#!/bin/bash

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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 [ -s './apisix/cli/apisix.lua' ]; then
    # install via source
    APISIX_LUA=./apisix/cli/apisix.lua
elif [ -s '/usr/local/share/lua/5.1/apisix/cli/apisix.lua' ]; then
    # install via luarock
    APISIX_LUA=/usr/local/share/lua/5.1/apisix/cli/apisix.lua
elif [ -s '/usr/local/apisix/deps/share/lua/5.1/apisix/cli/apisix.lua' ]; then
    # install via shell
    APISIX_LUA=/usr/local/apisix/deps/share/lua/5.1/apisix/cli/apisix.lua
else
    # install via official rpm or docker
    APISIX_LUA=/usr/local/apisix/apisix/cli/apisix.lua
fi

# find the openresty
OR_BIN=$(which openresty || exit 1)
OR_EXEC=${OR_BIN:-'/usr/local/openresty-debug/bin/openresty'}
OR_VER=$(openresty -v 2>&1 | awk -F '/' '{print $2}' | awk -F '.' '{print $1"."$2}')
LUA_VERSION=$(lua -v 2>&1| grep -E -o  "Lua [0-9]+.[0-9]+")

if [[ -e $OR_EXEC && "$OR_VER" =~ "1.19" ]]; then
    # OpenResty version is 1.19, use luajit by default
    # find the luajit binary of openresty
    LUAJIT_BIN=$(${OR_EXEC} -V 2>&1 | grep prefix | grep -Eo 'prefix=(.*)/nginx\s+--' | grep -Eo '/.*/')luajit/bin/luajit

    # use the luajit of openresty
    echo "$LUAJIT_BIN $APISIX_LUA $*"
    exec $LUAJIT_BIN $APISIX_LUA $*
elif [[ "$LUA_VERSION" =~ "Lua 5.1" ]]; then
    # OpenResty version is not 1.19, use Lua 5.1 by default
    echo "lua $APISIX_LUA $*"
    exec lua $APISIX_LUA $*
else
    echo "ERROR: Please check the version of OpenResty and Lua, OpenResty 1.19 + LuaJIT or OpenResty before 1.19 + Lua 5.1 is required for Apache APISIX."
fi