From: Andrew Ford <[EMAIL PROTECTED]>
I am just delving into Template::Filters to add an enhancement to the latex/pdf filter, namely to rerun latex/pdflatex if there are undefined references after the first run.Yes, I have also used CGI and TT with latex filter in a similiar scenario, and the enhancements you listed below would be very welcome ;)
* set the TEXINPUTS environment variable to include the directory the template was found in, so that file inclusion (in latex) picks up files in that directory (the template is copied to a temporary directory and latex is run in that directory so that temporary files can be cleaned up after the template has been filtered).Or perhaps a more generic mechanism for setting arbitrary environment variable. Also of value would be a possibility to set some TeX variables, like \graphicspath{} from graphics package, but I do not see a good way to implement this.
[...]
"tmpdir" to specify a 'temporary' directory for debugging -- this would not be deleted by tt2 after processing the template, so that one could go in and sort out latex problemsAlso sometimes I wished for an 'output_errors' option which would output TeX errors to a given file (or instead of normal template output), so that it can be easier obtained remotely.
A warning when the filter output is written to a text-mode stream would be useful for a newbies, who (like me) forget to put binmode=>1 in process directive.
I am still at the planning stage for this and would welcome comments and suggestions.I am not a TT developer, but from the general spirit of TT I would suggest to investigate the idea of generic Template::Filter::External.
Such a filter could set environment varialbes, write per-filter text to a temp file, execute one or more external programs, than read their output and return it as a filtered text.
After that, latex filter can be implemented as a special case. Another application which immediately comes on mind is DocBook and other similiar document generators. Still other is an auto-packaging feature for generating archived downloads on demand.
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