balena-supervisor/sync/init.ts

import * as Docker from 'dockerode';
import { Dockerfile } from 'livepush';

import * as device from './device';
import { setTimeout } from 'timers/promises';

interface Opts {
	address: string;
	imageName: string;
	imageTag: string;
	docker: Docker;
	dockerfile: Dockerfile;
	nocache: boolean;
	arch?: string;
}

export async function initDevice(opts: Opts) {
	const arch = opts.arch ?? (await device.getDeviceArch(opts.docker));
	const image = `${opts.imageName}:${opts.imageTag}`;

	const buildCache = await device.readBuildCache(opts.address);

	const stageImages = await device.performBuild(opts.docker, opts.dockerfile, {
		buildargs: { ARCH: arch },
		t: image,
		labels: { 'io.balena.livepush-image': '1', 'io.balena.architecture': arch },
		cachefrom: (await device.getCacheFrom(opts.docker))
			.concat(image)
			.concat(buildCache),
		nocache: opts.nocache,
	});

	// Store the list of stage images for the next time the sync
	// command is called. This will only live until the device is rebooted
	await device.writeBuildCache(opts.address, stageImages);

	// Now that we have our new image on the device, we need
	// to stop the supervisor, update
	// /tmp/update-supervisor.conf with our version, and
	// restart the supervisor
	await device.stopSupervisor(opts.address);
	await device.replaceSupervisorImage(
		opts.address,
		opts.imageName,
		opts.imageTag,
	);
	await device.startSupervisor(opts.address);

	let supervisorContainer: undefined | Docker.ContainerInfo;
	while (supervisorContainer == null) {
		try {
			supervisorContainer = await device.getSupervisorContainer(
				opts.docker,
				true,
			);
		} catch {
			await setTimeout(500);
		}
	}
	return { containerId: supervisorContainer.Id, stageImages };
}