#!/bin/sh
# Convenience wrapper for easily viewing/setting options that
# the project's CMake scripts will recognize
set -e
command="$0 $*"

# check for `cmake` command
type cmake > /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 Directory:
    --builddir=DIR         place build files in directory [build]

  Installation Directories:
    --prefix=PREFIX        installation directory [/usr/local/zeek]
    --scriptdir=PATH       root installation directory for Zeek scripts
                           [PREFIX/share/zeek]
    --conf-files-dir=DIR   config files installation directory [PREFIX/etc]
    --localstatedir=PATH   path to store log files and run-time data
                           (within log/ and spool/ subdirs) [PREFIX]
    --spooldir=PATH        path to store run-time data [PREFIX/spool]
    --logdir=PATH          path to store log file [PREFIX/logs]
    --libdir=PATH          installation directory for library files [PREFIX/lib]
    --python-home=PATH     installation directory for Python module
                           [PATH/lib/python], the path tracks --prefix if
                           that option is used
    --python-prefix=PATH   versioned installation directory for Python module
                           [PATH/lib/python<Python Version>/site-packages]

  Required Packages in Non-Standard Locations:
    --with-pcap=PATH       path to libpcap install root
    --with-python=PATH     path to Python interpreter
    --with-python-lib=PATH path to libpython
    --with-python-inc=PATH path to Python headers
    --with-swig=PATH       path to SWIG executable

  Packaging Options (for developers):
    --binary-package       toggle special logic for binary packaging
    --ignore-dirs=PATHS    paths to ignore when creating source package
                           (semicolon delimited and quoted when multiple)
    --pkg-name-prefix=NAME use the given name as the package prefix instead
                           of the default CMake project name
    --osx-sysroot=PATH     path to the OS X SDK to compile against
    --osx-min-version=VER  minimum OS X version (the deployment target)

  Required Packages in Non-Standard Locations:
    --with-zeek=PATH        path to Zeek install root
"

sourcedir="$( cd "$( dirname "$0" )" && pwd )"

# Function to append a CMake cache entry definition to the
# CMakeCacheEntries variable
#   $1 is the cache entry variable name
#   $2 is the cache entry variable type
#   $3 is the cache entry variable value
append_cache_entry () {
    CMakeCacheEntries="$CMakeCacheEntries -D $1:$2=$3"
}

# set defaults
builddir=build
prefix=/usr/local/zeek
CMakeCacheEntries=""
append_cache_entry CMAKE_INSTALL_PREFIX PATH $prefix
append_cache_entry ZEEK_SCRIPT_INSTALL_PATH STRING $prefix/share/zeek
append_cache_entry CPACK_SOURCE_IGNORE_FILES STRING

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

    case "$1" in
        --help|-h)
            echo "${usage}" 1>&2
            exit 1
            ;;
        --builddir=*)
            builddir=$optarg
            ;;
        --prefix=*)
            prefix=$optarg
            append_cache_entry CMAKE_INSTALL_PREFIX PATH   $optarg
            append_cache_entry ZEEKCTL_PYTHON_HOME PATH   $optarg
            ;;
        --libdir=*)
            libdir=$optarg
            append_cache_entry CMAKE_INSTALL_LIBDIR PATH   $optarg
             ;;
        --python-home=*)
            append_cache_entry ZEEKCTL_PYTHON_HOME PATH   $optarg
            ;;
        --python-prefix=*)
            append_cache_entry ZEEKCTL_PYTHON_PREFIX PATH   $optarg
            ;;
        --scriptdir=*)
            append_cache_entry ZEEK_SCRIPT_INSTALL_PATH STRING $optarg
            user_set_scriptdir="true"
            ;;
        --conf-files-dir=*)
            append_cache_entry ZEEK_ETC_INSTALL_DIR  PATH   $optarg
            user_set_conffilesdir="true"
            ;;
        --localstatedir=*)
            append_cache_entry ZEEK_LOCAL_STATE_DIR  PATH   $optarg
            ;;
        --spooldir=*)
            append_cache_entry ZEEK_SPOOL_DIR  PATH   $optarg
            ;;
        --logdir=*)
            append_cache_entry ZEEK_LOG_DIR  PATH   $optarg
            ;;
        --with-zeek=*)
            append_cache_entry ZEEK_ROOT_DIR PATH $optarg
            ;;
        --with-pcap=*)
            append_cache_entry PCAP_ROOT_DIR    PATH    $optarg
            ;;
        --with-python=*)
            append_cache_entry Python_EXECUTABLE    PATH    $optarg
            ;;
        --with-python-lib=*)
            append_cache_entry PYTHON_LIBRARY       PATH    $optarg
            ;;
        --with-python-inc=*)
            append_cache_entry PYTHON_INCLUDE_DIR   PATH    $optarg
            append_cache_entry PYTHON_INCLUDE_PATH  PATH    $optarg
            ;;
        --with-swig=*)
            append_cache_entry SWIG_EXECUTABLE      PATH    $optarg
            ;;
        --binary-package)
            append_cache_entry BINARY_PACKAGING_MODE BOOL true
            ;;
        --ignore-dirs=*)
            append_cache_entry CPACK_SOURCE_IGNORE_FILES STRING $optarg
            ;;
        --pkg-name-prefix=*)
            append_cache_entry PACKAGE_NAME_PREFIX STRING $optarg
            ;;
        --osx-sysroot=*)
            append_cache_entry CMAKE_OSX_SYSROOT PATH $optarg
            ;;
        --osx-min-version=*)
            append_cache_entry CMAKE_OSX_DEPLOYMENT_TARGET STRING $optarg
            ;;
        *)
            echo "Invalid option '$1'.  Try $0 --help to see available options."
            exit 1
            ;;
    esac
    shift
done

if [ "$user_set_scriptdir" != "true" ]; then
    append_cache_entry ZEEK_SCRIPT_INSTALL_PATH STRING $prefix/share/zeek
fi

if [ "$user_set_conffilesdir" != "true" ]; then
    append_cache_entry ZEEK_ETC_INSTALL_DIR PATH $prefix/etc
fi

if [ -d $builddir ]; then
    # If build directory exists, check if it has a CMake cache
    if [ -f $builddir/CMakeCache.txt ]; then
        # If the CMake cache exists, delete it so that this configuration
        # is not tainted by a previous one
        rm -f $builddir/CMakeCache.txt
    fi
else
    # Create build directory
    mkdir -p $builddir
fi

echo "Build Directory : $builddir"
echo "Source Directory: $sourcedir"
cd $builddir
cmake $CMakeCacheEntries $sourcedir

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