#! /bin/bash
# Copyright (C) 2008-2009 Google. All Rights Reserved.
#
# Amit Singh <singh@>
# Repurposes code from several earlier scripts by Ted Bonkenburg.
#

PATH=/Developer/usr/sbin:/Developer/usr/bin:/Developer/Tools:/Developer/Applications:/sbin:/usr/sbin:/bin:/usr/bin

export PATH

# Configurables
#
# Beware: GNU libtool cannot handle directory names containing whitespace.
#         Therefore, do not set M_CONF_TMPDIR to such a directory.
#
readonly M_CONF_TMPDIR=/tmp
readonly M_CONF_PRIVKEY=/etc/macfuse/private.der

# Other constants
#
readonly M_PROGDESC="MacFUSE build tool"
readonly M_PROGNAME=macfuse_buildtool
readonly M_PROGVERS=1.0

readonly M_DEFAULT_VALUE=__default__

readonly M_CONFIGURATIONS="Debug Release" # default is Release
readonly M_PLATFORMS="10.5 10.6"          # default is native
readonly M_PLATFORMS_REALISTIC="10.5"
readonly M_TARGETS="clean dist examples lib libsrc reload smalldist swconfigure"
readonly M_TARGETS_WITH_PLATFORM="examples lib libsrc smalldist swconfigure"

readonly M_DEFAULT_PLATFORM="$M_DEFAULT_VALUE"
readonly M_DEFAULT_TARGET="$M_DEFAULT_VALUE"

readonly M_XCODE_VERSION_REQUIRED=3.1.1

# Globals
#
declare m_args=
declare m_active_target=""
declare m_configuration=Release
declare m_developer=0
declare m_osname=""
declare m_platform="$M_DEFAULT_PLATFORM"
declare m_release=""
declare m_shortcircuit=0
declare m_srcroot=""
declare m_srcroot_platformdir=""
declare m_stderr=/dev/stderr
declare m_stdout=/dev/stdout
declare m_suprompt=" invalid "
declare m_target="$M_DEFAULT_TARGET"
declare m_usdk_dir=""
declare m_version_tiger=""
declare m_version_leopard=""
declare m_version_snowleopard=""
declare m_xcode_version=

# Other implementation details
#
readonly M_FSBUNDLE_NAME=fusefs.fs
readonly M_INSTALL_RESOURCES_DIR=Install_resources
readonly M_KEXT_ID=com.google.filesystems.fusefs
readonly M_KEXT_NAME=fusefs.kext
readonly M_KEXT_SYMBOLS=fusefs-symbols
readonly M_LIBFUSE_SRC=fuse-current.tar.gz
readonly M_LIBFUSE_PATCH=fuse-current-macosx.patch
readonly M_LOGPREFIX=MacFUSEBuildTool
readonly M_MACFUSE_PRODUCT_ID=com.google.filesystems.fusefs
readonly M_PKGNAME_CORE="MacFUSE Core.pkg"
readonly M_PKGNAME=MacFUSE.pkg
readonly M_WANTSU="needs the Administrator password"
readonly M_WARNING="*** Warning"

function m_help()
{
    cat <<__END_HELP_CONTENT
$M_PROGDESC version $M_PROGVERS
Copyright (C) 2008 Google. All Rights Reserved.
Usage:
  $M_PROGNAME [-dhqsv] [-c configuration] [-p platform] -t target

  * configuration is one of: $M_CONFIGURATIONS (default is $m_configuration)
  * platform is one of: $M_PLATFORMS (default is the host's platform)
  * target is one of: $M_TARGETS
  * platforms can only be specified for: $M_TARGETS_WITH_PLATFORM

The target keywords mean the following:
    clean       clean all targets
    dist        create a multiplatform distribution package
    examples    build example file systems (e.g. fusexmp_fh and hello)
    lib         build the user-space library (e.g. to run fusexmp_fh)
    libsrc      unpack and patch the user-space library source
    reload      rebuild and reload the kernel extension
    smalldist   create a platform-specific distribution package
    swconfigure configure software (e.g. sshfs) for compilation

Other options are:
    -d  create a developer prerelease package instead of a regular release
    -q  enable quiet mode (suppresses verbose build output)
    -s  enable shortcircuit mode (useful for testing the build mechanism itself)
    -v  report version numbers and quit
__END_HELP_CONTENT

    return 0
}

# m_version()
#
function m_version
{
    echo "$M_PROGDESC version $M_PROGVERS"

    m_set_platform
    m_set_srcroot "$m_platform"

    local mv_platform_dirs=`ls -d "$m_srcroot"/core/10.*`
    for i in $mv_platform_dirs
    do
        local mv_release=`awk '/#define[ \t]*MACFUSE_VERSION_LITERAL/ {print $NF}' "$i/fusefs/common/fuse_version.h"`
        if [ ! -z "$mv_release" ]
        then
            echo "Platform source '$i': MacFUSE version $mv_release"
        fi
    done

    return 0
}

# m_log(msg)
#
function m_log()
{
    printf "%-30s: %s\n" "$M_LOGPREFIX($m_active_target)" "$*"
}

# m_warn(msg)
#
function m_warn()
{
    echo "$M_WARNING: $*"
}

# m_exit_on_error(errmsg)
#
function m_exit_on_error()
{
    if [ "$?" != 0 ]
    then
        local retval=$?
        echo "$M_LOGPREFIX($m_active_target) failed: $1" 1>&2
        exit $retval
    fi

    # NOTREACHED
}

# m_set_suprompt(msg)
#
function m_set_suprompt()
{
    m_suprompt="$M_LOGPREFIX($m_active_target) $M_WANTSU $*: "
}

# m_set_srcroot([platform])
#
function m_set_srcroot()
{
    local macfuse_dir=""
    local is_absolute_path=`echo "$0" | cut -c1`
    if [ "$is_absolute_path" == "/" ]
    then
        macfuse_dir="`dirname $0`/"
    else
        macfuse_dir="`pwd`/`dirname $0`/"
    fi
    pushd . > /dev/null
    cd "$macfuse_dir" || exit 1
    macfuse_dir=`pwd`
    popd > /dev/null

    m_srcroot="$macfuse_dir"
    return 0
}

# m_set_platform()
#
function m_set_platform()
{
    local retval=0

    if [ "$m_platform" == "$M_DEFAULT_PLATFORM" ]
    then
       m_platform=`sw_vers -productVersion | cut -d . -f 1,2`
    fi

    # XXX For now
    if [ "$m_platform" == "10.6" ]
    then
        m_platform="10.5"
    fi

    case "$m_platform" in
    10.5*)
        m_osname="Leopard"
        m_usdk_dir="/Developer/SDKs/MacOSX10.5.sdk"
    ;;
    10.6*)
        m_osname="Snow Leopard"
        m_usdk_dir="/Developer/SDKs/MacOSX10.6.sdk"
    ;;
    *)
        m_osname="Unknown"
        m_usdk_dir=""
        retval=1
    ;;
    esac

    return $retval
}

# m_build_pkg(pkgversion, install_srcroot, install_payload, pkgname, output_dir)
#
function m_build_pkg()
{
    local bp_pkgversion=$1
    local bp_install_srcroot=$2
    local bp_install_payload=$3
    local bp_pkgname=$4
    local bp_output_dir=$5

    local bp_infoplist_in="$bp_install_srcroot/Info.plist.in"
    local bp_infoplist_out="$bp_output_dir/Info.plist"
    local bp_descriptionplist="$bp_install_srcroot/Description.plist"

    # Fix up the Info.plist
    #
    sed -e "s/MACFUSE_VERSION_LITERAL/$bp_pkgversion/g" \
        < "$bp_infoplist_in" > "$bp_infoplist_out"
    m_exit_on_error "cannot finalize Info.plist for package '$bp_pkgname'."

