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sync: centralize kernel-to-github paths mapping

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Use associative array (requires at least bash 4) to centralize mapping
of paths between kernel's libbpf layout and the one on Github. This
minimizes the chance of all those mappings getting out of sync (which
happened twice before).

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
This commit is contained in:
Andrii Nakryiko
2019-08-08 15:11:01 -07:00
committed by Andrii Nakryiko
parent c020432531
commit 342bcfa319
1 changed files with 22 additions and 12 deletions
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34
scripts/sync-kernel.sh
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@@ -19,6 +19,28 @@ fi
set -eu
declare -A PATH_MAP
PATH_MAP=( \
[tools/lib/bpf]=src \
[tools/include/uapi/linux/bpf_common.h]=include/uapi/linux/bpf_common.h \
[tools/include/uapi/linux/bpf.h]=include/uapi/linux/bpf.h \
[tools/include/uapi/linux/btf.h]=include/uapi/linux/btf.h \
[tools/include/uapi/linux/if_link.h]=include/uapi/linux/if_link.h \
[tools/include/uapi/linux/if_xdp.h]=include/uapi/linux/if_xdp.h \
[tools/include/uapi/linux/netlink.h]=include/uapi/linux/netlink.h \
[tools/include/tools/libc_compat.h]=include/tools/libc_compat.h \
)
LIBBPF_PATHS="${!PATH_MAP[@]}"
LIBBPF_VIEW_PATHS="${PATH_MAP[@]}"
LIBBPF_VIEW_EXCLUDE_REGEX='^src/(Makefile|Build|test_libbpf.cpp|\.gitignore)$'
LIBBPF_TREE_FILTER="mkdir -p __libbpf/include/uapi/linux __libbpf/include/tools && "$'\\\n'
for p in "${!PATH_MAP[@]}"; do
LIBBPF_TREE_FILTER+="git mv -kf ${p} __libbpf/${PATH_MAP[${p}]} && "$'\\\n'
done
LIBBPF_TREE_FILTER+="git rm --ignore-unmatch -f __libbpf/src/{Makefile,Build,test_libbpf.cpp,.gitignore}"
WORKDIR=$(pwd)
trap "cd ${WORKDIR}; exit" INT TERM EXIT
@@ -65,8 +87,6 @@ git branch ${SQUASH_BASE_TAG} ${SQUASH_COMMIT}
git checkout -b ${SQUASH_TIP_TAG} ${SQUASH_COMMIT}
# Cherry-pick new commits onto squashed baseline commit
LIBBPF_PATHS=(tools/lib/bpf tools/include/uapi/linux/{bpf_common.h,bpf.h,btf.h,if_link.h,if_xdp.h,netlink.h} tools/include/tools/libc_compat.h)
LIBBPF_NEW_MERGES=$(git rev-list --merges --topo-order --reverse ${BASELINE_TAG}..${TIP_TAG} ${LIBBPF_PATHS[@]})
for LIBBPF_NEW_MERGE in ${LIBBPF_NEW_MERGES}; do
printf "MERGE:\t" && git log --oneline -n1 ${LIBBPF_NEW_MERGE}
@@ -104,14 +124,6 @@ for LIBBPF_NEW_COMMIT in ${LIBBPF_NEW_COMMITS}; do
fi
done
LIBBPF_TREE_FILTER=' \
mkdir -p __libbpf/include/uapi/linux __libbpf/include/tools && \
git mv -kf tools/lib/bpf __libbpf/src && \
git mv -kf tools/include/uapi/linux/{bpf_common.h,bpf.h,btf.h,if_link.h,if_xdp.h,netlink.h} \
__libbpf/include/uapi/linux && \
git mv -kf tools/include/tools/libc_compat.h __libbpf/include/tools && \
git rm --ignore-unmatch -f __libbpf/src/{Makefile,Build,test_libbpf.cpp,.gitignore} \
'
# Move all libbpf files into __libbpf directory.
git filter-branch --prune-empty -f --tree-filter "${LIBBPF_TREE_FILTER}" ${SQUASH_TIP_TAG} ${SQUASH_BASE_TAG}
# Make __libbpf a new root directory
@@ -151,8 +163,6 @@ git commit --file=-
echo "SUCCESS! ${COMMIT_CNT} commits synced."
echo "Verifying Linux's and Github's libbpf state"
LIBBPF_VIEW_PATHS=(src include/uapi/linux/{bpf_common.h,bpf.h,btf.h,if_link.h,if_xdp.h,netlink.h} include/tools/libc_compat.h)
LIBBPF_VIEW_EXCLUDE_REGEX='^src/(Makefile|Build|test_libbpf.cpp|\.gitignore)$'
cd ${WORKDIR} && cd ${LINUX_REPO}
LINUX_ABS_DIR=$(pwd)