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import { ChildProcess, fork } from "child_process";

import * as path from "path";

jest.setTimeout(30000);

const cliPath = path.join(__dirname, "../../src/tstl.ts");

const defaultArgs = ["--skipLibCheck", "--types", "node"];

export function forkCli(args: string[]): ChildProcess {

return fork(cliPath, [...defaultArgs, ...args], {

stdio: "pipe",

execArgv: ["--require", "ts-node/register/transpile-only"],

});

}

export interface CliResult {

exitCode: number;

output: string;

}

export async function runCli(args: string[]): Promise<CliResult> {

const child = forkCli(args);

let output = "";

child.stdout!.on("data", (data: Buffer) => (output += data.toString()));

child.stderr!.on("data", (data: Buffer) => (output += data.toString()));

return new Promise(resolve => {

child.on("close", exitCode => resolve({ exitCode: exitCode ?? 1, output }));

});

}