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#!/usr/bin/env bash
# We want to catch any unexpected failure, and exit immediately
set -e
# Download helper for bzr, to be called from the download wrapper script
#
# Options:
# -q Be quiet
# -o FILE Generate archive in FILE.
# -u URI Clone from repository at URI.
# -c CSET Use changeset (or revision) CSET.
# -n NAME Use basename NAME.
#
# Environment:
# BZR : the bzr command to call
verbose=
while getopts "${BR_BACKEND_DL_GETOPTS}" OPT; do
case "${OPT}" in
q) verbose=-q;;
o) output="${OPTARG}";;
u) uri="${OPTARG}";;
c) cset="${OPTARG}";;
n) basename="${OPTARG}";;
:) printf "option '%s' expects a mandatory argument\n" "${OPTARG}"; exit 1;;
\?) printf "unknown option '%s'\n" "${OPTARG}" >&2; exit 1;;
esac
done
shift $((OPTIND-1)) # Get rid of our options
# Caller needs to single-quote its arguments to prevent them from
# being expanded a second time (in case there are spaces in them)
_bzr() {
eval ${BZR} "${@}"
}
# --per-file-timestamps comes with bzr-2.2 (released August 2010),
# so only pass it if bzr is recent enough. We compute versions as:
# major*1000 + minor
bzr_min_version=2002
bzr_version=$(($(bzr --version |
sed -r -n 's/^Bazaar \(bzr\) ([[:digit:]]+)\.([[:digit:]]+)\..*$/\1*1000+\2/p')
))
# If the version is recent enough, we can generate reproducible
# archives; otherwise, we just hope for the best (as it would
# be downloaded from the BR mirror if what we generate here does
# not match the hash we have for it).
if [ ${bzr_version} -ge ${bzr_min_version} ]; then
timestamp_opt="--per-file-timestamps"
fi
_bzr export ${verbose} --root="'${basename}/'" --format=tgz \
${timestamp_opt} - "${@}" "'${uri}'" -r "'${cset}'" \
>"${output}"
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