#!/bin/bash

set -e

message_file=.git/COMMIT_EDITMSG

get_git_root() {

git rev-parse --show-toplevel

}

write_msg() {

echo "$@" >> "${message_file}"

}

git_root="$(get_git_root)"

cd "${git_root}"

rm -f "${message_file}"

write_msg "Auto-update submodules"

write_msg ""

cat ci/update-submodules.manifest | while read path branch; do

cd "${git_root}/${path}"

test "${git_root}" != "$(get_git_root)"

git fetch origin "${branch}:${branch}"

git checkout "${branch}"

git branch --set-upstream-to="origin/${branch}" "${branch}"

git pull --ff-only

cd "${git_root}"

if ! git diff --quiet --ignore-submodules=dirty -- "${path}"; then

git add "${path}"

write_msg "${path}: ${branch}"

fi

done

if ! git diff --exit-code --cached; then

git commit --file "${message_file}" --no-edit

exit 0

else

exit 1

fi