Script to push (mirror) a large repo to GitHub

push-big-repo

#!/bin/bash -ex
#
# Push the current repository to GitHub, in small enough chunks that it
# won't exceed the pack-size limit

# Commit to start with, counting from the oldest.  If the process fails,
# you can change this variable to restart from where it failed.
START_COMMIT=1000

# Number of commits to push at a time, counting from the oldest.  If a
# push fails because the pack file is too big, try using a smaller number.
COMMIT_STEP=1000

git log --pretty=%H | ruby -e 'puts ARGF.each_line.to_a.reverse' > commits
COMMIT_COUNT=$(wc -l commits | cut -d' ' -f1)

for i in `seq $START_COMMIT $COMMIT_STEP $COMMIT_COUNT`; do
	echo ====== $i
	COMMIT=$(git show $(head -$i commits | tail -1) | head -1 | cut -d' ' -f2)
	git tag -d foo || true
	git tag foo $COMMIT
	git push -f origin foo
done

git tag -d foo
git push origin HEAD
git push --mirror

Thanks for the clarification!

I have just migrated a 10GB repo from gitlab to github. FIrst I had issues with 100MB size limit - fixed it with git lfs than encountered the issue push >2GB but with your script it worked out like a charm ;)

Thank you for this @piki ! I was able to use this to mirror a large repo with a long commit history.

FYI: I did notice what appears to be a small bug in the script - it appears that lines 8 and 12 are reversed w.r.t. their comments. (I saw this because I did have to tune the commit step size.)

Good catch, @nkitagawa-venn. Fixed it!