SPM: allow pod specs to declare Swift Package Manager dependencies with spm_dependency

[mfazekas]

Implements: CocoaPods/CocoaPods#11942

See also: CocoaPods/CocoaPods#11953
First draft.

Note that I've implemented the keyword argument syntax:

spec.spm_dependency(
   :url => 'https://github.com/apple/swift-atomics.git',
   :requirement' => {:kind => 'upToNextMajorVersion',  :minimumVersion => '1.1.0'},
   :products' => ['Atomics']
)

But maybe using positional arguments would be better:

spec.spm_dependency(
   'https://github.com/apple/swift-atomics.git',
   {:kind => 'upToNextMajorVersion',  :minimumVersion => '1.1.0'},
   ['Atomics']
)

[Archish27]

🚀 Super Awesome, Can someone please check & get this merged?

[krishnkishore]

Is there a plan to merge and release this soon?

[bensonarafat]

Pls, when can this be merge soon

[zhu-xiaowei]

This is a very useful feature for developers using the CocoaPods managed project. Looking forward to merging soon.

[renanyoy]

what's the status of this PR ? is it available in cocoapod 1.14.3 ? is there still someone working on cocoapod ?

[eleazar0425]

Is this getting merged soon?

[Dunedubby]

Any update with getting this merged?