#!/bin/sh -e 

# Periodically subversion's internal file system format changes.  The change
# necessitates a dump using an older version of svnadmin (a version that
# understands the old filesystem format).  Then a new svnadmin and the dumpfile
# created by the old svnadmin can be used to create a repository in the new
# format.  

# To facilitate users moving the repository from the old to the new format we
# included a statically linked copy of svnadmin starting with version 0.15.0.


OLD_VERSION="$2"

case "$1" in
  upgrade)
    # before 0.15.0 we didn't create a static binary.
    if dpkg --compare-versions "$OLD_VERSION" ge 0.15.0 ; then
      if dpkg --compare-versions "$OLD_VERSION" lt 0.28.0 ; then
        # Remove any previously saved versions >>= 0.15.0 and << 0.28.0
	# One might be left behind if the system has been upgraded
	# from << 0.28.0 to >> 0.28.0 more than once with different
	# OLD_VERSION's
	rm /usr/bin/svnadmin-0.1[5-9].[0-9]* > /dev/null 2>&1 || true
	rm /usr/bin/svnadmin-0.2[0-7].[0-9]* > /dev/null 2>&1 || true
        cp /usr/bin/svnadmin-static /usr/bin/svnadmin-$OLD_VERSION
      fi
      if dpkg --compare-versions "$OLD_VERSION" lt 0.35.1 ; then
	rm /usr/bin/svnadmin-0.3[0-3].[0-1]* > /dev/null 2>&1 || true
        cp /usr/bin/svnadmin-static /usr/bin/svnadmin-$OLD_VERSION
      fi
    fi
  ;;
  abort-upgrade|install)

  ;;
  *)
    echo "preinst called with unknown argument \`$1'" >&2
    exit 1
  ;;
esac