> I wonder if for command runner unnecessarily re-running dependencies is really a big deal.
I've used in in the past with python/django roughly like so (untested from memory, there may be a "last modified" bug in here that still makes something run unnecessarily):
Setting up these prerequisites takes a while and doing every time you start the dev server would be a pain, but not doing it and forgetting when requirements were updated is also a pain. This would handle both.
Specifies order without a hard more-recent-than dependency on everything after the |. So if the timestamp on "environ" is updated, that won't cause the "environ/lib" recipe to run, but if they both have to run then it ensures "environ" happens before "environ/lib".
It might not be necessary for this example, but I've found being more liberal with this feature and manually using "touch" has been more reliable in stopping unnecessary re-runs when the recipe target and dependency are directories instead of just files.
I've used in in the past with python/django roughly like so (untested from memory, there may be a "last modified" bug in here that still makes something run unnecessarily):
Setting up these prerequisites takes a while and doing every time you start the dev server would be a pain, but not doing it and forgetting when requirements were updated is also a pain. This would handle both.