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I need to search in the git history of a couple of packages to get back to a working state for a demo. I am searching by checking out commits manually until I found the commits of all effected packages that work together.

By checking out commits manually, I will get into the detached HEAD state:

$ git checkout 995e018 -> You are in 'detached HEAD' state. [...]

To save the current state of all packages, a snapshot is created:

$ autoproj snapshot demo_working

Now the demo_working/overrides.yml will pin the commit where the HEAD is pointing to (e.g. 5e2e3a259) instead of the commit that I chose manually for the package (995e018).

Is this the desired behaviour? In my opinion a snapshot should store the current state of all my git repositories meaning that I can also select commits manually.

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  • $\begingroup$ For future reference, you can binary search the last commit where a condition was satisfied (e.g. before a bug was introduced, or while everything still worked) using git bisect $\endgroup$
    – Shahbaz
    Jun 25, 2014 at 12:12

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Working with git HEADs is just a bad idea, so yes, this behaviour is expected.

What you want to do is reset your current branch to the desired commit, i.e.

git reset --hard 995e018

which will be picked up by autoproj

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