$topic- the name of the topic in the current CGI query
$web- the name of the web in the current CGI query
$user- the login name of the user
$installWeb- the name of the web the plugin topic is in (usually the same as
Foswiki::Func::writeWarningand return 0. In this case %FAILEDPLUGINS% will indicate which plugins failed. In the case of a catastrophic failure that will prevent the whole installation from working safely, this handler may use 'die', which will be trapped and reported in the browser. Note: Please align macro names with the Plugin name, e.g. if your Plugin is called FooBarPlugin, name macros FOOBAR and/or FOOBARSOMETHING. This avoids namespace issues.