#!/bin/bash

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

    local git_folders=$(ls-git-folder "$1")
    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)
        local shallow=$(git config --file .gitmodules --get submodule."$git_folder".shallow)
        local git_folder_branch=$(git config --file .gitmodules --get submodule."$git_folder".branch)

        if [[ -z "$git_folder_path" ]] || [[ -z "$git_folder_url" ]]; then
            echo "Skipping: '$git_folder' not defined in .gitmodules."
            continue
        fi

        # Skip if directory exists and is not empty
        if [[ -d "$git_folder_path" ]] && [[ -n "$(ls -A "$git_folder_path")" ]]; then
            echo "Skipping: '$git_folder_path' already exists and is not empty."
            continue
        fi

        if [[ "$shallow" = "true" ]]; then
            echo "Clone git folder $git_folder (shallow) with $git_folder_branch branch"
            git -C "$git_folder" config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
            git clone --depth 1 --no-single-branch "$git_folder_url" "$git_folder_path"
        else
            echo "Clone git folder $git_folder with $git_folder_branch branch"
            git clone --branch="$git_folder_branch" "$git_folder_url" "$git_folder_path"
        fi
    done
}
cgif() {
    clone-git-folder "$@"
}