#!/bin/sh
# prerm for doc-base

# Abort if any command returns an error value
set -e

remove_docs ( ) {
  if command -v install-docs >/dev/null 2>&1; then
    install-docs -r doc-base || true
    install-docs -r install-docs-man || true
  else
    # error because we this *is* the doc-base package
    echo "cannot find install-docs on path" 1>&2
    exit 1
  fi
}

case "$1" in
  remove)
    # This package about to be removed.  There are two sub-cases.
    :
    if test "${2+set}" = set; then
      if test "$2" != in-favour; then
        echo "$0: undocumented call to \`prerm $*'" 1>&2
        exit 1
      fi
      # We are being removed because of a conflict with package $3
      # (version $4), which is now being installed.
      remove_docs
    else
      # The package is being removed in its own right.
      remove_docs
    fi
    ;;
  deconfigure)
    if test "$2" != in-favour -o "$5" != removing; then
      echo "$0: undocumented call to \`prerm $*'" 1>&2
      exit 1
    fi
    # Package $6 (version $7) which we depend on is being removed due
    # to a conflict with package $3 (version $4), and this package is
    # being deconfigured until $6 can be reinstalled.
    :
    ;;
  upgrade)
    # Prepare to upgrade FROM THIS VERSION of this package to version $2.
    # before 0.4 we didn't have 'install-docs-man' (typo in 0.4 as install-doc-man)
    if dpkg --compare-versions $2 lt 0.4; then
      install-docs -r install-docs-man || true
    fi
    ;;
  failed-upgrade)
    # Prepare to upgrade from version $2 of this package TO THIS VERSION.
    # This is only used if the old version's prerm couldn't handle it,
    # and returned non-zero.  (Fix old prerm bugs here.)
    if dpkg --compare-versions $2 lt 0.4; then
      install-docs -r install-docs-man || true
      install-docs -r install-doc-man || true
    fi
    ;;
  *) echo "$0: didn't understand being called with \`$1'" 1>&2
     exit 1;;
esac

exit 0
