kumquat-buildroot/support/download/svn
Heiko Thiery 89f5e98932 support/download/svn: generate reproducible svn archives
To generate a reproducible archive from a svn repository mainly the same
aproach is done like for the archives from a git repository.

Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
[yann.morin.1998@free.fr: get the date of the revision]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2019-12-30 10:50:21 +01:00

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#!/usr/bin/env bash
# We want to catch any unexpected failure, and exit immediately
set -e
# Download helper for svn, to be called from the download wrapper script
#
# Options:
# -q Be quiet.
# -o FILE Generate archive in FILE.
# -u URI Checkout from repository at URI.
# -c REV Use revision REV.
# -n NAME Use basename NAME.
#
# Environment:
# SVN : the svn 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) rev="${OPTARG}";;
n) basename="${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)
_svn() {
eval ${SVN} "${@}"
}
_svn export ${verbose} "${@}" "'${uri}@${rev}'" "'${basename}'"
# Get the date of the revision, to generate reproducible archives.
# The output format is YYYY-MM-DDTHH:MM:SS.mmmuuuZ (i.e. always in the
# UTC timezone), which we can feed as-is to the --mtime option for tar.
# In case there is a redirection (e.g. http -> https), just keep the
# last line (svn outputs everything on stdout)
date="$( _svn info --show-item last-changed-date "'${uri}@${rev}'" |tail -n 1 )"
# Generate the archive, sort with the C locale so that it is reproducible.
# We do not want the .svn dir; we keep other .svn files, in case they are the
# only files in their directory.
find "${basename}" -not -type d \
-and -not -path "./.svn/*" >"${output}.list"
LC_ALL=C sort <"${output}.list" >"${output}.list.sorted"
# Create GNU-format tarballs, since that's the format of the tarballs on
# sources.buildroot.org and used in the *.hash files
tar cf - --transform="s#^\./#${basename}/#" \
--numeric-owner --owner=0 --group=0 --mtime="${date}" --format=gnu \
-T "${output}.list.sorted" >"${output}.tar"
gzip -6 -n <"${output}.tar" >"${output}"
rm -f "${output}.list"
rm -f "${output}.list.sorted"