#!/bin/sh
# Nico Schottelius
# cinit: create dependency: service a needs or wants service b

set -e

# init variables
. $(dirname $0)/cinit.read-conf

BASEDIR=$DESTDIR/$CINIT_DIR

if [ $# -ne 3 ]; then
   echo "`basename $0`: service_A [wants|needs] service_B"
   echo ""
   echo "   Service A needs or needs Service B."
   echo "   Use relative paths, not absolute."
   echo "   You must specify whether to use wants or needs."
   echo ""
   exit 23
fi

SVC_A=$1
DEP=$2
SVC_B=$3

case $DEP in
   wants) DEP=$C_WANTS ;;
   needs) DEP=$C_NEEDS ;;
   *) echo "Did not I say \"want\" or \"need\"? You _must_ use those terms."
esac

# FIXME: could some PLEASE simply that?
SLASHES=$(echo $SVC_A | sed -e 's,/$,,' -e 's,[^/],,g' -e 's,/,../,g' -e 's,^,../../,')
DEST_NAME=$(echo $SVC_B | sed -e 's,/$,,' -e 's,/,-,g')

SOURCE="${SLASHES}${SVC_B}"
DEST="${BASEDIR}/${SVC_A}/${DEP}/${DEST_NAME}"

echo -n "Linking $SOURCE to $DEST ... "
ln -sf "$SOURCE" "$DEST"
echo "finished."