Cocoapods: A fallback option for source repo when CDN is not available

[RenGate]

• [+] I've read and understood the CONTRIBUTING guidelines and have done my best effort to follow. 🌈

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What did you do?

On July 22, run pod install --repo-update. Most of the time CDN repo works great, however sometimes it returns either 404 or 500 status codes which leads to failed pod installation. Is there a way to specify git repo as an optional fallback specs repo that will be used when CDN is unreachable?

What did you expect to happen?

Install all pod dependencies correctly.

What happened instead?

Received following errors due to CDN error:

[19:09:00]: ▸ Updating local specs repositories
[19:09:00]: ▸ [!] CDN: cocoapods- Repo update failed - 2312 error(s):
[19:09:00]: ▸ CDN: cocoapods- Relative path couldn't be downloaded: CocoaPods-version.yml Response: 500
(other errors mentioning 500 response code)

CocoaPods Environment

Stack

   CocoaPods : 1.7.4
        Ruby : ruby 2.4.5p335 (2018-10-18 revision 65137) [x86_64-darwin18]
    RubyGems : 2.6.14.3
        Host : Mac OS X 10.14.5 (18F132)
       Xcode : 10.2.1 (10E1001)
         Git : git version 2.20.1 (Apple Git-117)
Ruby lib dir : /Users/rostyslav/.rbenv/versions/2.4.5/lib
Repositories : 

               master - https://github.com/CocoaPods/Specs.git @ f085f117e81fa6c3f99a51b44f317674321414f6

Installation Source

Executable Path: /Users/rostyslav/.rbenv/versions/2.4.5/bin/pod

Plugins

cocoapods-deintegrate : 1.0.4
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-stats       : 1.1.0
cocoapods-trunk       : 1.3.1
cocoapods-try         : 1.1.0

Podfile

using_bundler = defined? Bundler
unless using_bundler
  puts "\nPlease re-run using:".red
  puts "  bundle exec pod install\n\n"
  exit(1)
end

platform :ios, '11.0'
workspace 'Workspace.xcworkspace'

project 'Common/Common.xcodeproj'
project 'Project1/Project1.xcodeproj'
project 'Project2/Project2.xcodeproj'

inhibit_all_warnings!
use_frameworks!
supports_swift_versions '>= 4.0', '<= 5.0'

install! 'cocoapods',
         :generate_multiple_pod_projects => true,
         :incremental_installation => true

source 'https://cdn.cocoapods.org/'

def common_analytics_pods
  pod 'Fabric'
  pod 'Crashlytics'
end

def common_mvvm_pods
  pod 'Dip'
end

def common_networking
  pod 'TRON', branch: "master", git: "https://github.com/MLSDev/TRON.git"
  pod 'SwiftyJSON'
  pod 'AlamofireImage', branch: "master", git: "https://github.com/Alamofire/AlamofireImage.git"
end

def common_ui_pods
  pod 'DTTableViewManager'
  pod 'DTCollectionViewManager'
  pod 'LoadableViews'
  pod 'JGProgressHUD'
  pod 'PhoneNumberKit', '~> 2.6'
  pod 'Ariadne'
  pod 'AloeStackView'
  pod 'SwiftMessages'
end

def common_code_generation_pods
  pod 'Sourcery'
  pod 'SwiftGen'
  pod 'SwiftLint'
end

def common_rx_pods
  pod 'RxSwift'
  pod 'RxCocoa'
  pod 'RxOptional'
  pod 'RxGesture'
  pod 'Action'
  pod 'RxKeyboard'
end

def common_tests_pods
  pod 'RxTest'
  pod 'RxBlocking'
end

def common_storage_pods
  pod 'KeychainSwift', '~> 15.0'
end

def common_sugar_pods
  pod 'Then'
end

target 'Common' do
  project 'Common/Common.xcodeproj'

  # RxSwift
  common_rx_pods

  # UIKit
  common_ui_pods

  # CodeGeneration
  pod 'SwiftGen'

  # Storage
  common_storage_pods

  # Network
  common_networking

  # MVVM
  common_mvvm_pods

  # Syntactic sugar
  common_sugar_pods

  # Analytics
  pod 'Crashlytics'

  target 'CommonTests' do
    project 'Common/Common.xcodeproj'
    common_tests_pods
  end
end

abstract_target 'AT' do
    target 'CoreProject1' do
        project 'Project1/Project1.xcodeproj'
        # RxSwift
        common_rx_pods

