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get-linux-source: always do git fetch #178

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Merged
theihor merged 1 commit into from
Apr 8, 2025
Merged

get-linux-source: always do git fetch #178

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2 changes: 1 addition & 1 deletion .github/workflows/gcc-bpf.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@ jobs:

- if: ${{ inputs.download_sources }}
name: Download bpf-next tree
uses: libbpf/ci/get-linux-source@v3
uses: ./get-linux-source
with:
dest: ${{ env.REPO_ROOT }}
rev: ${{ env.BPF_NEXT_BASE_BRANCH }}
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65 changes: 9 additions & 56 deletions get-linux-source/checkout_latest_kernel.sh
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Original file line number Diff line number Diff line change
@@ -1,69 +1,22 @@
#!/bin/bash

set -euo pipefail
set -xeuo pipefail

source $(cd $(dirname $0) && pwd)/../helpers.sh

CWD=$(pwd)

# 0 means just download a snapshot
FETCH_DEPTH=${FETCH_DEPTH:-0}
FETCH_DEPTH=${FETCH_DEPTH:-1}

echo KERNEL_ORIGIN = ${KERNEL_ORIGIN}
echo KERNEL_BRANCH = ${KERNEL_BRANCH}
echo REPO_PATH = ${REPO_PATH}

SNAPSHOT_URL=''
if [[ "${KERNEL_BRANCH}" = 'master' ]]; then
echo "using ${KERNEL_BRANCH} sha1"
LINUX_SHA=$(git ls-remote ${KERNEL_ORIGIN} ${KERNEL_BRANCH} | awk '{print $1}')
else
LINUX_SHA=${KERNEL_BRANCH}
fi
SNAPSHOT_URL=${KERNEL_ORIGIN}/snapshot/bpf-next-${LINUX_SHA}.tar.gz

echo LINUX_SHA = ${LINUX_SHA}
echo SNAPSHOT_URL = ${SNAPSHOT_URL}

if [ -d "${REPO_PATH}" ]; then
echo "${REPO_PATH} directory already exists, will not download kernel sources"
exit 0
exit 1
fi

mkdir -p $(dirname "${REPO_PATH}")
cd $(dirname "${REPO_PATH}")

# attempt to fetch desired bpf-next repo snapshot
if [[ -n "${SNAPSHOT_URL}" && "${FETCH_DEPTH}" -le 0 ]]; then
wget -U 'BPFCIBot/1.0 (bpf@vger.kernel.org)' -nv ${SNAPSHOT_URL} || true
PRESERVE_DOT_GIT=
else
PRESERVE_DOT_GIT=true
fi

tarball=bpf-next-${LINUX_SHA}.tar.gz
if [[ -f "$tarball" ]]; then
tar xf "$tarball" --totals
mv bpf-next-${LINUX_SHA} $(basename ${REPO_PATH})
else
# FETCH_DEPTH can be 0 here in case snapshot download has failed
if [ "${FETCH_DEPTH}" -le 0 ]; then
FETCH_DEPTH=1
fi

git clone --depth ${FETCH_DEPTH} ${KERNEL_ORIGIN} ${REPO_PATH}

cd "${REPO_PATH}"
# 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 origin
fi
git reset --hard ${LINUX_SHA}
cd -
fi

if [ -z "${PRESERVE_DOT_GIT}" ]; then
rm -rf ${REPO_PATH}/.git || true
fi
mkdir -p "${REPO_PATH}"
cd "${REPO_PATH}"

git init
git remote add origin ${KERNEL_ORIGIN}
git fetch --depth=${FETCH_DEPTH} origin ${KERNEL_BRANCH}
git checkout FETCH_HEAD
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