#!/usr/bin/env bash
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# We want to catch any unexpected failure, and exit immediately
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set -e
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# Download helper for bzr, to be called from the download wrapper script
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#
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# Call it as:
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# .../bzr [-q] OUT_FILE REPO_URL REV BASENAME
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#
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# Environment:
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# BZR : the bzr command to call
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verbose=
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while getopts :q OPT; do
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case "${OPT}" in
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q) verbose=-q;;
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\?) printf "unknown option '%s'\n" "${OPTARG}" >&2; exit 1;;
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esac
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done
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shift $((OPTIND-1))
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output="${1}"
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repo="${2}"
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rev="${3}"
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basename="${4}"
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shift 4 # Get rid of our options
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# Caller needs to single-quote its arguments to prevent them from
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# being expanded a second time (in case there are spaces in them)
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_bzr() {
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eval ${BZR} "${@}"
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}
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# --per-file-timestamps comes with bzr-2.2 (released August 2010),
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# so only pass it if bzr is recent enough. We compute versions as:
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# major*1000 + minor
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bzr_min_version=2002
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bzr_version=$(($(bzr --version |
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sed -r -n 's/^Bazaar \(bzr\) ([[:digit:]]+)\.([[:digit:]]+)\..*$/\1*1000+\2/p')
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))
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# If the version is recent enough, we can generate reproducible
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# archives; otherwise, we just hope for the best (as it would
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# be downloaded from the BR mirror if what we generate here does
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# not match the hash we have for it).
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if [ ${bzr_version} -ge ${bzr_min_version} ]; then
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timestamp_opt="--per-file-timestamps"
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fi
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_bzr export ${verbose} --root="'${basename}/'" --format=tgz \
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${timestamp_opt} - "${@}" "'${repo}'" -r "'${rev}'" \
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>"${output}"
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