        # Code Generation
        common_code_generation_pods

        # UIKit
        pod 'StatefulViewController'
        pod 'CVCalendar'
        common_ui_pods

        # MVVM
        common_mvvm_pods

        # Navigation
        pod 'GoogleMaps'
        pod 'GooglePlaces'

        # Network
        pod 'EasyMapping'
        pod 'AlamofireImage', branch: "master", git: "https://github.com/Alamofire/AlamofireImage.git"
        pod 'ActionCableClient', branch: "master", git: "https://github.com/danielrhodes/Swift-ActionCableClient.git"
        common_networking

        # Syntactic sugar
        common_sugar_pods

        # Storage
        common_storage_pods

        # Analytics
        pod 'Firebase/Core'
        common_analytics_pods

        target 'TestsProject1' do
          project 'Project1/Project1.xcodeproj'
          common_tests_pods
          pod 'Nimble'
          pod 'Datez'
        end

        target 'Project1' do
          project 'Project1/Project1.xcodeproj'
        end

        target 'Proto' do
          project 'Project1/Project1.xcodeproj'
        end
    end

    target 'CoreProject2' do
      project 'Project2/Project2.xcodeproj'
      # RxSwift
      common_rx_pods

      # CodeGeneration
      common_code_generation_pods

      # UIKit
      common_ui_pods
      pod 'AlignedCollectionViewFlowLayout'

      # MVVM
      common_mvvm_pods

      # Networking
      common_networking

      # Analytics
      pod 'Firebase/Core'

      # Storage
      common_storage_pods

      # Syntactic sugar
      common_sugar_pods

      target 'TestsHelper' do
        project 'Project2/Project2.xcodeproj'

        target 'TestsProject2' do
          project 'Project2/Project2.xcodeproj'
          common_tests_pods
        end
      end

      target 'Project2' do
        project 'Project2/Project2.xcodeproj'
        common_analytics_pods
      end
    end
end

post_install do |installer|
  installer.generated_projects.each do |project|
    project.targets.each do |target|

      # CocoaPods 1.7.0.beta.2 wrongly sets architecture flag to ARCH64 instead of using standard architecture option, which leads to warnings.
      target.build_configurations.each do |configuration|
        configuration.build_settings.delete('ARCHS')
      end

      # Sets build settings for additional Debug schemes, for example FooDebug
      target.build_configurations.each do |configuration|
        if configuration.name.include? 'Debug'
          configuration.build_settings['SWIFT_OPTIMIZATION_LEVEL'] = ['-Onone']
          configuration.build_settings['GCC_OPTIMIZATION_LEVEL'] = ['0']
          configuration.build_settings['SWIFT_ACTIVE_COMPILATION_CONDITIONS'] = 'DEBUG'
          configuration.build_settings['SWIFT_COMPILATION_MODE'] = 'singlefile'
          configuration.build_settings['DEBUG_INFORMATION_FORMAT'] = 'dwarf'
          configuration.build_settings['VALIDATE_PRODUCT'] = 'NO'
        end
      end
    end

    # Sets build settings for additional Debug schemes, for example FooDebug
    project.build_configurations.each do |configuration|
      if configuration.name.include? 'Debug'
          project.build_settings(configuration.name)['ONLY_ACTIVE_ARCH'] = 'YES'
          project.build_settings(configuration.name)['ENABLE_TESTABILITY'] = 'YES'
      end
    end
  end
end

[dnkoutso]

Can you not add the master repo as git in your Podfile

source 'https://github.com/CocoaPods/Specs.git'

?

[RenGate]

I can, but that would cause the git repo to update each time pod install --repo-update is executed even when CDN repo is online, which would eliminate speed improvement from using CDN. What I am looking for is a way to specify CDN as some sort of a primary repo and git as a secondary. The secondary slower repo would only be updated and used if for whatever reason primary repo failed.

[dnkoutso]

This is not currently supported. You can either use both and therefore both will need to be updated once --repo-update is invoked or you can use just one.

You can only circumvent this by invoking pod repo update [NAME] _before_ you invoke pod install (without --repo-update) but pod install does not currently offer a way to exclude a repo from updating once --repo-update is passed.

[RenGate]

Thanks for the idea. The following script solves the problem:

pod repo update cocoapods-
if [ $? -ne 0 ]; then
    echo "Failed to update CDN Specs repo. Falling back on Git repo."
    pod repo update master
fi
pod install

[dnkoutso]

Thank you for filing!