core-lightning/tools/refresh-submodules.sh

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#! /bin/sh
if [ $# = 0 ]; then
echo "Usage: $0 <submoduledir1>..." >&2
exit 1
fi
# git submodule can't run in parallel. Really.
echo $$ > .refresh-submodules.$$
if ! mv -n .refresh-submodules.$$ .refresh-submodules; then
rm -f .refresh-submodules.$$
exit 0
fi
trap "rm -f .refresh-submodules" EXIT
# Be a little careful here, since we do rm -rf!
for m in "$@"; do
if ! grep -q "path = $m\$" .gitmodules; then
echo "$m is not a submodule!" >&2
exit 1
fi
done
# git submodule can segfault. Really.
if [ "$(git submodule status "$@" | grep -c '^ ')" != $# ]; then
echo Reinitializing submodules "$@" ...
git submodule sync "$@"
rm -rf "$@"
git submodule update --init "$@"
fi