Add a "monthly" option for frequency?

[ravi]

Most logs do not grow fast enough, by my estimate (wrong?), to be rotated "daily". A "monthly" option would be nice to have. I could try to use "Xm" and calculate (X as 30_24_60) but that assumes all months have 30 days.

I can submit a PR if there is interest.

[hxroger]

Ravi thanks for the feedback. We are looking at refactoring the module. We will include the monthly option for the defined rotation.

[rogerc]

Hi Ravi,

You can use monthly by using a date format that will only change once a month (at the start of each month).

// Rotate when the date format as calculated by momentjs is different (e.g monthly)
var rotatingLogStream = require('file-stream-rotator').getStream({filename:"/tmp/test-%DATE%.log", frequency:"custom", verbose: false, date_format: "YYYY-MM"});