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= Git bisect automation
:categories: git
It is good to have an standardized way to run builds and tests on the repository
of a project, so that you can find when a bug was introduced by using
`git bisect run`.
I've already been in the situation when a bug was introduced and I didn't know
how it even was occurring, and running Git bisect over hundreds of commits to
pinpoint the failing commit was very empowering:
....
$ GOOD_COMMIT_SHA=e1fd0a817d192c5a5df72dd7422e36558fa78e46
$ git bisect start HEAD $GOOD_COMMIT_SHA
$ git bisect run sn -c './build.sh && ./run-failing-case.sh'
....
Git will than do a binary search between the commits, and run the commands you
provide it with to find the failing commit.
Instead of being afraid of doing a bisect, you should instead leverage it, and
make Git help you dig through the history of the repository to find the bad
code.
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