#!/bin/bash
# adapted from https://stackoverflow.com/a/53899440
submodules() {
    git -C "${REPO_PATH}" config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
        while read -r KEY MODULE_PATH
        do
            # If the module's path exists, remove it.
            # This is done b/c the module's path is currently 
            # not a valid git repo and adding the submodule will cause an error.
            [ -d "${MODULE_PATH}" ] && rm -rf "${MODULE_PATH}"

            NAME="$(echo "${KEY}" | sed 's/^submodule\.\(.*\)\.path$/\1/')"

            url_key="$(echo "${KEY}" | sed 's/\.path$/.url/')"
            branch_key="$(echo "${KEY}" | sed 's/\.path$/.branch/')"

            URL="$(git config -f .gitmodules --get "${url_key}")"
            BRANCH="$(git config -f .gitmodules --get "${branch_key}" || echo "master")"

	    echo "Installing submodule ${NAME}"

            git -C "${REPO_PATH}" submodule add --force -b "${BRANCH}" --name "${NAME}" "${URL}" "${MODULE_PATH}" || continue
        done

    git -C "${REPO_PATH}" submodule update --init --recursive
    echo "Instalation done...."
}
submodules