    # Get rid of .svn files from M_INSTALL_RESOURCES_DIR
    #
    (tar -C "$bp_install_srcroot" --exclude '.svn' -cpvf - \
        "$M_INSTALL_RESOURCES_DIR" | tar -C "$bp_output_dir/" \
            -xpvf - >$m_stdout 2>$m_stderr)>$m_stdout 2>$m_stderr
    m_exit_on_error "cannot migrate resources from '$M_INSTALL_RESOURCES_DIR'."

    # Make the package
    m_set_suprompt "to run packagemaker"
    sudo -p "$m_suprompt" \
        packagemaker -build -p "$bp_output_dir/$bp_pkgname"    \
          -f "$bp_install_payload" -b "$M_CONF_TMPDIR" -ds -v  \
          -r "$bp_output_dir/$M_INSTALL_RESOURCES_DIR" -i "$bp_infoplist_out" \
          -d "$bp_descriptionplist" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot create package '$bp_pkgname'."

    return 0
}

# Prepare the user-space library source
#
function m_handler_libsrc()
{
    m_active_target="libsrc"

    m_set_platform

    m_set_srcroot "$m_platform"

    local lib_dir="$m_srcroot"/core/"$m_platform"/libfuse
    if [ ! -d "$lib_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$lib_dir'."
    fi

    local kernel_dir="$m_srcroot"/core/"$m_platform"/fusefs
    if [ ! -d "$kernel_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$kernel_dir'."
    fi

    local package_dir=`tar -tzvf "$lib_dir/$M_LIBFUSE_SRC" | head -1 | awk '{print $NF}'`
    if [ "x$package_dir" == "x" ]
    then
        false
        m_exit_on_error "cannot determine MacFUSE library version."
    fi

    local package_name=`basename "$package_dir"`

    if [ "x$package_name" == "x" ]
    then
        false
        m_exit_on_error "cannot determine MacFUSE library version."
    fi

    rm -rf "$M_CONF_TMPDIR/$package_name"

    if [ "$1" == "clean" ]
    then
        local retval=$?
        m_log "cleaned (platform $m_platform)"
        return $retval
    fi

    m_log "initiating Universal build for $m_platform"

    tar -C "$M_CONF_TMPDIR" -xzvf "$lib_dir/$M_LIBFUSE_SRC" \
        >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot untar MacFUSE library source from '$M_LIBFUSE_SRC'."

    cd "$M_CONF_TMPDIR/$package_name"
    m_exit_on_error "cannot access MacFUSE library source in '$M_CONF_TMPDIR/$package_name'."

    m_log "preparing library source"
    patch -p1 < "$lib_dir/$M_LIBFUSE_PATCH" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot patch MacFUSE library source."

    echo >$m_stdout
    m_log "succeeded, results in '$M_CONF_TMPDIR/$package_name'."
    echo >$m_stdout

    return 0
}

# Build the user-space library
#
function m_handler_lib()
{
    m_active_target="lib"

    m_set_platform

    m_set_srcroot "$m_platform"

    local lib_dir="$m_srcroot"/core/"$m_platform"/libfuse
    if [ ! -d "$lib_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$lib_dir'."
    fi

    local kernel_dir="$m_srcroot"/core/"$m_platform"/fusefs
    if [ ! -d "$kernel_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$kernel_dir'."
    fi

    local package_dir=`tar -tzvf "$lib_dir/$M_LIBFUSE_SRC" | head -1 | awk '{print $NF}'`
    if [ "x$package_dir" == "x" ]
    then
        false
        m_exit_on_error "cannot determine MacFUSE library version."
    fi

    local package_name=`basename "$package_dir"`

    if [ "x$package_name" == "x" ]
    then
        false
        m_exit_on_error "cannot determine MacFUSE library version."
    fi

    rm -rf "$M_CONF_TMPDIR/$package_name"

    if [ "$1" == "clean" ]
    then
        local retval=$?
        m_log "cleaned (platform $m_platform)"
        return $retval
    fi

    m_log "initiating Universal build for $m_platform"

    tar -C "$M_CONF_TMPDIR" -xzvf "$lib_dir/$M_LIBFUSE_SRC" \
        >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot untar MacFUSE library source from '$M_LIBFUSE_SRC'."

    cd "$M_CONF_TMPDIR/$package_name"
    m_exit_on_error "cannot access MacFUSE library source in '$M_CONF_TMPDIR/$package_name'."

    m_log "preparing library source"
    patch -p1 < "$lib_dir/$M_LIBFUSE_PATCH" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot patch MacFUSE library source."

    m_log "configuring library source"
    /bin/sh ./darwin_configure.sh "$kernel_dir" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot configure MacFUSE library source for compilation."

    m_log "running make"
    make -j2 >$m_stdout 2>$m_stderr
    m_exit_on_error "make failed while compiling the MacFUSE library."

    echo >$m_stdout
    m_log "succeeded, results in '$M_CONF_TMPDIR/$package_name'."
    echo >$m_stdout

    return 0
}

# Rebuild and reload the kernel extension
#
function m_handler_reload()
{
    m_active_target="reload"

    # Argument validation would have ensured that we use native platform
    # for this target.

    m_set_platform

    m_set_srcroot "$m_platform"

    local kernel_dir="$m_srcroot/core/$m_platform/fusefs"
    if [ ! -d "$kernel_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$kernel_dir'."
    fi

    if [ -e "$M_CONF_TMPDIR/$M_KEXT_NAME" ]
    then
        m_set_suprompt "to remove old MacFUSE kext"
        sudo -p "$m_suprompt" rm -rf "$M_CONF_TMPDIR/$M_KEXT_NAME"
        m_exit_on_error "cannot remove old copy of MacFUSE kext."
    fi

    if [ -e "$M_CONF_TMPDIR/$M_KEXT_SYMBOLS" ]
    then
        m_set_suprompt "to remove old copy of MacFUSE kext symbols"
        sudo -p "$m_suprompt" rm -rf "$M_CONF_TMPDIR/$M_KEXT_SYMBOLS"
        m_exit_on_error "cannot remove old copy of MacFUSE kext symbols."
    fi

    if [ "$1" == "clean" ]
    then
        rm -rf "$kernel_dir/build/"
        local retval=$? 
        m_log "cleaned (platform $m_platform)"
        return $retval
    fi

    m_log "initiating kernel extension rebuild/reload for $m_platform"

    kextstat -l -b "$M_KEXT_ID" | grep "$M_KEXT_ID" >/dev/null 2>/dev/null
    if [ "$?" == "0" ]
    then
        m_log "unloading kernel extension"
        m_set_suprompt "to unload MacFUSE kext"
        sudo -p "$m_suprompt" \
            kextunload -v -b "$M_KEXT_ID" >$m_stdout 2>$m_stderr
        m_exit_on_error "cannot unload kext '$M_KEXT_ID'."
    fi

    cd "$kernel_dir"
    m_exit_on_error "failed to access the kext source directory '$kernel_dir'."

