# Copyright 1999-2000 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License, v2 or later
# Author Dan Armak <danarmak@gentoo.org>
# $Header: /var/cvsroot/gentoo-x86/eclass/kde.eclass,v 1.22 2001/12/23 21:35:15 danarmak Exp $
# The kde eclass is inherited by all kde-* eclasses. Few ebuilds inherit straight from here.
inherit autoconf base || die
ECLASS=kde

DESCRIPTION="Based on the $ECLASS eclass"

HOMEPAGE="http://www.kde.org/"

DEPEND="$DEPEND kde-base/kdelibs
				objprelink? ( >=dev-util/objprelink-0-r1 )"
RDEPEND="$RDEPEND kde-base/kdelibs"

# resolution function: kde version -> qt version
# wish we had something like python dictionaries here :-)
# gets kde version in $1 and returns matching qt version in $matching_qt_ver
# if none matches, returns -1
qtver-from-kdever() {

	debug-print-function $FUNCNAME $*

	case "$1" in
		2_* | 2 | 2.0*)		matching_qt_ver=2;;
		2.1*)			matching_qt_ver=2.1;;
		2.2*)			matching_qt_ver=2.3.1;;
		3_* | 3 | 3.0*)		matching_qt_ver=3.0.1;;
		*)				matching_qt_ver=-1
	esac

	debug-print "$FUNCNAME: resolved KDE version $1 to QT version $matching_qt_ver"

}

kde-objprelink-patch() {
	debug-print-function $FUNCNAME $*
	if [ "`use objprelink`" ]; then
	    cd ${S} || die
	    patch -p0 < /usr/share/objprelink/kde-admin-acinclude.patch || die
	    patched=false
	    
	    for x in Makefile.cvs admin/Makefile.common
	    do
		if ! $patched
		then
		    if [ -f $x ]
		    then
			echo "patching file $x (kde-objprelink-patch)" && make -f $x && patched=true || die
		    fi
		fi
	    done

	    $patched || echo "??? Warning: kde-objprelink-patch: patch not applied, makefile not found"
	
	fi

}

kde_src_compile() {

    debug-print-function $FUNCNAME $*
    [ -z "$1" ] && kde_src_compile all

    while [ "$1" ]; do

	case $1 in
		myconf)
			debug-print-section myconf
			myconf="$myconf --host=${CHOST} --with-x --enable-mitshm --with-xinerama --prefix=/usr --with-qt-dir=${QTDIR}"
			use qtmt 	&& myconf="$myconf --enable-mt"
			use objprelink	&& myconf="$myconf --enable-objprelink" || myconf="$myconf --disable-objprelink"
			debug-print "$FUNCNAME: myconf: set to ${myconf}"
			;;
		configure)
			debug-print-section configure
			debug-print "$FUNCNAME::configure: myconf=$myconf"
			./configure ${myconf} || die
			;;
		make)
			debug-print-section make
			LIBRARY_PATH=${LIBRARY_PATH}:${QTDIR}/lib make || die
			;;
		all)
			debug-print-section all
			kde_src_compile myconf configure make
			;;
	esac

    shift
    done

}

kde_src_install() {

	debug-print-function $FUNCNAME $*
    [ -z "$1" ] && kde_src_install all

    while [ "$1" ]; do

	case $1 in
	    make)
			debug-print-section make
			make install DESTDIR=${D} destdir=${D} || die
			;;
	    dodoc)
			debug-print-section dodoc
			dodoc AUTHORS ChangeLog README* COPYING NEWS TODO
			;;
	    all)
			debug-print-section all
			kde_src_install make dodoc
			;;
	esac

    shift
    done

}

EXPORT_FUNCTIONS src_compile src_install

# This used to be depend.eclass. At some point I realized it might as well be called kd-depend.eclass. And then
# because functions fom there needed functions from here and vice versa I merged them.

#---------------

# This provides the need-kde and need-qt functions, which handle setting KDEDIR
# and QTDIR for the multi-qt and multi-kdelibs schemes. The functions set-kdedir and
# set-qtdir are called from kde.eclass; the need-* functions from the ebuild.

