3 # Common functions for build scripts used by various packages
4 # incorporated (e.g., build, bootcd, nodeimage, sliceimage)
6 # Marc E. Fiuczynski <mef@cs.princeton.edu>
7 # Copyright (C) 2007 The Trustees of Princeton University
8 # Thierry Parmentelat <thierry.parmentelat@inria.fr> INRIA
10 # supported distros f8, f10, f12, f14, f16, centos5, sl6
12 # for locating pkgs.py
15 # returns 'Fedora' or 'CentOS' for now
16 function pl_getDistro() {
17 if [ -f "/etc/redhat-release" ] ; then
18 distro=$(awk ' { print $1 } ' /etc/redhat-release)
19 case $distro in Scientific*) distro="SL" ; esac
21 echo "build.common.pl_getDistro-unknown"
28 # returns something like 8, 10, or 5.3
29 function pl_getRelease() {
30 if [ -f "/etc/redhat-release" ] ; then
31 release=$(awk ' { if ($1=="Fedora" && $2=="Core") print $4 ; if (($1=="Fedora" && $2!="Core")||$1=="CentOS") print $3 ; if ($1=="Scientific") print $4 } ' /etc/redhat-release)
33 echo "build.common.pl_getRelease-unknown"
36 # keep only the major number
37 echo "$release" | cut -d. -f1
41 # returns distro shortname, something like 'f8' or 'centos5'
42 function pl_getReleaseName () {
57 releasename=sl$release
60 releasename="unknown-name-for-${pl_DISTRO}-please-edit-build.common"
61 echo 1>&2 "build.common: WARNING - releasename not set for distro=$distro"
69 # yum exclusions are now defined in yumexclude.pkgs
70 # so they can now depend both on the linux distro and the pl distro
71 function pl_yumexclude () {
76 # search for file "yumexclude.pkgs"
77 yumexclude_file=$(pl_locateDistroFile $builddir $pldistro "yumexclude.pkgs")
79 # check if pkgs.py is in PATH
80 type -p pkgs.py >& /dev/null || export PATH=$builddir:$PATH
83 pl_parsePkgs $keyword $fcdistro $pldistro $yumexclude_file || \
84 { echo pl_yumexclude failed with fcdistro=$fcdistro and pldistro=$pldistro; return 1 ; }
87 # <> fcdistro pldistro builddir
88 # node side : use the 'nodeyumexclude' keywork in yumexclude.pkgs
89 function pl_nodeyumexclude () { pl_yumexclude 'nodeyumexclude' "$@" ; }
90 # server side : use the 'plcyumexclude' keywork in yumexclude.pkgs
91 function pl_plcyumexclude () { pl_yumexclude 'plcyumexclude' "$@" ; }
94 # figure out which redhat distro we are using (fedora, centos, redhat)
95 pl_DISTRO=$(pl_getDistro)
97 # select basearch of the host devel environment - protected for macos for local tests
98 # try arch for testing stuff on a mac
99 pl_DISTRO_ARCH=$(uname -i 2>/dev/null || arch 2> /dev/null || echo unknownarch)
101 # the release number (plain number)
102 pl_DISTRO_RELEASE=$(pl_getRelease)
104 # the release name - something like 'f8' or 'sl6'
105 pl_DISTRO_NAME=$(pl_getReleaseName $pl_DISTRO $pl_DISTRO_RELEASE)
107 # get path to appropriate yumgroups.xml file
108 # Thierry: quick & dirty improvement
109 # this file is updated by the toplevel build, from the .pkgs files
110 pl_DISTRO_YUMGROUPS="../../../RPMS/yumgroups.xml"
112 function pl_process_fedora_options () {
115 while getopts "l:r:a:h" opt ; do
118 pl_DISTRO_URL=$OPTARG
119 let shiftcount=$shiftcount+2
122 pl_DISTRO_RELEASE=$OPTARG
123 let shiftcount=$shiftcount+2
126 pl_DISTRO_ARCH=$OPTARG
127 let shiftcount=$shiftcount+2
130 echo "Usage: $0 [OPTION]..."
