>Facebook and Google know that keeping all your source code in one single repository is good I'm not sure about Facebook, but Google continually wastes enginee

>Facebook and Google know that keeping all your source code in one single repository is good I'm not sure about Facebook, but Google continually wastes engineers on policing test failures because anyone at any time could have committed a change that breaks your tests for hours (along with all their other dependencies). The cadence of integration should match that of deployment; I don't want to test against code that won't be in production and I certainly don't want to be slowed down over shitty code that obviously can't go out.