    m_log "rebuilding kext"

    xcodebuild -configuration Debug -target fusefs >$m_stdout 2>$m_stderr
    m_exit_on_error "xcodebuild cannot build configuration Debug for target fusefs."
 
    mkdir "$M_CONF_TMPDIR/$M_KEXT_SYMBOLS"
    m_exit_on_error "cannot create directory for MacFUSE kext symbols."

    cp -R "$kernel_dir/build/Debug/$M_KEXT_NAME" "$M_CONF_TMPDIR/$M_KEXT_NAME"
    m_exit_on_error "cannot copy newly built MacFUSE kext."

    m_set_suprompt "to set permissions on newly built MacFUSE kext"
    sudo -p "$m_suprompt" chown -R root:wheel "$M_CONF_TMPDIR/$M_KEXT_NAME"
    m_exit_on_error "cannot set permissions on newly built MacFUSE kext."

    m_log "reloading kext"

    m_set_suprompt "to load newly built MacFUSE kext"
    sudo -p "$m_suprompt" \
        kextload -s "$M_CONF_TMPDIR/$M_KEXT_SYMBOLS" \
            -v "$M_CONF_TMPDIR/$M_KEXT_NAME" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot load newly built MacFUSE kext."

    echo >$m_stdout
    m_log "checking status of kernel extension"
    kextstat -l -b "$M_KEXT_ID"
    echo >$m_stdout

    echo >$m_stdout
    m_log "succeeded, results in '$M_CONF_TMPDIR'."
    echo >$m_stdout

    return 0
}

# Build examples from the user-space MacFUSE library
#
function m_handler_examples()
{
    m_active_target="examples"

    m_set_platform

    m_set_srcroot "$m_platform"

    local lib_dir="$m_srcroot"/core/"$m_platform"/libfuse
    if [ ! -d "$lib_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$lib_dir'."
    fi

    local kernel_dir="$m_srcroot"/core/"$m_platform"/fusefs
    if [ ! -d "$kernel_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$kernel_dir'."
    fi

    local package_dir=`tar -tzvf "$lib_dir/$M_LIBFUSE_SRC" | head -1 | awk '{print $NF}'`
    if [ "x$package_dir" == "x" ]
    then
        false
        m_exit_on_error "cannot determine MacFUSE library version."
    fi

    local package_name=`basename "$package_dir"`

    if [ "x$package_name" == "x" ]
    then
        false
        m_exit_on_error "cannot determine MacFUSE library version."
    fi

    rm -rf "$M_CONF_TMPDIR/$package_name"

    if [ "$1" == "clean" ]
    then
        local retval=$?
        m_log "cleaned (platform $m_platform)"
        return $retval
    fi

    m_log "initiating Universal build for $m_platform"

    tar -C "$M_CONF_TMPDIR" -xzvf "$lib_dir/$M_LIBFUSE_SRC" \
        >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot untar MacFUSE library source from '$M_LIBFUSE_SRC'."

    cd "$M_CONF_TMPDIR/$package_name"
    m_exit_on_error "cannot access MacFUSE library source in '$M_CONF_TMPDIR/$package_name'."

    m_log "preparing library source"
    patch -p1 < "$lib_dir/$M_LIBFUSE_PATCH" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot patch MacFUSE library source."

    m_log "configuring library source"
    /bin/sh ./darwin_configure_ino64.sh "$kernel_dir" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot configure MacFUSE library source for compilation."

    cd example
    m_exit_on_error "cannot access examples source."

    local me_installed_lib="/usr/local/lib/libfuse_ino64.la"

    perl -pi -e "s#../lib/libfuse.la#$me_installed_lib#g" Makefile
    m_exit_on_error "failed to prepare example source for build."

    m_log "running make"
    make -j2 >$m_stdout 2>$m_stderr
    m_exit_on_error "make failed while compiling the MacFUSE examples."

    echo >$m_stdout
    m_log "succeeded, results in '$M_CONF_TMPDIR/$package_name/example'."
    echo >$m_stdout

    return 0
}

# Build a multiplatform distribution package
#
function m_handler_dist()
{
    m_active_target="dist"

    if [ "$1" == "clean" ]
    then
        for m_p in $M_PLATFORMS_REALISTIC
        do
            m_platform="$m_p"
            m_handler_smalldist clean
        done

        m_active_target="dist"

        m_set_platform

        m_set_srcroot "$m_platform"

        rm -rf "$m_srcroot/core/autoinstaller/build"
        m_log "cleaned internal subtarget autoinstaller"

        rm -rf "$m_srcroot/core/prefpane/build"
        m_log "cleaned internal subtarget prefpane"

        m_release=`awk '/#define[ \t]*MACFUSE_VERSION_LITERAL/ {print $NF}' "$m_srcroot/core/$m_platform/fusefs/common/fuse_version.h" | cut -d . -f 1,2`
        if [ ! -z "$m_release" ]
        then
            if [ -e "$M_CONF_TMPDIR/macfuse-$m_release" ]
            then
                m_set_suprompt "to remove previous output packages"
                sudo -p "$m_suprompt" rm -rf "$M_CONF_TMPDIR/macfuse-$m_release"
                m_log "cleaned any previous output packages in '$M_CONF_TMPDIR'"
            fi
        fi

        return 0
    fi

    m_log "initiating Universal build of MacFUSE"

    m_set_platform
    m_set_srcroot "$m_platform"

    m_log "configuration is '$m_configuration'"
    if [ "$m_developer" == "0" ]
    then
        m_log "packaging flavor is 'Mainstream'"
    else
        m_log "packaging flavor is 'Developer Prerelease'"
    fi

    m_log "locating MacFUSE private key"
    if [ ! -f "$M_CONF_PRIVKEY" ]
    then
        false
        m_exit_on_error "cannot find MacFUSE private key in '$M_CONF_PRIVKEY'."
    fi

    # Autoinstaller
    #

    local md_ai_builddir="$m_srcroot/core/autoinstaller/build"

    if [ "$m_shortcircuit" != "1" ]
    then
        rm -rf "$md_ai_builddir"
        # ignore any errors
    fi

    m_log "building the MacFUSE autoinstaller"

    pushd "$m_srcroot/core/autoinstaller" >/dev/null 2>/dev/null
    m_exit_on_error "cannot access the autoinstaller source."
    xcodebuild -configuration "$m_configuration" -target "Build All" \
        >$m_stdout 2>$m_stderr
    m_exit_on_error "xcodebuild cannot build configuration $m_configuration for subtarget autoinstaller."
    popd >/dev/null 2>/dev/null

    local md_ai="$md_ai_builddir/$m_configuration/autoinstall-macfuse-core"
    if [ ! -x "$md_ai" ]
    then
        false
        m_exit_on_error "cannot find autoinstaller '$md_ai'."
    fi
    local md_plistsigner="$md_ai_builddir/$m_configuration/plist_signer"
    if [ ! -x "$md_plistsigner" ]
    then
        false
        m_exit_on_error "cannot find plist signer '$md_plistsigner'."
    fi