# A helper function that takes a dot-separated string and builds an array from its parts.
# We need this for version comparisons becaus bash can't compare e.g. 2.2.2 and 2.12.3.
# array created is called version_parts
# 1st parameter: string to separate
# 2nd parameter: separator char(s) (optional, defaults to "._" dot and underscore)
# 3rd parameter: name of array to create (optional, defaults to "version")
# 4th parameter: minimal number of version parts (optional, defaults to 0). If after
# separation this number is not reached, the necessary amount of parts is added with value 0.
# This is a very ugly kludge as there is also a 0th element of the array which isn't counted on
# purpose, because that's how we want it to be. In short, you shouldn't use this outside depend.eclass :-)
separate-string() {

    debug-print-function $FUNCNAME $*

    [ -n "$3" ] && arr="$3" || arr="version"
    [ -n "$2" ] && sep="$2" || sep="._"
    [ -n "$4" ] && min="$4" || min=0
    IFSBACKUP=$IFS
    IFS=$sep

    local index
    index=0
    for x in $1
    do
	eval $arr[$index]=$x
	debug-print "$FUNCNAME: adding to array, index = $index, value = $x"
	let "index+=1"
    done

    while [ "$index" -le "$min" ] # <= not < because $index ends up being larger by 1 than the amount of elements in the array
    do
	eval $arr[$index]=0
	debug-print "$FUNCNAME: adding to array, index = $index, value = 0"
	let "index+=1"
    done

    debug-print

    IFS=$IFSBACKUP

}

# The version comparison/selection function. Uses separate-string() to break down
# version numbers into their components and selects the one to use. Assumes *some*
# good version is installed, as we add the requirment to DEPEND/RDEPEND. Is used for
# both qt and kdelibs.
# 1st parameter: required (minimal) version
# 2nd parameter: list of space-separated versions to choose from
select-version() {

    debug-print-function $FUNCNAME $*

    # 2d arrays in bash are troublesome, so we do this:
    # sanity check - make sure we've got all parameters
    if [ $# != 2 ]; then
	echo "!!! Error: $FUNCNAME did not get all required parameters.
!!! You can check what it did get with eclass debug output."
	exit 1
    fi

    # to facilitate handling of release types (alpha,beta,pre,rc) we replace them with numbers
    local needed list
    needed="`echo $1 | sed -e 's/alpha/-4./' \
		       -e 's/beta/-3./' \
		       -e 's/pre/-2./' \
		       -e 's/rc/-1./' `"
    list="`echo $2 | sed -e 's/alpha/-4./' \
		       -e 's/beta/-3./' \
		       -e 's/pre/-2./' \
		       -e 's/rc/-1./' `"

    # because we're going to separate each version number into its components,
    # once we've selected one it'll be difficult to "unseparate" it, recreatg e.g.
    # beta/alpha/underscores etc. So we prepend a ser. number to each. Since we
    # don't know the length/number of parts in a version number at this stage,
    # we can't append the index but must prepend it. Then it'll live as part 0
    # of the separated version number, while we'll deal with parts 1 through 5.
    local index templist
    index=1
    templist="$list"
    list=""
    for x in $templist; do
	list="${list} ${index}.${x}"
	let "index+=1"
    done

    debug-print "$FUNCNAME: after parsing, list = $list"

    # parse required version number $1 -> array "req"
    separate-string 0.$1 ._ req 5
    debug-print "$FUNCNAME: for \$1 = $1, we've got back a req with contents = ${req[*]}"

    # init array "best" to major,-1,-1 so that any alternative is better (major is
    # major version number of needed). give it a nonexistent index.
    declare -a best
    best=( 0 ${req[1]} -10 -10 -10 -10 -10 )

    # for each version number in $list:
    local x ver
    for ver in $list
    do
	# parse version number -> array "cur"
	separate-string $ver ._ cur 5
	debug-print "$FUNCNAME: for ver = $ver, we've got back a cur with contents = ${cur[*]}"

	# check if it satisfies the requirements. if not, pass to the next x.
	# 1. major version numer is = to that of req
	[ ${cur[1]} -eq ${req[1]} ] || continue

