gentoo-x86/eclass/eutils.eclass

# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/eutils.eclass,v 1.94 2004/08/13 15:39:40 vapier Exp $
#
# Author: Martin Schlemmer <azarah@gentoo.org>
#
# This eclass is for general purpose functions that most ebuilds
# have to implement themselves.
#
# NB:  If you add anything, please comment it!

ECLASS=eutils
INHERITED="$INHERITED $ECLASS"

DEPEND="!bootstrap? ( sys-devel/patch )"

DESCRIPTION="Based on the ${ECLASS} eclass"

# This function generate linker scripts in /usr/lib for dynamic
# libs in /lib.  This is to fix linking problems when you have
# the .so in /lib, and the .a in /usr/lib.  What happens is that
# in some cases when linking dynamic, the .a in /usr/lib is used
# instead of the .so in /lib due to gcc/libtool tweaking ld's
# library search path.  This cause many builds to fail.
# See bug #4411 for more info.
#
# To use, simply call:
#
#   gen_usr_ldscript libfoo.so
#
# Note that you should in general use the unversioned name of
# the library, as ldconfig should usually update it correctly
# to point to the latest version of the library present.
#
# <azarah@gentoo.org> (26 Oct 2002)
#
gen_usr_ldscript() {
        # this adds support for installing to lib64/lib32. since only portage
        # 2.0.51 will have this functionality supported in dolib and friends,
        # and since it isnt expected that many profiles will define it, we need
        # to make this variable default to lib.
        [ -z "${CONF_LIBDIR}" ] && CONF_LIBDIR="lib"

        # Just make sure it exists
        dodir /usr/${CONF_LIBDIR}

        cat > ${D}/usr/${CONF_LIBDIR}/$1 <<"END_LDSCRIPT"
/* GNU ld script
   Because Gentoo have critical dynamic libraries
   in /lib, and the static versions in /usr/lib, we
   need to have a "fake" dynamic lib in /usr/lib,
   otherwise we run into linking problems.
   See bug #4411 on http://bugs.gentoo.org/ for
   more info.  */
END_LDSCRIPT

        echo "GROUP ( /${CONF_LIBDIR}/libxxx )" >> ${D}/usr/${CONF_LIBDIR}/$1
        dosed "s:libxxx:$1:" /usr/${CONF_LIBDIR}/$1

        return 0
}

# Simple function to draw a line consisting of '=' the same length as $*
#
# <azarah@gentoo.org> (11 Nov 2002)
#
draw_line() {
        local i=0
        local str_length=""

        # Handle calls that do not have args, or wc not being installed ...
        if [ -z "$1" -o ! -x "$(which wc 2>/dev/null)" ]
        then
                echo "==============================================================="
                return 0
        fi

        # Get the length of $*
        str_length="$(echo -n "$*" | wc -m)"

        while [ "$i" -lt "${str_length}" ]
        do
                echo -n "="

                i=$((i + 1))
        done

        echo

        return 0
}

# Default directory where patches are located
EPATCH_SOURCE="${WORKDIR}/patch"
# Default extension for patches
EPATCH_SUFFIX="patch.bz2"
# Default options for patch
# Set -g0 to keep RCS, ClearCase, Perforce and SCCS happy. Bug #24571
EPATCH_OPTS="-g0"
# List of patches not to apply.  Not this is only file names,
# and not the full path ..
EPATCH_EXCLUDE=""
# Change the printed message for a single patch.
EPATCH_SINGLE_MSG=""
# Force applying bulk patches even if not following the style:
#
#   ??_${ARCH}_foo.${EPATCH_SUFFIX}
#
EPATCH_FORCE="no"

# This function is for bulk patching, or in theory for just one
# or two patches.
#
# It should work with .bz2, .gz, .zip and plain text patches.
# Currently all patches should be the same format.
#
# You do not have to specify '-p' option to patch, as it will
# try with -p0 to -p5 until it succeed, or fail at -p5.
#
# Above EPATCH_* variables can be used to control various defaults,
# bug they should be left as is to ensure an ebuild can rely on
# them for.
#
# Patches are applied in current directory.
#
# Bulk Patches should preferibly have the form of:
#
#   ??_${ARCH}_foo.${EPATCH_SUFFIX}
#
# For example:
#
#   01_all_misc-fix.patch.bz2
#   02_sparc_another-fix.patch.bz2
#
# This ensures that there are a set order, and you can have ARCH
# specific patches.
#
# If you however give an argument to epatch(), it will treat it as a
# single patch that need to be applied if its a file.  If on the other
# hand its a directory, it will set EPATCH_SOURCE to this.
#
# <azarah@gentoo.org> (10 Nov 2002)
#
epatch() {
        local PIPE_CMD=""
        local STDERR_TARGET="${T}/$$.out"
        local PATCH_TARGET="${T}/$$.patch"
        local PATCH_SUFFIX=""
        local SINGLE_PATCH="no"
        local x=""

        if [ "$#" -gt 1 ]
        then
                local m=""
                einfo "${#} patches to apply..."
                for m in "$@" ; do
                        epatch "${m}"
                done
                return 0
        fi

        if [ -n "$1" -a -f "$1" ]
        then
                SINGLE_PATCH="yes"

                local EPATCH_SOURCE="$1"
                local EPATCH_SUFFIX="${1##*\.}"

        elif [ -n "$1" -a -d "$1" ]
        then
                # Allow no extension if EPATCH_FORCE=yes ... used by vim for example ...
                if [ "${EPATCH_FORCE}" = "yes" ] && [ -z "${EPATCH_SUFFIX}" ]
                then
                        local EPATCH_SOURCE="$1/*"
                else
                        local EPATCH_SOURCE="$1/*.${EPATCH_SUFFIX}"
                fi
        else
                if [ ! -d ${EPATCH_SOURCE} ]
                then
                        if [ -n "$1" -a "${EPATCH_SOURCE}" = "${WORKDIR}/patch" ]
                        then
                                EPATCH_SOURCE="$1"
                        fi