    # Create platform-Specific MacFUSE subpackages
    #
    for m_p in $M_PLATFORMS_REALISTIC
    do
        pushd . >/dev/null 2>/dev/null
        m_active_target="dist"
        m_platform="$m_p"
        m_log "building platform $m_platform"
        m_handler_smalldist
        popd >/dev/null 2>/dev/null
    done

    # Build the preference pane
    #
    local md_pp_builddir="$m_srcroot/core/prefpane/build"

    if [ "$m_shortcircuit" != "1" ]
    then
        rm -rf "$md_pp_builddir"
        # ignore any errors
    fi

    m_log "building the MacFUSE prefpane"

    pushd "$m_srcroot/core/prefpane" >/dev/null 2>/dev/null
    m_exit_on_error "cannot access the prefpane source."
    xcodebuild -configuration "$m_configuration" -target "MacFUSE" \
        >$m_stdout 2>$m_stderr
    m_exit_on_error "xcodebuild cannot build configuration $m_configuration for subtarget prefpane."
    popd >/dev/null 2>/dev/null

    local md_pp="$md_pp_builddir/$m_configuration/MacFUSE.prefPane"
    if [ ! -d "$md_pp" ]
    then
        false
        m_exit_on_error "cannot find preference pane."
    fi

    cp "$md_ai" "$md_pp/Contents/MacOS"
    m_exit_on_error "cannot copy the autoinstaller to the prefpane bundle."

    # Build the container
    #

    m_active_target="dist"

    m_release=`awk '/#define[ \t]*MACFUSE_VERSION_LITERAL/ {print $NF}' "$m_srcroot/core/$m_platform/fusefs/common/fuse_version.h" | cut -d . -f 1,2`
    m_exit_on_error "cannot get MacFUSE release version."

    local md_macfuse_out="$M_CONF_TMPDIR/macfuse-$m_release"
    local md_macfuse_root="$md_macfuse_out/pkgroot/"

    if [ -e "$md_macfuse_out" ]
    then
        m_set_suprompt "to remove a previously built container package"
        sudo -p "$m_suprompt" rm -rf "$md_macfuse_out"
        # ignore any errors
    fi

    m_log "initiating distribution build"

    local md_platforms=""
    local md_platform_dirs=`ls -d "$M_CONF_TMPDIR"/macfuse-core-*${m_release}.* | paste -s -`
    m_log "found payloads $md_platform_dirs"
    for i in $md_platform_dirs
    do
        local md_tmp_versions=${i#*core-}
        local md_tmp_release_version=${md_tmp_versions#*-}
        local md_tmp_os_version=${md_tmp_versions%-*}

        md_platforms="${md_platforms},${md_tmp_os_version}=${i}/$M_PKGNAME_CORE"

        case "$md_tmp_os_version" in
        10.5)
            m_version_leopard=$md_tmp_release_version
        ;;
        10.6)
            m_version_snowleopard=$md_tmp_release_version
        ;;
        esac

        m_log "adding [ '$md_tmp_os_version', '$md_tmp_release_version' ]"
    done

    m_log "building '$M_PKGNAME'"

    mkdir "$md_macfuse_out"
    m_exit_on_error "cannot create directory '$md_macfuse_out'."

    mkdir "$md_macfuse_root"
    m_exit_on_error "cannot create directory '$md_macfuse_root'."

    m_log "copying generic container package payload"
    mkdir -p "$md_macfuse_root/Library/PreferencePanes"
    m_exit_on_error "cannot make directory '$md_macfuse_root/Library/PreferencePanes'."
    cp -R "$md_pp" "$md_macfuse_root/Library/PreferencePanes/"
    m_exit_on_error "cannot copy the prefpane to '$md_macfuse_root/Library/PreferencePanes/'."
    m_set_suprompt "to chown '$md_macfuse_root/'."
    sudo -p "$m_suprompt" chown -R root:wheel "$md_macfuse_root/"

    local md_srcroot="$m_srcroot/core/packaging/macfuse"
    local md_infoplist_in="$md_srcroot/Info.plist.in"
    local md_infoplist_out="$md_macfuse_out/Info.plist"
    local md_descriptionplist="$md_srcroot/Description.plist"
    local md_install_resources="$md_macfuse_out/$M_INSTALL_RESOURCES_DIR"

    # Get rid of .svn files from M_INSTALL_RESOURCES_DIR
    #
    (tar -C "$md_srcroot" --exclude '.svn' -cpvf - \
        "$M_INSTALL_RESOURCES_DIR" | tar -C "$md_macfuse_out" -xpvf - \
            >$m_stdout 2>$m_stderr)>$m_stdout 2>$m_stderr

    # Copy subpackage platform directories under Resources
    #

    local md_pkg_size=0
    local md_saved_ifs="$IFS"
    IFS=","
    for i in $md_platforms
    do
        if [ x"$i" == x"" ]
        then
            continue;  # Skip empty/bogus comma-item
        fi

        local md_tmp_os_version=${i%%=*}
        local md_tmp_core_pkg=${i##*=}
        local md_tmp_core_pkg_dir=$(dirname "$md_tmp_core_pkg")
        local md_tmp_core_pkg_name=$(basename "$md_tmp_core_pkg")
        local md_tmp_pkg_dst="$md_install_resources/$md_tmp_os_version"

        local md_tmp_new_size=$(defaults read "$md_tmp_core_pkg/Contents/Info" IFPkgFlagInstalledSize)
        if [ -z "$md_tmp_new_size" ]
        then
            m_warn "unable to read package size from '$md_tmp_core_pkg'."
        fi
        if [ $md_tmp_new_size -gt $md_pkg_size ]
        then
            md_pkg_size=$md_tmp_new_size
        fi

        mkdir "$md_tmp_pkg_dst"
        m_exit_on_error "cannot make package subdirectory '$md_tmp_pkg_dst'."

        m_set_suprompt "to add platform-specific package to container"
        (sudo -p "$m_suprompt" tar -C "$md_tmp_core_pkg_dir" -cpvf - "$md_tmp_core_pkg_name" | sudo -p "$m_suprompt" tar -C "$md_tmp_pkg_dst" -xpvf - >$m_stdout 2>$m_stderr)>$m_stdout 2>$m_stderr
        m_exit_on_error "cannot add package."
    done
    IFS="$md_saved_ifs"

    # XXX For now, make 10.5 also valid for 10.6
    #
    if [ -d "$md_install_resources/10.5" ]
    then
        ln -s "10.5" "$md_install_resources/10.6"
    fi

    # Throw in the autoinstaller
    #
    cp "$md_ai" "$md_install_resources"
    m_exit_on_error "cannot copy '$md_ai' to '$md_install_resources'."

    # Fix up the container's Info.plist
    #
    sed -e "s/MACFUSE_PKG_VERSION_LITERAL/$m_release/g"  \
        -e "s/MACFUSE_PKG_INSTALLED_SIZE/$md_pkg_size/g" \
            < "$md_infoplist_in" > "$md_infoplist_out"
    m_exit_on_error "cannot fix the Info.plist of the container package."

