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#!/usr/bin/env bash
# Shows a diff between repo databases
# Copyright (C) 2013 Nicolás Reynolds <fauno@parabola.nu>
#
# License: Unspecified
. libremessages
usage() {
print "Usage: %s arch/core/i686 parabola/core/i686" "${0##*/}"
print "Compares two repo databases using distro/repo/architecture format."
echo
print 'Shortcuts:'
flag 'arch' 'expands to Arch Linux repo url'
flag 'parabola' 'expands to Parabola GNU/Linux-libre repo url'
}
if test $# -eq 0; then
usage
exit 0
fi
b() { bsdtar ztf $1 | cut -d "/" -f1 | sort -u ; }
n() { echo "$1".db | tr "/" "-"; }
# hopefully simple way to convert
# parabola/libre/i686
# to
# http://repo.parabolagnulinux.org/libre/os/i686/libre.db
# add more distros here
g() {
echo "$1" | sed -e "s,^\([^/]\+\)/\([^/]\+\)/\([^/]\+\)$,\1/\2/os/\3/\2.db," \
-e "s,^parabola/,http://repo.parabolagnulinux.org/," \
-e "s,^arch\(linux\)\?/,http://mirrors.kernel.org/archlinux/,"
}
mkdir ${0##*/}.$$
pushd ${0##*/}.$$ >/dev/null
d=""
for i in $1 $2; do
n=$(n "$i")
test -z "$n" && exit 1
wget -O "$n" -nv $(g "$i")
b "$n" >${n}.orig
d+=" ${n}.orig"
done
{
printf "$(gettext "Difference between %s and %s")\n---\n" $1 $2
which diffstat &>/dev/null && diff -auN "${d[@]}" | diffstat
diff -auN "${d[@]}"
} >../${n}.diff
popd >/dev/null
rm -r ${0##*/}.$$
print "Difference save on %s" "${n}.diff"
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