Running tests could be automatic during development

[czj]

Like Guard with Ruby, we could use Sentry with Crystal to run specs every time one changes.

https://github.com/samueleaton/sentry

We could have a Makefile that allows us to build the binary :

$ make build

Or release :

$ make release

Or run tests :

$ make test

Or watch folders and run tests

$ make sentry

[czj]

Like we use Makefile, a language/framework agnostic tool to run task, we probably could/should use a language-agnostic tool to run processes on changes.

The best candidate, I think, is entr :
https://github.com/clibs/entr

With a few lines in the Makefile we could have the usual / useful commands : watch src/*.cr to run tests on file change, watch src/*.cr and shards.lockto build and restart dev server, etc.

I'm maybe not good enough with bash to tackle the problem !