#!/bin/bash -e

pkg=vim-tiny
variant=tiny
mandir=/usr/share/man

# two things to do:
# 1) add /usr/bin/vim.variant as alternative for /usr/bin/vim. Priority are
#    chosen accordingly to the principle: ``more features, higher priority''
# 2) add /usr/bin/gvim as an alternative for gnome-text-editor for variants
#    built with gnome support. Same principle for the priority above, with the
#    additional constraint that priority should not be higher than gedit's

add_gnome_alternative () {
  if [ -f /usr/bin/gvim ]; then
    update-alternatives --install /usr/bin/gnome-text-editor \
      gnome-text-editor /usr/bin/vim.$variant $1 \
      --slave $mandir/man1/gnome-text-editor.1.gz gnome-text-editor.1.gz \
              $mandir/man1/vim.1.gz
  fi
}

add_variant_alternative () {
  update-alternatives --install /usr/bin/vim vim /usr/bin/vim.$variant $1
  update-alternatives --install /usr/bin/vimdiff vimdiff /usr/bin/vim.$variant $1
  update-alternatives --install /usr/bin/rvim rvim /usr/bin/vim.$variant $1
  update-alternatives --install /usr/bin/rview rview /usr/bin/vim.$variant $1
  # Since other packages provide these commands, we'll setup alternatives for
  # their manpages, too.
  for i in vi view ex editor ; do
    update-alternatives \
      --install /usr/bin/$i $i /usr/bin/vim.$variant $1 \
      --slave $mandir/fr/man1/$i.1.gz $i.fr.1.gz $mandir/fr/man1/vim.1.gz \
      --slave $mandir/fr.ISO8859-1/man1/$i.1.gz $i.fr.ISO8859-1.1.gz $mandir/fr.ISO8859-1/man1/vim.1.gz \
      --slave $mandir/fr.UTF-8/man1/$i.1.gz $i.fr.UTF-8.1.gz $mandir/fr.UTF-8/man1/vim.1.gz \
      --slave $mandir/it/man1/$i.1.gz $i.it.1.gz $mandir/it/man1/vim.1.gz \
      --slave $mandir/it.ISO8859-1/man1/$i.1.gz $i.it.ISO8859-1.1.gz $mandir/it.ISO8859-1/man1/vim.1.gz \
      --slave $mandir/it.UTF-8/man1/$i.1.gz $i.it.UTF-8.1.gz $mandir/it.UTF-8/man1/vim.1.gz \
      --slave $mandir/pl/man1/$i.1.gz $i.pl.1.gz $mandir/pl/man1/vim.1.gz \
      --slave $mandir/pl.ISO8859-2/man1/$i.1.gz $i.pl.ISO8859-2.1.gz $mandir/pl.ISO8859-2/man1/vim.1.gz \
      --slave $mandir/pl.UTF-8/man1/$i.1.gz $i.pl.UTF-8.1.gz $mandir/pl.UTF-8/man1/vim.1.gz \
      --slave $mandir/ru/man1/$i.1.gz $i.ru.1.gz $mandir/ru/man1/vim.1.gz \
      --slave $mandir/man1/$i.1.gz $i.1.gz \
              $mandir/man1/vim.1.gz
  done
  case "$variant" in
    gtk|gnome|lesstif) # gui enabled variants
      add_gui_variant_alternative $1
      ;;
  esac
}

add_gui_variant_alternative () {
  for i in gvim gview rgview rgvim evim eview gvimdiff ; do
    update-alternatives --install /usr/bin/$i $i /usr/bin/vim.$variant $1
  done
}

replace_dir_w_symlink () {
  if [ -d $1 -a ! -L $1 ]; then
    (rmdir $1 && ln -fs $2 $1) || true
  fi
}

case "$pkg" in
  vim-tiny)
    add_variant_alternative 10
    ;;
  vim)
    add_variant_alternative 30
    replace_dir_w_symlink /usr/share/doc/vim vim-common
    ;;
  vim-nox)
    add_variant_alternative 40
    ;;
  vim-gtk|vim-lesstif)
    add_variant_alternative 50
    ;;
  vim-gnome) # gnome enabled variant
    add_variant_alternative 60
    add_gnome_alternative 45
    ;;
esac



exit 0