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findunusedbd
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use heuristic to detect meta package

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main
josch 10 years ago
parent 57a0241b09
commit dcbc17a1c9
2 changed files with 88 additions and 23 deletions
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107
findunusedbd.sh
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@ -3,6 +3,47 @@
#
# sbuild --chroot-setup-commands='/home/prebuildcmd.sh chroot-setup' --pre-realbuild-commands='/home/prebuildcmd.sh pre-realbuild' --post-realbuild-commands='/home/prebuildcmd.sh post-realbuild'
get_metaset() {
name=$1
ver=$2
ismeta="no"
# now run all tests for meta package and skip to the end if package was
# found to be a meta package by one of the methods
# check for tag role::dummy and role::metapackage
if [ $ismeta = "no" ]; then
# we need grep-dctrl because the Tag field can be multi-line
if apt-cache show --no-all-versions "${name}=${ver}" \
| grep-dctrl -P "" -s Tag -n \
| sed 's/, /\n/g; s/[, ]//g;' \
| egrep '^(role::metapackage|role::dummy)$'; then
ismeta="yes"
fi
fi
# check if there is any regular file in the package besides /usr/share/doc
if [ $ismeta = "no" ]; then
apt-get download "${name}=${ver}"
mkdir "$name"
dpkg -x ${name}_${ver}_*.deb $name
if [ -d ${name}/usr/share/doc ]; then
rm -r ${name}/usr/share/doc
fi
# check if besides /usr/share/doc there is any regular file
# in this package (symlinks do not count)
if [ `find tmp -type f | wc -l` -eq 0 ]; then
ismeta="yes"
fi
rm -r ${name}_${ver}_*.deb $name
fi
if [ $ismeta = "yes" ]; then
# retrieve all its unversioned dependencies
# we already require grep-dctrl above so we can use it now too
apt-cache depends --important --installed "${name}=${ver}" \
| awk ' $1 ~ /\|?(Depends|PreDepends):/ { print $2; }'
fi
# output this package as well in any case
echo $name
}
if [ "$#" -eq 1 ]; then
tmpdir="$1"
# once something is written to the fifo, it indicates that fatrace should start
@ -29,7 +70,6 @@ if [ "$#" -eq 1 ]; then
# now get all packages in /tmp/pkglists that have files that never appear in the collected trace
while read namever; do
name=`echo $namever | cut -d '=' -f 1 | cut -d ':' -f 1`
# FIXME: the following cannot handle dependencies on virtual packages
if [ -z "`comm -12 "${tmpdir}/accessed.log" "${tmpdir}/$namever"`" ] \
&& grep --line-regexp "$name" "${tmpdir}/sbuild-dummy-depends" > /dev/null; then
echo $namever
@ -55,18 +95,30 @@ elif [ "$#" -eq 2 ]; then
name=$1
ver=$2
if grep --line-regexp "${name}=${ver}" "${tmpdir}/bdselection.list"; then
dpkg -L $name | sort > "${tmpdir}/${name}=${ver}"
# if the package contains no other files than in /usr/share/doc
# or if all the other files are symlinks
# or if it is tagged role::dummy
# or if it is tagged role::metapackage
# then it is a meta package and we append to the file it contains
# the files contained by the packages it depends upon
get_metaset $name $ver | sort | uniq \
| while read pkgname; do
dpkg --listfiles $pkgname
done | sort | uniq \
> "${tmpdir}/${name}=${ver}"
fi
done
# output the dependencies of the sbuild dummy package
# find sbuild dummy package name
dpkg --get-selections | awk '{ print $1; }' \
| grep sbuild-build-depends \
| grep -v sbuild-build-depends-core-dummy \
| grep -v sbuild-build-depends-essential-dummy \
| grep -v sbuild-build-depends-lintian-dummy \
| xargs -I {} dpkg-query --showformat='${Depends}\n' --show {} \
| sed 's/, \+/\n/'g \
| sed 's/\([a-zA-Z0-9][a-zA-Z0-9+.-]*\).*/\1/' \
| grep -v sbuild-build-depends-lintian-dummy`
# output the dependencies of the sbuild dummy package
# we use apt to show dependencies because we do not want
# disjunctions or purely virtual packages to be in the output
apt-cache depends --important --installed $dummypkgname \
| awk ' $1 ~ /\|?(Depends|PreDepends):/ { print $2; }' \
| sort \
| uniq \
> "${tmpdir}/sbuild-dummy-depends"
@ -89,22 +141,33 @@ elif [ "$#" -eq 2 ]; then
;;
equivs)
namever="$2"
# create and install a package with same name and version but without dependencies
# removing Source: field because of bug#751942
apt-cache show --no-all-versions $namever \
| grep -v "^Pre-Depends:" \
| grep -v "^Depends:" \
| grep -v "^Recommends:" \
| grep -v "^Suggests:" \
| grep -v "^Conflicts:" \
| grep -v "^Breaks:" \
| grep -v "^Provides:" \
| grep -v "^Replaces:" \
| grep -v "^Source:" \
| equivs-build -
name=`echo $namever | cut -d '=' -f 1 | cut -d ':' -f 1`
# we use a wildcard because there should only be a single file anyways
dpkg -i ${name}_*.deb
ver=`echo $namever | cut -d '=' -f 2`
# if the package contains no other files than in /usr/share/doc
# or if all the other files are symlinks
# or if it is tagged role::dummy
# or if it is tagged role::metapackage
# then it is a meta package and we also create fake equivs
# packages for all packages it depends upon
get_metaset $name $ver | sort | uniq \
| while read pkgname; do
# create and install a package with same name and version but without dependencies
# removing Source: field because of bug#751942
apt-cache show --no-all-versions $pkgname \
| grep -v "^Pre-Depends:" \
| grep -v "^Depends:" \
| grep -v "^Recommends:" \
| grep -v "^Suggests:" \
| grep -v "^Conflicts:" \
| grep -v "^Breaks:" \
| grep -v "^Provides:" \
| grep -v "^Replaces:" \
| grep -v "^Source:" \
| equivs-build -
# we use a wildcard because there should only be a single file anyways
dpkg -i ${pkgname}_*.deb
rm ${pkgname}_*.deb
done
;;
*)
echo "invalid argument: $1" >&2

4
run.sh
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@ -68,8 +68,10 @@ check () {
fi
while read bd; do
# now run sbuild with "findunusedbd.sh equivs" creating a fake equivs package
# we need to run it as a pre-realbuild-commands hook because it needs all
# dependencies to be installed
sbuild --$archall --quiet \
--chroot-setup-commands="/home/findunusedbd.sh equivs $bd" \
--pre-realbuild-commands="/home/findunusedbd.sh equivs $bd" \
"$dscname"
if [ $? -eq 0 ]; then
echo $bd >> "${unusedbdname}".real

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