Sandbox::https://github.com/apache/openserverless/blob/main/sync-branch.sh

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#!/bin/bash

# Licensed to the Apache Software Foundation (ASF) under one

# or more contributor license agreements. See the NOTICE file

# distributed with this work for additional information

# regarding copyright ownership. The ASF licenses this file

# to you under the Apache License, Version 2.0 (the

# "License"); you may not use this file except in compliance

# with the License. You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing,

# software distributed under the License is distributed on an

# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

# KIND, either express or implied. See the License for the

# specific language governing permissions and limitations

# under the License.

me="$(realpath $0)"

if test -z "$1"

then

cd "$(dirname $0)"

git submodule --quiet foreach --recursive "$me \$toplevel/.gitmodules \$name"

#>_submodules

#cat _submodules

else

#echo "*** $1 - $2 ***"

#pwd

BRANCH=$(git config -f "$1" "submodule.$2.branch")

if test -z "$BRANCH"

then echo "??? $(pwd) no branch: $2"

else

CUR=$(git rev-parse --abbrev-ref HEAD)

if test "$CUR" = "HEAD"

then git checkout "origin/$BRANCH" -B "$BRANCH"

else

if test "$CUR" = "$BRANCH"

then echo "ok: $2@$CUR "

else echo "!!! $2: found: $CUR expected: $BRANCH"