#!/bin/sh

set -e

# Do the debhelper stuff immediately



######################################################
# Only act when we are called to configure the package
if [ "$1" != "configure" ]; then
    /usr/share/localepurge/gen-dpkg-cfg.pl
    exit 0
fi

. /usr/share/debconf/confmodule

##############################################
# The debconf routine for creating $CONFIGFILE
generate_config() {
    
    cat <<EOF
####################################################
# This is the configuration file for localepurge(8).
EOF
    if [ "x$1" = "x1" ]; then
        # Include the old don't modify message
        cat <<EOF
#
#      DO NOT EDIT!
#
# localepurge(8) uses debconf for storing all its 
# configuration. Manual entries to this file will be 
# irreversibly lost after upgrade or reinstallation 
# of localepurge. Configuration should only be done
# using the command
#
#       dpkg-reconfigure localepurge
#
EOF
    fi

    cat <<EOF
####################################################

####################################################
# Uncommenting this string enables the use of dpkg's
# --path-exclude feature.  In this mode, localepurge
# will configure dpkg to exclude the desired locales
# at unpack time.
#
# If enabled, the following 3 options will be
# disabled:
#
#  QUICKNDIRTYCALC
#  SHOWFREEDSPACE
#  VERBOSE
#
# And the following option will be enabled and cannot
# be disabled (unless USE_DPKG is disabled):
#
#  DONTBOTHERNEWLOCALE
#

EOF
    db_get localepurge/use-dpkg-feature
    if [ "$RET" = "true" ] ; then
        echo "USE_DPKG"
    else
        echo "#USE_DPKG"
    fi

    cat <<EOF
####################################################

####################################################
# Uncommenting this string enables removal of localized 
# man pages based on the configuration information for
# locale files defined below:

EOF

    db_get localepurge/mandelete

    if [ "$RET" = "true" ]; then
        echo MANDELETE
    else
        echo '#MANDELETE'
    fi

    cat <<EOF

####################################################
# Uncommenting this string causes localepurge to simply delete
# locales which have newly appeared on the system without
# bothering you about it:

EOF

    db_get localepurge/dontbothernew

    if [ "$RET" = "true" ]; then
        echo '#DONTBOTHERNEWLOCALE'
    else
        echo DONTBOTHERNEWLOCALE
    fi

    cat <<EOF

####################################################
# Uncommenting this string enables display of freed disk
# space if localepurge has purged any superfluous data:

EOF

    db_get localepurge/showfreedspace

    if [ "$RET" = "true" ]; then
        echo SHOWFREEDSPACE
    else
        echo '#SHOWFREEDSPACE'
    fi

    cat <<EOF

#####################################################
# Commenting out this string enables faster but less
# accurate calculation of freed disk space:

EOF

    db_get localepurge/quickndirtycalc

    if [ "$RET" = "true" ]; then
        echo '#QUICKNDIRTYCALC'
    else
        echo QUICKNDIRTYCALC
    fi

cat <<EOF

#####################################################
# Commenting out this string disables verbose output:

EOF

    db_get localepurge/verbose

    if [ "$RET" = "true" ]; then
        echo VERBOSE
    else
        echo '#VERBOSE'
    fi
 
    db_get localepurge/nopurge

    if [ "$RET" = "" ] || [ "$RET" = "PURGE_ALL" ]; then
        db_get localepurge/none_selected
        if [ "$RET" = "false" ]; then
            db_set localepurge/nopurge NEEDSCONFIGFIRST
            cat <<EOF

#################################################################
# Unless configured, the system's locale directories won't be
# touched. Execute "dpkg-reconfigure localepurge" to reconfigure 
# localepurge to make it actually start functioning.
#
# WARNING: Only commenting out the marker line "NEEDSCONFIGFIRST"
#          without having defined *any* locale files to keep below
#          will result in deletion of *all* locale files present
#          on the system. So *first* define which locale files you 
#          want to keep before commenting out the following line.

EOF
        elif [ "$RET" = "yes" ]; then
            db_set localepurge/nopurge PURGE_ALL
            cat <<EOF

#################################################################
# It has explicitly been requested to delete *all* locale files 
# present on the system and this will result in the definite loss 
# of all locale data in "/usr/share/locale/". You should know what
# you are doing or reconfigure "localepurge" as described above.
#################################################################

EOF
        fi
    else
        cat <<EOF

#####################################################
# Following locales won't be deleted from this system
# after package installations done with apt-get(8):

EOF
    fi
    
    db_get localepurge/nopurge
    echo "$RET" | grep -v PURGE_ALL | sed 's/,//g' | tr ' ' '\n'

}

##############################################
# Now deal with the configuration file
CONFIGFILE=/etc/locale.nopurge
TMPFILE=$(mktemp) || exit 1
 
# Remove file on exit
trap 'rm -f "$TMPFILE"' EXIT

# Generate new configuration file
generate_config 0 > "$TMPFILE" 2>&1
# Use ucf to move it into place while preserving user changes
ucf --debconf-ok "$TMPFILE" "$CONFIGFILE"
# And register the file with dpkg
ucfr localepurge $CONFIGFILE

# Ensure permissions are sane
if [ -f "$CONFIGFILE" ]; then
  chown root: $CONFIGFILE
  chmod 0644 $CONFIGFILE
fi

# generate the dpkg config file if necessary.
/usr/share/localepurge/gen-dpkg-cfg.pl