Unable to resolve dependencies for split packages

[pbrisbin]

(See #39 for example case)

Scenario

• Given some package p which is a split package for building (at least) q
• Given p (and therefore q) has an AUR dependency x
• Given the user invokes aurget -Sy --deps q

What happens

• Aurget attempts to download the PKGBUILD for q to resolve dependencies
• This PKGBUILD does not exist (only the PKGBUILD for p does)
• Aurget considers a missing PKGBUILD as "no dependencies" and continues with the build
• The build will fail when makepkg can't satisfy x (because it's in the AUR)

What should happen

• Aurget should download p's PKGBUILD and use it to resolve dependencies
• Aurget should find x and add it as a dependency target
• Building should succeed

Proposed fixes

• I wonder if not finding the PKGBUILD should blow up
• We probably need to hit the AUR API to know that we need p's PKGBUILD to resolve dependencies for q

Workaround

In general, manually resolve the dependencies:

aurget -Sy --deps --asdep x
aurget -Sy --deps q

Note that

aurget -Sy --deps x q

Will also work, but x will be installed explicitly and therefore would not be removed automatically with pacman -Rsn q, or be show in pacman -Qdt output when/if q were uninstalled.