kumquat-buildroot/support/download/git
Yann E. MORIN e17719264b download/git: don't require too-recent git
git has supported -C only since 1.8.5, and some distros have not yet
caught up after more than 4 years...

Fall back to entering the directory.

Fixes:
    http://autobuild.buildroot.net/results/35f9f7a4adc6c2cad741079e4afdf1408c94703b

Reported-by: André Hentschel <nerv@dawncrow.de>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Cc: André Hentschel <nerv@dawncrow.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2018-04-08 21:46:36 +02:00

125 lines
4.2 KiB
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#!/usr/bin/env bash
# We want to catch any unexpected failure, and exit immediately
set -e
# Download helper for git, to be called from the download wrapper script
#
# Options:
# -q Be quiet.
# -r Clone and archive sub-modules.
# -o FILE Generate archive in FILE.
# -u URI Clone from repository at URI.
# -c CSET Use changeset CSET.
# -n NAME Use basename NAME.
#
# Environment:
# GIT : the git command to call
verbose=
recurse=0
while getopts "${BR_BACKEND_DL_GETOPTS}" OPT; do
case "${OPT}" in
q) verbose=-q; exec >/dev/null;;
r) recurse=1;;
o) output="${OPTARG}";;
u) uri="${OPTARG}";;
c) cset="${OPTARG}";;
d) dl_dir="${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)
_git() {
eval ${GIT} "${@}"
}
# We want to check if a cache of the git clone of this repo already exists.
git_cache="${dl_dir}/git"
# If the cache directory doesn't exists, init a new repo, which will be
# fetch'ed later.
if [ ! -d "${git_cache}" ]; then
_git init "'${git_cache}'"
pushd "${git_cache}" >/dev/null
_git remote add origin "'${uri}'"
popd >/dev/null
fi
pushd "${git_cache}" >/dev/null
_git remote set-url origin "'${uri}'"
# Try to fetch with limited depth, since it is faster than a full clone - but
# that only works if the version is a ref (tag or branch). Before trying to do
# a shallow clone we check if ${cset} is in the list provided by git ls-remote.
# If not we fallback to a full fetch.
#
# Messages for the type of clone used are provided to ease debugging in
# case of problems
git_done=0
if [ -n "$(_git ls-remote origin "'${cset}'" 2>&1)" ]; then
printf "Doing a shallow fetch\n"
if _git fetch "${@}" --depth 1 origin "'${cset}'"; then
git_done=1
else
printf "Shallow fetch failed, falling back to fetching all refs\n"
fi
fi
if [ ${git_done} -eq 0 ]; then
printf "Fetching all references\n"
_git fetch origin -t
fi
# Try to get the special refs exposed by some forges (pull-requests for
# github, changes for gerrit...). There is no easy way to know whether
# the cset the user passed us is such a special ref or a tag or a sha1
# or whatever else. We'll eventually fail at checking out that cset,
# below, if there is an issue anyway. Since most of the cset we're gonna
# have to clone are not such special refs, consign the output to oblivion
# so as not to alarm unsuspecting users, but still trace it as a warning.
if ! _git fetch origin "'${cset}:${cset}'" >/dev/null 2>&1; then
printf "Could not fetch special ref '%s'; assuming it is not special.\n" "${cset}"
fi
# Checkout the required changeset, so that we can update the required
# submodules.
_git checkout -q "'${cset}'"
# Get date of commit to generate a reproducible archive.
# %cD is RFC2822, so it's fully qualified, with TZ and all.
date="$( _git log -1 --pretty=format:%cD )"
# There might be submodules, so fetch them.
if [ ${recurse} -eq 1 ]; then
_git submodule update --init --recursive
fi
# Generate the archive, sort with the C locale so that it is reproducible.
# We do not want the .git dir; we keep other .git files, in case they are the
# only files in their directory.
# The .git dir would generate non reproducible tarballs as it depends on
# the state of the remote server. It also would generate large tarballs
# (gigabytes for some linux trees) when a full clone took place.
find . -not -type d \
-and -not -path "./.git/*" >"${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"
popd >/dev/null