Merge pull request #2895 from balena-io/bump-balena-lint-v9

Update @balena/lint to v9.1.3

automation/capitanodoc/capitanodoc.ts

@@ -145,7 +145,7 @@ export async function getCapitanoDoc(): Promise<typeof capitanoDoc> {
 				throw new Error(`Error parsing section title`);
 			}
 			// match[1] has the title, match[2] has the rest
-			return match && match[2];
+			return match?.[2];
 		}),
 		mdParser.getSectionOfTitle('Installation'),
 		mdParser.getSectionOfTitle('Choosing a shell (command prompt/terminal)'),

automation/update-module.ts

@@ -3,7 +3,7 @@ import * as semver from 'semver';
 
 const changeTypes = ['major', 'minor', 'patch'] as const;
 
-const validateChangeType = (maybeChangeType: string = 'minor') => {
+const validateChangeType = (maybeChangeType = 'minor') => {
 	maybeChangeType = maybeChangeType.toLowerCase();
 	switch (maybeChangeType) {
 		case 'patch':
@@ -136,5 +136,4 @@ async function main() {
 	}
 }
 
-// eslint-disable-next-line @typescript-eslint/no-floating-promises
-main();
+void main();

automation/utils.ts

@@ -19,6 +19,7 @@ import { spawn } from 'child_process';
 import * as path from 'path';
 import * as fs from 'fs';
 import { diffTrimmedLines } from 'diff';
+import * as whichMod from 'which';
 
 export const ROOT = path.join(__dirname, '..');
 
@@ -101,7 +102,6 @@ export function loadPackageJson() {
  * @returns The program's full path, e.g. 'C:\WINDOWS\System32\OpenSSH\ssh.EXE'
  */
 export async function which(program: string): Promise<string> {
-	const whichMod = await import('which');
 	let programPath: string;
 	try {
 		programPath = await whichMod(program);
@@ -132,7 +132,7 @@ export async function whichSpawn(
 					.on('error', reject)
 					.on('close', resolve);
 			} catch (err) {
-				reject(err);
+				reject(err as Error);
 			}
 		});
 	} catch (err) {

bin/dev.js

@@ -57,7 +57,10 @@ require('ts-node').register({
 	project: path.join(rootDir, 'tsconfig.json'),
 	transpileOnly: true,
 });
-require('../src/app').run(undefined, { dir: __dirname, development: true });
+void require('../src/app').run(undefined, {
+	dir: __dirname,
+	development: true,
+});
 
 // Modify package.json oclif paths from build/ -> src/, or vice versa
 function modifyOclifPaths(revert) {

bin/run.js

@@ -5,7 +5,7 @@
 process.env.UV_THREADPOOL_SIZE = '64';
 
 // Disable oclif registering ts-node
-process.env.OCLIF_TS_NODE = 0;
+process.env.OCLIF_TS_NODE = '0';
 
 async function run() {
 	// Use fast-boot to cache require lookups, speeding up startup
@@ -18,4 +18,4 @@ async function run() {
 	await require('../build/app').run(undefined, { dir: __dirname });
 }
 
-run();
+void run();

eslint.config.js

@@ -0,0 +1,32 @@
+const { FlatCompat } = require('@eslint/eslintrc');
+
+const compat = new FlatCompat({
+	baseDirectory: __dirname,
+});
+module.exports = [
+	...require('@balena/lint/config/eslint.config'),
+	...compat.config({
+		parserOptions: {
+			project: 'tsconfig.dev.json',
+		},
+		ignorePatterns: ['**/generate-completion.js', '**/bin/**/*'],
+		rules: {
+			ignoreDefinitionFiles: 0,
+			'@typescript-eslint/no-non-null-assertion': 'off',
+			'@typescript-eslint/no-shadow': 'off',
+			'@typescript-eslint/no-var-requires': 'off',
+			'@typescript-eslint/no-require-imports': 'off',
+			'@typescript-eslint/no-unnecessary-type-assertion': 'off',
+			'@typescript-eslint/prefer-nullish-coalescing': 'warn',
+
+			'no-restricted-imports': ['error', {
+				paths: ['resin-cli-visuals', 'chalk', 'common-tags', 'resin-cli-form'],
+			}],
+
+			'@typescript-eslint/no-unused-vars': ['error', {
+				argsIgnorePattern: '^_',
+				caughtErrorsIgnorePattern: '^_',
+			}],
+		},
+	}),
+];

package.json

@@ -111,7 +111,7 @@
     }
   },
   "devDependencies": {
-    "@balena/lint": "^8.0.0",
+    "@balena/lint": "^9.1.3",
     "@electron/notarize": "^2.0.0",
     "@types/archiver": "^6.0.2",
     "@types/bluebird": "^3.5.36",

src/commands/api-key/revoke.ts

@@ -50,9 +50,9 @@ export default class RevokeCmd extends Command {
 			return;
 		}
 		await Promise.all(
-			apiKeyIds.map(
-				async (id) => await getBalenaSdk().models.apiKey.revoke(Number(id)),
-			),
+			apiKeyIds.map(async (id) => {
+				await getBalenaSdk().models.apiKey.revoke(Number(id));
+			}),
 		);
 		console.log('Successfully revoked the given API keys');
 	}

src/commands/device/detect.ts

@@ -91,7 +91,7 @@ export default class DeviceDetectCmd extends Command {
 				try {
 					await docker.ping();
 					return true;
-				} catch (err) {
+				} catch {
 					return false;
 				}
 			}),

src/commands/device/init.ts

@@ -155,7 +155,7 @@ export default class DeviceInitCmd extends Command {
 			try {
 				logger.logDebug(`Process failed, removing device ${device.uuid}`);
 				await balena.models.device.remove(device.uuid);
-			} catch (e) {
+			} catch {
 				// Ignore removal failures, and throw original error
 			}
 			throw e;

src/commands/device/logs.ts

@@ -135,7 +135,7 @@ export default class DeviceLogsCmd extends Command {
 			logger.logDebug('Checking we can access device');
 			try {
 				await deviceApi.ping();
-			} catch (e) {
+			} catch {
 				const { ExpectedError } = await import('../../errors');
 				throw new ExpectedError(
 					`Cannot access device at address ${params.device}.  Device may not be in local mode.`,

src/commands/device/register.ts

@@ -76,6 +76,6 @@ export default class DeviceRegisterCmd extends Command {
 			options.deviceType,
 		);
 
-		return result && result.uuid;
+		return result.uuid;
 	}
 }

src/commands/device/ssh.ts

@@ -82,7 +82,7 @@ export default class DeviceSSHCmd extends Command {
 				SSH server port number (default 22222) if the target is an IP address or .local
 				hostname. Otherwise, port number for the balenaCloud gateway (default 22).`,
 			char: 'p',
-			parse: async (p) => parseAsInteger(p, 'port'),
+			parse: (p) => parseAsInteger(p, 'port'),
 		}),
 		tty: Flags.boolean({
 			default: false,
@@ -110,13 +110,14 @@ export default class DeviceSSHCmd extends Command {
 		// Local connection
 		if (validateLocalHostnameOrIp(params.fleetOrDevice)) {
 			const { performLocalDeviceSSH } = await import('../../utils/device/ssh');
-			return await performLocalDeviceSSH({
+			await performLocalDeviceSSH({
 				hostname: params.fleetOrDevice,
 				port: options.port || 'local',
 				forceTTY: options.tty,
 				verbose: options.verbose,
 				service: params.service,
 			});
+			return;
 		}
 
