update-submodules

#!/bin/bash

# Update git submodules and commit new version of the documentation

set -e

# Get current checkout
current_checkout="$(git rev-parse HEAD)"

# Get latest state of the repository
git fetch

# Get new checkout id
new_checkout="$(git rev-parse FETCH_HEAD)"

if [ "${current_checkout}" != "${new_checkout}" ] ; then

    # Switch current checkout to the new state
    git reset --hard FETCH_HEAD

    # Get latest updates from all submodules
    git submodule update --init --remote

    # Commit all changes
    git commit --all --message 'Updated all submodules to latest master'

    # Push changes to the origin
    git push

else

    # Get latest updates from all submodules
    git submodule update --init --remote

    # Check if there are uncommitted changes
    if ! $(git diff --quiet && git diff --cached --quiet) ; then

	# Commit all changes
	git commit --all --message 'Updated all submodules to latest master'

	# Push changes to the origin
	git push

    fi

fi