Before, jbuilder used to stop its execution after an error was
encountered. Now it continues until all branches have been explored.
To implement this feature, Future was rewritten as a Fiber module with
a simpler semantic.
This patch contains various other refactorings.
* Change jbuilder to load rules lazily
Rules are now loaded on a per directory basis as needed. This speed up
the start up time on large workspaces.
Does various refactoring as well.
* Simplify the handling of META files
We no longer generate a META.foo.from-jbuilder file. Nobody is using
this feature and it's making the new code more complicated.
Option to force running tests
The mechanism allows for forcing any alias, but only forcing tests is exposed to the user. Aliases are forced by deleting all the alias files that belong to a particular alias. The option for forcing tests is called --force.
This is cleaner and allow dependencies on files that do not
appear in static deps or targets.
With this patch, one can now build all JS packages at once.