                        echo
                        eerror "Cannot find \$EPATCH_SOURCE!  Value for \$EPATCH_SOURCE is:"
                        eerror
                        eerror "  ${EPATCH_SOURCE}"
                        echo
                        die "Cannot find \$EPATCH_SOURCE!"
                fi

                local EPATCH_SOURCE="${EPATCH_SOURCE}/*.${EPATCH_SUFFIX}"
        fi

        case ${EPATCH_SUFFIX##*\.} in
                bz2)
                        PIPE_CMD="bzip2 -dc"
                        PATCH_SUFFIX="bz2"
                        ;;
                gz|Z|z)
                        PIPE_CMD="gzip -dc"
                        PATCH_SUFFIX="gz"
                        ;;
                ZIP|zip)
                        PIPE_CMD="unzip -p"
                        PATCH_SUFFIX="zip"
                        ;;
                *)
                        PIPE_CMD="cat"
                        PATCH_SUFFIX="patch"
                        ;;
        esac

        if [ "${SINGLE_PATCH}" = "no" ]
        then
                einfo "Applying various patches (bugfixes/updates)..."
        fi
        for x in ${EPATCH_SOURCE}
        do
                # New ARCH dependant patch naming scheme...
                #
                #   ???_arch_foo.patch
                #
                if [ -f ${x} ] && \
                   ([ "${SINGLE_PATCH}" = "yes" -o "${x/_all_}" != "${x}" -o "`eval echo \$\{x/_${ARCH}_\}`" != "${x}" ] || \
                    [ "${EPATCH_FORCE}" = "yes" ])
                then
                        local count=0
                        local popts="${EPATCH_OPTS}"

                        if [ -n "${EPATCH_EXCLUDE}" ]
                        then
                                if [ "`eval echo \$\{EPATCH_EXCLUDE/${x##*/}\}`" != "${EPATCH_EXCLUDE}" ]
                                then
                                        continue
                                fi
                        fi

                        if [ "${SINGLE_PATCH}" = "yes" ]
                        then
                                if [ -n "${EPATCH_SINGLE_MSG}" ]
                                then
                                        einfo "${EPATCH_SINGLE_MSG}"
                                else
                                        einfo "Applying ${x##*/}..."
                                fi
                        else
                                einfo "  ${x##*/}..."
                        fi

                        echo "***** ${x##*/} *****" > ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}
                        echo >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}

                        # Allow for prefix to differ ... im lazy, so shoot me :/
                        while [ "${count}" -lt 5 ]
                        do
                                # Generate some useful debug info ...
                                draw_line "***** ${x##*/} *****" >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}
                                echo >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}

                                if [ "${PATCH_SUFFIX}" != "patch" ]
                                then
                                        echo -n "PIPE_COMMAND:  " >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}
                                        echo "${PIPE_CMD} ${x} > ${PATCH_TARGET}" >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}
                                else
                                        PATCH_TARGET="${x}"
                                fi

                                echo -n "PATCH COMMAND:  " >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}
                                echo "patch -p${count} ${popts} < ${PATCH_TARGET}" >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}

                                echo >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}
                                draw_line "***** ${x##*/} *****" >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}

                                if [ "${PATCH_SUFFIX}" != "patch" ]
                                then
                                        if ! (${PIPE_CMD} ${x} > ${PATCH_TARGET}) >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/} 2>&1
                                        then
                                                echo
                                                eerror "Could not extract patch!"
                                                #die "Could not extract patch!"
                                                count=5
                                                break
                                        fi
                                fi

                                if (cat ${PATCH_TARGET} | patch -p${count} ${popts} --dry-run -f) >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/} 2>&1
                                then
                                        draw_line "***** ${x##*/} *****" >      ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}.real
                                        echo >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}.real
                                        echo "ACTUALLY APPLYING ${x##*/}..." >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}.real
                                        echo >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}.real
                                        draw_line "***** ${x##*/} *****" >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}.real

                                        cat ${PATCH_TARGET} | patch -p${count} ${popts} >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}.real 2>&1

                                        if [ "$?" -ne 0 ]
                                        then
                                                cat ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}.real >> ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}
                                                echo
                                                eerror "A dry-run of patch command succeeded, but actually"
                                                eerror "applying the patch failed!"
                                                #die "Real world sux compared to the dreamworld!"
                                                count=5
                                        fi

                                        rm -f ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}.real

                                        break
                                fi

                                count=$((count + 1))
                        done

                        if [ "${PATCH_SUFFIX}" != "patch" ]
                        then
                                rm -f ${PATCH_TARGET}
                        fi

                        if [ "${count}" -eq 5 ]
                        then
                                echo
                                eerror "Failed Patch: ${x##*/}!"
                                eerror
                                eerror "Include in your bugreport the contents of:"
                                eerror
                                eerror "  ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}"
                                echo
                                die "Failed Patch: ${x##*/}!"
                        fi

                        rm -f ${STDERR_TARGET%/*}/${x##*/}-${STDERR_TARGET##*/}

                        eend 0
                fi
        done
        if [ "${SINGLE_PATCH}" = "no" ]
        then
                einfo "Done with patching"
        fi
}

