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#!/bin/bash
# Syncs Arch repos based on info contained in repo.db files
# License: GPLv3
# Principles
# * Get repo.db from an Arch-like repo
# * Generate a list of available packages
# * Create sync whitelist (based on package blacklist)
# * Get packages
# * Check package signatures
# * Check database signatures
# * Sync repo => repo
# TODO
# * make a tarball of files used for forensics
# Run as `V=true db-sync` to get verbose output
VERBOSE=${V}
extra=()
${VERBOSE} && extra+=(-v)
WORKDIR=$(mktemp -dt "${0##*/}.XXXXXXXXXX")
trap "rm -rf -- $(printf '%q' "${WORKDIR}")" EXIT
# Returns contents of a repo
get_repos() {
# Exclude everything but db files
rsync "${extra[@]}" --no-motd -mrtlH --no-p --include="*/" \
--include="*.db" \
--include="*${DBEXT}" \
--include="*.files" \
--include="*${FILESEXT}" \
--exclude="*" \
--delete-after \
"rsync://${mirror}/${mirrorpath}/" "$WORKDIR"
}
get_repo_content() {
# Return all contents
bsdtar tf "${1}" | \
cut -d "/" -f 1 | \
sort -u
}
# Prints blacklisted packages
get_blacklist() {
cut -d ':' -f 1 "${BLACKLIST_FILE}"
}
# repo
# arch
get_repo_file() {
echo "${WORKDIR}/${2}/${1}/${1}"
}
# Process the databases and get the libre packages
init() {
# Get the blacklisted packages
blacklist=($(get_blacklist))
# Store all the whitelist files
whitelists=()
msg "%d packages in blacklist" ${#blacklist[@]}
test ${#blacklist[@]} -eq 0 && fatal_error "Empty blacklist"
# Sync the repos databases
get_repos
# Traverse all repo-arch pairs
for _arch in "${OURARCHES[@]}"; do
for _repo in "${ARMREPOS[@]}"; do
msg "Processing %s-%s" "${_repo}-${_arch}"
db_file=$(get_repo_file "${_repo}" "${_arch}")${DBEXT}
files_file=$(get_repo_file "${_repo}" "${_arch}")${FILESEXT}
if [ ! -f "${db_file}" ]; then
warning "%s doesn't exist, skipping this arch-repo" "${db_file}"
continue
fi
if [ ! -f "${files_file}" ]; then
warning "%s doesn't exist, skipping this arch-repo" "${files_file}"
continue
fi
# Remove blacklisted packages and count them
# TODO capture all removed packages for printing on debug mode
msg2 "Removing blacklisted packages from %s database..." .db
LC_ALL=C repo-remove "${db_file}" "${blacklist[@]}" \
|& sed -n 's/-> Removing/ &/p'
msg2 "Removing blacklisted packages from %s database..." .files
LC_ALL=C repo-remove "${files_file}" "${blacklist[@]}" \
|& sed -n 's/-> Removing/ &/p'
# Get db contents
db=($(get_repo_content "${db_file}"))
msg2 "Process clean db for syncing..."
# Create a whitelist, add * wildcard to end
# TODO due to lack of -arch suffix, the pool sync retrieves every arch even if
# we aren't syncing them
# IMPORTANT: the . in the sed command is needed because an empty
# whitelist would consist of a single * allowing any package to
# pass through
printf '%s\n' "${db[@]}" | sed "s|.$|&*|g" > "/tmp/${_repo}-${_arch}.whitelist"
msg2 "%d packages in whitelist" "$(wc -l /tmp/${_repo}-${_arch}.whitelist | cut -d' ' -f1)"
# Sync excluding everything but whitelist
# We delete here for cleanup
rsync "${extra[@]}" --no-motd -rtlH \
--delete-after \
--delete-excluded \
--delay-updates \
--include-from="/tmp/${_repo}-${_arch}.whitelist" \
--exclude="*" \
"rsync://${mirror}/${mirrorpath}/${_arch}/${_repo}/" \
"${FTP_BASE}/${_repo}/os/${_arch}/"
# Add a new whitelist
whitelists+=(/tmp/${_repo}-${_arch}.whitelist)
msg "Putting databases back in place"
rsync "${extra[@]}" --no-motd -rtlH \
--delay-updates \
--safe-links \
"${WORKDIR}/${_arch}/${_repo}/" \
"${FTP_BASE}/${_repo}/os/${_arch}/"
# Cleanup
unset db
done
done
date -u +%s > "${FTP_BASE}/lastsync"
# Cleanup
unset blacklist whitelists _arch _repo repo_file
}
trap_exit() {
local signal=$1; shift
echo
error "$@"
trap -- "$signal"
kill "-$signal" "$$"
}
source "$(dirname "$(readlink -e "$0")")/config"
source "$(dirname "$(readlink -e "$0")")/db-sync-arm.conf"
source "$(dirname "$(readlink -e "$0")")/db-libremessages"
# Check variables presence
for var in DBEXT FILESEXT mirror mirrorpath WORKDIR BLACKLIST_FILE FTP_BASE ARCHSRCPOOLS ARCHPKGPOOLS; do
test -z "${!var}" && fatal_error "Empty %s" "${var}"
done
# From makepkg
set -E
for signal in TERM HUP QUIT; do
trap "trap_exit $signal '%s signal caught. Exiting...' $signal" "$signal"
done
trap 'trap_exit INT "Aborted by user! Exiting..."' INT
trap 'trap_exit USR1 "An unknown error has occurred. Exiting..."' ERR
init
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