    # Create the big package
    #
    m_set_suprompt "to run packagemaker for the container package"
    sudo -p "$m_suprompt" \
        packagemaker -build -p "$md_macfuse_out/$M_PKGNAME" \
          -f "$md_macfuse_root" -b "$M_CONF_TMPDIR" -ds -v  \
          -r "$md_install_resources" -i "$md_infoplist_out" \
          -d "$md_descriptionplist" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot create container package '$M_PKGNAME'."

    # Create the distribution volume
    #
    local md_volume_name="MacFUSE $m_release"
    local md_scratch_dmg="$md_macfuse_out/macfuse-scratch.dmg"
    hdiutil create -layout NONE -megabytes 10 -fs HFS+ \
        -volname "$md_volume_name" "$md_scratch_dmg" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot create scratch MacFUSE disk image."

    # Attach/mount the volume
    #
    hdiutil attach -private -nobrowse "$md_scratch_dmg" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot attach scratch MacFUSE disk image."

    # Create the .engine_install file
    #
    local md_volume_path="/Volumes/$md_volume_name"
    local md_engine_install="$md_volume_path/.engine_install"
cat > "$md_engine_install" <<__END_ENGINE_INSTALL
#!/bin/sh -p
/usr/sbin/installer -pkg "\$1/$M_PKGNAME" -target /
__END_ENGINE_INSTALL

    chmod +x "$md_engine_install"
    m_exit_on_error "cannot set permissions on autoinstaller engine file."

    # For backward compatibility, we need a .keystone_install too
    #
    ln -s ".engine_install" "$md_volume_path/.keystone_install"
    # ignore any errors

    # Copy over the package
    #
    cp -pRX "$md_macfuse_out/$M_PKGNAME" "$md_volume_path"
    if [ $? -ne 0 ]
    then
        hdiutil detach "$md_volume_path" >$m_stdout 2>$m_stderr
        false
        m_exit_on_error "cannot copy '$M_PKGNAME' to scratch disk image."
    fi

    # Set the custom icon
    #
    cp -pRX "$md_install_resources/.VolumeIcon.icns" \
        "$md_volume_path/.VolumeIcon.icns"
    m_exit_on_error "cannot copy custom volume icon to scratch disk image."

    /Developer/Tools/SetFile -a C "$md_volume_path"
    m_exit_on_error "cannot set custom volume icon on scratch disk image."

    # Copy over the license file
    #
    cp "$md_install_resources/License.rtf" "$md_volume_path/License.rtf"
    m_exit_on_error "cannot copy MacFUSE license to scratch disk image."

    # Copy over the CHANGELOG.txt file
    #
    cp "$m_srcroot/CHANGELOG.txt" "$md_volume_path/CHANGELOG.txt"
    m_exit_on_error "cannot copy MacFUSE CHANGELOG to scratch disk image."

    # Detach the volume.
    hdiutil detach "$md_volume_path" >$m_stdout 2>$m_stderr
    if [ $? -ne 0 ]
    then
        false
        m_exit_on_error "cannot detach volume '$md_volume_path'."
    fi

    # Convert to a read-only compressed dmg
    #
    local md_dmg_name="MacFUSE-$m_release.dmg"
    local md_dmg_path="$md_macfuse_out/$md_dmg_name"
    hdiutil convert -imagekey zlib-level=9 -format UDZO "$md_scratch_dmg" \
        -o "$md_dmg_path" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot finalize MacFUSE distribution disk image."

    rm -f "$md_scratch_dmg"
    # ignore any errors

    m_log "creating autoinstaller rules"

    # Make autoinstaller rules file
    #
    local md_dmg_hash=$(openssl sha1 -binary "$md_dmg_path" | openssl base64)
    local md_dmg_size=$(stat -f%z "$md_dmg_path")

    local md_rules_plist="$md_macfuse_out/DeveloperRelease.plist"
    local md_download_url="http://macfuse.googlecode.com/svn/releases/developer/$md_dmg_name"
    if [ "$m_developer" == "0" ]
    then
        md_rules_plist="$md_macfuse_out/CurrentRelease.plist"
        md_download_url="http://macfuse.googlecode.com/svn/releases/$md_dmg_name"
    fi

cat > "$md_rules_plist" <<__END_RULES_PLIST
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "https://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>Rules</key>
  <array>
    <dict>
      <key>ProductID</key>
      <string>$M_MACFUSE_PRODUCT_ID</string>
      <key>Predicate</key>
      <string>SystemVersion.ProductVersion beginswith "10.6" AND Ticket.version != "$m_version_leopard"</string>
      <key>Version</key>
      <string>$m_version_leopard</string>
      <key>Codebase</key>
      <string>$md_download_url</string>
      <key>Hash</key>
      <string>$md_dmg_hash</string>
      <key>Size</key>
      <string>$md_dmg_size</string>
    </dict>
    <dict>
      <key>ProductID</key>
      <string>$M_MACFUSE_PRODUCT_ID</string>
      <key>Predicate</key>
      <string>SystemVersion.ProductVersion beginswith "10.5" AND Ticket.version != "$m_version_leopard"</string>
      <key>Version</key>
      <string>$m_version_leopard</string>
      <key>Codebase</key>
      <string>$md_download_url</string>
      <key>Hash</key>
      <string>$md_dmg_hash</string>
      <key>Size</key>
      <string>$md_dmg_size</string>
    </dict>
  </array>
</dict>
</plist>
__END_RULES_PLIST

    # Sign the output rules
    #
  
    m_log "signing autoinstaller rules"

    m_set_suprompt "to sign the rules file"
    sudo -p "$m_suprompt" \
        "$md_plistsigner" --sign --key "$M_CONF_PRIVKEY" \
            "$md_rules_plist" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot sign the rules file '$md_rules_plist' with key '$M_CONF_PRIVKEY'."

    echo >$m_stdout
    m_log "succeeded, results in '$md_macfuse_out'."
    echo >$m_stdout

    return 0
}


# Build a platform-specific distribution package
#
function m_handler_smalldist()
{
    m_active_target="smalldist"

    m_set_platform

    m_set_srcroot "$m_platform"

    local lib_dir="$m_srcroot"/core/"$m_platform"/libfuse
    if [ ! -d "$lib_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$lib_dir'."
    fi

    local kernel_dir="$m_srcroot"/core/"$m_platform"/fusefs
    if [ ! -d "$kernel_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$kernel_dir'."
    fi

    if [ "$m_shortcircuit" != "1" ]
    then
        rm -rf "$kernel_dir/build/"
        rm -rf "$m_srcroot/core/sdk-objc/build/"
    fi

    local ms_os_version="$m_platform"
    local ms_macfuse_version=`awk '/#define[ \t]*MACFUSE_VERSION_LITERAL/ {print $NF}' "$kernel_dir"/common/fuse_version.h`
    m_exit_on_error "cannot get platform-specific MacFUSE version."

