Migrating packages to monorepo

The process of integrating barnard packages to the monorepo is simple

For a hypothetical package barnard59-foobar

1. Install filter-repo
2. Fresh-clone the original repository (assuming /path/to/barnard59-foobar)
3. Use it to rewrite history by moving all sources to package/foobar and renaming tags

   git filter-repo --to-subdirectory-filter packages/foobar --tag-rename v:barnard59-foobar@ --force
   

4. Remove unwanted files. At least .github, yarn.lock/package-lock.json
5. Adjust package.json. Typically all it takes is to remove some dev dependencies and shared config (lint-staged, etc), and correct metadata
6. Commit
7. Merge into a branch of barnard59

   git checkout -b migrate-foobar
   git remote add foobar /path/to/barnard59-foobar
   git fetch foobar
   git merge foobar/master --allow-unrelated-histories
   npm i
   

8. npm run lint -- --fix
9. Ensure npm run test succeeds
10. Add package to test matrix
11. Add package to README
12. git push --follow-tags
13. Create PR
14. Transfer open issues
15. Change the README to link to monorepo
16. Archive original repo