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#!/usr/bin/env perl
# $Id$
# Return information given a TL package name (i.e., a tpm file name).
# Currently just the ctan directory for package, but maybe we'll do more
# later.
# 
exit (&main ());

sub main
{
  $CTAN = $ENV{"CTAN"} || "/home/ftp/tex-archive";
  if ($ARGV[0] eq "--ctan-dir") {
    return &find_ctan_dir ($ARGV[1]);
  } else {
    die "$0: only know about --ctan-dir PKGNAME.\n";
  }
}


# 
# The CTAN path to a package is sometimes stored in the TeX Catalogue,
# but old entries don't have it, etc.  Still, we should use it if present.xx
# Return 0 for success if we find a path (and print it on stdout), else
# return 1.
# 
sub find_ctan_dir
{
  my ($me) = @_;
  return 1 unless $me;  
  
  (my $menobin = $me) =~ s,^bin-,,;
  (my $menodash = $me) =~ s,^.*-,,;
  (my $menopowerdot = $me) =~ s,^powerdot-,,;
  (my $menotype1 = $me) =~ s,-type1$,,;

  my $ctan_dir = "";

  for my $dir (
    "macros/latex/contrib/$me",			# most everything
    "macros/latex/contrib/\L$me",		# HA-prosper
    "macros/latex/contrib/powerdot/contrib/$menopowerdot", # powerdot-doc-vn
    "macros/latex/exptl/$me",			# semioneside
    "macros/latex/required/$me",		# babel
    "macros/plain/$me",				# plnfss
    "macros/xetex/latex/$me",			# xetex
    "macros/generic/$me",			# abbr
    "macros/generic/diagrams/$me",		# circ
    "macros/$me",				# eplain
    "support/$me",				# thumbpdf
    "support/$menobin",				# bin-thumbpdf
    "language/vietnamese/$me/unpacked",		# vntex
    "language/hyphenation/$me",			# bghyphen
    "language/hebrew/$me",			# cjhebrew
    "language/greek/package-babel/$me",		# ibycus-babel
    "language/coptic/$me",			# cbcoptic
    "info/math/voss/$me",			# mathmode
    "info/lshort/$menodash",			# lshort-english
    "info/bibtex/$me",				# tamethebeast
    "info/symbols/$me",				# comprehensive
    "info/$me",					# Type1fonts
    "graphics/$me",				# sparklines
    "graphics/metapost/contrib/macros/$me",	# mpattern
    "graphics/pstricks/contrib/pedigree/$me",	# pst-pdgr
    "graphics/pstricks/contrib/$me",		# pstricks-add
    "fonts/$me",				# MnSymbol
    "fonts/utilities/$me",			# accfonts
    "fonts/ps-type1/$me",			# cm-super
    "fonts/ps-type1/$menotype1",		# esint-type1
    "fonts/greek/$me",				# lfb
    "fonts/gothic/$me",				# blacklettert1
    "fonts/cyrillic/$me/texmf",			# lh
    "fonts/chess/$me",				# skaknew
    "biblio/bibtex/contrib/$me",		# dk-bib
               ) {
    if (-d "$CTAN/$dir") {
      $ctan_dir = $dir;
      last;
    }
  }
  
  # names totally dissimilar
  $ctan_dir = "fonts/fourier-GUT" if $me eq "fourier";
  $ctan_dir = "info/biblio" if $me eq "beebe";
  $ctan_dir = "info/italian/amsldoc" if $me eq "amsldoc-it";
  $ctan_dir = "info/italian/amsthdoc" if $me eq "amsthdoc-it";
  $ctan_dir = "info/tex-references" if $me eq "tex-refs";
  $ctan_dir = "language/basque" if $me eq "hyphen-basque";
  $ctan_dir = "language/devanagari/velthuis" if $me eq "devanagr";
  $ctan_dir = "language/hyphenation" if $me eq "hyphen-german";
  $ctan_dir = "language/hyphenation/elhyphen" if $me eq "hyphen-greek";
  $ctan_dir = "macros/latex/contrib/misc" if $me eq "ltxmisc";
  $ctan_dir = "macros/generic" if $me eq "genmisc";

  # do last, for sake of subdirs above.
  $ctan_dir = "language/hyphenation"
    if $me =~ /^hyphen-/ && ! $ctan_dir;

  print "$CTAN/$ctan_dir\n" if $ctan_dir;
  return $ctan_dir ? 0 : 1;
}

# this was the inverse code from ctan2tl, saving for a while until i get
# a better grip.
## case "$pkg" in
##   biblio)	   pkg=beebe;;
##   fourier-GUT)     pkg=fourier;;
##   generic)	   pkg=genmisc;;  # $ctan/macros/generic
##   ha-prosper)	   pkg=HA-prosper;;
##   misc)		   pkg=ltxmisc;;  # until we do real misc package.
##   tex-references)  pkg=tex-refs;;
##   velthuis)	   pkg=devanagr;;
##   voss)		   pkg=voss-de;;
## esac
## 
## # lshort is arranged by language.
## pkgdir=`dirname $ctan_dir1`
## up=`basename $pkgdir`
## test "$up" = lshort && pkg=lshort-$pkg
## 
## # esint is split into two.
## test "$pkg" = esint && test "$up" = ps-type1 && pkg=esint-type1
## 
## # vntex, powerdot, lh aare in unpacked subdirs.
## test "$pkg" = unpacked && test "$up" = vntex && pkg=vntex
## test "$pkg" = distrib && test "$up" = powerdot && pkg=powerdot
## test "$pkg" = texmf && test "$up" = lh && pkg=lh
## 
## # powerdot-doc-vn is a couple subdirs down.
## test "$pkg" = doc-vn && test "$up" = contrib && pkg=powerdot-doc-vn
## 
## # amslatex/vietnamese.
## test "$pkg" = vietnamese && test "$up" = amslatex && pkg=amsldoc-vn