Cocoapods: `pod spec lint` fails because it can't find a simulator.

Created on 5 Oct 2018 · 44Comments · Source: CocoaPods/CocoaPods

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

Report

What did you do?

[email protected]:Alamofire/Alamofire.git
cd Alamofire
pod spec lint

What did you expect to happen?

I expect validation to succeed

What happened instead?

 -> Alamofire (4.7.3)
    - ERROR | [iOS] unknown: Encountered an unknown error (Could not find a `ios` simulator (valid values: ). Ensure that Xcode -> Window -> Devices has at least one `ios` simulator listed or otherwise add one.) during validation.

Analyzed 1 podspec.

CocoaPods Environment

Stack

   CocoaPods : 1.5.3
        Ruby : ruby 2.3.7p456 (2018-03-28 revision 63024) [universal.x86_64-darwin17]
    RubyGems : 2.5.2.3
        Host : Mac OS X 10.13.6 (17G2208)
       Xcode : 9.4.1 (9F2000)
         Git : git version 2.18.0
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib
Repositories : jute - [email protected]:modolabs/jute.git @ 6b6ff97fe21586098fb3bb59d107a710fd10d890
               master - https://github.com/CocoaPods/Specs.git @ 7cba4f2f2fdee44d5532c613b2e049609b3a010c

Installation Source

Executable Path: /usr/local/bin/pod

Plugins

cocoapods-deintegrate : 1.0.2
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-stats       : 1.0.0
cocoapods-trunk       : 1.3.0
cocoapods-try         : 1.1.0

Project that demonstrates the issue

https://github.com/Alamofire/Alamofire

I can't push my private repo because of this issue, realized I also couldn't lint Alamofire.
Read in some other issues that may be related to output the simctl

$ xcrun simctl list
== Device Types ==
iPhone 4s (com.apple.CoreSimulator.SimDeviceType.iPhone-4s)
iPhone 5 (com.apple.CoreSimulator.SimDeviceType.iPhone-5)
iPhone 5s (com.apple.CoreSimulator.SimDeviceType.iPhone-5s)
iPhone 6 (com.apple.CoreSimulator.SimDeviceType.iPhone-6)
iPhone 6 Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-6-Plus)
iPhone 6s (com.apple.CoreSimulator.SimDeviceType.iPhone-6s)
iPhone 6s Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-6s-Plus)
iPhone 7 (com.apple.CoreSimulator.SimDeviceType.iPhone-7)
iPhone 7 Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-7-Plus)
iPhone 8 (com.apple.CoreSimulator.SimDeviceType.iPhone-8)
iPhone 8 Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-8-Plus)
iPhone SE (com.apple.CoreSimulator.SimDeviceType.iPhone-SE)
iPhone X (com.apple.CoreSimulator.SimDeviceType.iPhone-X)
iPad 2 (com.apple.CoreSimulator.SimDeviceType.iPad-2)
iPad Retina (com.apple.CoreSimulator.SimDeviceType.iPad-Retina)
iPad Air (com.apple.CoreSimulator.SimDeviceType.iPad-Air)
iPad Air 2 (com.apple.CoreSimulator.SimDeviceType.iPad-Air-2)
iPad (5th generation) (com.apple.CoreSimulator.SimDeviceType.iPad--5th-generation-)
iPad Pro (9.7-inch) (com.apple.CoreSimulator.SimDeviceType.iPad-Pro--9-7-inch-)
iPad Pro (12.9-inch) (com.apple.CoreSimulator.SimDeviceType.iPad-Pro)
iPad Pro (12.9-inch) (2nd generation) (com.apple.CoreSimulator.SimDeviceType.iPad-Pro--12-9-inch---2nd-generation-)
iPad Pro (10.5-inch) (com.apple.CoreSimulator.SimDeviceType.iPad-Pro--10-5-inch-)
iPad (6th generation) (com.apple.CoreSimulator.SimDeviceType.iPad--6th-generation-)
Apple TV (com.apple.CoreSimulator.SimDeviceType.Apple-TV-1080p)
Apple TV 4K (com.apple.CoreSimulator.SimDeviceType.Apple-TV-4K-4K)
Apple TV 4K (at 1080p) (com.apple.CoreSimulator.SimDeviceType.Apple-TV-4K-1080p)
Apple Watch - 38mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-38mm)
Apple Watch - 42mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-42mm)
Apple Watch Series 2 - 38mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-2-38mm)
Apple Watch Series 2 - 42mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-2-42mm)
Apple Watch Series 3 - 38mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-3-38mm)
Apple Watch Series 3 - 42mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-3-42mm)
== Runtimes ==
iOS 11.4 (11.4 - 15F79) - com.apple.CoreSimulator.SimRuntime.iOS-11-4
tvOS 11.4 (11.4 - 15L576) - com.apple.CoreSimulator.SimRuntime.tvOS-11-4
watchOS 4.3 (4.3 - 15T212) - com.apple.CoreSimulator.SimRuntime.watchOS-4-3
== Devices ==
-- iOS 11.4 --
    iPhone X (8806A212-8BB5-4562-AF3F-B91E4BE8E97D) (Shutdown)
-- tvOS 11.4 --
-- watchOS 4.3 --
    Apple Watch - 38mm (585EEB1B-A2C0-4620-AE86-EABF9968FC3A) (Shutdown)
    Apple Watch - 42mm (3621379B-567F-4AF4-9E75-796AADBFD1C2) (Shutdown)
== Device Pairs ==