131 echo " -l url distro mirror location (default: $pl_DISTRO_URL)"
132 echo " -r release distro release number (default: $pl_DISTRO_RELEASE)"
133 echo " -a arch distro architecture (default: $pl_DISTRO_ARCH)"
134 echo "where distro can be either fedora, centos, or redhat"
135 echo " -h This message"
143 ######################################## handling a root image
144 function pl_root_rpm_macros () {
146 %_install_langs C:en_US:en
147 %_netsharedpath /proc:/dev/pts:/usr/share/info
149 %__file_context_path /dev/null
153 function pl_root_makedevs() {
155 # Clean ${vroot}/dev, but only when ${vroot}!=""
156 [ -n $vroot ] && rm -rf $vroot/dev
159 mknod -m 666 $vroot/dev/null c 1 3
160 mknod -m 666 $vroot/dev/zero c 1 5
161 mknod -m 666 $vroot/dev/full c 1 7
162 mknod -m 644 $vroot/dev/random c 1 8
163 mknod -m 644 $vroot/dev/urandom c 1 9
164 mknod -m 666 $vroot/dev/tty c 5 0
165 mknod -m 666 $vroot/dev/ptmx c 5 2
166 # For bash command substitution
167 ln -nsf ../proc/self/fd $vroot/dev/fd
169 # For df and linuxconf
170 touch $vroot/dev/hdv1
173 mkdir -p $vroot/dev/pts
176 mkdir -p $vroot/dev/shm
179 mkdir -p $vroot/dev/net
180 mknod -m 600 $vroot/dev/net/tun c 10 200
182 # For mkinitrd (in case a kernel is being installed)
183 # As well as for loop back mounting within a vm.
184 for i in $(seq 0 255) ; do
185 mknod -m 640 $vroot/dev/loop$i b 7 $i
189 function mkfedora_usage() {
190 echo "Usage: pl_root_mkfedora [OPTION]... basedir pldistro pkgsfile(s)"
191 echo " -l url Fedora mirror location."
192 echo " Defaults are searched in <pldistro>.mirrors"
193 echo " -v Be verbose"
194 echo " -h This message"
195 echo " target selection (defaults based on current build VM context)"
196 echo " -r release Fedora release number (default: $releasever)"
197 echo " -a arch Fedora architecture (default: $basearch)"
201 function pl_root_mkfedora () {
203 echo "* Entering pl_root_mkfedora" "$@"
205 if [ $UID -ne 0 ] ; then
206 echo "Error: You must run this script as root."
213 # Release and architecture to install : defaults to current vm settings or previously parsed fedora_options
214 releasever=$pl_DISTRO_RELEASE
215 basearch=$pl_DISTRO_ARCH
218 while getopts "vh" opt ; do
220 v) verbose=1; set -x ;;
221 h|*) mkfedora_usage ;;
225 shift $(($OPTIND - 1))
226 [[ "$#" -lt 3 ]] && mkfedora_usage
230 vroot=$(cd $vroot && pwd -P)
231 [ -d $vroot ] || mkfedora_usage
234 # parse pkgsfile and add to local vars
235 fcdistro=${pl_DISTRO_NAME}
236 pkgs_packages=$(pl_parsePkgs package $fcdistro $pldistro $pkgsfile)
237 pkgs_groups=$(pl_parsePkgs group $fcdistro $pldistro $pkgsfile)
238 # what can get trashed to save space
239 pkgs_junk=$(pl_parsePkgs junk $fcdistro $pldistro $pkgsfile)
241 pkgs_precious=$(pl_parsePkgs precious $fcdistro $pldistro $pkgsfile)
242 # formerly related to mkfedora -k : packages to take from our own build
243 # and thus need be excluded frem the stock repos
244 # locate builddir by looking for pkgs.py
245 builddir=$(dirname $(type -p pkgs.py))
246 SUBST_NODEYUMEXCLUDE=$(pl_nodeyumexclude $fcdistro $pldistro $builddir)
247 pkgs_yumexclude=$(pl_parsePkgs yumexclude $fcdistro $pldistro $pkgsfile | sed -e s,@NODEYUMEXCLUDE@,"$SUBST_NODEYUMEXCLUDE",)
248 # get mirrors if not specified with -l
249 if [ -z "$mirrors" ] ; then
250 mirrorsfile=$(pl_locateDistroFile ../build/ $pldistro "$pldistro.mirrors")
251 mirrors=$(pl_parsePkgs mirror $fcdistro $pldistro $mirrorsfile)
255 [ -n "$pkgs_yumexclude" ] && yumexclude_line="exclude=$pkgs_yumexclude"
257 echo "$0: candidate mirrors"
258 for mirror in $mirrors ; do
259 echo "* candidate mirror $mirror"
262 # the repo part of the final yum.conf
263 yum_conf_repos=$vroot/xxxmkfedora-repos.confxxx
264 if ! yumconf_mirrors $yum_conf_repos ../build/ $fcdistro "$yumexclude_line" $mirrors ; then
265 echo xxx -- error ; return 1
268 # Do not tolerate errors
271 public_gpg_key=$(yumconf_gpgkey $yum_conf_repos)
273 ## make rpms ignore installing stuff to special fs entries like /proc
274 # Because of https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=52725
275 # you have to use at least one language beside 'C'
276 # Prevent all locales from being installed in reference image
277 mkdir -p $vroot/etc/rpm
278 pl_root_rpm_macros > $vroot/etc/rpm/macros
280 # Trick rpm and yum, who read the real root /etc/rpm/macros file
281 # rather than the one installed in the reference image, despite what
282 # you might expect the --root and --installroot options to mean. Both
283 # programs always read $HOME/.rpmmacros.
