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

# 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 Options:
    --builddir=DIR         place build files in directory [build]
    --generator=GENERATOR  CMake generator to use (see cmake --help)

  Installation Directories:
    --prefix=PREFIX        installation directory [/usr/local/bro]
    --policydir=PATH       policy file installation directory
                           [PREFIX/share/bro]

  Optional Features:
    --enable-debug         compile in debugging mode
    --enable-brov6         enable IPv6 processing
    --enable-perftools     use Google's perftools
    --enable-cluster       install Broctl configured for cluster operation
                           (overridden by --disable-broctl)
    --disable-broccoli     don't build or install the Broccoli library
    --disable-broctl       don't install Broctl
    --disable-auxtools     don't build or install auxilliary tools

  Required Packages in Non-Standard Locations:
    --with-openssl=PATH    path to OpenSSL install root
    --with-bind=PATH       path to BIND install root
    --with-pcap=PATH       path to libpcap install root
    --with-binpac=PATH     path to BinPAC install root

  Optional Packages in Non-Standard Locations:
    --with-libmagic=PATH   path to libmagic install root
    --with-geoip=PATH      path to the libGeoIP install root
    --with-perftools=PATH  path to Google Perftools install root

  Packaging Options (for developers):
    --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

  Influential Environment Variables (only on first invocation
  per build directory):
    CC                     C compiler command
    CFLAGS                 C compiler flags
    CXX                    C++ compiler command
    CXXFLAGS               C++ compiler flags
"

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
CMakeCacheEntries=""
append_cache_entry CMAKE_INSTALL_PREFIX PATH   /usr/local/bro
append_cache_entry BRO_ROOT_DIR         PATH   /usr/local/bro
append_cache_entry PY_MOD_INSTALL_DIR   PATH   /usr/local/bro/lib/broctl
append_cache_entry POLICYDIR            STRING /usr/local/bro/share/bro
append_cache_entry ENABLE_DEBUG         BOOL   false
append_cache_entry BROv6                BOOL   false
append_cache_entry ENABLE_PERFTOOLS     BOOL   false
append_cache_entry BinPAC_SKIP_INSTALL  BOOL   true
append_cache_entry BUILD_SHARED_LIBS    BOOL   true
append_cache_entry INSTALL_AUX_TOOLS    BOOL   true
append_cache_entry INSTALL_BROCCOLI     BOOL   true
append_cache_entry INSTALL_BROCTL       BOOL   true
append_cache_entry STANDALONE           BOOL   true
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=$optarg
            ;;
        --generator=*)
            CMakeGenerator="$optarg"
            ;;
        --prefix=*)
            append_cache_entry CMAKE_INSTALL_PREFIX PATH   $optarg
            append_cache_entry BRO_ROOT_DIR         PATH   $optarg
            append_cache_entry PY_MOD_INSTALL_DIR   PATH   $optarg/lib/broctl
            if [ "$user_set_policydir" != "true" ]; then
                append_cache_entry POLICYDIR        STRING $optarg/share/bro
            fi
            ;;
        --policydir=*)
            append_cache_entry POLICYDIR            STRING $optarg
            user_set_policydir="true"
            ;;
        --enable-debug)
            append_cache_entry ENABLE_DEBUG         BOOL   true
            ;;
        --enable-brov6)
            append_cache_entry BROv6                BOOL   true
            ;;
        --enable-perftools)
            append_cache_entry ENABLE_PERFTOOLS     BOOL   true
            ;;
        --disable-broccoli)
            append_cache_entry INSTALL_BROCCOLI     BOOL   false
            ;;
        --disable-broctl)
            append_cache_entry INSTALL_BROCTL       BOOL   false
            user_disabled_broctl="true"
            ;;
        --enable-cluster)
            if [ "$user_disabled_broctl" != "true" ]; then
                append_cache_entry STANDALONE       BOOL   false
            fi
            ;;
        --disable-auxtools)
            append_cache_entry INSTALL_AUX_TOOLS    BOOL   false
            ;;
        --with-openssl=*)
            append_cache_entry OpenSSL_ROOT_DIR PATH $optarg
            ;;
        --with-bind=*)
            append_cache_entry BIND_ROOT_DIR PATH $optarg
            ;;
        --with-pcap=*)
            append_cache_entry PCAP_ROOT_DIR PATH $optarg
            ;;
        --with-binpac=*)
            append_cache_entry BinPAC_ROOT_DIR PATH $optarg
            ;;
        --with-libmagic=*)
            append_cache_entry LibMagic_ROOT_DIR PATH $optarg
            ;;
        --with-geoip=*)
            append_cache_entry LibGeoIP_ROOT_DIR PATH $optarg
            ;;
        --with-perftools=*)
            append_cache_entry GooglePerftools_ROOT_DIR PATH $optarg
            ;;
        --ignore-dirs=*)
            append_cache_entry CPACK_SOURCE_IGNORE_FILES STRING $optarg
            ;;
        --pkg-name-prefix=*)
            append_cache_entry PACKAGE_NAME_PREFIX STRING $optarg
            ;;
        *)
            echo "Invalid option '$1'.  Try $0 --help to see available options."
            exit 1
            ;;
    esac
    shift
done

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, then check that it thinks
        # the source tree exists where it's currently located
        cmakehomedir=`grep CMAKE_HOME_DIRECTORY $builddir/CMakeCache.txt | \
                      sed 's/CMAKE_HOME_DIRECTORY:INTERNAL=//g'`
        if [ "$cmakehomedir" != "$sourcedir" ]; then
            # The source tree moved since the build was last configured
            echo "\
The source tree has been moved from:
    $cmakehomedir
to:
    $sourcedir
To reconfigure in the new source directory, please delete:
    $builddir/CMakeCache.txt" >&2
            exit 1
        fi
    fi
else
    # Create build directory
    mkdir -p $builddir
fi

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

if [ -n "$CMakeGenerator" ]; then
    cmake -G "$CMakeGenerator" $CMakeCacheEntries $sourcedir
else
    cmake $CMakeCacheEntries $sourcedir
fi