 		// Remote connection
@@ -132,7 +133,7 @@ export default class DeviceSSHCmd extends Command {
 		const useProxy = !!proxyConfig && !options.noproxy;
 
 		// this will be a tunnelled SSH connection...
-		await checkNotUsingOfflineMode();
+		checkNotUsingOfflineMode();
 		await checkLoggedIn();
 		const deviceUuid = await getOnlineTargetDeviceUuid(
 			sdk,

src/commands/env/rename.ts

@@ -41,7 +41,7 @@ export default class EnvRenameCmd extends Command {
 		id: Args.integer({
 			required: true,
 			description: "variable's numeric database ID",
-			parse: async (input) => parseAsInteger(input, 'id'),
+			parse: (input) => parseAsInteger(input, 'id'),
 		}),
 		value: Args.string({
 			required: true,

src/commands/env/rm.ts

@@ -46,7 +46,7 @@ export default class EnvRmCmd extends Command {
 		id: Args.integer({
 			required: true,
 			description: "variable's numeric database ID",
-			parse: async (input) => parseAsInteger(input, 'id'),
+			parse: (input) => parseAsInteger(input, 'id'),
 		}),
 	};
 

src/commands/local/configure.ts

@@ -252,10 +252,7 @@ export default class LocalConfigureCmd extends Command {
 					`${this.CONNECTIONS_FOLDER}/resin-sample.ignore`,
 					{ encoding: 'utf8' },
 				);
-				return await writeFileAsync(
-					`${this.CONNECTIONS_FOLDER}/resin-wifi`,
-					contents,
-				);
+				await writeFileAsync(`${this.CONNECTIONS_FOLDER}/resin-wifi`, contents);
 			});
 		} else if (_.includes(files, 'resin-sample')) {
 			// Legacy mode, to be removed later
@@ -269,13 +266,13 @@ export default class LocalConfigureCmd extends Command {
 		} else {
 			// In case there's no file at all (shouldn't happen normally, but the file might have been removed)
 			await imagefs.interact(target, bootPartition, async (_fs) => {
-				return await promisify(_fs.writeFile)(
+				await promisify(_fs.writeFile)(
 					`${this.CONNECTIONS_FOLDER}/resin-wifi`,
 					this.CONNECTION_FILE,
 				);
 			});
 		}
-		return await this.getConfigurationSchema(bootPartition, connectionFileName);
+		return this.getConfigurationSchema(bootPartition, connectionFileName);
 	}
 
 	async removeHostname(schema: any) {

src/commands/login/index.ts

@@ -132,7 +132,7 @@ export default class LoginCmd extends Command {
 		// We can safely assume this won't be undefined as doLogin will throw if this call fails
 		// We also don't need to worry too much about the amount of calls to whoami
 		// as these are cached by the SDK
-		const whoamiResult = (await balena.auth.whoami()) as WhoamiResult;
+		const whoamiResult = (await balena.auth.whoami())!;
 
 		if (whoamiResult.actorType !== 'user' && !options.hideExperimentalWarning) {
 			console.info(stripIndent`
@@ -168,7 +168,7 @@ ${messages.reachingOut}`);
 
 	async doLogin(
 		loginOptions: FlagsDef,
-		balenaUrl: string = 'balena-cloud.com',
+		balenaUrl = 'balena-cloud.com',
 		token?: string,
 	): Promise<void> {
 		// Token

src/commands/os/configure.ts

@@ -292,7 +292,7 @@ export default class OsConfigureCmd extends Command {
 
 			for (const { name, content } of files) {
 				await imagefs.interact(image, bootPartition, async (_fs) => {
-					return await promisify(_fs.writeFile)(
+					await promisify(_fs.writeFile)(
 						path.join(CONNECTIONS_FOLDER, name),
 						content,
 					);

src/commands/preload/index.ts

@@ -109,7 +109,7 @@ https://github.com/balena-io-examples/staged-releases\
 		'additional-space': Flags.integer({
 			description:
 				'expand the image by this amount of bytes instead of automatically estimating the required amount',
-			parse: async (x) => parseAsInteger(x, 'additional-space'),
+			parse: (x) => parseAsInteger(x, 'additional-space'),
 		}),
 		'add-certificate': Flags.string({
 			description: `\
@@ -126,7 +126,7 @@ Can be repeated to add multiple certificates.\
 		dockerPort: Flags.integer({
 			description:
 				'Docker daemon TCP port number (hint: 2375 for balena devices)',
-			parse: async (p) => parseAsInteger(p, 'dockerPort'),
+			parse: (p) => parseAsInteger(p, 'dockerPort'),
 		}),
 	};
 
@@ -155,7 +155,7 @@ Can be repeated to add multiple certificates.\
 					------------------------------------------------------------------------------
 					`);
 			}
-		} catch (error) {
+		} catch {
 			throw new ExpectedError(
 				`The provided image path does not exist: ${params.image}`,
 			);
@@ -192,11 +192,11 @@ Can be repeated to add multiple certificates.\
 				event.name,
 			));
 			if (event.action === 'start') {
-				return spinner.start();
-			} else {
-				console.log();
-				return spinner.stop();
+				spinner.start();
+				return;
 			}
+			console.log();
+			spinner.stop();
 		};
 
 		const commit = this.isCurrentCommit(options.commit || '')

src/commands/release/index.ts

@@ -24,7 +24,7 @@ import { tryAsInteger } from '../../utils/validation';
 import { jsonInfo } from '../../utils/messages';
 
 export const commitOrIdArg = Args.custom({
-	parse: async (commitOrId: string) => tryAsInteger(commitOrId),
+	parse: tryAsInteger,
 });
 
 type FlagsDef = Interfaces.InferredFlags<typeof ReleaseCmd.flags>;

src/commands/ssh-key/index.ts

@@ -34,7 +34,7 @@ export default class SSHKeyCmd extends Command {
 	public static args = {
 		id: Args.integer({
 			description: 'balenaCloud ID for the SSH key',
-			parse: async (x) => parseAsInteger(x, 'id'),
+			parse: (x) => parseAsInteger(x, 'id'),
 			required: true,
 		}),
 	};

src/commands/ssh-key/rm.ts

@@ -40,7 +40,7 @@ export default class SSHKeyRmCmd extends Command {
 	public static args = {
 		id: Args.integer({
 			description: 'balenaCloud ID for the SSH key',
-			parse: async (x) => parseAsInteger(x, 'id'),
+			parse: (x) => parseAsInteger(x, 'id'),
 			required: true,
 		}),
 	};

src/commands/version/index.ts

@@ -69,10 +69,9 @@ export default class VersionCmd extends Command {
 		const { flags: options } = await this.parse(VersionCmd);
 		const versions: JsonVersions = {
 			'balena-cli': (await import('../../../package.json')).version,
-			'Node.js':
-				process.version && process.version.startsWith('v')
-					? process.version.slice(1)
-					: process.version,
+			'Node.js': process.version.startsWith('v')
+				? process.version.slice(1)
+				: process.version,
 		};
 		if (options.json) {
 			console.log(JSON.stringify(versions, null, 4));

src/errors.ts

@@ -93,7 +93,7 @@ function interpret(error: Error): string {
 
 	if (hasCode(error)) {
 		const errorCodeHandler = messages[error.code];
-		const message = errorCodeHandler && errorCodeHandler(error);
+		const message = errorCodeHandler?.(error);
 
 		if (message) {
 			return message;
@@ -229,7 +229,7 @@ async function sentryCaptureException(error: Error) {
 	Sentry.captureException(error);
 	try {
 		await Sentry.close(1000);
-	} catch (e) {
+	} catch {
 		if (process.env.DEBUG) {
 			console.error('[debug] Timeout reporting error to sentry.io');
 		}

src/help.ts

@@ -209,12 +209,12 @@ See: https://git.io/JRHUW#deprecation-policy`,
 		return indent(body, 2);
 	}
 