284 export HOME=$vroot/tmp
286 pl_root_rpm_macros > $vroot/tmp/.rpmmacros
288 function mkfedora_cleanup () {
289 umount -l $vroot/proc
290 umount -l $vroot/dev/shm
291 umount -l $vroot/dev/pts
294 # Clean up before exiting if anything goes wrong
295 trap "mkfedora_cleanup" ERR INT
297 # Mount in reference image
298 mount -t devpts none $vroot/dev/pts
299 mount -t tmpfs none $vroot/dev/shm
301 mount -t proc none $vroot/proc
303 # Create a /var/lib dirs for yum & rpm
304 mkdir -p $vroot/var/lib/yum
305 mkdir -p $vroot/var/lib/rpm
306 mkdir -p $vroot/usr/share/info
308 # Create a dummy /etc/fstab in reference image
310 cat >$vroot/etc/fstab <<EOF
311 # This fake fstab exists only to please df and linuxconf.
312 /dev/hdv1 / ext2 defaults 1 1
314 cp $vroot/etc/fstab $vroot/etc/mtab
316 # Necessary for some scripts
317 mkdir -p $vroot/etc/sysconfig
318 echo "NETWORKING=yes" > $vroot/etc/sysconfig/network
320 # Initialize RPM database in reference image
321 mkdir -p $vroot/var/lib/rpm
322 rpm --root $vroot --initdb
323 rpm --root $vroot --import $public_gpg_key
325 # Initialize yum in reference image
326 mkdir -p $vroot/var/cache/yum $vroot/var/log
328 # yum.conf is for building only - store in different location than /etc/yum.conf
329 yum_conf=$vroot/etc/mkfedora-yum.conf
330 cat > $yum_conf <<EOF
332 cachedir=/var/cache/yum
334 logfile=/var/log/yum.log
337 distroverpkg=redhat-release
343 # Prevent yum-2.4 from loading additional repository definitions
344 # (e.g., from /etc/yum.repos.d/)
348 cat $yum_conf_repos >> $yum_conf
350 # If we are being built as part of an automated RPM build, solve the
351 # bootstrap problem by including any just built packages in the yum
352 # configuration. This cooperates with the PlanetLab build system.
353 if [ -n "$RPM_BUILD_DIR" ] ; then
354 RPM_RPMS_DIR=$(cd $(dirname $RPM_BUILD_DIR)/RPMS && pwd -P)
355 # If run under sudo, allow user to delete the headers/ and
356 # repodata/ directories.
