bash script to clone all nested gitlab groups and repos from a parent group id

gitlab_clone_all.sh

#!/usr/bin/env bash
set -euo pipefail

usage() {
        echo "Usage: ${0##*/} -t <token> [-g <id>]"
        echo
        echo "Arguments:"
        echo "  -t <token>  personal access token (required)"
        echo "  -g <id>     groupID to clone (defaults to your membership projects)"
}

die() {
        echo "$1" >&2
        exit 1
}

require_cmd() {
        command -v "$1" >/dev/null 2>&1 || die "Missing dependency: $1"
}

GITLAB_TOKEN=""
GROUPID=""

while getopts "ht:g:" opt; do
        case "$opt" in
                h)
                        usage
                        exit 0
                        ;;
                t)
                        GITLAB_TOKEN="${OPTARG}"
                        ;;
                g)
                        GROUPID="${OPTARG}"
                        ;;
                *)
                        usage >&2
                        exit 1
                        ;;
        esac
done

[[ -n "${GITLAB_TOKEN}" ]] || { usage >&2; exit 1; }
require_cmd curl
require_cmd jq
require_cmd git

PER_PAGE=100
PAGE=1

if [[ -n "${GROUPID}" ]]; then
        API_PATH="/api/v4/groups/${GROUPID}/projects?include_subgroups=true"
else
        API_PATH="/api/v4/projects?membership=true"
fi

while :; do
        JSON="$(
                curl -sS \
                        --header "PRIVATE-TOKEN: ${GITLAB_TOKEN}" \
                        "https://gitlab.com${API_PATH}&per_page=${PER_PAGE}&page=${PAGE}"
        )"

        COUNT="$(echo "${JSON}" | jq 'length')"
        [ "${COUNT}" -eq 0 ] && break

        echo "${JSON}" |
                jq -r '.[] | [.path_with_namespace, .ssh_url_to_repo] | @tsv' |
                while IFS=$'\t' read -r path repo; do
                        dir="${path%/*}"
                        mkdir -p "${dir}"
                        if [[ -d "${path}/.git" ]]; then
                                echo "Skipping existing repo: ${path}"
                                continue
                        fi
                        git clone "${repo}" "${path}"
                done

        PAGE=$((PAGE + 1))
done