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

if [[ -n "${INFINITO_IMAGE_REPOSITORY:-}" ]]; then
	printf '%s\n' "${INFINITO_IMAGE_REPOSITORY,,}"
	exit 0
fi

if [[ -n "${REPO_PREFIX:-}" ]]; then
	printf '%s\n' "${REPO_PREFIX,,}"
	exit 0
fi

if [[ -n "${GITHUB_REPOSITORY:-}" ]]; then
	repo_name="${GITHUB_REPOSITORY#*/}"
	printf '%s\n' "${repo_name,,}"
	exit 0
fi

if git_root="$(git rev-parse --show-toplevel 2>/dev/null)"; then
	repo_name="$(basename "${git_root}")"
	printf '%s\n' "${repo_name,,}"
	exit 0
fi

echo "ERROR: Could not resolve repository name from INFINITO_IMAGE_REPOSITORY, REPO_PREFIX, GITHUB_REPOSITORY or git metadata." >&2
exit 1