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#!/bin/sh
# Rudimentary copy a package from one repository to another.
# Note, that we do _not_ need to have the package itself, since all
# relevant information is already in the original package database.
# "Rudimentary" means the following restrictions:
# - no arguments are accepted
# - no database signatures are handled
# - only *.db.tar.gz and *.files.tar.gz are recognized as database
# shellcheck disable=SC2119,SC2120
usage() {
>&2 echo 'usage:'
>&2 echo ' repo-copy from-repo.db.tar.gz to-repo.db.tar.gz package1 package2 ...'
>&2 echo
>&2 echo 'Note, that the packages must be given with version, e.g. "linux-4.15.7-1.0".'
exit 2
}
if [ $# -le 2 ]; then
usage
fi
from_repo="$1"
to_repo="$2"
shift
shift
tmp_dir=$(mktemp -d 'repo-tools.XXXXXXXXXX' --tmpdir)
trap 'rm -rf --one-file-system "${tmp_dir}"' EXIT
# extract the databases
for repo in 'from' 'to'; do
for archive in 'db' 'files'; do
eval 'repo_db="${'"${repo}"'_repo}"'
if [ "${repo_db}" = "${repo_db%.db.tar.gz}" ]; then
>&2 printf '"%s" has an invalid suffix.\n' "${repo_db}"
usage
fi
if [ "${archive}" = 'files' ]; then
repo_db="${repo_db%.db.tar.gz}.files.tar.gz"
fi
if [ ! -f "${repo_db}" ]; then
>&2 printf 'Cannot open file "%s".\n' "${repo_db}"
usage
fi
mkdir "${tmp_dir}/${repo}.${archive}"
bsdtar -C "${tmp_dir}/${repo}.${archive}" -xf "${repo_db}"
done
done
# move the packages
for package in "$@"; do
errors=$(
find "${tmp_dir}/to.db" "${tmp_dir}/to.files" -mindepth 1 -maxdepth 1 \
-printf '%f\n' | \
sed 's/-[^-]\+-[^-]\+$//' | \
grep -xF "${package%-*-*}"
)
if [ -n "${errors}" ]; then
>&2 printf 'The target repository "%s" already contains the following packages - "repo-remove" them first:\n' \
"${to_repo}"
>&2 printf '%s\n' "${errors}"
exit 2
fi
for archive in 'db' 'files'; do
if [ ! -d "${tmp_dir}/from.${archive}/${package}" ]; then
>&2 printf 'Repository "%s" does not contain package "%s"\n' \
"${from_repo}" "${package}"
exit 2
fi
mv "${tmp_dir}/from.${archive}/${package}" "${tmp_dir}/to.${archive}/"
done
done
# pack the database
for archive in 'db' 'files'; do
repo_db="${to_repo}"
if [ "${archive}" = 'files' ]; then
repo_db="${repo_db%.db.tar.gz}.files.tar.gz"
fi
bsdtar -C "${tmp_dir}" -czf "${tmp_dir}/${repo_db##*/}" --strip-components=1 "to.${archive}"
done
# move the database in place
for archive in 'db' 'files'; do
repo_db="${to_repo}"
if [ "${archive}" = 'files' ]; then
repo_db="${repo_db%.db.tar.gz}.files.tar.gz"
fi
mv "${tmp_dir}/${repo_db##*/}" "${repo_db}"
done
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