    local ms_macfuse_out="$M_CONF_TMPDIR/macfuse-core-$ms_os_version-$ms_macfuse_version"
    local ms_macfuse_build="$ms_macfuse_out/build/"
    local ms_macfuse_root="$ms_macfuse_out/pkgroot/"

    if [ "$m_shortcircuit" != "1" ]
    then
        if [ -e "$ms_macfuse_out" ]
        then
            m_set_suprompt "to remove a previously built platform-specific package"
            sudo -p "$m_suprompt" rm -rf "$ms_macfuse_out"
            m_exit_on_error "failed to clean up previous platform-specific MacFUSE build."
        fi
        if [ -e "$M_CONF_TMPDIR/macfuse-core-$ms_os_version-"* ]
        then
            m_warn "removing unrecognized version of platform-specific package"
            m_set_suprompt "to remove unrecognized version of platform-specific package"
            sudo -p "$m_suprompt" rm -rf "$M_CONF_TMPDIR/macfuse-core-$ms_os_version-"*
            m_exit_on_error "failed to clean up unrecognized version of platform-specific package."
        fi
    else
        if [ -e "$ms_macfuse_out/$M_PKGNAME_CORE" ]
        then
            echo >$m_stdout
            m_log "succeeded (shortcircuited), results in '$ms_macfuse_out'."
            echo >$m_stdout
            return 0
        fi
    fi

    if [ "$1" == "clean" ]
    then
        local retval=$?
        m_log "cleaned (platform $m_platform)"
        return $retval
    fi

    m_log "initiating Universal build for $m_platform"

    cd "$kernel_dir"
    m_exit_on_error "failed to access the kext source directory '$kernel_dir'."

    m_log "building MacFUSE kernel extension and tools"

    if [ "$m_developer" == "0" ]
    then
        xcodebuild -configuration "$m_configuration" -target All >$m_stdout 2>$m_stderr
    else
        xcodebuild MACFUSE_BUILD_FLAVOR=Beta -configuration "$m_configuration" -target All >$m_stdout 2>$m_stderr
    fi

    m_exit_on_error "xcodebuild cannot build configuration $m_configuration."

    # Go for it

    local ms_project_dir="$kernel_dir"

    local ms_built_products_dir="$kernel_dir/build/$m_configuration/"
    if [ ! -d "$ms_built_products_dir" ]
    then
        m_exit_on_error "cannot find built products directory."
    fi

    ms_macfuse_system_dir=""

    mkdir -p "$ms_macfuse_build"
    m_exit_on_error "cannot make new build directory '$ms_macfuse_build'."

    mkdir -p "$ms_macfuse_root"
    m_exit_on_error "cannot make directory '$ms_macfuse_root'."

    mkdir -p "$ms_macfuse_root$ms_macfuse_system_dir/Library/Filesystems/"
    m_exit_on_error "cannot make directory '$ms_macfuse_root$ms_macfuse_system_dir/Library/Filesystems/'."

    mkdir -p "$ms_macfuse_root/Library/Frameworks/"
    m_exit_on_error "cannot make directory '$ms_macfuse_root/Library/Frameworks/'."

    mkdir -p "$ms_macfuse_root/usr/local/lib/"
    m_exit_on_error "cannot make directory '$ms_macfuse_root/usr/local/lib/'."

    mkdir -p "$ms_macfuse_root/usr/local/include/"
    m_exit_on_error "cannot make directory '$ms_macfuse_root/usr/local/include/'."

    mkdir -p "$ms_macfuse_root/usr/local/lib/pkgconfig/"
    m_exit_on_error "cannot make directory '$ms_macfuse_root/usr/local/lib/pkgconfig/'."

    local ms_bundle_dir_generic="/Library/Filesystems/$M_FSBUNDLE_NAME"
    local ms_bundle_dir="$ms_macfuse_root$ms_macfuse_system_dir/$ms_bundle_dir_generic"
    local ms_bundle_support_dir="$ms_bundle_dir/Support"

    cp -pRX "$ms_built_products_dir/$M_FSBUNDLE_NAME" "$ms_bundle_dir"
    m_exit_on_error "cannot copy '$M_FSBUNDLE_NAME' to destination."

    mkdir -p "$ms_bundle_support_dir"
    m_exit_on_error "cannot make directory '$ms_bundle_support_dir'."

    cp -pRX "$ms_built_products_dir/$M_KEXT_NAME" "$ms_bundle_support_dir/$M_KEXT_NAME"
    m_exit_on_error "cannot copy '$M_KEXT_NAME' to destination."

    cp -pRX "$ms_built_products_dir/load_fusefs" "$ms_bundle_support_dir/load_fusefs"
    m_exit_on_error "cannot copy 'load_fusefs' to destination."

    cp -pRX "$ms_built_products_dir/mount_fusefs" "$ms_bundle_support_dir/mount_fusefs"
    m_exit_on_error "cannot copy 'mount_fusefs' to destination."

    cp -pRX "$m_srcroot/core/$m_platform/packaging/macfuse-core/uninstall-macfuse-core.sh" "$ms_bundle_support_dir/uninstall-macfuse-core.sh"
    m_exit_on_error "cannot copy 'uninstall-macfuse-core.sh' to destination."

    ln -s "/Library/PreferencePanes/MacFUSE.prefPane/Contents/MacOS/autoinstall-macfuse-core" "$ms_bundle_support_dir/autoinstall-macfuse-core"
    m_exit_on_error "cannot create legacy symlink '$ms_bundle_support_dir/autoinstall-macfuse-core'".

    # Build the user-space MacFUSE library
    #

    m_log "building user-space MacFUSE library"

    tar -C "$ms_macfuse_build" -xzf "$lib_dir/$M_LIBFUSE_SRC" \
        >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot untar MacFUSE library source from '$M_LIBFUSE_SRC'."

    cd "$ms_macfuse_build"/fuse*
    m_exit_on_error "cannot access MacFUSE library source in '$ms_macfuse_build/fuse*'."

    patch -p1 < "$lib_dir/$M_LIBFUSE_PATCH" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot patch MacFUSE library source."

    /bin/sh ./darwin_configure.sh "$kernel_dir" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot configure MacFUSE library source for compilation."

    make -j2 >$m_stdout 2>$m_stderr
    m_exit_on_error "make failed while compiling the MacFUSE library."

    make install DESTDIR="$ms_macfuse_root" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot prepare library build for installation."

    ln -s libfuse.dylib "$ms_macfuse_root/usr/local/lib/libfuse.0.dylib"
    m_exit_on_error "cannot create compatibility symlink."

    rm -f "ms_macfuse_root"/usr/local/lib/*ulockmgr*
    # ignore any errors

    rm -f "ms_macfuse_root"/usr/local/include/*ulockmgr*
    # ignore any errors

    # Now build again, if necessary, with 64-bit inode support
    #

    m_log "building user-space MacFUSE library (ino64)"

    cd "$ms_macfuse_build"/fuse*/lib
    m_exit_on_error "cannot access MacFUSE library (ino64) source in '$ms_macfuse_build/fuse*/lib'."

    make clean >$m_stdout 2>$m_stderr
    m_exit_on_error "make failed while compiling the MacFUSE library (ino64)."

    perl -pi -e 's#libfuse#libfuse_ino64#g' Makefile
    m_exit_on_error "failed to prepare MacFUSE library (ino64) for compilation."

