Cocoapods - podspec validates but can't be pushed to repo - swift

Question

I am setting up a Swift framework through CocoaPods.
Goals are:
Use a private repo for the Podspecs
Have the framework to be distributed as binary (as opposed to source code)
I've read already the CocoaPods frameworks, Making a CocoaPod plus other references (can't seem to be able to include more than 2 links with current SO reputation but I can point sources in comments).
The Podspec I am using is:
Pod::Spec.new do |s|
s.name = 'SDK'
s.version = '0.0.1'
s.summary = 'My SDK'
s.description = 'SDKs description'
s.homepage = 'https://github.com/XXX/sdk'
s.license = { :type => 'MIT', :file => 'LICENSE' }
s.author = { 'XXX' => 'xxx#xxx.com' }
s.source = { :git => 'https://github.com/XXX/sdk.git', :tag => s.version.to_s }
s.ios.deployment_target = '8.0'
s.platform = :ios, '9.0'
s.source_files = 'SDK/Classes/**/*'
s.preserve_paths = 'Frameworks/SDK.framework'
s.ios.vendored_frameworks = 'Frameworks/SDK.framework'
end
The Pods xcode project was changed to build also i386 arch besides the standard (arm64, armv7).
This spec successfully validates locally with, provided that I copy the SDK.framework file to the /Frameworks folder in the .podspec folder:
pod lib lint
Issue: when I try to push the spec to the repo, the validation fails as the output below show:
pod repo push mySDKPrivateRepo SDK.podspec
Validating spec
-> SDK (0.0.1)
- ERROR | [iOS] file patterns: The `source_files` pattern did not match any file.
- ERROR | file patterns: The `preserve_paths` pattern did not match any file.
- ERROR | [iOS] file patterns: The `vendored_frameworks` pattern did not match any file.
[!] The `SDK.podspec` specification does not validate.
Questions:
How can I make the podspec validation successful when pushing it to repo?
Other notes:
Copying the SDK.framework to /Frameworks works manually.
If I include a Copy Files build step in the Pods Xcode project the file is not copied.
Using CocoaPods 1.1.0.

Answer 1

I was having a similar problem, the culprit was the project structure itself.
Be sure to check your at which directory you're pointing your source_files to. I've found that maintaining any kind of structure in this way is very difficult and it's easier to include all of your files in a single folder.
s.source_files = '<InsertName>/**/Classes/*'
Take a look at cocoapods advice on File Patters for some help on this.
By a process of elimination, I would suggest trying to push to the repo commenting out source_files in the podspec first, and work your way forward from there.