-	protected formatDescription(desc: string = '') {
+	protected formatDescription(desc = '') {
 		const chalk = getChalk();
 
 		desc = desc.split('\n')[0];
 		// Remove any ending .
-		if (desc[desc.length - 1] === '.') {
+		if (desc.endsWith('.')) {
 			desc = desc.substring(0, desc.length - 1);
 		}
 		// Lowercase first letter if second char is lowercase, to preserve e.g. 'SSH ...')

src/hooks/prerun.ts

@@ -103,7 +103,7 @@ const hook: Hook<'prerun'> = async function (options) {
 					.offlineCompatible ?? DEFAULT_OFFLINE_COMPATIBLE
 			)
 		) {
-			await checkNotUsingOfflineMode();
+			checkNotUsingOfflineMode();
 		}
 	} catch (error) {
 		this.error(error);

src/preparser.ts

@@ -48,7 +48,7 @@ export async function preparseArgs(argv: string[]): Promise<string[]> {
 		if (
 			cmdSlice.length > 1 &&
 			cmdSlice[0] === 'help' &&
-			cmdSlice[1][0] !== '-'
+			!cmdSlice[1].startsWith('-')
 		) {
 			cmdSlice.shift();
 			cmdSlice.push('--help');

src/utils/cloud.ts

@@ -164,9 +164,8 @@ export async function downloadOSImage(
 	stream.on('progress', (state: any) => {
 		if (state != null) {
 			return bar.update(state);
-		} else {
-			return spinner.start();
 		}
+		spinner.start();
 	});
 
 	stream.on('end', () => {

src/utils/compose.ts

@@ -386,7 +386,7 @@ export class BuildProgressUI implements Renderer {
 			.map(function (service) {
 				const stream = through.obj(function (event, _enc, cb) {
 					eventHandler(service, event);
-					return cb();
+					cb();
 				});
 				stream.pipe(tty.stream, { end: false });
 				return [service, stream];
@@ -471,17 +471,20 @@ export class BuildProgressUI implements Renderer {
 				const { status, progress, error } = serviceToDataMap[service] ?? {};
 				if (error) {
 					return `${error}`;
-				} else if (progress) {
+				}
+
+				if (progress) {
 					const bar = renderProgressBar(progress, 20);
 					if (status) {
 						return `${bar} ${status}`;
 					}
-					return `${bar}`;
-				} else if (status) {
-					return `${status}`;
-				} else {
-					return 'Waiting...';
+					return bar;
 				}
+
+				if (status) {
+					return status;
+				}
+				return 'Waiting...';
 			})
 			.map((data, index) => [services[index], data])
 			.fromPairs()
@@ -552,7 +555,7 @@ export class BuildProgressInline implements Renderer {
 			.map(function (service) {
 				const stream = through.obj(function (event, _enc, cb) {
 					eventHandler(service, event);
-					return cb();
+					cb();
 				});
 				stream.pipe(outStream, { end: false });
 				return [service, stream];
@@ -606,11 +609,11 @@ export class BuildProgressInline implements Renderer {
 			const { status, error } = event;
 			if (error) {
 				return `${error}`;
-			} else if (status) {
-				return `${status}`;
-			} else {
-				return 'Waiting...';
 			}
+			if (status) {
+				return status;
+			}
+			return 'Waiting...';
 		})();
 
 		const prefix = _.padEnd(getChalk().bold(service), this._prefixWidth);

src/utils/compose_ts.ts

@@ -966,7 +966,7 @@ export async function makeBuildTasks(
 	deviceInfo: DeviceInfo,
 	logger: Logger,
 	projectName: string,
-	releaseHash: string = 'unavailable',
+	releaseHash = 'unavailable',
 	preprocessHook?: (dockerfile: string) => string,
 ): Promise<MultiBuild.BuildTask[]> {
 	const multiBuild = await import('@balena/compose/dist/multibuild');
@@ -1492,7 +1492,7 @@ export function createRunLoop(tick: (...args: any[]) => void) {
 		},
 		end() {
 			clearInterval(timerId);
-			return runloop.onEnd();
+			runloop.onEnd();
 		},
 	};
 	return runloop;
@@ -1549,7 +1549,7 @@ function dropEmptyLinesStream() {
 		if (str.trim()) {
 			this.push(str);
 		}
-		return cb();
+		cb();
 	});
 }
 
@@ -1570,7 +1570,7 @@ function buildLogCapture(objectMode: boolean, buffer: string[]) {
 			buffer.push(data);
 		}
 
-		return cb(null, data);
+		cb(null, data);
 	});
 }
 
@@ -1585,14 +1585,16 @@ function buildProgressAdapter(inline: boolean) {
 
 	return through({ objectMode: true }, function (str, _enc, cb) {
 		if (str == null) {
-			return cb(null, str);
+			cb(null, str);
+			return;
 		}
 
 		if (inline) {
-			return cb(null, { status: str });
+			cb(null, { status: str });
+			return;
 		}
 
-		if (!/^Successfully tagged /.test(str)) {
+		if (!str.startsWith('Successfully tagged ')) {
 			const match = stepRegex.exec(str);
 			if (match) {
 				step = match[1];
@@ -1607,7 +1609,7 @@ function buildProgressAdapter(inline: boolean) {
 			}
 		}
 
-		return cb(null, { status: str, progress });
+		cb(null, { status: str, progress });
 	});
 }
 

src/utils/config.ts

@@ -81,7 +81,7 @@ export async function generateApplicationConfig(
 	)) as ImgConfig;
 
 	// merge sshKeys to config, when they have been specified
-	if (options.os && options.os.sshKeys) {
+	if (options.os?.sshKeys) {
 		// Create config.os object if it does not exist
 		config.os = config.os ? config.os : {};
 		config.os.sshKeys = config.os.sshKeys

src/utils/deploy-legacy.ts

@@ -86,7 +86,7 @@ const uploadToPromise = (uploadRequest: Request, logger: Logger) =>
 				obj = JSON.parse(data);
 			} catch (e) {
 				logger.logError('Error parsing reply from remote side');
-				reject(e);
+				reject(e as Error);
 				return;
 			}
 
@@ -232,7 +232,7 @@ export const deployLegacy = async function (
 			username,
 			appName,
 		]);
-		await uploadLogs(...args);
+		uploadLogs(...args);
 	}
 
 	return buildId;

src/utils/device/api.ts

@@ -74,7 +74,7 @@ export class DeviceAPI {
 	public constructor(
 		private logger: Logger,
 		addr: string,
-		port: number = 48484,
+		port = 48484,
 	) {
 		this.deviceAddress = `http://${addr}:${port}/`;
 	}
@@ -201,7 +201,7 @@ export class DeviceAPI {
 		return new Promise((resolve, reject) => {
 			const req = request.get(url);
 
