sharing remote caching bootsnap cache dir across machines

[TSMMark]

E.g. with something like turborepo, for improved cache-hit across dev machines and CI.

Would remote caching bootsnap cache be feasible, or is the cache machine dependent?

[byroot]

The bootsnap cache is shareable across machines, but with some caveat:

• The source code must have the same absolute path on all machines (this is a limitation of the API provided by Ruby: https://bugs.ruby-lang.org/issues/17593, may be fixed in the future).
• The cache key include the source code mtime, so depending on how you deploy your code and share your cache, it may or may not work.

[casperisfine]

Closing in favor of #336