# This function return true if we are using the NPTL pthreads
# implementation.
#
# <azarah@gentoo.org> (06 March 2003)
#

have_NPTL() {

        cat > ${T}/test-nptl.c <<-"END"
                #define _XOPEN_SOURCE
                #include <unistd.h>
                #include <stdio.h>

                int main()
                {
                  char buf[255];
                  char *str = buf;

                  confstr(_CS_GNU_LIBPTHREAD_VERSION, str, 255);
                  if (NULL != str) {
                    printf("%s\n", str);
                    if (NULL != strstr(str, "NPTL"))
                      return 0;
                  }

                  return 1;
                }
        END

        einfon "Checking for _CS_GNU_LIBPTHREAD_VERSION support in glibc ... "
        if gcc -o ${T}/nptl ${T}/test-nptl.c &> /dev/null
        then
                echo "yes"
                einfon "Checking what PTHREADS implementation we have ... "
                if ${T}/nptl
                then
                        return 0
                else
                        return 1
                fi
        else
                echo "no"
        fi

        return 1
}

# This function check how many cpu's are present, and then set
# -j in MAKEOPTS accordingly.
#
# Thanks to nall <nall@gentoo.org> for this.
#
get_number_of_jobs() {
        local jobs=0

        if [ ! -r /proc/cpuinfo ]
        then
                return 1
        fi

        # This bit is from H?kan Wessberg <nacka-gentoo@refug.org>, bug #13565.
        if [ "`egrep "^[[:space:]]*MAKEOPTS=" /etc/make.conf | wc -l`" -gt 0 ]
        then
                ADMINOPTS="`egrep "^[[:space:]]*MAKEOPTS=" /etc/make.conf | cut -d= -f2 | sed 's/\"//g'`"
                ADMINPARAM="`echo ${ADMINOPTS} | gawk '{match($0, /-j *[0-9]*/, opt); print opt[0]}'`"
                ADMINPARAM="${ADMINPARAM/-j}"
        fi

        export MAKEOPTS="`echo ${MAKEOPTS} | sed -e 's:-j *[0-9]*::g'`"

        if [ "${ARCH}" = "amd64" -o "${ARCH}" = "x86" -o "${ARCH}" = "hppa" -o \
                "${ARCH}" = "arm" -o "${ARCH}" = "mips" -o "${ARCH}" = "ia64" ]
        then
                # these archs will always have "[Pp]rocessor"
                jobs="$((`grep -c ^[Pp]rocessor /proc/cpuinfo` * 2))"

        elif [ "${ARCH}" = "sparc" -o "${ARCH}" = "sparc64" ]
        then
                # sparc always has "ncpus active"
                jobs="$((`grep "^ncpus active" /proc/cpuinfo | sed -e "s/^.*: //"` * 2))"

        elif [ "${ARCH}" = "alpha" ]
        then
                # alpha has "cpus active", but only when compiled with SMP
                if [ "`grep -c "^cpus active" /proc/cpuinfo`" -eq 1 ]
                then
                        jobs="$((`grep "^cpus active" /proc/cpuinfo | sed -e "s/^.*: //"` * 2))"
                else
                        jobs=2
                fi

        elif [ "${ARCH}" = "ppc" -o "${ARCH}" = "ppc64" ]
        then
                # ppc has "processor", but only when compiled with SMP
                if [ "`grep -c "^processor" /proc/cpuinfo`" -eq 1 ]
                then
                        jobs="$((`grep -c ^processor /proc/cpuinfo` * 2))"
                else
                        jobs=2
                fi
        elif [ "${ARCH}" = "s390" ]
        then
                # s390 has "# processors    : "
                jobs="$((`grep "^\# processors" /proc/cpuinfo | sed -e "s/^.*: //"` * 2))"
        else
                jobs="$((`grep -c ^cpu /proc/cpuinfo` * 2))"
                die "Unknown ARCH -- ${ARCH}!"
        fi

        # Make sure the number is valid ...
        if [ "${jobs}" -lt 1 ]
        then
                jobs=1
        fi

        if [ -n "${ADMINPARAM}" ]
        then
                if [ "${jobs}" -gt "${ADMINPARAM}" ]
                then
                        einfo "Setting make jobs to \"-j${ADMINPARAM}\" to ensure successful merge..."
                        export MAKEOPTS="${MAKEOPTS} -j${ADMINPARAM}"
                else
                        einfo "Setting make jobs to \"-j${jobs}\" to ensure successful merge..."
                        export MAKEOPTS="${MAKEOPTS} -j${jobs}"
                fi
        fi
}

# Cheap replacement for when debianutils (and thus mktemp)
# does not exist on the users system
# vapier@gentoo.org
#
# Takes just 1 parameter (the directory to create tmpfile in)
mymktemp() {
        local topdir="$1"
        
        [ -z "${topdir}" ] && topdir=/tmp
        if [ "`which mktemp 2>/dev/null`" ]
        then
                mktemp -p ${topdir}
        else
                local tmp="${topdir}/tmp.${RANDOM}.${RANDOM}.${RANDOM}"
                touch ${tmp}
                echo ${tmp}
        fi
}

# Small wrapper for getent (Linux) and nidump (Mac OS X)
# used in enewuser()/enewgroup()
# Joe Jezak <josejx@gmail.com> and usata@gentoo.org
#
# egetent(database, key)
egetent() {
        if [ "${ARCH}" == "macos" ] ; then      
                case "$2" in
                  *[!0-9]*) # Non numeric
                        nidump $1 . | awk -F":" "{ if (\$1 ~ /^$2$/) {print \$0;exit;} }"
                        ;;
                  *)    # Numeric
                        nidump $1 . | awk -F":" "{ if (\$3 == $2) {print \$0;exit;} }"
                        ;;
                esac
        else
                getent $1 $2
        fi
}

