Cannot separately process stderr

execSync redirects stderr to stdout:

sh = require('execSync');
var stdout = sh.exec('echo my_error >&2').stdout;
console.log('stdout: ' + stdout); // stdout: my_error

However, it would be preferable (IMO) if it worked like this instead:

var sh = require('execSync');
var stdout = sh.exec('echo my_output').stdout;
var stderr = sh.exec('echo my_error >&2').stderr;
console.log('stdout: ' + stdout + ' ; stderr: ' + stderr); // stdout: my_output ; stderr: my_error

[jonnyreeves]

You can work around this by manually redirect stdErr and stdOut when invoking run, ie:

var stdOutTmpFile = temp.openSync("cmd-stdout").path;
var stdErrTmpFile = temp.openSync("cmd-stderr").path;

var statusCode = execSync.run(cmd + " 1> " + stdOutTmpFile + " 2> " + stdErrTmpFile);

console.log(fs.readFileSync(stdOutTmpFile.toString()));
console.log(fs.readFileSync(stdErrTmpFile.toString()));