One thing that has been missing from debian for easy cross-building is a simple way to download non-native packages in order to feed them to dpkg-cross. I got very bored of having to run up a browser and look at packages.debian.org for the right suite and arch to find the actual deb name and package version and then use wget to get that.
It irritated me one final time tonight so I wrote a script cross-get which lets you do cross-get <package> [arch] [suite] [mirror] and it will download the relevant deb. It maitains a set of apt and dpkg cross-status info in /var/lib/apt-cross and /var/lib/dpkg-cross, so that your notive databases are not messed-up. There is plenty of room for improvement (it should take defaults from /etc/dpkg-cross/ config), it could have much smarter command-line processing etc. Perhaps it should be written in perl and be combined into dpkg-cross. If it got a bit smarter and could check and optionally get dependencies too then it could become apt-cross - that is a miuch bigger job, I think. So I hereby preseent v0.1 which solves my basic problem, and thus should be useful to others for that reason. I'll check it into debian-embedded svn tomorrow. Wookey -- Aleph One Ltd, Bottisham, CAMBRIDGE, CB5 9BA, UK Tel +44 (0) 1223 811679 work: http://www.aleph1.co.uk/ play: http://wookware.org/
#!/bin/sh -e #maybe this would be better as a perl script? if [ "" = "$1" ]; then echo -e "you must suply a package name\napt-cross package [arch] [suite] [mirror]" exit 1 else package=$1 fi #defaults should be derived from dpkg-cross config #mirror=http://us.arm.mirror.debian.net/debian/ mirror=http://ftp.uk.debian.org/debian/ arch=arm suite=unstable dpkg_dir=/var/lib/dpkg-cross apt_dir=/var/lib/apt-cross if [ "" != "$2" ]; then arch=$2 fi if [ "" != "$3" ]; then suite=$2 fi if [ "" != "$4" ]; then mirror=$2 fi function do_once_a_day { # $1 is touchfile $2 is command # find finds touchfile if created in this 24hrs. if [ ! -n "find . -name $1 -daystart -mtime 0" ] ; then if $2; then touch $1; fi fi } function download_arch_packages() { archivename=`cat $apt_dir/sources.$suite | grep "deb " | cut -d " " -f 2` # for package in $packagelist # do filename=`fakeroot apt-cache -o Apt::Architecture=$arch -c \ $apt_dir/apt.conf-$suite show $package | \ grep ^Filename: | sed -e "s/Filename: //"` wget -nd -N -nv ${archivename}${filename} # done } function update_sources() { #start by downloading sources, but only if not already done this 24hrs do_once_a_day "$apt_dir/.aptupdate-touchfile" "fakeroot apt-get -o Apt::Architecture=$arch -c $apt_dir/apt.conf-$suite update" #this doesn't work - but should - needs bug filing # (cd $native_dir && sudo aptitude -o Apt::Architecture=$arch \ # -o Apt::Dir="/var/emdebian/tools/apt/" \ # -o Apt::Dir::Etc="/var/emdebian/tools/apt/" \ # -o Apt::Dir::Etc::SourceList="sources.$suite" \ # -o Apt::Dir::State=$suite/ \ # -o Apt::Dir::Cache=$suite/ \ # download $packages } function setup_config() { #set up necessary dirs for cross-dpkg database for dir in $suite/lists/partial $suite/archives/partial; do mkdir -p $apt_dir/$dir done for file in alternatives info parts updates; do mkdir -p $dpkg_dir/$file done for file in diversion statoverride status lock; do if [ ! -e $dpkg_dir/$file ] ; then touch $dpkg_dir/$file; fi done #make apt-conf file and sources files if [ ! -e $apt_dir/apt.conf-$suite ]; then cat > $apt_dir/apt.conf-$suite << **END** Dir "$apt_dir/" { Etc "$apt_dir/" { SourceList "sources.$suite"; }; State "$suite/"; Cache "$suite/"; }; **END** fi #should check if $mirror is diff to what's in this file and if so re-write. if [ ! -e $apt_dir/sources.$suite ]; then cat > $apt_dir/sources.$suite << **END** deb $mirror $suite main deb-src $mirror $suite main **END** fi } #----------------- #here is the program proper setup_config update_sources download_arch_packages