-			req.on('error', reject).on('response', async (res) => {
+			req.on('error', reject).on('response', (res) => {
 				if (res.statusCode !== 200) {
 					reject(
 						new ApiErrors.DeviceAPIError(
@@ -213,7 +213,7 @@ export class DeviceAPI {
 				try {
 					res.socket.setKeepAlive(true, 1000);
 				} catch (error) {
-					reject(error);
+					reject(error as Error);
 				}
 				resolve(res);
 			});
@@ -238,7 +238,7 @@ export class DeviceAPI {
 			if (_.isObject(opts) && (opts as ObjectWithUrl).url != null) {
 				// the `as string` shouldn't be necessary, but the type system
 				// is getting a little confused
-				url = (opts as ObjectWithUrl).url as string;
+				url = (opts as ObjectWithUrl).url!;
 			} else if (typeof opts === 'string') {
 				url = opts;
 			}
@@ -252,21 +252,26 @@ export class DeviceAPI {
 			return await new Promise((resolve, reject) => {
 				return request(opts, (err, response, body) => {
 					if (err) {
-						return reject(err);
+						reject(err as Error);
+						return;
 					}
 					switch (response.statusCode) {
-						case 200:
-							return resolve(body);
-						case 400:
-							return reject(
-								new ApiErrors.BadRequestDeviceAPIError(body.message),
-							);
-						case 503:
-							return reject(
-								new ApiErrors.ServiceUnavailableAPIError(body.message),
-							);
-						default:
-							return reject(new ApiErrors.DeviceAPIError(body.message));
+						case 200: {
+							resolve(body);
+							return;
+						}
+						case 400: {
+							reject(new ApiErrors.BadRequestDeviceAPIError(body.message));
+							return;
+						}
+						case 503: {
+							reject(new ApiErrors.ServiceUnavailableAPIError(body.message));
+							return;
+						}
+						default: {
+							reject(new ApiErrors.DeviceAPIError(body.message));
+							return;
+						}
 					}
 				});
 			});

src/utils/device/deploy.ts

@@ -74,11 +74,11 @@ interface ParsedEnvironment {
 	[serviceName: string]: { [key: string]: string };
 }
 
-async function environmentFromInput(
+function environmentFromInput(
 	envs: string[],
 	serviceNames: string[],
 	logger: Logger,
-): Promise<ParsedEnvironment> {
+): ParsedEnvironment {
 	// A normal environment variable regex, with an added part
 	// to find a colon followed servicename at the start
 	const varRegex = /^(?:([^\s:]+):)?([^\s]+?)=(.*)$/;
@@ -143,7 +143,7 @@ export async function deployToDevice(opts: DeviceDeployOptions): Promise<void> {
 	try {
 		globalLogger.logDebug('Checking we can access device');
 		await api.ping();
-	} catch (e) {
+	} catch {
 		throw new ExpectedError(stripIndent`
 			Could not communicate with device supervisor at address ${opts.deviceHost}:${port}.
 			Device may not have local mode enabled. Check with:
@@ -191,10 +191,7 @@ export async function deployToDevice(opts: DeviceDeployOptions): Promise<void> {
 	});
 
 	// Attempt to attach to the device's docker daemon
-	const docker = connectToDocker(
-		opts.deviceHost,
-		opts.devicePort != null ? opts.devicePort : 2375,
-	);
+	const docker = connectToDocker(opts.deviceHost, opts.devicePort ?? 2375);
 
 	await checkBuildSecretsRequirements(docker, opts.source);
 	globalLogger.logDebug('Tarring all non-ignored files...');
@@ -231,7 +228,7 @@ export async function deployToDevice(opts: DeviceDeployOptions): Promise<void> {
 	// Print a newline to clearly separate build time and runtime
 	console.log();
 
-	const envs = await environmentFromInput(
+	const envs = environmentFromInput(
 		opts.env,
 		Object.getOwnPropertyNames(project.composition.services),
 		globalLogger,
@@ -388,7 +385,7 @@ async function performBuilds(
 	);
 
 	// Check for failures
-	await inspectBuildResults(localImages);
+	inspectBuildResults(localImages);
 
 	const imagesToRemove: string[] = [];
 
@@ -497,7 +494,7 @@ export async function rebuildSingleTask(
 	}
 
 	await assignDockerBuildOpts(docker, [task], opts);
-	await assignOutputHandlers([task], logger, logHandler);
+	assignOutputHandlers([task], logger, logHandler);
 
 	const [localImage] = await multibuild.performBuilds(
 		[task],
@@ -568,7 +565,7 @@ async function assignDockerBuildOpts(
 	globalLogger.logDebug(`Using ${images.length} on-device images for cache...`);
 
 	await Promise.all(
-		buildTasks.map(async (task: BuildTask) => {
+		buildTasks.map((task: BuildTask) => {
 			task.dockerOpts = {
 				...(task.dockerOpts || {}),
 				...{
@@ -666,7 +663,7 @@ export function generateTargetState(
 	return targetState;
 }
 
-async function inspectBuildResults(images: LocalImage[]): Promise<void> {
+function inspectBuildResults(images: LocalImage[]): void {
 	const failures: LocalPushErrors.BuildFailure[] = [];
 
 	_.each(images, (image) => {
@@ -679,6 +676,6 @@ async function inspectBuildResults(images: LocalImage[]): Promise<void> {
 	});
 
 	if (failures.length > 0) {
-		throw new LocalPushErrors.BuildError(failures).toString();
+		throw new LocalPushErrors.BuildError(failures);
 	}
 }

src/utils/device/live.ts

@@ -191,8 +191,8 @@ export class LivepushManager {
 					);
 					const eventQueue = this.updateEventsWaiting[$serviceName];
 					eventQueue.push(changedPath);
-					// eslint-disable-next-line @typescript-eslint/no-floating-promises
-					this.getDebouncedEventHandler($serviceName)();
+
+					void this.getDebouncedEventHandler($serviceName)();
 				};
 
 				const monitor = this.setupFilesystemWatcher(
@@ -252,7 +252,7 @@ export class LivepushManager {
 					try {
 						// sync because chokidar defines a sync interface
 						stats = fs.lstatSync(filePath);
-					} catch (err) {
+					} catch {
 						// OK: the file may have been deleted. See also:
 						// https://github.com/paulmillr/chokidar/blob/3.4.3/lib/fsevents-handler.js#L326-L328
 						// https://github.com/paulmillr/chokidar/blob/3.4.3/lib/nodefs-handler.js#L364
@@ -267,15 +267,15 @@ export class LivepushManager {
 				return dockerignore.ignores(relPath);
 			},
 		});
-		monitor.on('add', (changedPath: string) =>
-			changedPathHandler(serviceName, changedPath),
-		);
-		monitor.on('change', (changedPath: string) =>
-			changedPathHandler(serviceName, changedPath),
-		);
-		monitor.on('unlink', (changedPath: string) =>
-			changedPathHandler(serviceName, changedPath),
-		);
+		monitor.on('add', (changedPath: string) => {
+			changedPathHandler(serviceName, changedPath);
+		});
+		monitor.on('change', (changedPath: string) => {
+			changedPathHandler(serviceName, changedPath);
+		});
+		monitor.on('unlink', (changedPath: string) => {
+			changedPathHandler(serviceName, changedPath);
+		});
 		return monitor;
 	}
 