# Simplify/standardize adding users to the system
# vapier@gentoo.org
#
# enewuser(username, uid, shell, homedir, groups, extra options)
#
# Default values if you do not specify any:
# username:     REQUIRED !
# uid:          next available (see useradd(8))
#               note: pass -1 to get default behavior
# shell:        /bin/false
# homedir:      /dev/null
# groups:       none
# extra:        comment of 'added by portage for ${PN}'
enewuser() {
        # get the username
        local euser="$1"; shift
        if [ -z "${euser}" ]
        then
                eerror "No username specified !"
                die "Cannot call enewuser without a username"
        fi

        # lets see if the username already exists
        if [ "${euser}" == "`egetent passwd \"${euser}\" | cut -d: -f1`" ]
        then
                return 0
        fi
        einfo "Adding user '${euser}' to your system ..."

        # options to pass to useradd
        local opts=

        # handle uid
        local euid="$1"; shift
        if [ ! -z "${euid}" ] && [ "${euid}" != "-1" ]
        then
                if [ "${euid}" -gt 0 ]
                then
                        if [ ! -z "`egetent passwd ${euid}`" ]
                        then
                                euid="next"
                        fi
                else
                        eerror "Userid given but is not greater than 0 !"
                        die "${euid} is not a valid UID"
                fi
        else
                euid="next"
        fi
        if [ "${euid}" == "next" ]
        then
                local pwrange
                if [ "${ARCH}" == "macos" ] ; then
                        pwrange="`jot 898 101`"
                else
                        pwrange="`seq 101 999`"
                fi
                for euid in ${pwrange} ; do
                        [ -z "`egetent passwd ${euid}`" ] && break
                done
        fi
        opts="${opts} -u ${euid}"
        einfo " - Userid: ${euid}"

        # handle shell
        local eshell="$1"; shift
        if [ ! -z "${eshell}" ] && [ "${eshell}" != "-1" ]
        then
                if [ ! -e "${eshell}" ]
                then
                        eerror "A shell was specified but it does not exist !"
                        die "${eshell} does not exist"
                fi
        else
                eshell="/bin/false"
        fi
        einfo " - Shell: ${eshell}"
        opts="${opts} -s ${eshell}"

        # handle homedir
        local ehome="$1"; shift
        if [ -z "${ehome}" ] && [ "${eshell}" != "-1" ]
        then
                ehome="/dev/null"
        fi
        einfo " - Home: ${ehome}"
        opts="${opts} -d ${ehome}"

        # handle groups
        local egroups="$1"; shift
        if [ ! -z "${egroups}" ]
        then
                local oldifs="${IFS}"
                export IFS=","
                for g in ${egroups}
                do
                        if [ -z "`egetent group \"${g}\"`" ]
                        then
                                eerror "You must add group ${g} to the system first"
                                die "${g} is not a valid GID"
                        fi
                done
                export IFS="${oldifs}"
                opts="${opts} -g ${egroups}"
        else
                egroups="(none)"
        fi
        einfo " - Groups: ${egroups}"

        # handle extra and add the user
        local eextra="$@"
        local oldsandbox="${SANDBOX_ON}"
        export SANDBOX_ON="0"
        if [ "${ARCH}" == "macos" ];    
        then
                ### Make the user
                if [ -z "${eextra}" ]
                then
                        dscl . create /users/${euser} uid ${euid}
                        dscl . create /users/${euser} shell ${eshell}
                        dscl . create /users/${euser} home ${ehome}
                        dscl . create /users/${euser} realname "added by portage for ${PN}"
                        ### Add the user to the groups specified
                        for g in ${egroups}
                        do
                                dscl . merge /groups/${g} users ${euser}
                        done
                else
                        einfo "Extra options are not supported on macos yet"
                        einfo "Please report the ebuild along with the info below"
                        einfo "eextra: ${eextra}"
                        die "Required function missing"
                fi
        else
                if [ -z "${eextra}" ]
                then
                        useradd ${opts} ${euser} \
                                -c "added by portage for ${PN}" \
                                || die "enewuser failed"
                else
                        einfo " - Extra: ${eextra}"
                        useradd ${opts} ${euser} ${eextra} \
                                || die "enewuser failed"
                fi
        fi
        export SANDBOX_ON="${oldsandbox}"

        if [ ! -e "${ehome}" ] && [ ! -e "${D}/${ehome}" ]
        then
                einfo " - Creating ${ehome} in ${D}"
                dodir ${ehome}
                fowners ${euser} ${ehome}
                fperms 755 ${ehome}
        fi
}

# Simplify/standardize adding groups to the system
# vapier@gentoo.org
#
# enewgroup(group, gid)
#
# Default values if you do not specify any:
# groupname:    REQUIRED !
# gid:          next available (see groupadd(8))
# extra:        none
enewgroup() {
        # get the group
        local egroup="$1"; shift
        if [ -z "${egroup}" ]
        then
                eerror "No group specified !"
                die "Cannot call enewgroup without a group"
        fi

        # see if group already exists
        if [ "${egroup}" == "`egetent group \"${egroup}\" | cut -d: -f1`" ]
        then
                return 0
        fi
        einfo "Adding group '${egroup}' to your system ..."

