Gitから一部のディレクトリのみをクローンします（gitコマンドが必要です）

git-sparse.sh

#!/usr/bin/env bash

#        CurrentVersion        >= 5
if [ -z "$BASH_VERSION" ]; then
    echo "This script works only Bash 5 or higher."
    exit 1
elif ! [[ "${BASH_VERSINFO[0]}" -ge 5 ]]; then
    echo "Error: Your Bash version is not supported by this script." >&2
    exit 1
fi

#-- Initilize --#
set -Eeuo pipefail
repo_url=""
target_dirs=()
pull_dir=""
branch="master"
dont_keep_dotgit=true

#-- FasBashLib 0.2.5.1 --#
for_each(){
        local _Item
        while read -r _Item; do    
            "${@//"{}"/"${_Item}"}" || return "${?}"
        done
}

print_array(){
    (($# >= 1)) || return 0
    printf "%s\n" "${@}"
}

#------------------------#

_help(){
    echo "Git Sparse Checkout"
    echo
    echo "  Usage: $0 [options] <repo> <target dir1> <target dir2> ..."
    echo "Examlpe: $0 -b master https://github.com/FascodeNet/alterlinux tools"
    echo
    echo "Options:"
    echo "    -b <branch>    Branch to pull from (default: $branch)"
    echo "    -p <path>      Path to pull to (default: $pull_dir)"
    echo "    -n             Do not keep .git directory (default: $dont_keep_dotgit)"
    echo "    -h             Show this help"
}

_run_in_pulldir(){
    (
        cd "$pull_dir" || return 1
        "$@"
    ) || return 1
    return 0
}

_check_args(){
    if [[ -z "${repo_url}" ]]; then
        echo "Error: repo url is not specified"
        _help
        return 1
    fi

    if [[ -z "${target_dirs[*]}" ]]; then
        echo "Error: target dirs are not specified"
        _help
        return 1
    fi

    if print_array "${target_dirs[@]}" | grep -q -x "/"; then
        echo "Error: target dir cannot be root"
        return 1
    fi

    return 0
}

_setup_pulldir(){
    mkdir -p "$pull_dir"

    if [[ -n $(ls "$pull_dir") ]]; then
        echo "Error: $pull_dir is not empty"
        return 1
    fi

    _run_in_pulldir git init
    _run_in_pulldir git config core.sparsecheckout true
    _run_in_pulldir git remote add origin "$repo_url"
}

_setup_sparse(){
    print_array "${target_dirs[@]#/}" | for_each echo "{}" >> "$pull_dir/.git/info/sparse-checkout"

}

_run_pull(){
    _run_in_pulldir git pull --depth 1 origin "$branch"
}

_post_pull(){
    if [[ "$dont_keep_dotgit" = true ]]; then
        _run_in_pulldir rm -rf .git
    fi
}

#-- Main --#
while getopts "b:p:kh" opt; do
    case "$opt" in
        b) branch="$OPTARG"   ;;
        p) pull_dir="$OPTARG" ;;
        k) dont_keep_dotgit=true   ;;
        h) _help; exit 0      ;;
        *)
            _help
            exit 1
            ;;
    esac
done
shift $((OPTIND - 1))
repo_url="${1-""}"
target_dirs=("${@:2}")
pull_dir="$(pwd)/$(basename "${repo_url%".git"}")"

#-- Start --#
_check_args
_setup_pulldir
_setup_sparse
_run_pull
_post_pull