Rewrite the tails-live.git history

Without:

• the Debian packages: config/chroot_local-packages/*.deb config/chroot_local-packages/*.gz config/chroot_local-packages/*.bz2 config/chroot_local-packages/*.dsc
• the forum: wiki/src/forum*
• promotional material that will be moved somewhere else (#8827 (closed)): wiki/src/promote/*
• some large files from the logo contest: wiki/src/blueprint/logo/FINISHED_WORK.7z wiki/src/blueprint/logo/tails_hiding_cat.zip wiki/src/blueprint/logo/tails_walking_cat.zip
• TrueCrypt tarballs: config/chroot_local-includes/usr/share/amnesia/truecrypt*.gz

Once this is done, we can revert commit 4f5588 in the tails Puppet module (filtering out spurious jenkins-{build,fetch}* tags.

First try, with only one branch:

git filter-branch -d /var/tmp/git-rewrite --tree-filter 'rm -rf config/chroot_local-packages/*.deb config/chroot_local-packages/*.gz config/chroot_local-packages/*.bz2 config/chroot_local-packages/*.dsc wiki/src/forum*' feature/jessie
# git tag | xargs git tag -d # why?!
git remote  rm origin                                   
git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d
git reflog expire --expire=now --all                                                
git gc --aggressive --prune=now                                                     

=> .git goes from 316MB to 91MB. With all tags and current branches, it’ll probably be a tiny bit more.

To preserve tags, one needs to also pass --tag-name-filter cat to git filter-branch.

Other options:

• git filter-branch --index-filter is supposedly much faster than --tree-filter
• using bfg: java -jar /path/to/bfg.jar
  --delete-folders '{forum,deb-src}'
  -D '{.deb,.diff.gz,.debian.tar.,.orig.tar.,forum.mdwn}'
  tails-test.git

Blueprint: https://tails.boum.org/blueprint/rewrite_Git_history/

Subtasks

• #8618 (closed)
• #8619 (closed)
• #8620 (closed)
• #8624 (closed)
• #8633 (closed)
• #8630 (closed)
• #8632 (closed)
• #8631 (closed)
• #8629 (closed)
• #8628 (closed)
• #8627 (closed)
• #8813 (closed)
• #8939 (closed)
• #8946 (closed)

Original created by @intrigeri on 6277 (Redmine)