> From: cemico <webmas...@cemico.de>
> How do i remove let's say a "concept_art" folder from all commits (i have
> about 50 commits by now) and from the pack file?
> I tried many things now. e.g:
> - http://dound.com/2009/04/git-forever-remove-files-or-folders-from-history/
> - http://rtyley.github.io/bfg-repo-cleaner/
> - filter-branch with "rm"
> - git gc with prune=now and aggresive
> and the thing i thought which must really work:
First, be aware that what you want to do is intrinsically difficult.
Git is oriented toward allowing you to manipulate commits, etc. But
removing objects from storage is not a task that it is designed to
make easy. I have had a little experience and I think I can provide
some useful guidance.
You already know how to recreate all your commits with certain
directories or files removed:
git filter-branch --index-filter $SCRIPT HEAD
You also know how to remove a stored object if it is no longer
git gc --aggressive --prune=now
What is difficult is ensuring that you have removed all references to
the object. In general, this involves removing records of past states
of the HEAD, and there are a lot of those records. You have to remove
the record of the previous version of the branch you are manipulating.
(You have to do this before git-filter-branch, so that
git-filter-branch actually runs, and after it, to remove the value
that git-filter-branch put there.) Your command looks to me like it
rm -rf .git/refs/original/
Where I think you have a problem is with the reflog. In the
repository on which I use git-filter-branch, I have configured
git config core.logallrefupdates false
To ensure that no reflog entries are generated. In your case, you use
git reflog expire --all
But as far as I can tell from the manual page, that means "examine all
reflogs to find expired entries". You probably need to add
"--expire=now" so that all entries are considered expired.
You can probably examine .git/logs to see if there are any reflog
entries, and what their values are. My suspicion is that one value
points to a commit that points to the files you want to excise.
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