#!/bin/bash
# Copyright 2014 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail

declare -a SPECIFIED_ELEMS

# Add a blank first element to the array, since we're running with -u, we don't
# want an unbound variable error if no element install types were specified.
SPECIFIED_ELEMS[0]=""

# List of all env vars to set install types
PREFIX="DIB_INSTALLTYPE_"
INSTALL_TYPE_VARS=$(env | grep ^$PREFIX | cut -d'=' -f1 || echo "")

for _install_type_var in $INSTALL_TYPE_VARS; do

    # Get the element name and its install type
    INSTALLDIRPREFIX=${_install_type_var:${#PREFIX}}
    INSTALLDIRPREFIX=${INSTALLDIRPREFIX//_/-}
    eval INSTALLTYPE=\$$_install_type_var

    # Create symlink for correct install type
    pushd $TMP_HOOKS_PATH/install.d
    if [ -d $INSTALLDIRPREFIX-$INSTALLTYPE-install ]; then
        ln -sf $INSTALLDIRPREFIX-$INSTALLTYPE-install/* .
    fi
    popd

    SPECIFIED_ELEMS+=($INSTALLDIRPREFIX)

done

# For any existing *-<default_install_dir>-install directory under install.d,
# if an environment variable setting a different install type was not seen,
# enable the default (set via --install-type).
default_install_type_dirs=$(find $TMP_HOOKS_PATH/install.d -maxdepth 1 -name "*-${DIB_DEFAULT_INSTALLTYPE}-install" -type d)
for _install_dir in $default_install_type_dirs; do
    SUFFIX="-${DIB_DEFAULT_INSTALLTYPE}-install"
    _install_dir=$(basename $_install_dir)
    INSTALLDIRPREFIX=${_install_dir%$SUFFIX}

    found=0
    for specified in ${SPECIFIED_ELEMS[@]}; do
        if [ "$specified" = "$INSTALLDIRPREFIX" ]; then
            found=1
            break
        fi
    done

    # install type not specified, assume source
    if [ "$found" = "0" ]; then
        pushd $TMP_HOOKS_PATH/install.d
        ln -sf $_install_dir/* .
        popd
    fi
done