Rough steps:
```
mv cmd/restic/global* cmd/restic/secondary_repo* internal/global/
sed -i "s/package main/package global/" internal/global/*.go
Rename "GlobalOptions" to "Options" in internal/global/
Replace everywhere " GlobalOptions" -> " global.Options"
Replace everywhere "\*GlobalOptions" -> " *global.Options"
Make SecondaryRepoOptions public
Make create public
Make version public
```
The tests are now split into individual files for each command. The
separation isn't perfect as many tests make use of multiple commands. In
particular `init`, `backup`, `check` and `list` are used by a larger
number of test cases.
Most tests now reside in files name cmd_<name>_integration_test.go. This
provides a certain indication which commands have significant test
coverage.
