Can you undo a past commit, that has long been merged into your git repository, via a git command? Or do you have to manually undo all the changes made in that commit?
To undo changes associated with a specific commit, developers should use the git revert command. To undo every change that has happened since a given commit occurred, use git reset.
You can always just revert the changes from a single commit by doing:
git revert <commit-id>
note that this creates a new commit, undoing just those changes
E.g. git log --oneline
d806fc9 two 18cdfa2 bye 62c332e hello c7811ee initial
Say I want to revert changes in commit 18cdfa2
:
git revert 18cdfa2
We now have: git log -1 -p
commit fb9d6627a71636503fc9a1eb4f725937c783ecee Author: Seth <sehe@mint12.(none)> Date: Wed Oct 3 10:32:46 2012 +0200 Revert "bye" This reverts commit 18cdfa27c964b66b624be1030250757b745d6866. diff --git a/a b/a index 0907563..3b18e51 100644 --- a/a +++ b/a @@ -1 +1 @@ -bye world +hello world
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