src/utils/docker.ts

@@ -57,7 +57,7 @@ export const dockerConnectionCliFlags = {
 		description:
 			'Docker daemon TCP port number (hint: 2375 for balena devices)',
 		char: 'p',
-		parse: async (p) => parseAsInteger(p, 'dockerPort'),
+		parse: (p) => parseAsInteger(p, 'dockerPort'),
 	}),
 	ca: Flags.string({
 		description: 'Docker host TLS certificate authority file',
@@ -169,9 +169,7 @@ export async function isBalenaEngine(docker: dockerode): Promise<boolean> {
 	// version of balenaEngine, but it was at one point (mis)spelt 'balaena':
 	// https://github.com/balena-os/balena-engine/pull/32/files
 	const dockerVersion = (await docker.version()) as BalenaEngineVersion;
-	return !!(
-		dockerVersion.Engine && dockerVersion.Engine.match(/balena|balaena/)
-	);
+	return !!dockerVersion.Engine?.match(/balena|balaena/);
 }
 
 export async function getDocker(

src/utils/eol-conversion.ts

@@ -84,7 +84,7 @@ export async function readFileWithEolConversion(
 	}
 
 	// Analyse encoding
-	const encoding = await detectEncoding(fileBuffer);
+	const encoding = detectEncoding(fileBuffer);
 
 	// Skip further processing of non-convertible encodings
 	if (!CONVERTIBLE_ENCODINGS.includes(encoding)) {
@@ -132,10 +132,10 @@ export async function readFileWithEolConversion(
  * @param fileBuffer File contents whose encoding should be detected
  * @param bytesRead Optional "file size" if smaller than the buffer size
  */
-export async function detectEncoding(
+export function detectEncoding(
 	fileBuffer: Buffer,
 	bytesRead = fileBuffer.length,
-): Promise<string> {
+): string {
 	// empty file
 	if (bytesRead === 0) {
 		return '';

src/utils/helpers.ts

@@ -281,8 +281,7 @@ export function isWindowsComExeShell() {
 		// neither bash nor sh (e.g. not MSYS, MSYS2, Cygwin, WSL)
 		process.env.SHELL == null &&
 		// Windows cmd.exe or PowerShell
-		process.env.ComSpec != null &&
-		process.env.ComSpec.endsWith('cmd.exe')
+		process.env.ComSpec?.endsWith('cmd.exe')
 	);
 }
 
@@ -366,7 +365,7 @@ export function getProxyConfig(): ProxyConfig | undefined {
 			let url: InstanceType<typeof URL>;
 			try {
 				url = new URL(proxyUrl);
-			} catch (_e) {
+			} catch {
 				return;
 			}
 			return {
@@ -469,7 +468,7 @@ export function pickAndRename<T extends Dictionary<any>>(
 		let renameFrom = f;
 		let renameTo = f;
 		const match = f.match(/(?<from>\S+)\s+=>\s+(?<to>\S+)/);
-		if (match && match.groups) {
+		if (match?.groups) {
 			renameFrom = match.groups.from;
 			renameTo = match.groups.to;
 		}

src/utils/image-manager.ts

@@ -118,7 +118,7 @@ export const isImageFresh = async (deviceType: string, version: string) => {
  */
 export const isESR = (version: string) => {
 	const match = version.match(/^v?(\d+)\.\d+\.\d+/);
-	const major = parseInt((match && match[1]) || '', 10);
+	const major = parseInt(match?.[1] || '', 10);
 	return major >= 2018; // note: (NaN >= 2018) is false
 };
 

src/utils/normalization.ts

@@ -39,7 +39,7 @@ export async function disambiguateReleaseParam(
 
 	// Accepting short hashes of 7,8,9 chars.
 	const possibleUuidHashLength = [7, 8, 9, 32, 40, 62].includes(release.length);
-	const hasLeadingZero = release[0] === '0';
+	const hasLeadingZero = release.startsWith('0');
 	const isOnlyNumerical = /^[0-9]+$/.test(release);
 
 	// Reject non-numerical values with invalid uuid/hash lengths
@@ -78,14 +78,16 @@ export async function disambiguateReleaseParam(
 /**
  * Convert to lowercase if looks like slug
  */
-export async function lowercaseIfSlug(s: string) {
-	return s.includes('/') ? s.toLowerCase() : s;
+export function lowercaseIfSlug(s: string) {
+	return s.includes('/')
+		? Promise.resolve(s.toLowerCase())
+		: Promise.resolve(s);
 }
 
 export function normalizeOsVersion(version: string) {
 	// Note that `version` may also be 'latest', 'recommended', 'default'
 	if (/^v?\d+\.\d+\.\d+/.test(version)) {
-		if (version[0] === 'v') {
+		if (version.startsWith('v')) {
 			version = version.slice(1);
 		}
 	}

src/utils/oclif-utils.ts

@@ -25,7 +25,7 @@ export function capitanoizeOclifUsage(
 		.toLowerCase();
 }
 
-export async function getCommandsFromManifest() {
+export function getCommandsFromManifest() {
 	const manifest = require('../../oclif.manifest.json');
 
 	if (manifest.commands == null) {

src/utils/patterns.ts

@@ -119,7 +119,7 @@ export const checkLoggedInIf = async (doCheck: boolean) => {
  *
  * @throws {NotAvailableInOfflineModeError}
  */
-export const checkNotUsingOfflineMode = async () => {
+export const checkNotUsingOfflineMode = () => {
 	if (process.env.BALENARC_OFFLINE_MODE) {
 		throw new NotAvailableInOfflineModeError(stripIndent`
 	This command requires an internet connection, and cannot be used in offline mode.

src/utils/promote.ts

@@ -390,13 +390,12 @@ async function createApplication(
 	try {
 		const userInfo = await sdk.auth.getUserInfo();
 		username = userInfo.username;
-	} catch (err) {
+	} catch {
 		throw new sdk.errors.BalenaNotLoggedIn();
 	}
 
 	// eslint-disable-next-line no-async-promise-executor
 	const applicationName = await new Promise<string>(async (resolve, reject) => {
-		// eslint-disable-next-line no-constant-condition
 		while (true) {
 			try {
 				const appName = await getCliForm().ask({
@@ -418,11 +417,13 @@ async function createApplication(
 						'You already have a fleet with that name; please choose another.',
 					);
 					continue;
-				} catch (err) {
-					return resolve(appName);
+				} catch {
+					resolve(appName);
+					return;
 				}
 			} catch (err) {
-				return reject(err);
+				reject(err as Error);
+				return;
 			}
 		}
 	});
@@ -452,9 +453,7 @@ async function generateApplicationConfig(
 	const manifest = await sdk.models.config.getDeviceTypeManifestBySlug(
 		app.is_for__device_type[0].slug,
 	);
-	const opts =
-		manifest.options &&
-		manifest.options.filter((opt) => opt.name !== 'network');
+	const opts = manifest.options?.filter((opt) => opt.name !== 'network');
 
 	const override = {
 		appUpdatePollInterval: options.appUpdatePollInterval,

src/utils/qemu.ts

@@ -114,7 +114,7 @@ async function installQemu(arch: string, qemuPath: string) {
 						stream.resume();
 					}
 				} catch (err) {
-					reject(err);
+					reject(err as Error);
 				}
 			});
 			request(qemuUrl)

