Merge multiple repositories into one big monorepository. Migrates every branch in every subrepo to the eponymous branch in the monorepo, with all files (including in the history) rewritten to live under a subdirectory.

To use a separate temporary directory while migrating, set the GIT_TMPDIR envvar.

To access the individual functions instead of executing main, source this script from bash instead of executing it.

Invoke the script and pipe a list of repositories to stdin. It will create a new repository, in a directory called core:

./tomono.sh <<EOF
https://github.com/foo/bar.git bar
/home/me/myrepo myrepo
EOF

The contents of each repository will be moved to a subdirectory. A new branch will be created for each branch in each of those repositories, and branches of equal name will be merged.

E.g., if both repositories had a branch called master, your new repository (core) would have one branch called master with two directories in root: bar/ and myrepo/.

If you already have a repository called core and wish to import more into it, pass the --continue flag. Make sure you don't have any outstanding changes!