        # options to pass to useradd
        local opts=

        # handle gid
        local egid="$1"; shift
        if [ ! -z "${egid}" ]
        then
                if [ "${egid}" -gt 0 ]
                then
                        if [ -z "`egetent group ${egid}`" ]
                        then
                                if [ "${ARCH}" == "macos" ] ; then
                                        opts="${opts} ${egid}"
                                else
                                        opts="${opts} -g ${egid}"
                                fi
                        else
                                egid="next available; requested gid taken"
                        fi
                else
                        eerror "Groupid given but is not greater than 0 !"
                        die "${egid} is not a valid GID"
                fi
        else
                egid="next available"
        fi
        einfo " - Groupid: ${egid}"

        # handle extra
        local eextra="$@"
        opts="${opts} ${eextra}"

        # add the group
        local oldsandbox="${SANDBOX_ON}"
        export SANDBOX_ON="0"
        if [ "${ARCH}" == "macos" ];    
        then
                if [ ! -z "${eextra}" ];
                then
                        einfo "Extra options are not supported on macos yet"
                        einfo "Please report the ebuild along with the info below"
                        einfo "eextra: ${eextra}"
                        die "Required function missing"
                fi
                
                # If we need the next available
                case ${egid} in
                  *[!0-9]*) # Non numeric
                        for egid in `jot 898 101`; do
                                [ -z "`egetent group ${egid}`" ] && break
                        done
                esac
                dscl . create /groups/${egroup} gid ${egid}
                dscl . create /groups/${egroup} passwd '*'      
        else
                groupadd ${opts} ${egroup} || die "enewgroup failed"
        fi
        export SANDBOX_ON="${oldsandbox}"
}

# Simple script to replace 'dos2unix' binaries
# vapier@gentoo.org
#
# edos2unix(file, <more files>...)
edos2unix() {
        for f in "$@"
        do
                cp "${f}" ${T}/edos2unix
                sed 's/\r$//' ${T}/edos2unix > "${f}"
        done
}

# Make a desktop file !
# Great for making those icons in kde/gnome startmenu !
# Amaze your friends !  Get the women !  Join today !
# gnome2 /usr/share/applications
# gnome1 /usr/share/gnome/apps/
# KDE ${KDEDIR}/share/applnk /usr/share/applnk
#
# make_desktop_entry(<binary>, [name], [icon], [type], [path])
#
# binary:       what binary does the app run with ?
# name:         the name that will show up in the menu
# icon:         give your little like a pretty little icon ...
#               this can be relative (to /usr/share/pixmaps) or
#               a full path to an icon
# type:         what kind of application is this ?  for categories:
#               http://www.freedesktop.org/standards/menu-spec/
# path:         if your app needs to startup in a specific dir
make_desktop_entry() {
        [ -z "$1" ] && eerror "You must specify the executable" && return 1

        local exec="${1}"
        local name="${2:-${PN}}"
        local icon="${3:-${PN}.png}"
        local type="${4}"
        local subdir="${6}"
        local path="${5:-${GAMES_PREFIX}}"
        if [ -z "${type}" ]
        then
                case ${CATEGORY} in
                        "app-emulation")
                                type=Emulator
                                subdir="Emulation"
                                ;;
                        "games-"*)
                                type=Game
                                subdir="Games"
                                ;;
                        "net-"*)
                                type=Network
                                subdir="${type}"
                                ;;
                        *)
                                type=
                                subdir=
                                ;;
                esac
        fi
        local desktop="${T}/${exec}.desktop"

echo "[Desktop Entry]
Encoding=UTF-8
Version=0.9.2
Name=${name}
Type=Application
Comment=${DESCRIPTION}
Exec=${exec}
Path=${path}
Icon=${icon}
Categories=Application;${type};" > ${desktop}

        if [ -d "/usr/share/applications" ]
        then
                insinto /usr/share/applications
                doins ${desktop}
        fi

        #if [ -d "/usr/share/gnome/apps" ]
        #then
        #       insinto /usr/share/gnome/apps/Games
        #       doins ${desktop}
        #fi

        #if [ ! -z "`ls /usr/kde/* 2>/dev/null`" ]
        #then
        #       for ver in /usr/kde/*
        #       do
        #               insinto ${ver}/share/applnk/Games
        #               doins ${desktop}
        #       done
        #fi

        if [ -d "/usr/share/applnk" ]
        then
                insinto /usr/share/applnk/${subdir}
                doins ${desktop}
        fi

        return 0
}

# for internal use only (unpack_pdv and unpack_makeself)
find_unpackable_file() {
        local src="$1"
        if [ -z "${src}" ]
        then
                src="${DISTDIR}/${A}"
        else
                if [ -e "${DISTDIR}/${src}" ]
                then
                        src="${DISTDIR}/${src}"
                elif [ -e "${PWD}/${src}" ]
                then
                        src="${PWD}/${src}"
                elif [ -e "${src}" ]
                then
                        src="${src}"
                fi
        fi
        [ ! -e "${src}" ] && die "Could not find requested archive ${src}"
        echo "${src}"
}

# Unpack those pesky pdv generated files ...
# They're self-unpacking programs with the binary package stuffed in
# the middle of the archive.  Valve seems to use it a lot ... too bad
# it seems to like to segfault a lot :(.  So lets take it apart ourselves.
#
# Usage: unpack_pdv [file to unpack] [size of off_t]
# - you have to specify the off_t size ... i have no idea how to extract that
#   information out of the binary executable myself.  basically you pass in
#   the size of the off_t type (in bytes) on the machine that built the pdv
#   archive.  one way to determine this is by running the following commands:
#   strings <pdv archive> | grep lseek
#   strace -elseek <pdv archive>
#   basically look for the first lseek command (we do the strings/grep because
#   sometimes the function call is _llseek or something) and steal the 2nd
#   parameter.  here is an example:
#   root@vapier 0 pdv_unpack # strings hldsupdatetool.bin | grep lseek
#   lseek
#   root@vapier 0 pdv_unpack # strace -elseek ./hldsupdatetool.bin
#   lseek(3, -4, SEEK_END)                  = 2981250
#   thus we would pass in the value of '4' as the second parameter.
unpack_pdv() {
        local src="`find_unpackable_file $1`"
        local sizeoff_t="$2"

