#!/bin/bash
#
#  (c)2006, Laurence Withers. Released under the GNU GPL. See file
#  COPYING for details.
#

if [ $# -ne 1 ]
then
    echo "Updates an existing project to newer lw-build-system files."
    echo "Usage: $0 path/to/project/root"
    exit 1
fi

[ -z "${VERBOSE}" ] && VERBOSE="0"



#
# Sort out directories, checking that we're looking at a real project,
# and eventually include the standard functions
#
X=$(pwd)
cd $1 || exit 1
if [ ! -e make.sh -o ! -L scripts/module-create.sh ]
then
    echo "This doesn't look like an lw-build-system project to me."
    exit 1
fi

PROJECT_ROOT=$(pwd)
P=$(basename ${PROJECT_ROOT})
cd ${X}
cd $(dirname $0) || exit 1
SCRIPT_ROOT=$(pwd)

source skel/scripts/functions.sh || exit 1
do_cmd cd ${PROJECT_ROOT} || exit 1



#
# Prepare a 'new' project installation
#
echo "Beginning upgrade..."

if [ -e upgrade.tmp -o -e upgrade.diff ]
then
    print_failure "upgrade.tmp or upgrade.diff exist -- not overwriting"
    exit 1
fi

cleanup() {
    cd ${PROJECT_ROOT}
    rm -rf upgrade.tmp upgrade.diff
    print_failure "Removed upgrade temporary files."
    exit 1
}

do_cmd mkdir upgrade.tmp || cleanup
echo "DEBUG START"
ls
ls upgrade.tmp
echo "DEBUG END"
do_cmd_redir /dev/null ${SCRIPT_ROOT}/create.sh ${PROJECT_ROOT}/upgrade.tmp ${P} || cleanup
for module in src/*
do
    M=$(basename ${module})
    echo " Upgrading ${module}"

    if [ ! -e ${module}/.params ]
    then
        FAILED="${FAILED}
 - ${module}/.params missing (custom module?)"
        continue
    fi

    upgrade.tmp/${P}/scripts/module-create.sh $(cat ${module}/.params) > /dev/null
    if [ $? -ne 0 ]
    then
        FAILED="${FAILED}
 - ${module} could not be recreated (invalid params?)"
        continue
    fi
done

diff -ru --exclude='*.c' --exclude='*.cpp' --exclude='*.h' \
    ./ upgrade.tmp/${P} \
    > upgrade.diff

case "$?" in
0)
    print_success "Already up to date."
    rm upgrade.diff
    ;;

1)
    print_success "Upgrade complete. See upgrade.diff for diff."
    ;;

2)
    print_failure "Diff failed."
    cleanup
    ;;
esac

rm -rf upgrade.tmp

if [ ! -z "${FAILED}" ]
then
    print_failure "Upgrading of these modules failed: ${FAILED}"
fi

true

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