6-git-bisect.md

git bisect

Reference docs

This command uses a binary search algorithm to find which commit in your project’s history introduced a bug (or a performance improvement).

The Set-Up

Let's make a file called password.txt and hide it in our branch.

The long version

git bisect start
git bisect bad <bad-revision>
git bisect good <good-revision>

At each pause, test to determine whether the "bug" exists. If the bug exists at the revision, type git bisect bad. If everything is ok, type git bisect good.

To end the bisect, type:

git bisect reset

The quick(er) version

git bisect start <bad-revision> <good-revision>
git bisect run ls password.txt