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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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