Abstract: In an embodiment, a computer-implemented method provides causing displaying in a first screen of a first GUI a first toolbar and a second toolbar. The first toolbar has options related to a branch of source code, including a first option to show a difference between a current version and a previous version of the source code, and the second toolbar has of options related to two branches of source code, including a second option to set up a pull request of merging changes from a source branch into a destination branch. The method further provides receiving a selection of the first option; and causing displaying in the first screen of the GUI a first panel and a second panel. The first panel has a current version of source code in a first branch and an indicator of any difference from a previous version, and the second panel has a current version of source code in a second branch and an indicator of any difference from a previous version.

Abstract: In an embodiment, a data processing method provides creating and storing one or more comment records, wherein each of the comment records associates a first identifier of a comment with a second identifier of a line of computer program source code to which the comment pertains, and a change set of a first version of the source code; receiving a request to display a second version of the source code, and in response to the request: determining a diff between the second version of the source code and the first version of the source code; for each hunk of the diff, automatically computing a drift value representing a number of lines of the source code by which a particular comment associated with the first version of the source code has changed with respect to the second version of the source code; updating a particular comment record of the particular comment by modifying the second identifier based upon the drift value; repeating the receiving, determining, computing and updating for all comments that are asso