SolvedCocoaPods 'Pod Spec Lint' failed validation

Yes, I am using the latest CocoaPods release

Cocoapods version: 1.6.0.beta.1
XCode version: Version 10.0


What did you do?

I created a pod spec file with 'pod spec create' and filled in the appropriate content         = "iMessageFramework"
  s.version      = "1.0.0"
  s.summary      = "Small test to test code sharing via cocoapods."
  s.description  = "This is some superl oco framework that was made by kevin vugts."
  s.homepage     = ""
  s.license      = "MIT"       = { "Kevin Vugts" => "" }
  s.platform     = :ios, "11.0"
  s.source       = { :git => "", :tag => "1.0.0" }
  s.source_files = "iMessageFramework/**/*"
  s.swift_version = '4.2'
  s.ios.deployment_target  = '11.0'
  s.pod_target_xcconfig = { 'SWIFT_VERSION' => '4.0' }

What did you expect to happen?

After I run 'pod spec lint --verbose' I received an build error from Xcode which I am not able to reproduce. I expected it to succesfully validate the spec file but it didn't.

What happened instead?

It threw the following error:

    error: Multiple commands produce '/var/folders/yx/cl0s1g4n5d17k4vqv1f860mh0000gn/T/CocoaPods-Lint-20180924-10333-tgiujl-iMessageFramework/DerivedData/App/Build/Products/Release-iphonesimulator/iMessageFramework/iMessageFramework.framework/Info.plist':
    1) Target 'iMessageFramework' (project 'Pods') has copy command from '/var/folders/yx/cl0s1g4n5d17k4vqv1f860mh0000gn/T/CocoaPods-Lint-20180924-10333-tgiujl-iMessageFramework/Pods/iMessageFramework/iMessageFramework/iMessageFramework/Info.plist' to '/var/folders/yx/cl0s1g4n5d17k4vqv1f860mh0000gn/T/CocoaPods-Lint-20180924-10333-tgiujl-iMessageFramework/DerivedData/App/Build/Products/Release-iphonesimulator/iMessageFramework/iMessageFramework.framework/Info.plist'
    2) Target 'iMessageFramework' (project 'Pods') has process command with output '/var/folders/yx/cl0s1g4n5d17k4vqv1f860mh0000gn/T/CocoaPods-Lint-20180924-10333-tgiujl-iMessageFramework/DerivedData/App/Build/Products/Release-iphonesimulator/iMessageFramework/iMessageFramework.framework/Info.plist'
    ** BUILD FAILED **
   Testing with `xcodebuild`. 
 -> iMessageFramework (1.0.0)
    - ERROR | [iOS] xcodebuild: Returned an unsuccessful exit code.```

The full output can be found in this pasty:

## Project that demonstrates the issue
18 Answers

✔️Accepted Answer

Confirmed this is the same as #8116. do |s|         = "iMessageFramework"
  s.version      = "1.0.0"
  s.summary      = "Small test to test code sharing via cocoapods."
  s.description  = "This is some superl oco framework that was made by kevin vugts."
  s.homepage     = ""
  s.license      = "MIT"       = { "Kevin Vugts" => "" }
  s.platform     = :ios, "11.0"
  s.source       = { :git => "", :tag => "1.0.0" }
  s.source_files = "iMessageFramework/**/*"
  s.exclude_files = "iMessageFramework/**/*.plist"
  s.swift_version = '4.2'
  s.ios.deployment_target  = '11.0'

This worked and I was able to lint successfully. Please remove Info.plist files from source glob or exclude them.

Also this line:

  s.pod_target_xcconfig = { 'SWIFT_VERSION' => '4.0' }

It is not currently used by CocoaPods so use s.swift_version instead.

Other Answers:

I was actually going to log the same issue this morning. This is due to the new build system that is now on by default in Xcode 10. The new build system is much stricter about what each step of the build is doing so that it can avoid doing duplicate work in order to speed up the build process. Unfortunately, I don't believe that Cocoapods full supports the new build system yet™.

What is happening here is that when Cocoapods creates the project for lint validation, the new build system is used even if the current project has the new build system turned off via the workspace setting (Project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings):

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "">
<plist version="1.0">

What I think would resolve this is a configuration option to pass to the lint command in order to tell xcodebuild not to use the new build system (i.e. -UseNewBuildSystem=NO) or to duplicate the project's workspace settings in the generated linter project.

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