I've been diving a little bit into the internals of Fossil to learn about it, and I understand quite a bit now how everything works and fits together. Although there's still something pretty impressive about Fossil, that I can't understand well, which is the timeline graph page.

I really like how Fossil displays the timeline, and it's probably one of the best representations for working with a DAG of check-ins/commits I've seen in a while.

I've been trying to understand the particular algorithm Fossil uses, but the timeline.c source file is quite complicated, and I can't wrap my head around it yet. I was trying to see if there's any docs, or forums posts about it, but I couldn't find any.

I wonder if there's anything that is written about how Fossil draws the timeline graph? Maybe it's using some well-known algorithm, that I might lookup elsewhere?

To clarify, I'm only trying to understand how graph of check-ins work, with forks, and merges. I know there's more complexity about how other Fossil artifacts are displayed in the timeline, but I'm not currently looking into that.

Thanks Richard! I've found the graph.c and graph.js files right after I wrote this post, and realized that it was much more relevant than the code in timeline.c for what I was looking for. I will take a look at those files to learn more.