#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-3.0-or-later */
# Copyright (C) 2014 Stony Brook University
# Copyright (C) 2019 Invisible Things Lab
# Copyright (C) 2020 Intel Corporation
#                    Michał Kowalczyk <mkow@invisiblethingslab.com>
#                    Wojtek Porczyk <woju@invisiblethingslab.com>


# This is how we detect whether we're installed or running from inside git repo.
# If unchanged (i.e., if this reads IN_GIT between "at" characters), this is an
# ordinary string and test -n "$IN_GIT" is true. But when installing, this is
# rewritten using meson's configure_file() function to an empty string and the
# else branch is taken. See also: ./meson.build and
# https://mesonbuild.com/Reference-manual.html#configure_file.
IN_GIT=@IN_GIT@

if test -n "$IN_GIT"
then
    while :
    do
        case "$1" in
            "SGX")
                SGX=1
                export SGX
                ;;
            "GDB")
                GDB=1
                ;;
            *)
                break
                ;;
        esac
        shift
    done

    RUNTIME_DIR=$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")
    if [ -z "$PAL_HOST" ]; then
        if ! command -v make >/dev/null; then
            libpal="$RUNTIME_DIR/libpal-*.so"
            libpal="$(echo -n "$libpal")"
            libpal="${libpal//$RUNTIME_DIR\//}"
            if [ "$libpal" = 'libpal-*.so' ]; then
                echo "Unable to detect PAL_HOST. Please install the make program."
                exit 1
            fi

            array=("$libpal")
            if [ ${#array[@]} -ne 1 ]; then
                echo "Multiple libpal detected ($libpal). Please explicitly set the environment variable PAL_HOST."
                exit 1
            fi

            PAL_HOST="${libpal%.so}"
            PAL_HOST="${PAL_HOST#libpal-}"
        else
            PAL_HOST=$(make --no-print-directory --quiet -f "$RUNTIME_DIR/../Scripts/Makefile.configs" print_host 2>&1)
        fi
    fi
    PAL_CMD="$RUNTIME_DIR/pal-$PAL_HOST"
    LIBPAL_PATH=$(realpath "$RUNTIME_DIR/libpal-$PAL_HOST.so")
    HOST_PAL_PATH=$(realpath "$RUNTIME_DIR/../Pal/src/host/$PAL_HOST")
else
    PAL_CMD=@PAL_CMD@
    LIBPAL_PATH=@LIBPAL_PATH@
    HOST_PAL_PATH=@HOST_PAL_PATH@
    SGX=@SGX@
fi

APPLICATION=
ENVS=()
PREFIX=()

if [ "$GDB" == "1" ]; then
	PREFIX=("gdb" "-q")
	if [ -n "$INSIDE_EMACS" ]; then
		PREFIX+=("-i=mi")
	fi
	if [ 0"$SGX" -gt 0 ]; then
		PREFIX+=("-x" "$HOST_PAL_PATH/gdb_integration/graphene_sgx_gdb.py")
		ENVS+=("LD_PRELOAD=$HOST_PAL_PATH/gdb_integration/sgx_gdb.so:$LD_PRELOAD")
	else
		PREFIX+=("-x" "$HOST_PAL_PATH/gdb_integration/graphene_linux_gdb.py")
	fi
	if [ "$GDB_SCRIPT" != "" ]; then
        # Run a script in batch mode, and without TTY (so that it can be piped, redirected etc.)
		PREFIX+=("-x" "$GDB_SCRIPT" "-batch" "-tty=/dev/null")
	fi
	PREFIX+=("--args")
fi

if [ "$PERF" == "1" ]; then
	PREFIX=(perf stat)
fi

while [ "$1" != "" ];
do
	if [ "$APPLICATION" == "" ]; then
		APPLICATION=$1
		shift
		continue
	fi

	break
done

if [ "$APPLICATION" == "" ]; then
	echo "Usage: $0 [<application>] <args>..."
	exit 2
fi

if [ "$SGX" == "1" ] && [ ! -e "$APPLICATION.manifest.sgx" ]; then
    echo "Invalid application path specified ($APPLICATION.manifest.sgx does not exist)." >&2
    echo "The path should point to application configuration files, so that they can be" >&2
    echo "found after appending corresponding extensions." >&2
    exit 2
fi

if [ ! "$SGX" == "1" ] && [ ! -e "$APPLICATION.manifest" ]; then
    echo "Invalid application path specified ($APPLICATION.manifest does not exist)." >&2
    echo "The path should point to application configuration files, so that they can be" >&2
    echo "found after appending corresponding extensions." >&2
    exit 2
fi

if [ ! -f "$PAL_CMD" ]; then
	echo "$PAL_CMD not found"
	exit 1
fi

CMD=("${ENVS[@]}")
CMD+=("${PREFIX[@]}")
CMD+=("$PAL_CMD" "$LIBPAL_PATH" init "$APPLICATION" "$@")
exec env "${CMD[@]}"