On May 5, 2008, at 5:59 PM, Joshua Root wrote:

The full enhancement requested by the ticket will (AFAICT) be rather difficult to implement at present. I have however attached a patch which improves things a bit. It makes 3 things better:

1. You can use depends_build for software that needs to be used in the extract or patch phases. This helps e.g. python23 which needs gnutar for extract. 2. You can use depends_build for software that is needed for the configure phase but not at runtime (e.g. pkgconfig). Currently depends_build is not checked until after the configure phase. 3. Dependencies weren't being checked when running some packaging targets. Now they are.

This raises an important question:

Is there any value in creating depends_foo procs for each reasonable value of foo, even if they are just aliases for depends_build in the short/medium/forever term?

Pros:
There is some documentary value to being able to say depends_extract <blah> or depends_configure <feh> even if they just fold to depends_build since it's clearer from the declaration just why the dependency is needed.

At some point, there might be real value to distinguishing between the types of dependencies. Say you were going on a business trip and looked forward to having plenty of spare CPU/disk cycles to build stuff on your laptop but not such great internet connectivity. You might do "port fetch bar" and expect it to only pre-populate your distfile cache, plus any tools the dependencies for bar might need just for fetching, but not actually build anything.

Might be less confusing than trying to explain that there are really only two umbrella dependencies types even though there are lots of different possible targets.

Cons:
        Adds complexity, namespace bloat.

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