        [ -z "${sizeoff_t}" ] && die "No idea what off_t size was used for this pdv :("

        local shrtsrc="`basename ${src}`"
        echo ">>> Unpacking ${shrtsrc} to ${PWD}"
        local metaskip=`tail -c ${sizeoff_t} ${src} | hexdump -e \"%i\"`
        local tailskip=`tail -c $((${sizeoff_t}*2)) ${src} | head -c ${sizeoff_t} |  hexdump -e \"%i\"`

        # grab metadata for debug reasons
        local metafile="`mymktemp ${T}`"
        tail -c +$((${metaskip}+1)) ${src} > ${metafile}

        # rip out the final file name from the metadata
        local datafile="`tail -c +$((${metaskip}+1)) ${src} | strings | head -n 1`"
        datafile="`basename ${datafile}`"

        # now lets uncompress/untar the file if need be
        local tmpfile="`mymktemp ${T}`"
        tail -c +$((${tailskip}+1)) ${src} 2>/dev/null | head -c 512 > ${tmpfile}

        local iscompressed="`file -b ${tmpfile}`"
        if [ "${iscompressed:0:8}" == "compress" ] ; then
                iscompressed=1
                mv ${tmpfile}{,.Z}
                gunzip ${tmpfile}
        else
                iscompressed=0
        fi
        local istar="`file -b ${tmpfile}`"
        if [ "${istar:0:9}" == "POSIX tar" ] ; then
                istar=1
        else
                istar=0
        fi

        #for some reason gzip dies with this ... dd cant provide buffer fast enough ?
        #dd if=${src} ibs=${metaskip} count=1 \
        #       | dd ibs=${tailskip} skip=1 \
        #       | gzip -dc \
        #       > ${datafile}
        if [ ${iscompressed} -eq 1 ] ; then
                if [ ${istar} -eq 1 ] ; then
                        tail -c +$((${tailskip}+1)) ${src} 2>/dev/null \
                                | head -c $((${metaskip}-${tailskip})) \
                                | tar -xzf -
                else
                        tail -c +$((${tailskip}+1)) ${src} 2>/dev/null \
                                | head -c $((${metaskip}-${tailskip})) \
                                | gzip -dc \
                                > ${datafile}
                fi
        else
                if [ ${istar} -eq 1 ] ; then
                        tail -c +$((${tailskip}+1)) ${src} 2>/dev/null \
                                | head -c $((${metaskip}-${tailskip})) \
                                | tar --no-same-owner -xf -
                else
                        tail -c +$((${tailskip}+1)) ${src} 2>/dev/null \
                                | head -c $((${metaskip}-${tailskip})) \
                                > ${datafile}
                fi
        fi
        true
        #[ -s "${datafile}" ] || die "failure unpacking pdv ('${metaskip}' '${tailskip}' '${datafile}')"
        #assert "failure unpacking pdv ('${metaskip}' '${tailskip}' '${datafile}')"
}

# Unpack those pesky makeself generated files ...
# They're shell scripts with the binary package tagged onto
# the end of the archive.  Loki utilized the format as does
# many other game companies.
#
# Usage: unpack_makeself [file to unpack] [offset]
# - If the file is not specified then unpack will utilize ${A}.
# - If the offset is not specified then we will attempt to extract
#   the proper offset from the script itself.
unpack_makeself() {
        local src="`find_unpackable_file $1`"
        local skip="$2"

        local shrtsrc="`basename ${src}`"
        echo ">>> Unpacking ${shrtsrc} to ${PWD}"
        if [ -z "${skip}" ]
        then
                local ver="`grep -a '#.*Makeself' ${src} | awk '{print $NF}'`"
                local skip=0
                case ${ver} in
                        1.5.*)  # tested 1.5.{3,4,5} ... guessing 1.5.x series is same
                                skip=`grep -a ^skip= ${src} | cut -d= -f2`
                                ;;
                        2.0|2.0.1)
                                skip=`grep -a ^$'\t'tail ${src} | awk '{print $2}' | cut -b2-`
                                ;;
                        2.1.1)
                                skip=`grep -a ^offset= ${src} | awk '{print $2}' | cut -b2-`
                                let skip="skip + 1"
                                ;;
                        2.1.2)
                                skip=`grep -a ^offset= ${src} | awk '{print $3}' | head -n 1`
                                let skip="skip + 1"
                                ;;
                        2.1.3)
                                skip=`grep -a ^offset= ${src} | awk '{print $3}'`
                                let skip="skip + 1"
                                ;;
                        *)
                                eerror "I'm sorry, but I was unable to support the Makeself file."
                                eerror "The version I detected was '${ver}'."
                                eerror "Please file a bug about the file ${shrtsrc} at"
                                eerror "http://bugs.gentoo.org/ so that support can be added."
                                die "makeself version '${ver}' not supported"
                                ;;
                esac
                debug-print "Detected Makeself version ${ver} ... using ${skip} as offset"
        fi

