Item8988: LatexModePlugin changes $ENV{HOME}. This causes action-at-a-distance problems for installers

LatexModePlugin changes $ENV{HOME}, which if not set in $Foswiki::cfg{Plugins}{LatexModePlugin}{home} is set to '/home/nobody', which messes up anything else which depends upon $ENV{HOME}.

For example, $EN{HOME} is used by File::HomeDir, which is called as part of CPAN::Shell, which is invoked by tools/extender.pl, which is called by the installer scripts.

Whatever it is using $ENV{HOME} for, it should be localized to this module.

Thanks!

-- DiabJerius - 07 May 2010

I've attached a patch which stores $ENV{HOME} in the LMPcontext, then uses it for only those sysCommand calls which it seems should require it. I've tried to localize it in as narrow a scope as possible. I added an extra parameter to Render::makePNGs to pass the value in for mimetex. I'm not familiar with that package, so if it doesn't need HOME, then one could remove that hack.

-- DiabJerius - 07 May 2010

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