#!/bin/bash

pull-git-folder() {
    if [[ -z "$1" ]]; then
        echo '$1/branch is empty.'
        exit
    fi
    if [[ -z "$2" ]]; then
        echo '$2/path is empty.'
        exit
    fi

    local git_folders=$(ls-git-folder "$2")
    for git_folder in $git_folders; do
        git_folder="${git_folder#./}"

        local git_folder_path=$(git config --file .gitmodules --get submodule."$git_folder".path)
        local git_folder_url=$(git config --file .gitmodules --get submodule."$git_folder".url)
        
        if [[ -z "$git_folder_path" ]] || [[ -z "$git_folder_url" ]]; then
            echo "Skipping: '$git_folder' not defined in .gitmodules."
            continue
        fi

        echo "Pull git folder $git_folder."
        git -C "$git_folder" stash
        git -C "$git_folder" pull origin "$1"
    done
}
pgf() {
    pull-git-folder "$@"
}