Merge Two Git Repositories Into One

gistfile1.sh

# via http://jasonkarns.com/blog/merge-two-git-repositories-into-one/
# create new project as the parent
$ mkdir new_parent_project
$ cd new_parent_project
$ git init
$ touch .gitignore
$ git ci -am "initial commit"

# merge project A into subdirectory A
$ git remote add -f projA /path/to/projA
$ git merge -s ours --no-commit projA/master
$ git read-tree --prefix=subdirA/ -u projA/master
$ git ci -m "merging projA into subdirA"

# merge project B into subdirectory B
$ git remote add -f projB /path/to/projB
$ git merge -s ours --no-commit projB/master
$ git read-tree --prefix=subdirB/ -u projB/master
$ git ci -m "merging projB into subdirB"