#!/bin/sh -e
# postinst script for perforce-swarm-triggers
#
# see: dh_installdeb(1)

# Summary of how this script can be called:
# <postinst>                'configure'         <most-recently-configured-version>
# <old-postinst>            'abort-upgrade'     <new version>
# <conflictor's-postinst>   'abort-remove'      'in-favour'  <package> <new-version>
# <postinst>                'abort-remove'
# <deconfigured's-postinst> 'abort-deconfigure' \
#                           'in-favour' <failed-install-package> <version> \
#                           'removing'  <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package

ME="${0##*/}"
#echo "###########################"
#echo "[$ME] [$*]"

THISPKG="helix-swarm-triggers"
PERFORCE_ROOT="/opt/perforce"
PERFORCE_CFGDIR="$PERFORCE_ROOT/etc"
SWARM_ROOT="$PERFORCE_ROOT/swarm"
SWARM_DATADIR="$SWARM_ROOT/data"
SWARM_SBINDIR="$SWARM_ROOT/sbin"
SWARM_CONFIG="$SWARM_DATADIR/config.php"

SWARM_TRIG_BINDIR="$PERFORCE_ROOT/swarm-triggers/bin"
SWARM_TRIG_SCRIPT="$SWARM_TRIG_BINDIR/swarm-trigger.pl"
SWARM_CONFIG_SRCNAME="swarm-trigger.conf"
SWARM_TRIG_CONFIG="$PERFORCE_CFGDIR/$SWARM_CONFIG_SRCNAME"

do_configure()
{
    if [ -z "$1" ]; then
        mode=install
    else
        mode=upgrade
        from_version="$1"
        from_version_major="${from_version%%-*}"
    fi

    # Create the trigger config file template
    local good_swarm_trig_config=0
    while true; do
        if [ ! -r "$SWARM_TRIG_SCRIPT" ]; then
            error_msg="cannot find Swarm trigger script [$SWARM_TRIG_SCRIPT]"
            break
        fi

        local new_swarm_trig_config="$SWARM_TRIG_CONFIG.dpkg-new"
        mkdir -p "$(dirname "$new_swarm_trig_config")"

        sed -ne '/^# SWARM_HOST/,/^ADMIN_TICKET_FILE/p' "$SWARM_TRIG_SCRIPT" > "$new_swarm_trig_config"
        if [ $? -ne 0 ]; then
            error_msg="trouble composing new Swarm trigger config [$new_swarm_trig_config]"
            break
        fi

        # Put new file into place only if one doesn't exist
        if [ -r "$SWARM_TRIG_CONFIG" ]; then
            # Check if it's the same
            if diff -q "$new_swarm_trig_config" "$SWARM_TRIG_CONFIG" > /dev/null; then
                # No difference, so remove what we created
                rm -f "$new_swarm_trig_config"
            else
                # Different, so leave it as *.dpkg-new
                echo "$THISPKG: warning: $SWARM_TRIG_CONFIG created as $new_swarm_trig_config"
            fi
        else
            # Move into place
            mv "$new_swarm_trig_config" "$SWARM_TRIG_CONFIG"
        fi

        good_swarm_trig_config=1
        break
    done

    if [ $good_swarm_trig_config -ne 1 ]; then
        cat << __WARNING__

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!
!!  $THISPKG: Warning: problems creating Swarm trigger config file
!!  Problem:
!!  $error_msg
!!
!!  You must manually edit the following file as appropriate:
!!
!!      ${SWARM_TRIG_CONFIG}
!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

__WARNING__
    fi

    if [ "$mode" = "install" ]; then
        cat << __INSTALL_MSG__

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
::  Swarm Triggers are now installed, but not configured.
::  You must edit the following file as appropriate:
::
::      ${SWARM_TRIG_CONFIG}
::
::  Ensure you create the triggers in your Perforce server.
::
::  Reference:
::  http://www.perforce.com/perforce/doc.current/manuals/swarm/setup.perforce.html
::
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

__INSTALL_MSG__

    elif [ "$mode" = "upgrade" ]; then
        if [ "$from_version_major" = "2014.2" ]; then
            cat << __UPGRADE_MSG__

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
::  Swarm Triggers have been upgraded, but must be
::  reconfigured. You must edit the following file as appropriate:
::
::      ${SWARM_TRIG_CONFIG}
::
::  Ensure you update the triggers in your Perforce server, as new
::  entries have been added for this release. Reference:
::
::  http://www.perforce.com/perforce/doc.current/manuals/swarm/setup.perforce.html
::
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

__UPGRADE_MSG__
        else
            : # should be a smooth upgrade at this point
        fi
    fi
}

case "$1" in
    configure)
        do_configure "$2"
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    *)
        echo "$ME called with unknown argument [$1]" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0