    perl -pi -e 's#-D__FreeBSD__=10#-D__DARWIN_64_BIT_INO_T=1 -D__FreeBSD__=10#g' Makefile
    m_exit_on_error "failed to prepare MacFUSE library (ino64) for compilation."

    make -j2 >$m_stdout 2>$m_stderr
    m_exit_on_error "make failed while compiling the MacFUSE library (ino64)."

    make install DESTDIR="$ms_macfuse_root" >$m_stdout 2>$m_stderr
    m_exit_on_error "cannot prepare MacFUSE library (ino64) build for installation."

    rm -f "$ms_macfuse_root"/usr/local/lib/*ulockmgr*
    # ignore any errors

    rm -f "$ms_macfuse_root"/usr/local/include/*ulockmgr*
    # ignore any errors

    # generate dsym
    dsymutil "$ms_macfuse_root"/usr/local/lib/libfuse.dylib
    m_exit_on_error "cannot generate debugging information for libfuse."
    dsymutil "$ms_macfuse_root"/usr/local/lib/libfuse_ino64.dylib
    m_exit_on_error "cannot generate debugging information for libfuse_ino64."

    # Build MacFUSE.framework
    #

    m_log "building MacFUSE Objective-C SDK"

    cd "$ms_project_dir/../../sdk-objc"
    m_exit_on_error "cannot access Objective-C SDK directory."

    rm -rf build/
    m_exit_on_error "cannot remove previous build of MacFUSE.framework."

    xcodebuild -configuration "$m_configuration" -target "MacFUSE-$ms_os_version" "MACFUSE_BUILD_ROOT=$ms_macfuse_root" "MACFUSE_BUNDLE_VERSION_LITERAL=$ms_macfuse_version" >$m_stdout 2>$m_stderr
    m_exit_on_error "xcodebuild cannot build configuration '$m_configuration'."

    cp -pRX build/"$m_configuration"/*.framework "$ms_macfuse_root/Library/Frameworks/"
    m_exit_on_error "cannot copy 'MacFUSE.framework' to destination."

    mv "$ms_macfuse_root"/usr/local/lib/*.dSYM "$ms_macfuse_root"/Library/Frameworks/MacFUSE.framework/Resources/Debug/
    mkdir -p "$ms_macfuse_root/Library/Application Support/Developer/Shared/Xcode/Project Templates"
    m_exit_on_error "cannot create directory for Xcode templates."
    ln -s "/Library/Frameworks/MacFUSE.framework/Resources/ProjectTemplates/" "$ms_macfuse_root/Library/Application Support/Developer/Shared/Xcode/Project Templates/MacFUSE"
    m_exit_on_error "cannot create symlink for Xcode templates."

    m_set_suprompt "to chown '$ms_macfuse_root/*'"
    sudo -p "$m_suprompt" chown -R root:wheel "$ms_macfuse_root"/*
    m_exit_on_error "cannot chown '$ms_macfuse_root/*'."

    m_set_suprompt "to setuid 'load_fusefs'"
    sudo -p "$m_suprompt" chmod u+s "$ms_bundle_support_dir/load_fusefs"
    m_exit_on_error "cannot setuid 'load_fusefs'."

    m_set_suprompt "to chown '$ms_macfuse_root/Library/'"
    sudo -p "$m_suprompt" chown root:admin "$ms_macfuse_root/Library/"
    m_exit_on_error "cannot chown '$ms_macfuse_root/Library/'."

    m_set_suprompt "to chown '$ms_macfuse_root/Library/Frameworks/"
    sudo -p "$m_suprompt" \
        chown -R root:admin "$ms_macfuse_root/Library/Frameworks/"
    m_exit_on_error "cannot chown '$ms_macfuse_root/Library/Frameworks/'."

    m_set_suprompt "to chmod '$ms_macfuse_root/Library/Frameworks/'"
    sudo -p "$m_suprompt" chmod 0775 "$ms_macfuse_root/Library/Frameworks/"
    m_exit_on_error "cannot chmod '$ms_macfuse_root/Library/Frameworks/'."

    m_set_suprompt "to chmod '$ms_macfuse_root/Library/'"
    sudo -p "$m_suprompt" chmod 1775 "$ms_macfuse_root/Library/"
    m_exit_on_error "cannot chmod '$ms_macfuse_root/Library/'."

    m_set_suprompt "to chmod files in '$ms_macfuse_root/usr/local/lib/'"
    sudo -p "$m_suprompt" \
        chmod -h 755 `find "$ms_macfuse_root/usr/local/lib" -type l`
    m_exit_on_error "cannot chmod files in '$ms_macfuse_root/usr/local/lib/'."

    m_set_suprompt "to chmod files in '$ms_macfuse_root/Library/Frameworks/'"
    sudo -p "$m_suprompt" \
        chmod -h 755 `find "$ms_macfuse_root/Library/Frameworks/" -type l`
    # no exit upon error

    cd "$ms_macfuse_root"
    m_exit_on_error "cannot access directory '$ms_macfuse_root'."

    # Create the MacFUSE Installer Package
    #

    m_log "building installer package for $m_platform"

    m_build_pkg "$ms_macfuse_version" "$m_srcroot/core/$m_platform/packaging/macfuse-core" "$ms_macfuse_root" "$M_PKGNAME_CORE" "$ms_macfuse_out"
    m_exit_on_error "cannot create '$M_PKGNAME_CORE'."

    echo >$m_stdout
    m_log "succeeded, results in '$ms_macfuse_out'."
    echo >$m_stdout

    return 0
}

function m_handler_swconfigure()
{
    m_active_target="swconfigure"

    m_set_platform

    m_set_srcroot "$m_platform"

    local lib_dir="$m_srcroot"/core/"$m_platform"/libfuse
    if [ ! -d "$lib_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$lib_dir'."
    fi

    local kernel_dir="$m_srcroot"/core/"$m_platform"/fusefs
    if [ ! -d "$kernel_dir" ]
    then
        false
        m_exit_on_error "cannot access directory '$kernel_dir'."
    fi

    local current_dir=`pwd`
    local current_product=`basename "$current_dir"`

    local extra_cflags=""
    local architectures=""

    architectures="-arch i386 -arch x86_64"

    local common_cflags="-O0 -g $architectures -isysroot $m_usdk_dir -I/usr/local/include"
    local common_ldflags="-Wl,-syslibroot,$m_usdk_dir $architectures -L/usr/local/lib"

    local final_cflags="$common_cflags $extra_cflags"
    local final_ldflags="$common_ldflags"

    local retval=1

    # For pkg-config and such
    PATH=$PATH:/usr/local/sbin:/usr/local/bin
    export PATH

    # We have some special cases for current_product

    case "$current_product" in

    gettext*)
        m_log "Configuring Universal build of gettext for Mac OS X \"$m_osname\""
        CFLAGS="$final_cflags -D_POSIX_C_SOURCE=200112L" LDFLAGS="$final_ldflags -fno-common" ./configure --prefix=/usr/local --disable-dependency-tracking --with-libiconv-prefix="$m_usdk_dir"/usr
        retval=$?
        ;; 

    glib*)
        m_log "Configuring Universal build of glib for Mac OS X \"$m_osname\""
        CFLAGS="$final_cflags" LDFLAGS="$final_ldflags" ./configure --prefix=/usr/local --disable-dependency-tracking --enable-static
        retval=$?
        ;;

    pkg-config*)
        m_log "Configuring Universal build of pkg-config for Mac OS X \"$m_osname\""
        CFLAGS="$final_cflags" LDFLAGS="$final_ldflags" ./configure --prefix=/usr/local --disable-dependency-tracking
        ;;

