#!/bin/sh -e
# postinst script for perforce-swarm
#
# 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"
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"
 
APACHE_SITESDIR="/etc/apache2/sites-available"
SWARM_VHOST="$APACHE_SITESDIR/perforce-swarm-site.conf"
APACHE_USER="www-data"
APACHE_GROUP="$APACHE_USER"
 
CRON_DIR="/etc/cron.d"
CRON_SCRIPT="$CRON_DIR/perforce-swarm"
CRON_CONFIG="$PERFORCE_CFGDIR/swarm-cron-hosts.conf"
 
PHPINI_DIR="/etc/php5/conf.d"
PHPMOD_DIR="/etc/php5/mods-available"
 
if [ -d "$PHPMOD_DIR" ]; then
    P4PHP_INI="${PHPMOD_DIR}/perforce.ini"
else
    P4PHP_INI="${PHPINI_DIR}/perforce.ini"
fi
 
do_configure()
{
    if [ -z "$1" ]; then
        mode=install
    else
        mode=upgrade
        from_version="$1"
        from_version_major="${from_version%%-*}"
    fi
 
    # Ensure P4PHP is configured
    p4php_good=0
    while true; do
        phpver="$(php -v 2> /dev/null | sed -e '/^PHP/s/PHP \([0-9]\)\.\([0-9][0-9]*\).*/\1\2/;q')"
        if [ -z "$phpver" ]; then
            error_msg="Could not parse version from 'php -v'"
            break
        fi
 
        # Check if a variant of P4PHP is available
        osplat="$(uname -m | sed -e 's/i.86/x86/')"
        p4php_variant="$SWARM_ROOT/p4-bin/bin.linux26${osplat}/perforce-php${phpver}.so"
        if [ ! -s "${p4php_variant}" ]; then
            error_msg="Invalid P4PHP variant [$p4php_variant] for [$(php -v 2> /dev/null | head -n1 | awk '{print $1,$2}')] on [$osplat]"
            break
        fi
 
        if [ ! -d "$PHPINI_DIR" -a ! -d "$PHPMOD_DIR" ]; then
            error_msg="Cannot find PHP configuration directory [$PHPINI_DIR] or [$PHPMOD_DIR]"
            break
        fi
 
        local new_p4php_ini="$P4PHP_INI.dpkg-new"
        cat << __P4PHP_INI__ > "$new_p4php_ini"
; P4PHP Extension (for Perforce Swarm)
extension=${p4php_variant}
__P4PHP_INI__
 
        # Put new file into place only if one doesn't exist
        if [ -r "$P4PHP_INI" ]; then
            # Check if it's the same
            if diff -q "$new_p4php_ini" "$P4PHP_INI" > /dev/null; then
                # No difference, so remove what we created
                rm -f "$new_p4php_ini"
            else
                # Different, so leave it as *.dpkg-new
                echo "$THISPKG: warning: $P4PHP_INI created as $new_p4php_ini"
            fi
        else
            # Move into place
            mv "$new_p4php_ini" "$P4PHP_INI"
        fi
 
        # If using mods-available, we must activate the module
        if [ -d "$PHPMOD_DIR" ]; then
            php5enmod perforce
        fi
 
        php --ri perforce > /dev/null 2>&1
        if [ $? -eq 0 ]; then
            p4php_good=1
        else
            p4php_good=0
 
            if [ -z "$error_msg" ]; then
                error_msg="Failed to activate the P4PHP extension"
            fi
        fi
 
        break
    done
 
    if [ $p4php_good -ne 1 ]; then
        cat << __P4PHP_WARNING__
 
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!
!!  $THISPKG: Warning: Trouble configuring P4PHP
!!  Problem:
!!  $error_msg
!!
!!  Swarm cannot function without P4PHP; please investigate and rectify.
!!
!!  To manually configure P4PHP, add a line to your php.ini with:
!!  extension=$SWARM_ROOT/p4-bin/bin.<plat>/perforce-php<ver>.so
!!
!!  You can confirm it works by running:
!!
!!      php --ri perforce
!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
__P4PHP_WARNING__
    fi
 
    # We suppress this message if the config is already present
    if [ "$mode" = "install" ] && [ ! -e $SWARM_CONFIG ]; then
        cat << __POST_INSTALL_MSG__
 
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
::  Swarm is now installed, but not yet configured.
::  You must run the following to configure Swarm (as root):
::
::      sudo $SWARM_SBINDIR/configure-swarm.sh
::
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
__POST_INSTALL_MSG__
 
    elif [ "$mode" = "upgrade" ]; then
 
        # Ensure our site is enabled
        echo "$THISPKG: enabling the Perforce Swarm Apache site..."
        a2ensite perforce-swarm-site.conf
 
        # Restart Apache to kill old workers
        echo "$THISPKG: restarting Apache to update Swarm workers..."
        service apache2 restart
 
        cat << __POST_UPGRADE_MSG__
 
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
::  Swarm has been upgraded, using the existing config.
::
::  If you wish to change any settings, you can run the following to
::  reconfigure Swarm (as root):
::
::      sudo $SWARM_SBINDIR/sbin/configure-swarm.sh
::
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
__POST_UPGRADE_MSG__
    fi
 
    return 0
}
 
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