[MacPorts] #55106: dblatex add a -latex variant

[MacPorts]

#55106: dblatex add a -latex variant
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  Reporter:  nortcele     |      Owner:  neverpanic
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  dblatex      |
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Comment (by raimue):

 Other ports (LaTeXML, auctex, kde4-kile) already provide a +mactex variant
 that allows to use [http://www.tug.org/mactex/ MacTeX] instead of the
 texlive ports. Is your texlive installation completely custom? If your use
 case is also MacTeX, we might want to follow that naming scheme for
 consistency.

 You added `bin:mtxrun:...` as a dependency, however `proc
 dblatex.mktexlsr` only uses it if `-latex` is selected. Was that
 intentional? Note `texlive.mktexlsr` runs mtxrun if installed, so this
 functionality would now be missing. I would drop the dependency on mtxrun
 and write the proc like this:

 {{{
 proc dblatex.mktexlsr {} {
     if {[variant_isset latex]} {
         system "mktexlsr"
         system "if command -v mtxrun >/dev/null 2>&1; then mtxrun
 --generate; fi"
     } else {
         texlive.mktexlsr
     }
 }
 }}}

 Why does `post-deactivate` need to delete files? MacPorts removes all
 files it installed, so what would be left? If this was in case the value
 of TEXMFLOCAL changed between activate and deactivate, I do not think we
 can handle this. In the worst case, it could have unintended side effects.

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Ticket URL: <https://trac.macports.org/ticket/55106#comment:2>
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