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#!/bin/sh
# extract config.sh.* files from binary packages
#
# Copyright 2016 Niko Tyni <ntyni@debian.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the same terms as Perl itself.
set -e
if [ $# = 0 ]; then
echo "Usage: $0 <file.deb> [...]" 1>&2
exit 1
fi
# sanity check
if [ ! -d debian/cross ]; then
echo "This program is supposed to run in the perl Debian package source directory" 1>&2
exit 1
fi
for deb in "$@"; do
arch=$(dpkg-deb -W --showformat '${Architecture}' "$deb")
if [ ! -n "$arch" ]; then
echo "Could not get Debian architecture of $deb" 1>&2
exit 1
fi
if [ ! -d "debian/cross/$arch" ]; then
echo "Unknown architecture: $arch (mkdir debian/cross/$arch first?), skipping" 1>&2
continue
fi
archlist="$archlist $arch"
version=$(dpkg-deb -W --showformat '${Version}' "$deb")
if [ ! -n "$version" ]; then
echo "Could not get Debian version from $deb" 1>&2
exit 1
fi
# shameless reliance on GNU tar fancy functionality
# note that we expand ${arch} in this shell and not the subshell
# so we don't have to export it
if ! dpkg-deb --fsys-tarfile "$deb" | tar xf - --wildcards \
'*/config.sh.static.gz' \
'*/config.sh.debug.gz' \
'*/config.sh.shared.gz' \
--to-command='sh -c "gzip -dc > debian/cross/'${arch}'/$(basename $TAR_FILENAME .gz)"'
then
echo "no config.sh.* files in $deb, skipping" 1>&2
continue
fi
echo "# Extracted from Debian package version $version" >> debian/cross/$arch/config.sh.static
# store debug and shared configs as contextless patches
# the idea is to make it as easy (heh) as possible for bootstrappers
# so they only have to craft the static one by hand
for type in shared debug; do
( cd debian/cross/$arch && \
! diff -u0 config.sh.static config.sh.$type > config.sh.$type.patch && \
rm config.sh.$type )
done
if [ -d .git ]; then
git add debian/cross/$arch
fi
done
if [ -d .git ]; then
debs=$(sha1sum "$@")
git commit -m "Refresh cross build support files for$archlist" \
-m "Files extracted by $0 from:" \
-m "$debs"
fi
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