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#!/bin/bash
container="$1"
if test -z "$container" ; then
echo "usage: create_container_package_list <container>"
exit 1
fi
if ! test -s "$container" ; then
echo "no such container: $container" >&2
exit 1
fi
tmpdir=$(mktemp -d)
trap "rm -rf $tmpdir" EXIT
case "$container" in
*.tar) cat < "$container" > $tmpdir/cont ;;
*.tar.gz) gunzip < "$container" > $tmpdir/cont ;;
*.tar.xz) xzdec < "$container" > $tmpdir/cont ;;
*) echo "unsuppored container name $container" >&2 ; exit 1 ;;
esac
skopeo copy docker-archive:$tmpdir/cont oci:$tmpdir/image:latest >/dev/null
rm -f $tmpdir/cont
umoci unpack --image $tmpdir/image:latest $tmpdir/unpack >/dev/null
chroot $tmpdir/unpack/rootfs rpm -qa --qf '[%{NAME}|%{EPOCH}|%{VERSION}|%{RELEASE}|%{ARCH}|%{DISTURL}\n]'
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