Winston: How to rewrite log file on each program run?

[vsDizzy]

winston.add(winston.transports.File, { filename: 'log.txt' });

How to specify a rewrite file option, not append?

[ChrisAlderson]

Easiest is to remove the log file before you initiate your logger on each run. You can do this with the fs.unlink or fs.unlinkSync methods.

[indexzero]

The File transports accepts flags in an options param. For [email protected]:

winston.add(new winston.transports.File, {
  filename: 'your-file.log',
  options: { flags: 'w' }
});

See fs.open docs for what flags are available in Node.js.