#!/bin/sh
#
# Author:: Gwenhael Le Moine <gwenhael.le.moine@gmail.com>
# Copyright:: Copyright (c) 2013, Gwenhael Le Moine
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#
#     * Redistributions in binary form must reproduce the above
#       copyright notice, this list of conditions and the following
#       disclaimer in the documentation and/or other materials provided
#       with the distribution.
#
#     * Neither the name of the @organization@ nor the names of its
#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GWENHAEL LE MOINE BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

BUILD=${BUILD:=1}
TAG=${TAG:=SBo}
OUTPUT=${OUTPUT:=/tmp}
ARCH=${ARCH:=npmjs}
PREFIX=${PREFIX:=/usr}
NPMBIN=${NPMBIN:=/usr/bin/npm}
NPMROOT=${NPMROOT:-$($NPMBIN -g root)}

[ ! -x $NPMBIN ] && echo "npm missing" && exit 1
if [ "x$1" == "x" ] || [ "x$1" == "x--help" ] || [ "x$1" == "x-h" ]; then
    echo "$0 generates a Slackware compatible package from a node module"
    echo "  usage: <OPTIONS> $0 <modules_name>"
    echo "  The resulting package is located under $OUTPUT"
    echo "  possible OPTIONS are:"
    echo "    BUILD=<value>  (currently: $BUILD)"
    echo "    TAG=<value>    (currently: $TAG)"
    echo "    OUTPUT=<value> (currently: $OUTPUT)"
    echo "    ARCH=<value>   (currently: $ARCH)"
    echo "    PREFIX=<value> (currently: $PREFIX)"
    echo "    NPMBIN=<value> (currently: $NPMBIN)"
    echo "    NPMROOT=<value> (currently: $NPMROOT)"

    exit 1
fi

PRGNAM=$1
PKG=/tmp/$TAG/pkg-$PRGNAM

[ -e $PKG ] && rm -fr $PKG
mkdir -p $PKG

DESTDIR=$PKG npm install -g $PRGNAM

VERSION=$(grep -io "\"version\": \"\(.*\)\"" $PKG${NPMROOT}/$PRGNAM/package.json | sed 's|^[ ]*"version": "\(.*\)"|\1|g')
DESCRIPTION=$(grep -i "\"description\": \"\(.*\)\"," $PKG${NPMROOT}/$PRGNAM/package.json | sed 's|^[ ]*"description": "\(.*\)",$|\1|g')
HOMEPAGE=$(grep -i "\"homepage\": \"\(.*\)\"," $PKG${NPMROOT}/$PRGNAM/package.json | sed 's|^[ ]*"homepage": "\(.*\)",$|\1|g')

mkdir -p $PKG/install
cat <<EOF > $PKG/install/slack-desc
# HOW TO EDIT THIS FILE:
# The "handy ruler" below makes it easier to edit a package description.  Line
# up the first '|' above the ':' following the base package name, and the '|'
# on the right side marks the last column you can put a character in.  You must
# make exactly 11 lines for the formatting to be correct.  It's also
# customary to leave one space after the ':'.
       |-----handy-ruler------------------------------------------------------|
$PRGNAM: $PRGNAM ($DESCRIPTION)
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM: $HOMEPAGE
$PRGNAM:
EOF

cd $PKG
makepkg -l y -c n $OUTPUT/$PRGNAM-$(echo $VERSION | tr - .)-$ARCH-$BUILD$TAG.txz