Source

atreat

Most helpful comment

do below steps it solved my issue For XCode 10.2 beta 4

sudo gem uninstall fourflusher
sudo gem install fourflusher
sudo gem update cocoapods

hitendradeveloper on 20 Mar 2019

👍11

All 44 comments

This seems a configuration issue on your end. I just tried the same on the same repo and it successfully built.

It also appears you are on Xcode 9.4.1 from the report. If you are on Xcode 10.1 Beta then this fix was merged yesterday https://github.com/CocoaPods/fourflusher/pull/11.

I am going to preemptively close this one and I will re-open it if we find out its a CocoaPods library issue instead.

Analyzed 1 podspec.

Alamofire.podspec passed validation.

dnkoutso on 5 Oct 2018

When I switch to the Xcode Beta I get similar results...

Stack

   CocoaPods : 1.5.3
        Ruby : ruby 2.3.7p456 (2018-03-28 revision 63024) [universal.x86_64-darwin17]
    RubyGems : 2.5.2.3
        Host : Mac OS X 10.13.6 (17G2208)
       Xcode : 10.1 (10O35n)
         Git : git version 2.18.0
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib
Repositories : jute - [email protected]:modolabs/jute.git @ 6b6ff97fe21586098fb3bb59d107a710fd10d890
               master - https://github.com/CocoaPods/Specs.git @ 7cba4f2f2fdee44d5532c613b2e049609b3a010c

Installation Source

Executable Path: /usr/local/bin/pod

Plugins

cocoapods-deintegrate : 1.0.2
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-stats       : 1.0.0
cocoapods-trunk       : 1.3.0
cocoapods-try         : 1.1.0