	# 2. check whether minor version and revision of cur are >= those of best
	# if = continue checking (lower levels), if > select right away, if < break
	# we typically have upto 5 levels: major, minor, revision,
	# release type (alpha, beta...), release type number (beta1, beta2...)
	for x in 2 3 4 5
	do
	    debug-print "$FUNCNAME: will compare place $x. in cur: ${cur[$x]}, in best: ${best[$x]}"
	    if [ "${cur[$x]}" -gt "${best[$x]}" ]; then
		debug-print "$FUNCNAME: comparison result is >"
		# set best to equal cur
		best=( "${cur[@]}" )
		continue 2 # next iteration of outer loop
	    elif [ "${cur[$x]}" -lt "${best[$x]}" ]; then
		debug-print "$FUNCNAME: comparison result is <"
		continue 2 # next iteration of outer loop
	    # this is all implicitly done
	    else # [ ${cur[2]} -eq ${best[2]} ]
		debug-print "$FUNCNAME: comparison result is ="
	    #	# see if we've reached the last iteration
	    #	if [ "$x" = "5" ]; then
	    #	# this is exactly the version we need, i.e. req = cur.
	    #	# so we don't have to do anything at all :-)
	    #	fi
	    # continue # next iteration of this loop
	    #fi
	fi
	done

    done

    # find the coresponding "unseparated" version number in the orig. $list using
    # the indexes we planted
    local result count
    index=${best[0]}
    debug-print "$FUNCNAME: best has index number $index \
compare with $list \
search for it in $2"
    count=1
    for x in $2; do
	if [ "$count" = "$index" ]; then
	    result=$x
	    break
	fi
	let "count+=1"
    done

    if [ -z "$result" ]; then
	# we're in serious troble
	echo "!!! Error: $FUNCNAME could not find/select a satisfying version number!
!!! If this surprises you, it shouldn't have happened. If you're using
!!! the prerelease kde3 ebuilds make sure you have the latest kdelibs3
!!! and qt3 emerged. If you do have them, or don't know what i'm talking
!!! about, report this as a bug."
	exit 1
    fi

    # strip all spaces
    result="${result// }"

    # return, tired but satisfied
    selected_version=$result
    debug-print "$FUNCNAME: final result: returning selected_version = $selected_version"

}

set-kdedir() {

	debug-print-function $FUNCNAME $*

	biglist="`ls -d1 /usr/lib/kdelibs-*`"
	debug-print "$FUNCNAME: \$biglist:
${biglist}"

	# filter $biglist to create $list
	list=""
	for x in $biglist; do
	    # strip path, leave version number
	    x="`echo $x | sed -e 's:/usr/lib/kdelibs-::'`"
	    list="$list $x"
	done

	debug-print "$FUNCNAME: filtered \$biglist and got this \$list:
$list"

	# select version
	select-version $KDEVER "$list"

	# check and set
	if [ -z "$selected_version" ]; then
	    echo "!!! $FUNCNAME: no match returned by select-version! Please report."
	else
	    export KDEDIR="/usr/lib/kdelibs-$selected_version"
	fi

}

need-kde() {

	KDEVER="$1"
	debug-print-function $FUNCNAME $*
	debug-print "$FUNCNAME: version number is $KDEVER"

	separate-string $KDEVER ._ KDEVER 5

	KDEMAJORVER=KDEVER[0]

	newdepend ">=kde-base/kdelibs-$KDEVER"

	set-kdedir

	qtver-from-kdever $KDEVER
	need-qt $matching_qt_ver

}

set-qtdir() {

	debug-print-function $FUNCNAME $*

	biglist="`ls -d1 /usr/lib/qt-x11-*`"
	debug-print "$FUNCNAME: \$biglist:
${biglist}"

	# filter $biglist to create $list
	list=""
	for x in $biglist; do
	    # strip path, leave version number
	    x="`echo $x | sed -e 's:/usr/lib/qt-x11-::'`"
	    list="$list $x"
	done

	debug-print "$FUNCNAME: filtered \$biglist and got this \$list:
$list"

	# select version
	select-version $QTVER "$list"

	# check and set
	if [ -z "$selected_version" ]; then
	    echo "!!! $FUNCNAME: no match returned by select-version! Please report."
	else
	    export QTDIR="/usr/lib/qt-x11-$selected_version"
	fi

}

need-qt() {

	QTVER="$1"
	debug-print-function $FUNCNAME $*
	debug-print "$FUNCNAME: version number is $QTVER"

	separate-string $QTVER ._ QTVER 5

	QTMAJORVER=QTVER[0]

	newdepend ">=x11-libs/qt-x11-$QTVER"

	set-qtdir

}