SVN::Web::X - exceptions for SVN::Web

       Copyright 2003-2004 by Chia-liang Kao "<clkao@clkao.org>".

       Copyright 2005-2007 by Nik Clayton "<nik@FreeBSD.org>".

       Copyright 2012 by Dean Hamstead "<dean@fragfest.com.au>".

       This  program  is  free  software;  you can redistribute it and/or modify it under the same terms as Perl
       itself.

       See <http://www.perl.com/perl/misc/Artistic.html>

perl v5.40.1                                       2025-04-09                                   SVN::Web::X(3pm)

       SVN::Web::X implements exceptions for SVN::Web.  Derived from Exception::Class, It provides a simple
       mechanism for throwing exceptions, catching them, and ensuring that friendly, localised error messages
       are generated and sent to the user's browser.

Asimpleexception,withnoplaceholders.
       In the action:

         sub run {
             ...
             if(! frob_repo()) {
                 SVN::Web::X->throw(error => '(frob failed)',
                                    vars  => []);
             }
             ...
         }

       In the en.po file for the localised text.

         msgid "(frob failed)"
         msgstr "There was a problem trying to frob the repository.  This "
         "probably indicates a permissions problem."

   Anexceptionwithplaceholders
       In the action:

         sub run {
             ...
             # $path is a repo path, $rev is a repo revision
             my $root = $fs->revision_root($rev);
             my $kind = $root->check_path($path);

             if($kind == $SVN::Node::none) {
                 SVN::Web::X->throw(error => '(path %1 does not exist in rev %2)',
                                    vars  => [$path, $rev]);
             }
         }

       In the en.po file for the localised text.

         msgid "(path %1 does not exist in rev %2)"
         msgstr "The path <tt>%1</tt> could not be found in the repository "
         "at revision %2.  This may be a typo in the path or the revision "
         "number.  SVN::Web should never normally generate a link like this. "
         "If you followed a link from SVN::Web (rather than from an e-mail,
         "or similar) please report this as a bug."

       As you can see, the localised text can be much friendlier and more informative to the user than the error
       message.

       SVN::Web::X - exceptions for SVN::Web

         use SVN::Web::X;

         ...

         SVN::Web::X->throw(error => '(error message %1)',
                            vars => [$var_to_interpolate]);

       If an SVN::Web action that you are writing needs to stop processing and raise an error, throw an
       SVN::Web::X exception.

       throw() takes a hash with two mandatory keys.

       "error"
           A  string  describing  the error.  This string should be short, and key to a longer internationalised
           message.

           This string may contain placeholders; %1, %2, %3, and so on.  These will be replaced by the values of
           the variables passed in the "vars" key.

           By convention this string should be enclosed in parentheses, "(" and ")".  This helps make them stand
           out in the interface, if localised versions of the error message have not yet been written.

       "vars"
           An array reference.  The first entry in the array will replace the %1  placeholder  in  "error",  the
           second entry will replace the %2 placeholder, and so on.

           If there are no placeholders then pass a reference to an empty array.