357 if [ -n "$SUDO_USER" ] ; then
358 chown -R $SUDO_USER $RPM_RPMS_DIR
360 cat >> $yum_conf <<EOF
363 name=Building - $basearch - $RPM_RPMS_DIR/
364 baseurl=file://$RPM_RPMS_DIR/
368 echo "========== Dumping $yum_conf"
370 echo "========== EndDump $yum_conf"
373 # yum --help | grep verbose &> /dev/null && yum_options="$yum_options --verbose"
374 yum_options="$yum_options -y"
375 yum_options="$yum_options -c $yum_conf"
376 yum_options="$yum_options --installroot=$vroot"
378 # glibc must be specified explicitly for the correct arch to be
380 echo "* Installing glibc"
381 # ignore yum's return code that is basically undefined
382 yum $yum_options install glibc || :
385 if [ -n "$pkgs_packages" ] ; then
386 echo "* Installing optional packages" $pkgs_packages
387 # ignore yum's return code that is basically undefined
388 echo "* Install options" $vroot $yum_options
389 yum $yum_options install $pkgs_packages || :
390 if ! rpm --root $vroot -q $pkgs_packages >/dev/null ; then
391 echo "* Warning: Missing packages"
392 rpm --root $vroot -q $pkgs_packages | grep "not installed"
396 if [ -n "$pkgs_groups" ] ; then
397 ## call yum sequentially to get finer-grained info on dependencies
398 for group_plus in $pkgs_groups ; do
399 group=$(echo $group_plus | sed -e "s,+++, ,g")
400 echo "* Installing optional group $group"
401 # ignore yum's return code that is basically undefined
402 yum $yum_options groupinstall "$group" || :
406 # formerly in bootcd/prep.sh : to optimize footprint
407 if [ -n "$pkgs_junk" ] ; then
408 echo "* Removing unnecessary junk"
410 # Save precious files
411 [ -n "$pkgs_precious" ] && tar --ignore-failed-read -cpf precious.tar $pkgs_precious
412 # Remove unnecessary junk
413 [ -n "$pkgs_junk" ] && rm -rf $pkgs_junk
414 # Restore precious files
415 [ -n "$pkgs_precious" ] && tar -xpf precious.tar && rm -f precious.tar
422 # NOTE: this hack is for Fedora >= 12.
423 # if kernel-debug is installed, clean it up
424 # we link to our version of kernel/initrd and clean up
425 # kernel-debug manually
426 if rpm --root $vroot --quiet -q kernel-debug ; then
427 echo "* Cleaning up kernel-debug - (workaround for f12)"
429 rm -rf kernel-boot kernel-bootsmp initrd-boot initrd-bootsmp
430 ln -s vmlinuz-*${pldistro}* kernel-boot
431 ln -s vmlinuz-*${pldistro}* kernel-bootsmp
432 ln -s initrd-*${pldistro}* initrd-boot
433 ln -s initrd-*${pldistro}* initrd-bootsmp
434 rpm --root $vroot --nodeps -e kernel-debug || :
438 # ignore yum's return code that is basically undefined
439 yum $yum_options clean all || :
442 rm -f $vroot/var/lib/rpm/__db*
444 # Set time zone to UTC
445 if [ -f $vroot/usr/share/zoneinfo/UTC -a -f $vroot/etc/localtime ] ; then
446 rm -f $vroot/etc/localtime
447 ln -s /usr/share/zoneinfo/UTC $vroot/etc/localtime
450 echo "Dumping current list of rpms in /etc/mkfedora-rpms.txt"
451 chroot $vroot rpm -aq | sort > $vroot/etc/mkfedora-rpms.txt
453 # remove trap handler, as we are about to call it directly.
462 function pl_root_tune_image () {
465 # Disable all services in reference image
466 chroot $root sh -c "/sbin/chkconfig --list | awk '{ print \$1 }' | xargs -i /sbin/chkconfig {} off"
468 # FC2 minilogd starts up during shutdown and makes unmounting
469 # impossible. Just get rid of it.
470 rm -f $root/sbin/minilogd
471 ln -nsf /bin/true $root/sbin/minilogd
473 # This tells the Boot Manager that it is okay to update
474 # /etc/resolv.conf and /etc/hosts whenever the network configuration
475 # changes. Users are free to delete this file.
476 touch $root/etc/AUTO_UPDATE_NET_FILES
479 # Move specified directories out of a src tree into a dst tree, and
480 # then for each moved directory create a symlink in src to dst.
481 function pl_move_dirs() {
488 for datadir in "$@" ; do
489 mkdir -p ${data}${datadir}
490 if [ -d ${root}/${datadir} -a ! -h ${root}/${datadir} ] ; then
491 (cd ${root} && find ./${datadir} | cpio -p -d -u ../${data}/)
493 rm -rf ${root}/${datadir}
494 mkdir -p $(dirname ${root}/${datadir})
495 ln -nsf ${store}/${datadir} ${root}/${datadir}
499 # Construct an image file from given some directory
500 # XXX in the future maybe use livecdtools?