src/utils/remote-build.ts

@@ -246,7 +246,8 @@ function getBuilderMessageHandler(
 			console.error(`[debug] handling message: ${JSON.stringify(obj)}`);
 		}
 		if (obj.type != null && obj.type === 'metadata') {
-			return handleBuilderMetadata(obj, build);
+			handleBuilderMetadata(obj, build);
+			return;
 		}
 		if (obj.message) {
 			readline.clearLine(process.stdout, 0);
@@ -423,10 +424,20 @@ async function getRemoteBuildStream(
 		stream = buildRequest.pipe(JSONStream.parse('*')) as NodeJS.ReadStream;
 	}
 	stream = stream
-		.once('error', () => uploadSpinner.stop())
-		.once('close', () => uploadSpinner.stop())
-		.once('data', () => uploadSpinner.stop())
-		.once('end', () => uploadSpinner.stop())
-		.once('finish', () => uploadSpinner.stop());
+		.once('error', () => {
+			uploadSpinner.stop();
+		})
+		.once('close', () => {
+			uploadSpinner.stop();
+		})
+		.once('data', () => {
+			uploadSpinner.stop();
+		})
+		.once('end', () => {
+			uploadSpinner.stop();
+		})
+		.once('finish', () => {
+			uploadSpinner.stop();
+		});
 	return [buildRequest, stream];
 }

src/utils/ssh.ts

@@ -73,7 +73,7 @@ export function sshArgsForRemoteCommand({
 		...['-o', 'LogLevel=ERROR'],
 		...['-o', 'StrictHostKeyChecking=no'],
 		...['-o', 'UserKnownHostsFile=/dev/null'],
-		...(proxyCommand && proxyCommand.length
+		...(proxyCommand?.length
 			? ['-o', `ProxyCommand=${proxyCommand.join(' ')}`]
 			: []),
 		`${username}@${hostname}`,
@@ -155,9 +155,9 @@ export async function runRemoteCommand({
 		[exitCode, exitSignal] = await new Promise((resolve, reject) => {
 			const ps = spawn(program, args, { stdio })
 				.on('error', reject)
-				.on('close', (code, signal) =>
-					resolve([code ?? undefined, signal ?? undefined]),
-				);
+				.on('close', (code, signal) => {
+					resolve([code ?? undefined, signal ?? undefined]);
+				});
 
 			if (ps.stdin && stdin && typeof stdin !== 'string') {
 				stdin.pipe(ps.stdin);
@@ -272,7 +272,7 @@ export async function getLocalDeviceCmdStdout(
 export const isRootUserGood = _.memoize(async (hostname: string, port) => {
 	try {
 		await runRemoteCommand({ cmd: 'exit 0', hostname, port, ...stdioIgnore });
-	} catch (e) {
+	} catch {
 		return false;
 	}
 	return true;

src/utils/streams.ts

@@ -29,7 +29,11 @@ export function buffer(
 			new Promise(function (resolve, reject) {
 				const fstream = fs.createReadStream(bufferFile);
 
-				fstream.on('open', () => resolve(fstream)).on('error', reject);
+				fstream
+					.on('open', () => {
+						resolve(fstream);
+					})
+					.on('error', reject);
 			}),
 	);
 }

src/utils/sudo.ts

@@ -105,7 +105,7 @@ async function spawnAndPipe(
 	});
 }
 
-async function windosuExec(
+function windosuExec(
 	escapedArgs: string[],
 	stderr?: NodeJS.WritableStream,
 ): Promise<void> {

src/utils/tty.ts

@@ -42,9 +42,9 @@ export = (stream: NodeJS.WriteStream = process.stdout) => {
 
 	const showCursor = () => stream.write('\u001B[?25h');
 
-	const cursorUp = (rows: number = 0) => stream.write(`\u001B[${rows}A`);
+	const cursorUp = (rows = 0) => stream.write(`\u001B[${rows}A`);
 
-	const cursorDown = (rows: number = 0) => stream.write(`\u001B[${rows}B`);
+	const cursorDown = (rows = 0) => stream.write(`\u001B[${rows}B`);
 
 	const write = (str: string) => stream.write(str);
 

src/utils/tunnel.ts

@@ -61,11 +61,11 @@ export const tunnelConnectionToDevice = (
 					client.pipe(remote);
 					remote.pipe(client);
 					remote.on('error', (err) => {
-						console.error('Remote: ' + err);
+						console.error(`Remote: ${err}`);
 						client.end();
 					});
 					client.on('error', (err) => {
-						console.error('Client: ' + err);
+						console.error(`Client: ${err}`);
 						remote.end();
 					});
 					remote.on('close', () => {

src/utils/validation.ts

@@ -97,24 +97,24 @@ export function parseAsInteger(input: string, paramName?: string) {
 		throw new ExpectedError(message);
 	}
 
-	return Number(input);
+	return Promise.resolve(Number(input));
 }
 
-export function tryAsInteger(input: string): number | string {
+export async function tryAsInteger(input: string): Promise<number | string> {
 	try {
-		return parseAsInteger(input);
+		return await parseAsInteger(input);
 	} catch {
 		return input;
 	}
 }
 
-export async function parseAsLocalHostnameOrIp(input: string) {
+export function parseAsLocalHostnameOrIp(input: string) {
 	if (input && !validateLocalHostnameOrIp(input)) {
 		throw new ExpectedError(
 			'The parameter must be a local hostname or IP address.',
 		);
 	}
-	return input;
+	return Promise.resolve(input);
 }
 
 export function looksLikeFleetSlug(input: string) {

tests/auth/server.spec.ts

@@ -31,7 +31,7 @@ chai.use(chaiAsPromised);
 
 const { expect } = chai;
 
-async function getPage(name: string): Promise<string> {
+function getPage(name: string): string {
 	const pagePath = path.join(
 		__dirname,
 		'..',
@@ -88,7 +88,7 @@ describe('Login server:', function () {
 						expect(body).to.equal(opt.expectedBody);
 						resolve();
 					} catch (err) {
-						reject(err);
+						reject(err as Error);
 					}
 				},
 			);
@@ -143,7 +143,7 @@ describe('Login server:', function () {
 
 		it('should eventually be the token', async () => {
 			await testLogin({
-				expectedBody: await getPage('success'),
+				expectedBody: getPage('success'),
 				expectedStatusCode: 200,
 				expectedToken: tokens.johndoe.token,
 			});
@@ -162,7 +162,7 @@ describe('Login server:', function () {
 
 		it('should be rejected', async () => {
 			await testLogin({
-				expectedBody: await getPage('error'),
+				expectedBody: getPage('error'),
 				expectedStatusCode: 401,
 				expectedToken: tokens.johndoe.token,
 				expectedErrorMsg: 'Invalid token',
@@ -171,7 +171,7 @@ describe('Login server:', function () {
 
 		it('should be rejected if no token', async () => {
 			await testLogin({
-				expectedBody: await getPage('error'),
+				expectedBody: getPage('error'),
 				expectedStatusCode: 401,
 				expectedToken: '',
 				expectedErrorMsg: 'No token',
@@ -180,7 +180,7 @@ describe('Login server:', function () {
 
 		it('should be rejected if token is malformed', async () => {
 			await testLogin({
-				expectedBody: await getPage('error'),
+				expectedBody: getPage('error'),
 				expectedStatusCode: 401,
 				expectedToken: 'asdf',
 				expectedErrorMsg: 'Invalid token',

