mirror of
https://github.com/balena-io/balena-cli.git
synced 2024-12-19 05:37:51 +00:00
104 lines
3.3 KiB
TypeScript
104 lines
3.3 KiB
TypeScript
/**
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* @license
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* Copyright 2019-2020 Balena Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* THIS MODULE SHOULD NOT IMPORT / REQUIRE ANYTHING AT THE GLOBAL LEVEL.
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* It is meant to contain elementary helper functions or classes that
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* can be used very early on during CLI startup, before anything else
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* like Sentry error reporting, preparser, oclif parser and the like.
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*/
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export class CliSettings {
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public readonly settings: any;
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constructor() {
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this.settings = require('balena-settings-client') as typeof import('balena-settings-client');
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}
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public get<T>(name: string): T {
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return this.settings.get(name);
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}
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/**
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* Like settings.get(), but return `undefined` instead of throwing an
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* error if the setting is not found / not defined.
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*/
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public getCatch<T>(name: string): T | undefined {
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try {
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return this.settings.get(name);
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} catch (err) {
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if (!/Setting not found/i.test(err.message)) {
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throw err;
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}
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}
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}
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}
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export function parseBoolEnvVar(varName: string): boolean {
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return !['0', 'no', 'false', '', undefined].includes(
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process.env[varName]?.toLowerCase(),
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);
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}
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export function normalizeEnvVar(varName: string) {
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process.env[varName] = parseBoolEnvVar(varName) ? '1' : '';
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}
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const bootstrapVars = ['DEBUG', 'BALENARC_NO_SENTRY'];
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export function normalizeEnvVars(varNames: string[] = bootstrapVars) {
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for (const varName of varNames) {
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normalizeEnvVar(varName);
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}
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}
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/**
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* Implements the 'pkgExec' command, used as a way to provide a Node.js
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* interpreter for child_process.spawn()-like operations when the CLI is
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* executing as a standalone zip package (built-in Node interpreter) and
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* the system may not have a separate Node.js installation. A present use
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* case is a patched version of the 'windosu' package that requires a
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* Node.js interpreter to spawn a privileged child process.
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*
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* @param modFunc Path to a JS module that will be executed via require().
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* The modFunc argument may optionally contain a function name separated
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* by '::', for example '::main' in:
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* 'C:\\snapshot\\balena-cli\\node_modules\\windosu\\lib\\pipe.js::main'
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* in which case that function is executed in the require'd module.
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* @param args Optional arguments to passed through process.argv and as
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* arguments to the function specified via modFunc.
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*/
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export async function pkgExec(modFunc: string, args: string[]) {
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const [modPath, funcName] = modFunc.split('::');
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let replacedModPath = modPath;
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const match = modPath
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.replace(/\\/g, '/')
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.match(/\/snapshot\/balena-cli\/(.+)/);
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if (match) {
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replacedModPath = `../${match[1]}`;
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}
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process.argv = [process.argv[0], process.argv[1], ...args];
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try {
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const mod: any = await import(replacedModPath);
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if (funcName) {
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await mod[funcName](...args);
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}
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} catch (err) {
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console.error(`Error executing pkgExec "${modFunc}" [${args.join()}]`);
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console.error(err);
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}
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}
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