        # lets grab the first few bytes of the file to figure out what kind of archive it is
        local tmpfile="`mymktemp ${T}`"
        tail -n +${skip} ${src} 2>/dev/null | head -c 512 > ${tmpfile}
        local filetype="`file -b ${tmpfile}`"
        case ${filetype} in
                *tar\ archive)
                        tail -n +${skip} ${src} | tar --no-same-owner -xf -
                        ;;
                bzip2*)
                        tail -n +${skip} ${src} | bzip2 -dc | tar --no-same-owner -xf -
                        ;;
                gzip*)
                        tail -n +${skip} ${src} | tar --no-same-owner -xzf -
                        ;;
                compress*)
                        tail -n +${skip} ${src} | gunzip | tar --no-same-owner -xf -
                        ;;
                *)
                        eerror "Unknown filetype \"${filetype}\" ?"
                        false
                        ;;
        esac
        assert "failure unpacking (${filetype}) makeself ${shrtsrc} ('${ver}' +${skip})"
}

# Display a license for user to accept.
#
# Usage: check_license [license]
# - If the file is not specified then ${LICENSE} is used.
check_license() {
        local lic=$1
        if [ -z "${lic}" ] ; then
                lic="${PORTDIR}/licenses/${LICENSE}"
        else
                if [ -e "${PORTDIR}/licenses/${src}" ] ; then
                        lic="${PORTDIR}/licenses/${src}"
                elif [ -e "${PWD}/${src}" ] ; then
                        lic="${PWD}/${src}"
                elif [ -e "${src}" ] ; then
                        lic="${src}"
                fi
        fi
        [ ! -f "${lic}" ] && die "Could not find requested license ${src}"
        local l="`basename ${lic}`"

        # here is where we check for the licenses the user already
        # accepted ... if we don't find a match, we make the user accept
        local alic
        for alic in "${ACCEPT_LICENSE}" ; do
                [ "${alic}" == "*" ] && return 0
                [ "${alic}" == "${l}" ] && return 0
        done

        local licmsg="`mymktemp ${T}`"
        cat << EOF > ${licmsg}
**********************************************************
The following license outlines the terms of use of this
package.  You MUST accept this license for installation to
continue.  When you are done viewing, hit 'q'.  If you
CTRL+C out of this, the install will not run!
**********************************************************

EOF
        cat ${lic} >> ${licmsg}
        ${PAGER:-less} ${licmsg} || die "Could not execute pager (${PAGER}) to accept ${lic}"
        einfon "Do you accept the terms of this license (${l})? [yes/no] "
        read alic
        case ${alic} in
                yes|Yes|y|Y)
                        return 0
                        ;;
                *)
                        echo;echo;echo
                        eerror "You MUST accept the license to continue!  Exiting!"
                        die "Failed to accept license"
                        ;;
        esac
}

# Aquire cd(s) for those lovely cd-based emerges.  Yes, this violates
# the whole 'non-interactive' policy, but damnit I want CD support !
#
# with these cdrom functions we handle all the user interaction and
# standardize everything.  all you have to do is call cdrom_get_cds()
# and when the function returns, you can assume that the cd has been
# found at CDROM_ROOT.
#
# normally the cdrom functions will refer to the cds as 'cd #1', 'cd #2',
# etc...  if you want to give the cds better names, then just export
# the CDROM_NAME_X variables before calling cdrom_get_cds().
#
# for those multi cd ebuilds, see the cdrom_load_next_cd() below.
#
# Usage: cdrom_get_cds <file on cd1> [file on cd2] [file on cd3] [...]
# - this will attempt to locate a cd based upon a file that is on
#   the cd ... the more files you give this function, the more cds
#   the cdrom functions will handle
cdrom_get_cds() {
        # first we figure out how many cds we're dealing with by
        # the # of files they gave us
        local cdcnt=0
        local f=
        for f in "$@" ; do
                cdcnt=$((cdcnt + 1))
                export CDROM_CHECK_${cdcnt}="$f"
        done
        export CDROM_TOTAL_CDS=${cdcnt}
        export CDROM_CURRENT_CD=1

        # now we see if the user gave use CD_ROOT ...
        # if they did, let's just believe them that it's correct
        if [ ! -z "${CD_ROOT}" ] ; then
                export CDROM_ROOT="${CD_ROOT}"
                einfo "Found CD #${CDROM_CURRENT_CD} root at ${CDROM_ROOT}"
                return
        fi
        # do the same for CD_ROOT_X
        if [ ! -z "${CD_ROOT_1}" ] ; then
                local var=
                cdcnt=0
                while [ ${cdcnt} -lt ${CDROM_TOTAL_CDS} ] ; do
                        cdcnt=$((cdcnt + 1))
                        var="CD_ROOT_${cdcnt}"
                        if [ -z "${!var}" ] ; then
                                eerror "You must either use just the CD_ROOT"
                                eerror "or specify ALL the CD_ROOT_X variables."
                                eerror "In this case, you will need ${CDROM_TOTAL_CDS} CD_ROOT_X variables."
                                die "could not locate CD_ROOT_${cdcnt}"
                        fi
                        export CDROM_ROOTS_${cdcnt}="${!var}"
                done
                export CDROM_ROOT=${CDROM_ROOTS_1}
                einfo "Found CD #${CDROM_CURRENT_CD} root at ${CDROM_ROOT}"
                return
        fi

