Category: All

All posts across the whole website belong to this category. They might also belong to some other categories as well, but this one holds all of them. Hence the descriptive name – All.

Debugging with git bisect

Via Sebastian Bergmann’s blog I’ve learned about git bisect and how it can used for debugging.  Sebastian demonstrates the functionality together with PHPUnit.  I am a git newbie, so that was quite interesting for me.

git bisect can be used to find the change that introduced a bug. It does so by performing a binary search on the list of commits between a known good and a known bad state of the repository. A tool such as PHPUnit can be invoked at each step of the binary search to check whether or not the current state is broken.

Here is a shortcut on how to actually use it:

$ git bisect start
$ git bisect good someVersion
$ git bisect bad someOtherVersion
$ git bisect run someCommand -with SomeArgument

There are, of course, more resources online covering the feature.  I found this section of the Git Community Book helpful.  Hopefully, I’ll remember about it when I actually need it.

Day in brief