    *sshfs*)
        m_log "Configuring Universal build of sshfs for Mac OS X \"$m_osname\""
        CFLAGS="$final_cflags -D__FreeBSD__=10 -DDARWIN_SEMAPHORE_COMPAT -DSSH_NODELAY_WORKAROUND" LDFLAGS="$final_ldflags" ./configure --prefix=/usr/local --disable-dependency-tracking
        ;;

    *)
        m_log "Configuring Universal build of generic software for Mac OS X \"$m_osname\""
        CFLAGS="$final_cflags" LDFLAGS="$final_ldflags" ./configure --prefix=/usr/local --disable-dependency-tracking
        ;;

    esac

    return $retval
}

# --

function m_validate_xcode()
{
    m_xcode_version=`xcodebuild -version | head -1 | grep Xcode | awk '{print $NF}'`
    if [ $? != 0 ] || [ -z "$m_xcode_version" ]
    then
        echo "failed to determine Xcode version."
        exit 2
    fi

    local mvs_xcode_major=`echo $m_xcode_version | cut -d . -f 1`
    local mvs_xcode_minor=`echo $m_xcode_version | cut -d . -f 2`
    if [ -z $mvs_xcode_minor ]
    then
        mvs_xcode_minor=0
    fi
    local mvs_xcode_rev=`echo $m_xcode_version | cut -d . -f 3`
    if [ -z $mvs_xcode_rev ]
    then
        mvs_xcode_rev=0
    fi
    local mvs_have=$(( $mvs_xcode_major * 100 + $mvs_xcode_minor * 10 + $mvs_xcode_rev ))

    mvs_xcode_major=`echo $M_XCODE_VERSION_REQUIRED | cut -d . -f 1`
    mvs_xcode_minor=`echo $M_XCODE_VERSION_REQUIRED | cut -d . -f 2`
    if [ -z $mvs_xcode_minor ]
    then
        mvs_xcode_minor=0
    fi
    mvs_xcode_rev=`echo $M_XCODE_VERSION_REQUIRED | cut -d . -f 3`
    if [ -z $mvs_xcode_rev ]
    then
        mvs_xcode_rev=0
    fi
    local mvs_want=$(( $mvs_xcode_major * 100 + $mvs_xcode_minor * 10 + $mvs_xcode_rev ))

    if [ $mvs_have -lt $mvs_want ]
    then
        echo "Xcode version $M_XCODE_VERSION_REQUIRED or higher is required to build MacFUSE."
        exit 2
    fi 

    m_active_target="preflight"
    m_log "Xcode version $m_xcode_version found (minimum requirement is $M_XCODE_VERSION_REQUIRED)"

    return 0
}

function m_validate_input()
{
    local mvi_found=
    local mvi_good=

    # Validate scratch directory
    if [ ! -d "$M_CONF_TMPDIR" ] || [ ! -w "$M_CONF_TMPDIR" ]
    then
        echo "M_CONF_TMPDIR (currently '$M_CONF_TMPDIR') must be set to a writeable directory."
        exit 2
    fi

    # Validate if platform was specified when it shouldn't have been
    #
    if [ "$m_platform" != "$M_DEFAULT_PLATFORM" ]
    then
        mvi_found="0"
        for m_p in $M_TARGETS_WITH_PLATFORM
        do
            if [ "$m_target" == "$m_p" ]
            then
                mvi_found="1"
                break
            fi
        done
        if [ "$mvi_found" == "0" ]
        then
            echo "Unknown argument or invalid combination of arguments."
            echo  "Try $0 -h for help."
            exit 2
        fi
    fi

    # Validate platform
    if [ "$m_platform" != "$M_DEFAULT_PLATFORM" ]
    then
        mvi_good="0"
        for m_p in $M_PLATFORMS
        do
            if [ "$m_platform" == "$m_p" ]
            then
                mvi_good="1"
                break
            fi
        done
        if [ "$mvi_good" == "0" ]
        then
            echo "Unknown platform '$m_platform'."
            echo "Valid platforms are: $M_PLATFORMS."
            exit 2
        fi
    fi

    # Validate target
    #
    if [ "$m_target" != "$M_DEFAULT_TARGET" ]
    then
        mvi_good="0"
        for m_t in $M_TARGETS
        do
            if [ "$m_target" == "$m_t" ]
            then
                mvi_good="1"
                break
            fi
        done
        if [ "$mvi_good" == "0" ]
        then
            echo "Unknown target '$m_target'."
            echo "Valid targets are: $M_TARGETS."
            exit 2
        fi
    fi

    # Validate configuration
    #
    mvi_good="0"
    for m_c in $M_CONFIGURATIONS
    do
        if [ "$m_configuration" == "$m_c" ]
        then
            mvi_good="1"
            break
        fi
    done
    if [ "$mvi_good" == "0" ]
    then
        echo "Unknown configuration '$m_configuration'."
        echo "Valid configurations are: $M_CONFIGURATIONS."
        exit 2
    fi

    if [ "$m_shortcircuit" == "1" ] && [ "$m_target" == "clean" ]
    then
       echo "Cleaning cannot be shortcircuited!"
       exit 2
    fi

    return 0
}

function m_read_input()
{
    m_args=`getopt c:dhp:qst:v $*`

    if [ $? != 0 ]
    then
        echo "Try $0 -h for help."
        exit 2
    fi

    set -- $m_args

    for m_i
    do
        case "$m_i" in
        -c)
            m_configuration="$2"
            shift
            shift
            ;;
        -d)
            m_developer=1
            shift
            ;;
        -h)
            m_help
            exit 0
            ;;
        -p)
            m_platform="$2"
            shift
            shift
            ;;
        -q)
            m_stderr=/dev/null
            m_stdout=/dev/null
            shift 
            ;;
        -s)
            m_shortcircuit="1"
            shift
            ;;
        -t)
            m_target="$2"
            shift
            shift
            ;;
        -v)
            m_version
            exit 0
            shift
            ;;
        --)
            shift
            break
            ;;
        esac
    done
}

function m_handler()
{
    case "$m_target" in

    "clean")
        m_handler_examples clean
        m_handler_lib clean
        m_handler_reload clean
        m_handler_dist clean
    ;;

    "dist")
        m_validate_xcode
        m_handler_dist
    ;;

    "examples")
        m_handler_examples
    ;;

    "lib")
        m_handler_lib
    ;;

    "libsrc")
        m_handler_libsrc
    ;;

    "reload")
        m_validate_xcode
        m_handler_reload
    ;;

    "smalldist")
        m_validate_xcode
        m_handler_smalldist
    ;;

    "swconfigure")
        m_handler_swconfigure
    ;;

    *)
        echo "Try $0 -h for help."
    ;;

    esac
}

# main()
# {
    m_read_input $*
    m_validate_input
    m_handler
    exit $?
# }