Revert changes to a file in a commit

The cleanest way I've seen of doing this is described here

git show some_commit_sha1 -- some_file.c | git apply -R

Similar to VonC's response but using git show and git apply.

Assuming it is ok to change the commit history, here's a workflow to revert changes in a single file in an earlier commit:

For example, you want to revert changes in 1 file (badfile.txt) in commit aaa222:

aaa333 Good commit
aaa222 Problem commit containing badfile.txt
aaa111 Base commit

Rebase on the base commit, amend the problem commit, & continue.

1) Start interactive rebase:

git rebase -i aaa111

2) Mark the problem commit for edit in the editor by changing pick to e (for edit):

e aaa222
pick aaa333

3) Revert changes to the bad file:

git show -- badfile.txt | git apply -R

4) Add the changes & amend the commit:

git add badfile.txt
git commit --amend

5) Finish the rebase:

git rebase --continue

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