a simple script for splitting the git history of a file
As source files grow larger, it can be desirable to split them into several more manageable files that correspond to reasonable logical units. Within a git repository, each new file should ideally retain the history of the file it was copied from.
For instance, if a file foo.src is to be split into foo_bar.src and foo_baz.src, we can use git-split to achieve this by performing the following steps:
$ sh git-split.sh foo.src foo_bar.src
$ git mv foo.src foo_baz.src
After these two steps, both files will have the same history as foo.src, and we can start deleting the content we don't need from them.