501 function pl_make_image() {
506 # Leave about 100 MB free space and allow for about 20% inode overhead
507 bytes=$((($(du -sb $root | cut -f1) + $extraspace) * 120 / 100))
509 blocks=$(($bytes / $bs))
510 dd bs=$bs count=$blocks if=/dev/zero of=$image
511 mkfs.ext3 -b $bs -j -F $image
513 # Temporarily mount it
514 tmp=$(mktemp -d tmp.XXXXXX)
515 mount -o loop $image $tmp
516 trap "umount $tmp; rmdir $tmp" ERR INT
519 (cd $root && tar cpf - .) | (cd $tmp && tar xpf -)
527 # Fix permissions on tmp directories
528 function pl_fixtmp_permissions() {
530 chmod 1777 $root/tmp $root/usr/tmp $root/var/tmp
533 function pl_fixdirs() {
536 for datadir in datadirs ; do
537 if [ -h ${root}/${datadir} ] ; then
538 rm -f ${root}/${datadir}
539 mkdir -p ${root}/${datadir}
544 ########## .pkgs format
545 # Usage: pl_parsePkgs keyword [-a arch] fcdistro pldistro pkgs-file[..s]
546 # pkgs.py should be found in PATH, like this file build.common
547 function pl_parsePkgs () {
548 target_arch=$pl_DISTRO_ARCH
550 [ "$1" == "-a" ] && { shift; target_arch="$1"; shift; }
554 echo 1>&2 "pl_parsePkgs: using -a $target_arch -f $fcdistro -d $pldistro $keyword $@"
555 pkgs.py -a $target_arch -f $fcdistro -d $pldistro $keyword "$@"
557 # usage: pl_getPackages [-a arch] fcdistro pldistro pkg-file[..s]
558 function pl_getPackages() { pl_parsePkgs package "$@" ; }
559 function pl_getGroups() { pl_parsePkgs group "$@" ; }
561 ##############################
562 ### temporary - only for checking the new python version
563 # for a given keyword like 'package' :
564 # we support fcdistro-dependant format, for tokens (pkgname) without whitespace
566 # package: pkg1 .. pkgn
567 # package+f8: pkg1 .. pkgn
568 # package-f8: pkg1 .. pkgn
570 # values can contain @arch@, @fcdistro@ or @pldistro@ that are replaced with the current values
572 # the reason for the -a option is for when we build the build vm itself; in this case
573 # pl_DISTRO_ARCH is the one we obtain from the root context, and that's wrong
574 # specify -sa arch AFTER keyword, so as to keep pl_getPackages and pl_getGroups simple
576 function pl_parsePkgs_old () {
578 target_arch=$pl_DISTRO_ARCH
580 [ "$1" == "-a" ] && { shift; target_arch="$1"; shift; }
583 # remaining arguments are paths to the pkgs files
585 # grab regular descriptions
586 all=$(grep -v '^#' "$@" | grep --regexp="^${keyword}:" | sed -e "s,${keyword}:,,")
588 add=$(grep -v '^#' "$@" | grep --regexp="^${keyword}+${fcdistro}:" | sed -e "s,${keyword}+${fcdistro}:,,")
590 sub=$(grep -v '^#' "$@" | grep --regexp="^${keyword}-${fcdistro}:" | sed -e "s,${keyword}-${fcdistro}:,,")
592 for rpm in $all $add; do
593 for exclude in $sub; do
594 [ "$rpm" = "$exclude" ] && continue 2
596 echo "${rpm} " | sed -e "s,@arch@,${target_arch},g" -e "s,@fcdistro@,$fcdistro,g" -e "s,@pldistro@,$pldistro,g"
600 ##############################
602 # locates a pldistro-dependant file
603 # tries first in build/<pldistro>/, then in build/planetlab/
604 function pl_locateDistroFile () {
610 # if config dir is missing but a .svnpath or a .gitpath exists, use it to extract the config dir
611 configdir="$builddir/config.${pldistro}"
612 if [ ! -d $configdir ] ; then
613 if [ -f "${configdir}.svnpath" -o -f "${configdir}.gitpath" ] ; then
614 echo 1>&2 "Invoking make to extract remote config.${pldistro}"
615 make 1>&2 --silent --no-print-directory -C $builddir stage1=true config.${pldistro}