tests/commands/build.spec.ts

@@ -267,15 +267,15 @@ describe('balena build', function () {
 				...fsMod,
 				promises: {
 					...fsMod.promises,
-					access: async (p: string) =>
+					access: (p: string) =>
 						p === qemuBinPath ? undefined : fsMod.promises.access(p),
-					stat: async (p: string) =>
+					stat: (p: string) =>
 						p === qemuBinPath ? { size: 1 } : fsMod.promises.stat(p),
 				},
 			});
 			mock(qemuModPath, {
 				...qemuMod,
-				copyQemu: async () => '',
+				copyQemu: () => '',
 			});
 			mock.reRequire('../../build/utils/qemu');
 			docker.expectGetInfo({ OperatingSystem: 'balenaOS 2.44.0+rev1' });

tests/commands/device/ssh.spec.ts

@@ -169,8 +169,12 @@ async function startMockSshServer(): Promise<[Server, number]> {
 				console.error(`[debug] mock ssh server: ${msg}`);
 			}
 		};
-		c.on('error', (err) => handler(err.message));
-		c.on('end', () => handler('client disconnected'));
+		c.on('error', (err) => {
+			handler(err.message);
+		});
+		c.on('end', () => {
+			handler('client disconnected');
+		});
 		c.end();
 	});
 	server.on('error', (err) => {

tests/commands/push.spec.ts

@@ -462,7 +462,13 @@ describe('balena push', function () {
 		tmp.setGracefulCleanup();
 		const projectPath = await new Promise<string>((resolve, reject) => {
 			const opts = { template: 'tmp-XXXXXX', unsafeCleanup: true };
-			tmp.dir(opts, (e, p) => (e ? reject(e) : resolve(p)));
+			tmp.dir(opts, (e, p) => {
+				if (e) {
+					reject(e);
+				} else {
+					resolve(p);
+				}
+			});
 		});
 		console.error(`[debug] Temp project dir: ${projectPath}`);
 
@@ -475,7 +481,7 @@ describe('balena push', function () {
 			try {
 				server.listen(socketPath, resolve);
 			} catch (e) {
-				reject(e);
+				reject(e as Error);
 			}
 		});
 		console.error(`[debug] Checking existence of socket at '${socketPath}'`);
@@ -505,7 +511,13 @@ describe('balena push', function () {
 
 		// Terminate Unix Domain Socket server
 		await new Promise<void>((resolve, reject) => {
-			server.close((e) => (e ? reject(e) : resolve()));
+			server.close((e) => {
+				if (e) {
+					reject(e);
+				} else {
+					resolve();
+				}
+			});
 		});
 
 		expect(await exists(socketPath), 'Socket existence').to.be.false;

tests/commands/whoami.spec.ts

@@ -26,7 +26,7 @@ describe('balena whoami', function () {
 		api = new BalenaAPIMock();
 	});
 
-	this.afterEach(async () => {
+	this.afterEach(() => {
 		// Check all expected api calls have been made and clean up.
 		api.done();
 	});

tests/docker-build.ts

@@ -26,7 +26,6 @@ import * as tar from 'tar-stream';
 import { streamToBuffer } from 'tar-utils';
 import { URL } from 'url';
 import { diff } from 'deep-object-diff';
-
 import { makeImageName } from '../build/utils/compose_ts';
 import { stripIndent } from '../build/utils/lazy';
 import type { BuilderMock } from './nock/builder-mock';
@@ -77,13 +76,13 @@ export async function inspectTarStream(
 						type: header.type,
 					};
 					const expected = expectedFiles[header.name];
-					if (expected && expected.testStream) {
+					if (expected?.testStream) {
 						await expected.testStream(header, stream, expected);
 					} else {
 						await defaultTestStream(header, stream, expected, projectPath);
 					}
 				} catch (err) {
-					reject(err);
+					reject(err as Error);
 				}
 				next();
 			},
@@ -144,9 +143,8 @@ export async function expectStreamNoCRLF(
 	_header: tar.Headers,
 	stream: Readable,
 ): Promise<void> {
-	const chai = await import('chai');
 	const buf = await streamToBuffer(stream);
-	await chai.expect(buf.includes('\r\n')).to.be.false;
+	expect(buf.includes('\r\n')).to.be.false;
 }
 
 /**
@@ -184,12 +182,13 @@ export async function testDockerBuildStream(o: {
 
 		o.dockerMock.expectPostBuild({
 			...o,
-			checkURI: async (uri: string) => {
+			checkURI: (uri: string) => {
 				const url = new URL(uri, 'http://test.net/');
 				const queryParams = Array.from(url.searchParams.entries());
 				expect(deepJsonParse(queryParams)).to.have.deep.members(
 					deepJsonParse(expectedQueryParams),
 				);
+				return Promise.resolve();
 			},
 			checkBuildRequestBody: (buildRequestBody: string) =>
 				inspectTarStream(buildRequestBody, expectedFiles, projectPath),
@@ -241,12 +240,13 @@ export async function testPushBuildStream(o: {
 
 	o.builderMock.expectPostBuild({
 		...o,
-		checkURI: async (uri: string) => {
+		checkURI: (uri: string) => {
 			const url = new URL(uri, 'http://test.net/');
 			const queryParams = Array.from(url.searchParams.entries());
 			expect(deepJsonParse(queryParams)).to.have.deep.members(
 				deepJsonParse(expectedQueryParams),
 			);
+			return Promise.resolve();
 		},
 		checkBuildRequestBody: (buildRequestBody) =>
 			inspectTarStream(buildRequestBody, o.expectedFiles, o.projectPath),

tests/helpers.ts

@@ -287,15 +287,14 @@ export function monochrome(text: string): string {
  */
 export function fillTemplate(
 	templateString: string,
-	templateVars: object,
+	templateVars: Record<string, unknown>,
 ): string {
-	const escaped = templateString.replace(/\\/g, '\\\\').replace(/`/g, '\\`');
-	const resolved = new Function(
-		...Object.keys(templateVars),
-		`return \`${escaped}\`;`,
-	).call(null, ...Object.values(templateVars));
-	const unescaped = resolved.replace(/\\`/g, '`').replace(/\\\\/g, '\\');
-	return unescaped;
+	return templateString.replace(/\$\{(\w+)\}/g, (_, key) => {
+		if (key in templateVars) {
+			return String(templateVars[key]);
+		}
+		throw new Error(`Missing template variable: ${key}`);
+	});
 }
 
