configure

#! /bin/sh
#
# Convenience wrapper for easily viewing/setting options that
# the project's CMake scripts will recognize.
#
# Adapted from Zeek's wrapper.

# Defaults
cmake_build_directory="build"
cmake_build_type="RelWithDebInfo"
cmake_generator=""
cmake_install_prefix="/usr/local"
cmake_use_ccache="no"
cmake_use_doctest="yes"
cmake_use_sanitizers=""
cmake_use_werror="no"
cmake_use_static_linking="no"
cmake_openssl_root=""
cmake_osx_architectures=""

display_cmake=0
cache_entries=""

set -e
command="$0 $*"

cmake_exe="<no cmake>"
for i in cmake cmake3; do
    if command -v $i >/dev/null; then
        $i --version | grep -q "cmake.*version 3" && cmake_exe=$(command -v $i)
        break
    fi
done

type ${cmake_exe} > /dev/null 2>&1 || {
    echo "\
This package requires CMake, please install it first, then you may
use this configure script to access CMake equivalent functionality.\
" >&2;
    exit 1;
}

usage="\
Usage: $0 [OPTION]... [VAR=VALUE]...

  Build Options:
    --build-dir=DIR                    Place build files in directory [default: ${cmake_build_directory}]
    --build-type=TYPE                  Set build type (Debug,Release,RelWithDebInfo) [default: ${cmake_build_type}]
    --disable-tests                    Do not include unit tests into build.
    --enable-ccache                    Build using the compiler cache cache if in PATH [default: ${cmake_use_ccache}]
    --enable-debug                     Compile debug version (same as --build-type=Debug) [default: off]
    --enable-osx-universal             Build universal x86/arm64 binary on macOS (will need universal deps too)
    --enable-sanitizer[=<names>]       Enable sanitizer(s), default if not further specified is \"address\"
    --enable-static                    Link agent binary staticallly (where supported by platform)
    --enable-werror                    Treat compiler warnings as errors [default: ${cmake_use_werror}]
    --generator=<generator>            CMake generator to use (see cmake --help)
    --prefix=PATH                      Installation prefix [default: ${cmake_install_prefix}]
    --with-openssl=DIR                 Path to OpenSSL installation root

    --display-cmake                    Don't create build configuration, just output final CMake invocation
"
source_dir="$(cd "$(dirname "$0")" && pwd)"

if [ ! -e "$source_dir/3rdparty/doctest/CMakeLists.txt" ] && [ -d "$source_dir/.git" ]; then
    echo "\
You seem to be missing the content of the 3rdparty/doctest directory.

This typically means that you performed a non-recursive git clone of
Spict. To check out the required subdirectories, please execute:

  ( cd $source_dir && git submodule update --recursive --init )
" >&2;
    exit 1;
fi

# Function to append a CMake cache entry definition to the
# cmake_cache_entries variable.
#   $1 is the cache entry variable name
#   $2 is the cache entry variable type
#   $3 is the cache entry variable value
append_cache_entry () {
    if [ "$3" != "" ]; then
        cmake_cache_entries="${cmake_cache_entries} -D $1:$2=$3"
    fi
}

# parse arguments
while [ $# -ne 0 ]; do
    case "$1" in
        -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
        *) optarg= ;;
    esac

    case "$1" in
        --build-dir=*)                     cmake_build_directory="${optarg}";;
        --build-type=*)                    cmake_build_type="${optarg}";;
        --disable-tests)                   cmake_use_doctest="no";;
        --enable-ccache)                   cmake_use_ccache="yes";;
        --enable-debug)                    cmake_build_type="Debug";;
        --enable-osx-universal)            cmake_osx_architectures="'arm64;x86_64'";;
        --enable-sanitizer)                cmake_use_sanitizers="address";;
        --enable-sanitizer=*)              cmake_use_sanitizers="${optarg}";;
        --enable-static)                   cmake_use_static_linking="yes";;
        --enable-werror)                   cmake_use_werror="yes";;
        --generator=*)                     cmake_generator="${optarg}";;
        --prefix=*)                        cmake_install_prefix="${optarg}";;
        --with-openssl=*)                  cmake_openssl_root="${optarg}";;

        --display-cmake) display_cmake=1;;

        --help|-h) echo "${usage}" 1>&2 && exit 1;;
        *) echo "Invalid option '$1'.  Try $0 --help to see available options." && exit 1;;
    esac
    shift
done

# Set CMake cache options.
append_cache_entry CMAKE_BUILD_TYPE             STRING "${cmake_build_type}"
append_cache_entry CMAKE_INSTALL_PREFIX         PATH   "${cmake_install_prefix}"
append_cache_entry CMAKE_OSX_ARCHITECTURES      STRING "${cmake_osx_architectures}"
append_cache_entry USE_CCACHE                   BOOL   "${cmake_use_ccache}"
append_cache_entry USE_SANITIZERS               STRING "${cmake_use_sanitizers}"
append_cache_entry USE_WERROR                   BOOL   "${cmake_use_werror}"
append_cache_entry USE_DOCTEST                  BOOL   "${cmake_use_doctest}"
append_cache_entry USE_STATIC_LINKING           BOOL   "${cmake_use_static_linking}"
append_cache_entry OPENSSL_ROOT_DIR             PATH   "${cmake_openssl_root}"

if [ -n "${cmake_generator}" ]; then
    cmake="${cmake_exe} -G '${cmake_generator}' ${cmake_cache_entries} ${source_dir}"
else
    cmake="${cmake_exe} ${cmake_cache_entries} ${source_dir}"
fi

if [ "${display_cmake}" = 1 ]; then
    echo "${cmake}"
    exit 0
fi

if [ ! -d ${cmake_build_directory} ]; then
    # Create build directory
    mkdir -p ${cmake_build_directory}
else
    # If build directory already exists, remove any pre-existing
    # CMake cache so that this configuration is not tainted by a
    # previous one
    rm -f ${cmake_build_directory}/CMakeCache.txt
fi

cd ${cmake_build_directory}
eval ${cmake} 2>&1 | tee config.log

echo "# This is the command used to configure this build" > config.status
echo ${command} >> config.status
chmod u+x config.status