destroyed. For example, [[http://trac.edgewall.org/wiki/TracWiki][the Trac Wiki engine]] turns into [[http://trac.edgewall.org/wiki/Codev.TracWiki][the Trac Wiki engine]].

(I fixed the topic manually.)

-- TWiki:Main/PeterThoeny - 18 Mar 2007

Possibly related to Item3760.

-- TWiki:Main.ArthurClemens - 18 Mar 2007

I believe the problem exists in Render.pm, in sub replaceTopicReferences. It looks like the second to last search/replace is too aggressive.

$text =~ s/(\W|^)$args->{oldTopic}\b/$1$repl/g;

makes more sense to me.

-- TWiki:Main.CrawfordCurrie - 20 Mar 2007

Worth making sure the regex is I18N-safe - \w is always a bad idea because platforms such as Windows have broken Perl locales... See TWiki:Codev.InternationalisationGuidelines.

I originally spent some time making renames work for I18N, but didn't manage to fix the other bugs like this.

-- TWiki:Main.RichardDonkin - 20 Mar 2007

\W not \w. Really \b ought to work, but it was removed in the past for some reason, so I assume it was tried but had other problem.

-- TWiki:Main.CrawfordCurrie - 21 Mar 2007

Fixed on MAIN but not merged to patch branch.

Could also do with some user testing.

CC