2.4.x vs trunk : history of commits, the visual way

[Christophe JAILLET <ch...@wanadoo.fr>]

Hi,

just for fun, here is a tentative representation of the history of 
commits which shows the differences between the 2.4.x branch and trunk.

Basically, it is build as follow:
    - svn diff
    - hand made script which annotates the diff file with the results 
from svn blame
    - hand made script which build a .dot file out of this maze.

To generate the dot file, I take each commit listed in each hunk of the 
diff file, sort them, and generate dependency graph.
"dot -Tsvg" finalizes the job and links everything that need to be 
linked in order to see the full picture.

However, the picture is not 100% accurate. As I use "svn annotate", I 
only get references to commits that add or modify something, not the 
ones that remove something.
Depending on the output of "svn diff", empty lines are also not 
necessarily taken from the correct commit.
As it works hunk but hunk, big hunks are likely to add some extra and 
incorrect dependencies.

However, this gives a nice and huge dependency graph that gives a idea 
of the evolution of the code.

Apart from the fun, it could also help in case of complex backport to 
see what and from where things are coming.


CJ