I am a bachelor student with the SCG group and currently writing my thesis entitled "The Genesis of Pharo: The Complete History of Pharo with Git". The primary goal of the thesis is to provide access to all the source code versions of Squeak and Pharo from a single source. Currently it is rather difficult to access all the versions of a specific code segement. We accomplish this goal in two steps:
If you are interested in the topic you might want to take a look at the links to the right. Feel free to contact me or ask on the Pharo mailing list.