Microsoft is said to have agreed to acquire coding site GitHub, with an official announcement to be expected on Monday.

San Francisco-based startup GitHub, which was valued at $2 billion in 2015, is used by coders, in order to store their corporate code and to collaborate. It's also a social network of sorts for developers.

According to Bloomberg and BusinessInsider, a deal will be announced on Monday.

Microsoft has been criticizing the open-source software since the beginning of the company, since it could be a threat for Microsoft's main business. But a lot has changed since then, and under CEO Satya Nadella, Microsoft is supporting many flavors of Linux and has used open-source models on some significant cloud and developer products itself.

Microsoft is now one of the biggest contributors to GitHub, and as Nadella moves the company away from complete dependence on the Windows operating system to more in-house development on Linux, the company needs new ways to connect with the broader developer community.