        if [ ${CDROM_TOTAL_CDS} -eq 1 ] ; then
                einfon "This ebuild will need the "
                if [ -z "${CDROM_NAME}" ] ; then
                        echo "cdrom for ${PN}."
                else
                        echo "${CDROM_NAME}."
                fi
                echo
                einfo "If you do not have the CD, but have the data files"
                einfo "mounted somewhere on your filesystem, just export"
                einfo "the variable CD_ROOT so that it points to the"
                einfo "directory containing the files."
                echo
        else
                einfo "This package will need access to ${CDROM_TOTAL_CDS} cds."
                cdcnt=0
                while [ ${cdcnt} -lt ${CDROM_TOTAL_CDS} ] ; do
                        cdcnt=$((cdcnt + 1))
                        var="CDROM_NAME_${cdcnt}"
                        [ ! -z "${!var}" ] && einfo " CD ${cdcnt}: ${!var}"
                done
                echo
                einfo "If you do not have the CDs, but have the data files"
                einfo "mounted somewhere on your filesystem, just export"
                einfo "the following variables so they point to the right place:"
                einfon ""
                cdcnt=0
                while [ ${cdcnt} -lt ${CDROM_TOTAL_CDS} ] ; do
                        cdcnt=$((cdcnt + 1))
                        echo -n " CD_ROOT_${cdcnt}"
                done
                echo
                einfo "Or, if you have all the files in the same place, or"
                einfo "you only have one cdrom, you can export CD_ROOT"
                einfo "and that place will be used as the same data source"
                einfo "for all the CDs."
                echo
        fi
        export CDROM_CURRENT_CD=0
        cdrom_load_next_cd
}

# this is only used when you need access to more than one cd.
# when you have finished using the first cd, just call this function.
# when it returns, CDROM_ROOT will be pointing to the second cd.
# remember, you can only go forward in the cd chain, you can't go back.
cdrom_load_next_cd() {
        export CDROM_CURRENT_CD=$((CDROM_CURRENT_CD + 1))
        local var=

        if [ ! -z "${CD_ROOT}" ] ; then
                einfo "Using same root as before for CD #${CDROM_CURRENT_CD}"
                return
        fi

        unset CDROM_ROOT
        var=CDROM_ROOTS_${CDROM_CURRENT_CD}
        if [ -z "${!var}" ] ; then
                var="CDROM_CHECK_${CDROM_CURRENT_CD}"
                cdrom_locate_file_on_cd ${!var}
        else
                export CDROM_ROOT="${!var}"
        fi

        einfo "Found CD #${CDROM_CURRENT_CD} root at ${CDROM_ROOT}"
}

# this is used internally by the cdrom_get_cds() and cdrom_load_next_cd()
# functions.  this should *never* be called from an ebuild.
# all it does is try to locate a give file on a cd ... if the cd isn't
# found, then a message asking for the user to insert the cdrom will be
# displayed and we'll hang out here until:
# (1) the file is found on a mounted cdrom
# (2) the user hits CTRL+C
cdrom_locate_file_on_cd() {
        while [ -z "${CDROM_ROOT}" ] ; do
                local dir="$(dirname ${@})"
                local file="$(basename ${@})"
                local mline=""
                local showedmsg=0

                for mline in `mount | egrep -e '(iso|cdrom)' | awk '{print $3}'` ; do
                        [ -d "${mline}/${dir}" ] || continue
                        [ ! -z "$(find ${mline}/${dir} -iname ${file} -maxdepth 1)" ] \
                                && export CDROM_ROOT=${mline}
                done

                if [ -z "${CDROM_ROOT}" ] ; then
                        echo
                        if [ ${showedmsg} -eq 0 ] ; then
                                if [ ${CDROM_TOTAL_CDS} -eq 1 ] ; then
                                        if [ -z "${CDROM_NAME}" ] ; then
                                                einfo "Please insert the cdrom for ${PN} now !"
                                        else
                                                einfo "Please insert the ${CDROM_NAME} cdrom now !"
                                        fi
                                else
                                        if [ -z "${CDROM_NAME_1}" ] ; then
                                                einfo "Please insert cd #${CDROM_CURRENT_CD} for ${PN} now !"
                                        else
                                                local var="CDROM_NAME_${CDROM_CURRENT_CD}"
                                                einfo "Please insert+mount the ${!var} cdrom now !"
                                        fi
                                fi
                                showedmsg=1
                        fi
                        einfo "Press return to scan for the cd again"
                        einfo "or hit CTRL+C to abort the emerge."
                        read
                fi
        done
}

# Make sure that LINGUAS only contains languages that 
# a package can support
#
# usage: strip-linguas <allow LINGUAS>
#        strip-linguas -i <directories of .po files>
#        strip-linguas -u <directories of .po files>
#
# The first form allows you to specify a list of LINGUAS.
# The -i builds a list of po files found in all the 
#   directories and uses the intersection of the lists.
# The -u builds a list of po files found in all the 
#   directories and uses the union of the lists.
strip-linguas() {
        local ls newls
        if [ "$1" == "-i" ] || [ "$1" == "-u" ] ; then
                local op="$1"; shift
                ls=" $(find "$1" -name '*.po' -printf '%f ') "; shift
                local d f
                for d in "$@" ; do
                        if [ "${op}" == "-u" ] ; then
                                newls="${ls}"
                        else
                                newls=""
                        fi
                        for f in $(find "$d" -name '*.po' -printf '%f ') ; do
                                if [ "${op}" == "-i" ] ; then
                                        [ "${ls/ ${f} /}" != "${ls}" ] && newls="${newls} ${f}"
                                else
                                        [ "${ls/ ${f} /}" == "${ls}" ] && newls="${newls} ${f}"
                                fi
                        done
                        ls="${newls}"
                done
                ls="${ls//.po}"
        else
                ls="$@"
        fi

        ls=" ${ls} "
        newls=""
        for f in ${LINGUAS} ; do
                if [ "${ls/ ${f} /}" != "${ls}" ] ; then
                        nl="${newls} ${f}"
                else
                        ewarn "Sorry, but ${PN} does not support the ${f} LINGUA"
                fi
        done
        if [ -z "${newls}" ] ; then
                unset LINGUAS
        else
                export LINGUAS="${newls}"
        fi
}