619 paths="$builddir/config.$pldistro/$pkgsfile $builddir/config.planetlab/$pkgsfile"
620 for path in $paths; do
621 if [ -f $path ] ; then
626 if [ -z "$pkgspath" ] ; then
627 echo 1>&2 "pl_locateDistroFile - in $(pwd) : cannot locate $pkgsfile in $builddir"
628 echo 1>&2 "candidates were $paths"
629 echo "not-found-by-pl_locateDistroFile"
632 echo 1>&2 "pl_locateDistroFile: using $pkgspath"
638 function yumgroups_from_pkgs () {
644 sedargs="-e s,@FCDISTRO@,$fcdistro,g"
647 <?xml version="1.0"?>
648 <!DOCTYPE comps PUBLIC "-//Red Hat, Inc.//DTD Comps info//EN" "comps.dtd">
652 for pkgsname in $pkgsnames; do
653 pkgsfile=$(pl_locateDistroFile $builddir $pldistro $pkgsname)
654 packages=$(pl_getPackages $fcdistro $pldistro $pkgsfile)
656 groupname=$(pkgs.py groupname $pkgsfile | sed $sedargs)
657 groupdesc=$(pkgs.py groupdesc $pkgsfile | sed $sedargs)
659 if [ -z "$groupname" -o -z "$groupdesc" ] ; then
660 echo "Cannot find groupname: and groupdesc: in $pkgsfile -- skipped" 1>&2
664 cat << __group_header
666 <id>$(echo $groupname|tr A-Z a-z)</id>
667 <name>$groupname</name>
668 <description>$groupdesc</description>
669 <uservisible>true</uservisible>
672 for package in $packages; do
673 echo "<packagereq type=\"mandatory\">$package</packagereq>"
675 cat << __group_footer
686 function build_fetch () {
687 curl --fail --silent --max-time 60 --output /dev/null "$1"
690 # tries to compute a valid yum.conf for that pldistro from the template in mirroring/
691 # returns 0 and writes <dest_yumconf> on success
692 # returns 1 on failure, in which case <dest_yumconf> is deleted
693 function yumconf_mirrors () {
694 dest_yumconf=$1; shift
697 yumexclude_line="$1" ; shift
700 template=$builddir/mirroring/$fcdistro/yum.repos.d/building.repo.in
702 if [ ! -f $template ] ; then
703 echo "yumconf_mirrors: cannot locate template $template"
708 for mirror in $mirrors; do
709 if yumconf_mirror $dest_yumconf $template "$yumexclude_line" $mirror; then
713 echo 'yumconf_mirrors in build.common : ran out of mirrors -- BAILING OUT'
718 # computes a yum.conf from the template, and checks that all baseurl defined in there are valid repos
719 # returns 0 on success and 1 on failure
720 function yumconf_mirror () {
721 dest_yumconf=$1; shift
723 yumexclude_line="$1" ; shift
726 sed -e "s,@MIRRORURL@,$mirror,g" \
728 $yumexclude_line" $template > $dest_yumconf
730 # capture all lines defining baseurl
731 baseurl_defs=$(grep '^baseurl=' $dest_yumconf)
732 if [ -z "$baseurl_defs" ] ; then
736 for baseurl_def in $baseurl_defs; do
737 baseurl=$(echo $baseurl_def | sed \
739 -e 's,$basearch,'"$pl_DISTRO_ARCH",g)
740 repomd=$baseurl/repodata/repomd.xml
742 echo "* Trying to fetch $repomd"
743 if ! build_fetch $repomd ; then
744 echo "* Failed to fetch $repomd"
748 echo "* Selected mirror $mirror"
752 # from a yum.conf as generated above, computes the gpgkey urls
753 function yumconf_gpgkey () {
754 dest_yumconf=$1; shift
756 values=$(grep -h '^gpgkey=' $dest_yumconf | sed -e s,gpgkey=,, | sed -e 's,$basearch,'"$pl_DISTRO_ARCH",g | sed -e 's, ,\n,g' | sort | uniq | xargs)
757 [ -n "$values" ] || return 1
762 # patches a yum conf to insert an exclude line in each declared repo
763 function yumconf_exclude () {
765 yumexclude_line="$1" ; shift
767 sed -i -e "/#baseurl=.*$/i\\
768 $yumexclude_line" $repo