# Version: 0.3.4
# Copyright (c) 2005-2017:
#   Darren 'Tadgy' Austin <darren (at) afterdark.org.uk>
# Licensed under the terms of the GNU General Public License version 3.

install_file() {
  # $1 = Path of file to process (without leading /, with .new extension)

  [ -z "$1" -o ! -e "$1" ] && return
  local OLDFILE="${1%.new}"
  local NEWMD5="$(md5sum "$1" 2>/dev/null | cut -d' ' -f1)"
  local OLDMD5="$(md5sum "$OLDFILE" 2>/dev/null | cut -d' ' -f1)"
  local PREVMD5S="$(grep -P "^[[:alnum:]]{32}[[:blank:]]+(/)?\Q$OLDFILE\E(\.new)?[[:blank:]]*$" \
    install/slack-install 2>/dev/null | grep -Eo '^[[:alnum:]]{32}')"

  if [ ! -e "$OLDFILE" ]; then
    mv "$1" "$OLDFILE"
  elif [ "$NEWMD5" = "$OLDMD5" ]; then
    rm -f "$1"
  elif echo "$PREVMD5S" | grep -v "^$NEWMD5$" | grep "^$OLDMD5$" >/dev/null 2>&1; then
    cat "$1" >"$OLDFILE" &&
    rm -f "$1"
  else
    #     |--------|-----------------------------------------------------------|
    echo "WARNING: $OLDFILE"
    echo "         has been customised since original installation and was not"
    echo "         replaced with the incoming .new file."
    echo
  fi
}

# Install new configuration files.
install_file "FIXME/FIXME.new"

# List info pages in the directory.
[ -x usr/bin/install-info ] && usr/bin/install-info %BUILD_PREFIX%/info/FIXME.info.gz %BUILD_PREFIX%/info/dir

# Add required user/group.
# Note: groups need to be added before users.
grep "^FIXME_GROUPNAME:" etc/group >/dev/null 2>&1 || {
  if chroot . usr/sbin/groupadd -g FIXME_GID -r FIXME_GROUPNAME && chroot . usr/sbin/grpconv; then
    echo -e "NOTICE:  Added new system group: FIXME_GROUPNAME (FIXME_GID).\n"
  else
    echo -e "WARNING: Failed to add required group: FIXME_GROUPNAME.\n"
  fi
}
grep "^FIXME_USERNAME:" etc/passwd >/dev/null 2>&1 || {
  if chroot . usr/sbin/useradd -d FIXME_HOMEDIR -g FIXME_GROUPNAME -M -N -r -s /bin/false -u FIXME_UID FIXME_USERNAME && chroot . usr/sbin/pwconv; then
    echo -e "NOTICE:  Added new system user: FIXME_USERNAME (FIXME_UID)\n"
  else
    echo -e "WARNING: Failed to add required user: FIXME_USERNAME.\n"
  fi
}

# Add service start to rc.local
fgrep '/etc/rc.d/rc.FIXME' etc/rc.d/rc.local >/dev/null 2>&1 || {
  echo >>etc/rc.d/rc.local
  echo 'if [ -x /etc/rc.d/rc.FIXME ]; then' >>etc/rc.d/rc.local
  echo '  /etc/rc.d/rc.FIXME start' >>etc/rc.d/rc.local
  echo 'fi' >>etc/rc.d/rc.local
}

# If rc.local_shutdown doesn't exist, create it.
[ -e etc/rc.d/rc.local_shutdown ] || {
  echo '#!/bin/sh' >etc/rc.d/rc.local_shutdown
  chmod 755 etc/rc.d/rc.local_shutdown
}

# Add service shutdown to rc.local_shutdown
fgrep '/etc/rc.d/rc.FIXME' etc/rc.d/rc.local_shutdown || {
  echo >>etc/rc.d/rc.local_shutdown
  echo 'if [ -x /etc/rc.d/rc.FIXME ]; then' >>etc/rc.d/rc.local_shutdown
  echo '  /etc/rc.d/rc.FIXME stop' >>etc/rc.d/rc.local_shutdown
  echo 'fi' >>etc/rc.d/rc.local_shutdown
}