$ xcrun simctl list
== Device Types ==
iPhone 4s (com.apple.CoreSimulator.SimDeviceType.iPhone-4s)
iPhone 5 (com.apple.CoreSimulator.SimDeviceType.iPhone-5)
iPhone 5s (com.apple.CoreSimulator.SimDeviceType.iPhone-5s)
iPhone 6 (com.apple.CoreSimulator.SimDeviceType.iPhone-6)
iPhone 6 Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-6-Plus)
iPhone 6s (com.apple.CoreSimulator.SimDeviceType.iPhone-6s)
iPhone 6s Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-6s-Plus)
iPhone 7 (com.apple.CoreSimulator.SimDeviceType.iPhone-7)
iPhone 7 Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-7-Plus)
iPhone 8 (com.apple.CoreSimulator.SimDeviceType.iPhone-8)
iPhone 8 Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-8-Plus)
iPhone SE (com.apple.CoreSimulator.SimDeviceType.iPhone-SE)
iPhone X (com.apple.CoreSimulator.SimDeviceType.iPhone-X)
iPhone XR (com.apple.CoreSimulator.SimDeviceType.iPhone-XR)
iPhone XS (com.apple.CoreSimulator.SimDeviceType.iPhone-XS)
iPhone XS Max (com.apple.CoreSimulator.SimDeviceType.iPhone-XS-Max)
iPad 2 (com.apple.CoreSimulator.SimDeviceType.iPad-2)
iPad Retina (com.apple.CoreSimulator.SimDeviceType.iPad-Retina)
iPad Air (com.apple.CoreSimulator.SimDeviceType.iPad-Air)
iPad Air 2 (com.apple.CoreSimulator.SimDeviceType.iPad-Air-2)
iPad (5th generation) (com.apple.CoreSimulator.SimDeviceType.iPad--5th-generation-)
iPad Pro (9.7-inch) (com.apple.CoreSimulator.SimDeviceType.iPad-Pro--9-7-inch-)
iPad Pro (12.9-inch) (com.apple.CoreSimulator.SimDeviceType.iPad-Pro)
iPad Pro (12.9-inch) (2nd generation) (com.apple.CoreSimulator.SimDeviceType.iPad-Pro--12-9-inch---2nd-generation-)
iPad Pro (10.5-inch) (com.apple.CoreSimulator.SimDeviceType.iPad-Pro--10-5-inch-)
iPad (6th generation) (com.apple.CoreSimulator.SimDeviceType.iPad--6th-generation-)
Apple TV (com.apple.CoreSimulator.SimDeviceType.Apple-TV-1080p)
Apple TV 4K (com.apple.CoreSimulator.SimDeviceType.Apple-TV-4K-4K)
Apple TV 4K (at 1080p) (com.apple.CoreSimulator.SimDeviceType.Apple-TV-4K-1080p)
Apple Watch - 38mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-38mm)
Apple Watch - 42mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-42mm)
Apple Watch Series 2 - 38mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-2-38mm)
Apple Watch Series 2 - 42mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-2-42mm)
Apple Watch Series 3 - 38mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-3-38mm)
Apple Watch Series 3 - 42mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-3-42mm)
Apple Watch Series 4 - 40mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-4-40mm)
Apple Watch Series 4 - 44mm (com.apple.CoreSimulator.SimDeviceType.Apple-Watch-Series-4-44mm)
== Runtimes ==
iOS 12.1 (12.1 - 16B5068g) - com.apple.CoreSimulator.SimRuntime.iOS-12-1
tvOS 12.1 (12.1 - 16J5584c) - com.apple.CoreSimulator.SimRuntime.tvOS-12-1
watchOS 5.1 (5.1 - 16R5568d) - com.apple.CoreSimulator.SimRuntime.watchOS-5-1
== Devices ==
-- iOS 12.1 --
    iPhone 8 (62D67846-2DB6-4530-9A27-C7CFDA87D6FD) (Shutdown)
    iPhone X (C9C4C06E-D0BA-424F-838E-F0FF5C7E249C) (Shutdown)
-- tvOS 12.1 --
-- watchOS 5.1 --
== Device Pairs ==

$ pod spec lint

 -> Alamofire (4.7.3)
    - ERROR | [iOS] unknown: Encountered an unknown error (Could not find a `ios` simulator (valid values: ). Ensure that Xcode -> Window -> Devices has at least one `ios` simulator listed or otherwise add one.) during validation.

Analyzed 1 podspec.

[!] The spec did not pass validation, due to 1 error.

atreat on 5 Oct 2018

Sorry again, this continues to appear a configuration issue with Xcode, and iOS simulator on your machine.

The CocoaPods build is green that builds a bunch of projects and I was also able to lint the exact repo you mentioned successfully.

It is best to ask StackOverflow under cocoapods tag.

dnkoutso on 5 Oct 2018

That looks like what I was experiencing that led to the aforementioned fourflusher PR. @atreat, if you’re using Bundler, try adding this line to get that version:

gem "fourflusher", :git => 'https://github.com/CocoaPods/fourflusher', :branch => 'master'

That fixed it for me.

SlaunchaMan on 5 Oct 2018

👍3

@SlaunchaMan the initial report though was using Xcode 9 not Xcode 10.1 beta

dnkoutso on 5 Oct 2018

maybe I am wrong though and its not tied to that?

dnkoutso on 5 Oct 2018

@SlaunchaMan thanks for the tip, thats exactly what I ended up doing.

@dnkoutso I didn't see any difference between Xcode versions, looks like it was just the fourflusher issue.

atreat on 5 Oct 2018

Thanks for confirming. Apologies for just saying it was your wrong configuration. Seems like the issue is fixed and others can apply the same workaround.

dnkoutso on 5 Oct 2018

@dnkoutso The confusing thing is that even if you’re using a different Xcode version, if you have 10.1 _installed_, it’ll use the new format.

