spawn: async()

in build/src/utils/async.js [25:71]

• 46 lines of code
• 10 McCabe index (conditional complexity)

    spawn: async (command, args, opts) => {
        console.log(`(*) Spawn: ${command}${args.reduce((prev, current) => `${prev} ${current}`, '')}`);

        opts = opts || { stdio: 'inherit', shell: true };
        let echo = false;
        if (opts.stdio === 'inherit') {
            opts.stdio = 'pipe';
            echo = true;
        }
        return new Promise((resolve, reject) => {
            let result = '';
            const proc = spawnCb(command, args, opts);
            proc.on('close', (code, signal) => {
                if (code !== 0) {
                    if(!echo) {
                        console.error(result);
                    }
                    const err = new Error(`Non-zero exit code: ${code} ${signal || ''}`);
                    err.result = result;
                    err.code = code;
                    err.signal = signal;
                    reject(err);
                    return;
                }
                resolve(result);
            });
            if (proc.stdout) {
                proc.stdout.on('data', (chunk) => {
                    const stringChunk = chunk.toString();
                    result += stringChunk;
                    if (echo) {
                        process.stdout.write(stringChunk);
                    }
                });
            }
            if (proc.stderr) {
                proc.stderr.on('data', (chunk) => {
                    const stringChunk = chunk.toString();
                    result += stringChunk;
                    if (echo) {
                        process.stderr.write(stringChunk);
                    }
                });
            }
            proc.on('error', reject);
        });
    },