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#!/bin/bash
target=$1
if [ ! -f "$target" ]; then
echo "Usage: $0 target-executable"
exit 1
fi
pfile=/tmp/packages_$$
rfile=/tmp/redundant_$$
trap "rm -f $pfile $rfile" 0
echo 1>&2
ldd "$target" | awk '{ print $3; }' | grep '^/' | while read lib; do
if test -n "$lib" ; then
dpkg-query -S "$lib"
fi
done | grep ': ' | awk -F: '{ print $1 }' | sort | uniq > $pfile
echo "Packages providing required libraries:" 1>&2
cat $pfile 1>&2
echo 1>&2
for p in `cat $pfile`; do
echo Looking at $p 1>&2
apt-cache showpkg "$p" | grep '^ ' | grep ',' | awk -F, '{ print $1; }' | \
while read d; do
if grep -q '^'$d'$' $pfile; then
echo $p
fi
done
done | sort | uniq > $rfile
echo "Packages that can be eliminated because other packages depend on them:" 1>&2
cat $rfile 1>&2
echo 1>&2
cat $pfile $rfile | sort | uniq -u | sed 's/$/,/' | fmt -1000 | sed 's/^/Depends: /' | sed 's/,$/, libc6/'
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