SlaunchaMan on 6 Oct 2018

👍4

Can we assume that fourflusher will be bumped on cocoapods 1.6.0?

crsantos on 9 Oct 2018

Yes but you can also point to fourflusher latest as described above :)

dnkoutso on 9 Oct 2018

👍1

I know, but was just asking.
I was opening a new issue/doubt and then I saw this was already fixed 🙏

crsantos on 9 Oct 2018

I'm having the same issue and don't understand the workaround. Anyone able to provide guidance?

seanrucker on 16 Oct 2018

gem "fourflusher", :git => 'https://github.com/CocoaPods/fourflusher', :branch => 'master'

Using https://bundler.io/v1.12/git.html

dnkoutso on 16 Oct 2018

👍1

Another workaround is available at https://stackoverflow.com/questions/52742003/cocoapods-cant-find-simulators-pod-repo-push-fails for those not using blunder.

Coeur on 19 Oct 2018

👍4 ❤3 🎉3 😕1 👎1

@crsantos well, you gave me a -1, but at least I made a pull request for that: #8203

Coeur on 19 Oct 2018

@Coeur Cool stuff bro, nice job.

But this is not Stackoverflow, I'm not leaving you a negative review.
But changing the lib directly is not the proper way to do this, so that's why I did that.

crsantos on 19 Oct 2018

I now get this when trying the Gemfile workaround...

Fetching https://github.com/CocoaPods/fourflusher
Fetching gem metadata from https://rubygems.org/...........
Resolving dependencies...
Bundler could not find compatible versions for gem "fourflusher":
  In Gemfile:
    fourflusher

    cocoapods (~> 1.5.0) was resolved to 1.5.3, which depends on
      fourflusher (~> 2.0.1)

Could not find gem 'fourflusher (~> 2.0.1)', which is required by gem 'cocoapods (~> 1.5.0)', in any of the relevant sources:
  https://github.com/CocoaPods/fourflusher (at master@bf4c2ff)

Gemfile:

source 'https://rubygems.org'

gem 'cocoapods', '~> 1.5.0'
gem "fourflusher", git: 'https://github.com/CocoaPods/fourflusher', branch: 'master'

atreat on 19 Oct 2018

Following suit with cocoapods results in a similar output:

Fetching https://github.com/CocoaPods/cocoapods
Fetching https://github.com/CocoaPods/fourflusher
Fetching gem metadata from https://rubygems.org/.........
Resolving dependencies...
Bundler could not find compatible versions for gem "fourflusher":
  In Gemfile:
    fourflusher

    cocoapods was resolved to 1.6.0.beta.2, which depends on
      fourflusher (~> 2.0.1)

Could not find gem 'fourflusher (~> 2.0.1)', which is required by gem 'cocoapods', in any of the relevant sources:
  https://github.com/CocoaPods/fourflusher (at master@bf4c2ff)

Gemfile:

source 'https://rubygems.org'

gem 'cocoapods',  git: 'https://github.com/CocoaPods/cocoapods', branch: 'master'
gem "fourflusher", git: 'https://github.com/CocoaPods/fourflusher', branch: 'master'

atreat on 19 Oct 2018

In order to get a release out I had to forego the spec linting and manually add the spec file to my private spec repo. Then also push the spec repo manually.

I don't recommend doing this at all. Just leaving a note as to what I had to do.

atreat on 19 Oct 2018

Until the dependency issue is fixed, using the old fourflusher commit before the 2.1 release does the trick as workaround:

source 'http://rubygems.org'

gem "cocoapods", '1.6.0.beta.2'
gem "fourflusher", :git => 'https://github.com/CocoaPods/fourflusher', :ref => '5639cc4'

ralfebert on 20 Oct 2018

👍3

@ralfebert I bet the fix will be merged for 1.6.0.beta.3.

Coeur on 20 Oct 2018

@ralfebert I've tried your gemfile and it didn't work I still get the same error, could you explain me with more details, what did you it?

cerezo074 on 23 Oct 2018

We were bitten by this when our CI added Xcode 10 as an option. We solved it by manually updating fourflusher to version 2.1.0 and uninstalling version 2.0.1 before running pod spec lib:
gem uninstall fourflusher --force && gem install fourflusher

What's really interesting is that the error didn't even mention fourflusher:
2018-10-31T20:55:31.0794960Z -> AppCenter (1.10.1) - ERROR | [iOS] unknown: Encountered an unknown error (Could not find a `ios` simulator (valid values: ). Ensure that Xcode -> Window -> Devices has at least one `ios` simulator listed or otherwise add one.) during validation. [!] The `AppCenter.podspec` specification does not validate.

