Page History

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cp -a 3.refs-cleaned 4.recent-history
cd 4.recent-history

Remove tags and branches prior to 3.3

git tag -d `git tag|grep -v 3.[34]`
git branch -D maintenance-2.2 fcrepo-579 fcrepo-586

Find the id of the 3.3 tagged commit and parent:

git log --since=2009-12-18 --until=2009-12-19export lastid=`git show v3.3|grep ^commit|sed 's/...... \(.*\)$/\1/'`
export parentid=`git show $lastid^|grep ^commit|sed 's/...... \(.*\)$/\1/'`

Filter out everything prior:

export lastid=86b96dec0108af8bc160b84f24276962e0c4e2d5
export parentid=100891ba5fd0f1d3869236047867462355e9f1b1

git filter-branch --parent-filter "sed -e 's/-p $parentid//'" \
--tag-name-filter cat -- --all ^$parentid

git for-each-ref --format='%(refname)' refs/original \
| while read ref; do git update-ref -d "$ref"; done

Re-sign the tags:

git retag v3.3 v3.3
git retag v3.3.1 v3.3.1
git retag v3.4 v3.4
git retag v3.4-RC1 v3.4-RC1
git retag v3.4.1 v3.4.1

Reclaim unused space:

git reflog expire --expire=0 --all
git repack -ad
git prune

Find the new id of the 3.3 tagged commit (now the root commit of this repository):

export lastid=`git show v3.3|grep ^commit|sed 's/...... \(.*\)$/\1/'`

5. Separate Ancient History (fcrepo-before33)

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git tag -d `git tag|grep 3.[34]`

git branch -D `git branch | grep -v master \
|grep -v maintenance-3.42.2 | grep -v fcrepo-579 \
|grep -v fcrepo-586`

git reset --hard (parent of lastid)$parentid
git gc --prune=now

6. Graft Test

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cp ../5.ancient-history/.git/objects/pack/* \
.git/objects/pack

Create the graft:

echo $lastid $parentid > .git/info/grafts

Copy historic tags and branches with the following content (where $lastid and $parentid are the actual values set previously):

$lastid $parentidcat ../5.ancient-history/.git/packed-refs >> .git/packed-refs

Test it (all history, including old tags and branches, should be visible):

gitk --all

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