cleanup-ppas.sh

#!/bin/sh
BN="$(basename "$0")"
D="$(dirname "$0")"
D="$(cd "${D}" && pwd)"

ALL_PPAS="$1"
test -z "${ALL_PPAS}" && {
  ALL_PPAS="${D}/ppas"
}

TMPDIR="/tmp/${BN}-$(date +%s+%N|sha256sum|cut -d " " -f 1)-$$~"

RC=0
cleanUp () {
    rm -rf "${TMPDIR}"
    exit "${RC}"
}

trap cleanUp 0 1 2 3 4 5 6 7 8 9 10 12 13 14 15

mkdir "${TMPDIR}"

cat >"${TMPDIR}/do-not-delete" <<EOF
InRelease
Packages
Packages.bz2
Packages.gz
Packages.gpg
Release
Release.gpg
Sources
Sources.bz2
Sources.gz
Sources.gpg
lxc-public.asc
lxc-public.gpg
gpg-key-id
EOF

find "${ALL_PPAS}" -name "Sources" -or -name "Packages"|xargs -n1 dirname|sort -u >"${TMPDIR}/all-ppas"

#
# $1 ... filename
# $2 ... pname
#
getParameter () {
    (
	test -s "${1}" || exit 1
	L="$(grep "^\s*${2}:" "${1}")"
	test -n "${L}" || exit 1
	echo "${L}"|cut -d ":" -f 2-|tr -d " "
    )
}

while read -r PPA; do
    rm -f "${TMPDIR}/required-files"
    touch "${TMPDIR}/required-files"
    PPA_PARENT="$(dirname "${PPA}")"
    PACKAGES="${PPA}/Packages"
    test -s "${PACKAGES}" && {
	grep -E "^\s*Filename:\s*" "${PACKAGES}"|sed -e "s,^\s*Filename:\s*,," -e "s!^!${PPA_PARENT}/!" >>"${TMPDIR}/required-files"
    }
    SOURCES="${PPA}/Sources"
    test -s "${SOURCES}" && {
	rm -rf "${TMPDIR}/sources-splitted"
	mkdir "${TMPDIR}/sources-splitted"
	csplit --prefix="${TMPDIR}/sources-splitted/s." --suffix-format="%04d" "${SOURCES}" '/^\s*$/' '{*}' >/dev/null
	ls "${TMPDIR}/sources-splitted"/*|sort >"${TMPDIR}/sources-sorted"
	while read -r SRC; do
	    DIR="$(getParameter "${SRC}" "Directory")"
	    sed -n -e '/^Files:/,/^[^ ]/ p' "${SRC}"|grep "^\s"|sed -e 's/^\s*[0-9a-f]*\s*[0-9]*\s*//' -e "s!^!${PPA_PARENT}/${DIR}/!" >"${TMPDIR}/additional-files"
	    grep "\.dsc$" "${TMPDIR}/additional-files" >"${TMPDIR}/dsc-files"
	    cat "${TMPDIR}/additional-files" >>"${TMPDIR}/required-files"
	    while read -r DSC; do
		for a in amd64 i386 any; do
		    echo "${DSC}"|sed -e "s,\.dsc$,_${a}.changes," >>"${TMPDIR}/required-files"
		    echo "${DSC}"|sed -e "s,\.dsc$,_${a}.buildinfo," >>"${TMPDIR}/required-files"
		done
		sed -n -e '/^Files:/,/^[^ ]/ p' "${DSC}"|grep "^\s"|sed -e 's/^\s*[0-9a-f]*\s*[0-9]*\s*//' -e "s!^!${PPA_PARENT}/${DIR}/!" >"${TMPDIR}/additional-dsc-files"
		cat "${TMPDIR}/additional-dsc-files" >>"${TMPDIR}/required-files"		
		grep "\.orig\.tar" "${TMPDIR}/additional-dsc-files" >"${TMPDIR}/orig-tar-files"
		while read -r ORIG; do
		    B_ORIG="$(basename "${ORIG}")"
		    D_ORIG="$(dirname "${ORIG}")"
		    echo "${D_ORIG}/$(echo "${B_ORIG}"|sed -e 's,\.orig\.,.,' -e 's,_,-,')" >>"${TMPDIR}/required-files"
		done <"${TMPDIR}/orig-tar-files"
		rm -f "${TMPDIR}/additional-dsc-files" "${TMPDIR}/orig-tar-files"
	    done <"${TMPDIR}/dsc-files"
	    rm -f "${TMPDIR}/additional-files" "${TMPDIR}/dsc-files"
	done <"${TMPDIR}/sources-sorted"
	rm -f "${TMPDIR}/sources-sorted"
	rm -rf "${TMPDIR}/sources-splitted"
    }
    find "${PPA}" -type f|sort >"${TMPDIR}/all-files"
    while read -r FILE; do
	B_FILE="$(basename "${FILE}")"
	N_FILE="$(echo "${FILE}"|sed -e 's!\.\(changes\|buildinfo\|virustotal.*\|urls\)$!!')"
	grep "^${B_FILE}$" "${TMPDIR}/do-not-delete" >/dev/null && continue
	grep "^${N_FILE}$" "${TMPDIR}/required-files" >/dev/null && continue
	grep "^${FILE}$" "${TMPDIR}/required-files" >/dev/null && continue
	echo "${FILE}"
    done <"${TMPDIR}/all-files"
    rm -f "${TMPDIR}/all-files"
    rm -f "${TMPDIR}/required-files"
done <"${TMPDIR}/all-ppas"

rm -f "${TMPDIR}/all-ppas"

cleanUp
exit "${RC}"