website/content/blog/git-bisect-broken-builds.md

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2022-05-03 01:31:11 -04:00
---
title: "Which commit broke the build? Using Git Bisect"
date: 2022-05-03T01:15:55-04:00
draft: false
2022-11-12 11:22:54 -05:00
tags: ["Git"]
2022-05-03 01:31:11 -04:00
math: false
---
Lets imagine a scenario where in the latest merge a test
starts failing. Lets say these tests are saved
in `test.sh`. Instead of having to test each individual
commit in the merge, to see where the test fails, luckily
`git bisect` narrows it down in a more efficient way!
To use:
```bash
git bisect start [good] [bad]
git bisect run test.sh
```
Where `[good]` and `[bad]` are replaced with their respective
commit hashes.
Under the hood, Git will run a binary search between the good
and bad nodes in the commit tree.
As a reminder, don't forget to make `test.sh` an executable.
Starting in Git 2.36 it will provide a warning, but earlier
versions will perform the search anyways even with it all
failing.
Read more: https://git-scm.com/docs/git-bisect