| #!/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 |
| # |
| # Call it as: |
| # .../bzr [-q] OUT_FILE REPO_URL REV BASENAME |
| # |
| # Environment: |
| # BZR : the bzr command to call |
| |
| |
| verbose= |
| while getopts :q OPT; do |
| case "${OPT}" in |
| q) verbose=-q;; |
| \?) printf "unknown option '%s'\n" "${OPTARG}" >&2; exit 1;; |
| esac |
| done |
| shift $((OPTIND-1)) |
| |
| output="${1}" |
| repo="${2}" |
| rev="${3}" |
| basename="${4}" |
| |
| # 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 \ |
| ${timestamp_opt} - "'${repo}'" -r "'${rev}'" \ |
| >"${output}" |