git test case #1

# create empty repo 'v8-test' at your account @github

# initial setup with totally empty commit
git init
git remote add origin git@github.com:${username}/v8-test.git
git checkout -b master
git commit --allow-empty --allow-empty-message

# early detach
git checkout -b upstream
git commit --allow-empty -m 'start upstream branch'

# back to master
git checkout master
git commit --allow-empty -m 'start Debian branch'

# setup upstream branch
git checkout upstream
git remote add source git@github.com:v8/v8.git
git remote update --prune
git remote set-head source 3.22
git merge --squash --no-commit source
git commit -m 'Imported upstream 3.22.24.20'

# cleanup our upstream branch
ls -lhd    -- test/mjsunit/tools/*.log tools/v8.xcodeproj
git rm -rf -- test/mjsunit/tools/*.log tools/v8.xcodeproj
ls -lhd    -- test/mjsunit/tools/*.log tools/v8.xcodeproj
git commit -m 'Cleanup upstream'

# finalize
git push -u origin master
git push -u origin upstream