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vmtests: speed up fetching of bpf-next sources

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Attempt to first fetch bpf-next tree from a snapshot, falling back to shallow
clone, and if that is not enough, doing a full bpf-next clone. This should
both improve a speed and (because of full clone fallback) improve test
reliability if libbpf wasn't synced in a while.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
This commit is contained in:
Andrii Nakryiko
2020-08-10 21:51:53 -07:00
committed by Andrii Nakryiko
parent bf3ab4b0d8
commit c57be0b4d6
1 changed files with 22 additions and 8 deletions
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30
travis-ci/vmtest/checkout_latest_kernel.sh
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@@ -8,17 +8,31 @@ REPO_PATH=$1
BPF_NEXT_ORIGIN=https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git
LINUX_SHA=$(cat ${LIBBPF_PATH}/CHECKPOINT-COMMIT)
SNAPSHOT_URL=https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/snapshot/bpf-next-${LINUX_SHA}.tar.gz
echo REPO_PATH = ${REPO_PATH}
echo LINUX_SHA = ${LINUX_SHA}
if [ ! -d "${REPO_PATH}" ]; then
mkdir -p ${REPO_PATH}
cd ${REPO_PATH}
git init
git remote add bpf-next ${BPF_NEXT_ORIGIN}
for depth in 32 64 128; do
git fetch --depth ${depth} bpf-next
git reset --hard ${LINUX_SHA} && break
done
mkdir -p $(dirname "${REPO_PATH}")
cd $(dirname "${REPO_PATH}")
# attempt to fetch desired bpf-next repo snapshot
if wget ${SNAPSHOT_URL} ; then
tar xf bpf-next-${LINUX_SHA}.tar.gz
mv bpf-next-${LINUX_SHA} $(basename ${REPO_PATH})
else
# but fallback to git fetch approach if that fails
mkdir -p ${REPO_PATH}
cd ${REPO_PATH}
git init
git remote add bpf-next ${BPF_NEXT_ORIGIN}
# try shallow clone first
git fetch --depth 32 bpf-next
# check if desired SHA exists
if ! git cat-file -e ${LINUX_SHA}^{commit} ; then
# if not, fetch all of bpf-next; slow and painful
git fetch bpf-next
fi
git reset --hard ${LINUX_SHA}
fi
fi