 /**

tests/nock/balena-api-mock.ts

@@ -283,7 +283,7 @@ export class BalenaAPIMock extends NockMock {
 		this.optGet(/^\/v\d+\/service_environment_variable($|\?)/, opts).reply(
 			function (uri, _requestBody) {
 				const match = uri.match(/service_name%20eq%20%27(.+?)%27/);
-				const serviceName = (match && match[1]) || undefined;
+				const serviceName = match?.[1] || undefined;
 				let varArray: any[];
 				if (serviceName) {
 					const varObj = appServiceVarsByService[serviceName];
@@ -331,7 +331,7 @@ export class BalenaAPIMock extends NockMock {
 			opts,
 		).reply(function (uri, _requestBody) {
 			const match = uri.match(/service_name%20eq%20%27(.+?)%27/);
-			const serviceName = (match && match[1]) || undefined;
+			const serviceName = match?.[1] || undefined;
 			let varArray: any[];
 			if (serviceName) {
 				const varObj = deviceServiceVarsByService[serviceName];

tests/nock/nock-mock.ts

@@ -37,7 +37,7 @@ export class NockMock {
 
 	constructor(
 		public basePathPattern: string | RegExp,
-		public allowUnmocked: boolean = false,
+		public allowUnmocked = false,
 	) {
 		if (NockMock.instanceCount === 0) {
 			if (!nock.isActive()) {

tests/projects.ts

@@ -50,7 +50,7 @@ export async function exists(fPath: string) {
 	try {
 		await fs.stat(fPath);
 		return true;
-	} catch (e) {
+	} catch {
 		return false;
 	}
 }

tests/utils/image-manager/image-manager.spec.ts

@@ -1,5 +1,5 @@
 import * as stream from 'stream';
-import { AssertionError, expect } from 'chai';
+import { expect } from 'chai';
 import { stub } from 'sinon';
 import * as tmp from 'tmp';
 import { delay } from '../../utils';
@@ -62,7 +62,7 @@ describe('image-manager', function () {
 
 						return stream.on('end', function () {
 							expect(result).to.equal('Cache image');
-							return done();
+							done();
 						});
 					});
 				});
@@ -153,9 +153,7 @@ describe('image-manager', function () {
 								const contents = await fsAsync
 									.stat(this.image.name + '.inprogress')
 									.then(function () {
-										throw new AssertionError(
-											'Image cache should be deleted on failure',
-										);
+										throw new Error('Image cache should be deleted on failure');
 									})
 									.catch((err) => {
 										if (err.code !== 'ENOENT') {
@@ -174,7 +172,7 @@ describe('image-manager', function () {
 					});
 				});
 
-				describe('given a stream with the mime property', async function () {
+				describe('given a stream with the mime property', function () {
 					beforeEach(function () {
 						this.osDownloadStub = stub(balena.models.os, 'download');
 						const message = 'Lorem ipsum dolor sit amet';
@@ -422,7 +420,7 @@ describe('image-manager', function () {
 					.then(function (stream) {
 						let result = '';
 
-						stream.on('data', (chunk) => (result += chunk));
+						stream.on('data', (chunk: string) => (result += chunk));
 
 						stream.on('end', function () {
 							expect(result).to.equal('Lorem ipsum dolor sit amet');
@@ -554,7 +552,9 @@ describe('image-manager', function () {
 				mockFs({});
 			});
 
-			afterEach(() => mockFs.restore());
+			afterEach(() => {
+				mockFs.restore();
+			});
 
 			it('should keep the cache directory removed', async function () {
 				const exists = await fsExistsAsync(this.cacheDirectory);

tests/utils/validation.spec.ts

@@ -210,31 +210,31 @@ describe('parseAsInteger() function', () => {
 		);
 	});
 
-	it('should parse integers to number type', () => {
-		expect(v.parseAsInteger('100')).to.equal(100);
-		expect(v.parseAsInteger('100')).to.be.a('number');
-		expect(v.parseAsInteger('0')).to.equal(0);
-		expect(v.parseAsInteger('0')).to.be.a('number');
+	it('should parse integers to number type', async () => {
+		expect(await v.parseAsInteger('100')).to.equal(100);
+		expect(await v.parseAsInteger('100')).to.be.a('number');
+		expect(await v.parseAsInteger('0')).to.equal(0);
+		expect(await v.parseAsInteger('0')).to.be.a('number');
 	});
 });
 
 describe('tryAsInteger() function', () => {
-	it('should return string with non-numeric characters as string', () => {
-		expect(v.tryAsInteger('abc')).to.be.a('string');
-		expect(v.tryAsInteger('1a')).to.be.a('string');
-		expect(v.tryAsInteger('a1')).to.be.a('string');
-		expect(v.tryAsInteger('a')).to.be.a('string');
-		expect(v.tryAsInteger('1.0')).to.be.a('string');
+	it('should return string with non-numeric characters as string', async () => {
+		expect(await v.tryAsInteger('abc')).to.be.a('string');
+		expect(await v.tryAsInteger('1a')).to.be.a('string');
+		expect(await v.tryAsInteger('a1')).to.be.a('string');
+		expect(await v.tryAsInteger('a')).to.be.a('string');
+		expect(await v.tryAsInteger('1.0')).to.be.a('string');
 	});
 
-	it('should return numerical strings with leading zeros as string', () => {
-		expect(v.tryAsInteger('01')).to.be.a('string');
-		expect(v.tryAsInteger('001')).to.be.a('string');
+	it('should return numerical strings with leading zeros as string', async () => {
+		expect(await v.tryAsInteger('01')).to.be.a('string');
+		expect(await v.tryAsInteger('001')).to.be.a('string');
 	});
 
-	it('should return numerical strings without leading zeros as number', () => {
-		expect(v.tryAsInteger('100')).to.be.a('number');
-		expect(v.tryAsInteger('256')).to.be.a('number');
-		expect(v.tryAsInteger('0')).to.be.a('number');
+	it('should return numerical strings without leading zeros as number', async () => {
+		expect(await v.tryAsInteger('100')).to.be.a('number');
+		expect(await v.tryAsInteger('256')).to.be.a('number');
+		expect(await v.tryAsInteger('0')).to.be.a('number');
 	});
 });

tsconfig.dev.json

@@ -9,6 +9,7 @@
 		"./src/**/*",
 		"./patches/*",
 		"./tests/**/*",
-		"./typings/**/*"
+		"./typings/**/*",
+		".mocharc-standalone.js",
 	]
 }

typings/JSONStream/index.d.ts

@@ -32,7 +32,7 @@ declare module 'JSONStream' {
 		recurse: boolean;
 	}
 
-	export function parse(pattern: any | any[]): NodeJS.ReadWriteStream;
+	export function parse(pattern: any): NodeJS.ReadWriteStream;
 
 	type NewlineOnlyIndicator = false;
 

typings/balena-device-init/index.d.ts

@@ -16,7 +16,7 @@
  */
 
 declare module 'balena-device-init' {
-	import { DeviceTypeJson } from 'balena-sdk';
+	import type { DeviceTypeJson } from 'balena-sdk';
 
 	interface OperationState {
 		operation:
@@ -83,23 +83,23 @@ declare module 'balena-device-init' {
 
 	export function configure(
 		image: string,
-		manifest: BalenaSdk.DeviceTypeJson.DeviceType.DeviceType,
+		manifest: DeviceTypeJson.DeviceType,
 		config: object,
 		options?: object,
 	): Promise<InitializeEmitter>;
 
 	export function initialize(
 		image: string,
-		manifest: BalenaSdk.DeviceTypeJson.DeviceType.DeviceType,
+		manifest: DeviceTypeJson.DeviceType,
 		config: object,
 	): Promise<InitializeEmitter>;
 
 	export function getImageOsVersion(
 		image: string,
-		manifest: BalenaSdk.DeviceTypeJson.DeviceType.DeviceType,
+		manifest: DeviceTypeJson.DeviceType,
 	): Promise<string | null>;
 
 	export function getImageManifest(
 		image: string,
-	): Promise<BalenaSdk.DeviceTypeJson.DeviceType.DeviceType | null>;
+	): Promise<DeviceTypeJson.DeviceType | null>;
 }