New action subcommand

[mosteo]

No need to review yet as tests are still missing.

This PR adds a new subcommand, alr action, to allow listing and manual triggering of actions and so help with their development/debugging.

alr action simply lists any actions defined.

alr action post-fetch and similar trigger the associated actions.

Adding the --recursive flag will list/trigger in dependencies too.

I ditched the idea discussed elsewhere of having a custom action type, since it would likely consist in running an script, and alr exec already covers that use case.

[Fabien-Chouteau]

BTW, I think we should reconsider the post-fetch action. See https://go.dev/blog/supply-chain

[mosteo]

BTW, I think we should reconsider the post-fetch action. See https://go.dev/blog/supply-chain

Lots of interesting info in that link. But how will we deal with anything requiring a makefile or extra tool? We could have some kind of safe mode where actions cause an error instead of being run.

I find most interesting the bit about not automatically updating and making transitive dependencies explicit.

[Fabien-Chouteau]

Lots of interesting info in that link. But how will we deal with anything requiring a makefile or extra tool? We could have some kind of safe mode where actions cause an error instead of being run.

Or a user query that shows the action that will be executed.