#!/bin/bash

# rpmdev-newinit -- generate new init script from template
#
# Copyright (c) 2009 Ville Skyttä <ville.skytta@iki.fi>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

TEMPLATE=/etc/rpmdevtools/template.init
DEFNAME=newinitscript.init

version()
{
    cat <<EOF
rpmdev-newinit version 1.1

Copyright (c) 2009 Ville Skyttä <ville.skytta@iki.fi>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
EOF
}

help()
{
    cat <<EOF
rpmdev-newinit generates new init script from a template

EOF
    usage
    echo ""
    echo "Report bugs at <https://bugzilla.redhat.com/>, component rpmdevtools,"
    echo "or at <https://fedorahosted.org/rpmdevtools/>."
}

usage() {
    cat <<EOF
Usage: rpmdev-newinit [option]... [appname[.init]]

Options:
  -o FILE  Output the init script to FILE.  "-" means stdout.  The default is
           derived from <appname>, or "$DEFNAME" if appname is not given.
  -h       Show this usage message and exit.
  -v       Print version information and exit.

The template used is $TEMPLATE.
EOF
}

appname=
output=
output_set=

while [[ $1 ]] ; do
    case $1 in
        -o|--output)
            shift
            output="$1"
            output_set=1
            case $output in
                *.init) [[ -z $appname ]] && appname="$(basename $1 .init)" ;;
            esac
            ;;
        -h|--help)
            help
            exit 0
            ;;
        -v|--version)
            version
            exit 0
            ;;
        *.init)
            [[ -z $output ]] && output="$1"
            appname="$(basename $1 .init)"
            ;;
        *)
            appname="$1"
            [[ -z $output ]] && output="$appname.init"
            ;;
    esac
    shift
done

[[ -z $output ]] && output="$DEFNAME"
if [[ -f $output ]] ; then
    echo "Output file \"$output\" already exists, exiting."
    exit 2
elif [[ $output == - ]] ; then
    output=/dev/stdout
fi

if [[ -z $appname ]] ; then
    cat "$TEMPLATE" > "$output"
else
    sed -e "s|APPNAME|$appname|g" "$TEMPLATE" > "$output"
fi

if [[ $output != /dev/stdout ]] ; then
    echo "Skeleton init script has been created to \"$output\"."
fi