I'm asking this question because I'm studying the Pro Git book and there is a chapter, Rewriting History, that explains how to change the last commit $ git commit --amend, change multiple commit messages $ git rebase -i HEAD~3, delete a particular file or folder in all the commits with $ git filter-branch --tree-filter.
Here my question: the book doesn't mention the possibility of doing this work by multiple checkouts along ALL the commit's history. So I move my HEAD, commit by commit, and I change this particular commit with $ git commit --amend one by one.
I know it's really (REALLY!) expensive in terms of time spent, but is it really possibile (i.e. it works)?
And if yes, in which cases this could be useful?
For all commits, you can use newren/git-filter-repo, which can rewrite anything you need (author, commit message, files or file contents, ...)
For example, regarding commit message, using message-callback:
The message callback is quite similar to the previous three callbacks, though it operates on a bytestring that is likely more than one line:
git-filter-repo --message-callback ' if b"Signed-off-by:" not in message: message += b"\nSigned-off-by: Me My <self@and.eye>" return re.sub(b"[Ee]-?[Mm][Aa][Ii][Ll]", b"email", message)'