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run_cli.js
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run_cli.js
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/*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import { inspect } from 'util';
import chalk from 'chalk';
import getopts from 'getopts';
export class CliError extends Error {
constructor(message, exitCode = 1) {
super(message);
this.exitCode = exitCode;
Error.captureStackTrace(this, CliError);
}
}
export async function runCli(getHelpText, run) {
try {
const userOptions = getopts(process.argv.slice(2)) || {};
if (userOptions.help) {
console.log(getHelpText());
return;
}
await run(userOptions);
} catch (error) {
if (!(error instanceof Error)) {
error = new Error(`${inspect(error)} thrown!`);
}
console.log();
console.log(chalk.red(error.message));
// CliError is a special error class that indicates that the error is produced as a part
// of using the CLI, and does not need a stack trace to make sense, so we skip the stack
// trace logging if the error thrown is an instance of this class
if (!(error instanceof CliError)) {
// first line in the stack trace is the message, skip it as we log it directly and color it red
if (error.stack) {
console.log(
error.stack
.split('\n')
.slice(1)
.join('\n')
);
} else {
console.log(' (no stack trace)');
}
}
console.log();
process.exit(error.exitCode || 1);
}
}