What's curious is that I could not reproduce this locally. Maybe because I have "old" simulators that were created with Xcode 9? 🤔

ElektrojungeAtWork on 1 Nov 2018

👍1

Can someone explain in really basic terms what I have to do to work around this issue? I have had no luck with uninstalling/reinstalling different versions of fourflusher.

jdrukman on 6 Nov 2018

@dnkoutso

Can you tell me where to add this code?

Which local folder?

gem "fourflusher", :git => 'https://github.com/CocoaPods/fourflusher', :branch => 'master'

ripperhe on 22 Nov 2018

👍1

do below steps it solved my issue For XCode 10.2 beta 4

sudo gem uninstall fourflusher
sudo gem install fourflusher
sudo gem update cocoapods

hitendradeveloper on 20 Mar 2019

👍11

@hitendradeveloper simply updating cocoapods to 1.6.0 or newer should be enough for Xcode 10.2 compatibility.

Coeur on 20 Mar 2019

👍7 ❤1

@Coeur trying to understand something that should be basic:

$ sudo gem uninstall cocoapods
Password:
Successfully uninstalled cocoapods-1.5.3
Remove executables:
    pod, sandbox-pod

in addition to the gem? [Yn]  y
Removing pod
Removing sandbox-pod
Successfully uninstalled cocoapods-1.5.3
$ sudo gem install cocoapods -v 1.6.1
Fetching cocoapods-1.6.1.gem
Successfully installed cocoapods-1.6.1
Parsing documentation for cocoapods-1.6.1
Installing ri documentation for cocoapods-1.6.1
Done installing documentation for cocoapods after 1 seconds
1 gem installed
$ pod --version
1.5.3
$ sudo gem list cocoapods

*** LOCAL GEMS ***

cocoapods (1.6.1)
cocoapods-core (1.6.1, 1.5.3)
cocoapods-deintegrate (1.0.4, 1.0.2)
cocoapods-downloader (1.2.2)
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)
$ gem uninstall cocoapods-core -v 1.5.3
Successfully uninstalled cocoapods-core-1.5.3
$ pod spec lint LocalizedCountryList.podspec
 -> LocalizedCountryList (2.0.0)
    - ERROR | [iOS] unknown: Encountered an unknown error (Could not find a `ios` simulator (valid values: com.apple.coresimulator.simruntime.ios-10-3, com.apple.coresimulator.simruntime.ios-11-0, com.apple.coresimulator.simruntime.ios-11-4, com.apple.coresimulator.simruntime.ios-12-2, com.apple.coresimulator.simruntime.ios-9-3, com.apple.coresimulator.simruntime.tvos-12-2, com.apple.coresimulator.simruntime.watchos-5-2). Ensure that Xcode -> Window -> Devices has at least one `ios` simulator listed or otherwise add one.) during validation.

Analyzed 1 podspec.

[!] The spec did not pass validation, due to 1 error.
$ pod --version
1.5.3

I have uninstalled and reinstalled cocoapods multiple times and it just stays claiming it is 1.5.3. I am just trying to update to 1.6.1 so I could pass this simulator spec lint error. What on earth could i possibly have configured here for it to do this and never update / use correct version?

EDIT:
I had to manually force remove pod and sandbox-pod from /usr/local/bin, run sudo gem install cocoapods, manually add pod to/usr/local/binviasudo gem install -n /usr/local/bin cocoapods`

shouldn't gem install and gem uninstall handle this stuff already?! (at least linting worked now)

mmdock on 26 Apr 2019

@mmdock that's really off-topic for this issue. You should have opened an issue at https://github.com/rubygems/rubygems/issues instead.

And instead of manually removing files, you could try sudo gem uninstall -n /usr/local/bin cocoapods

Coeur on 27 Apr 2019

@Coeur sorta off topic yeah. However, it was what i needed to do to get my spec lint working so might be relevant to someone. if one person could encounter this issue, so could others. Considering that this looks to be a relatively silent issue related to rubygems updating cocoapods correctly....

mmdock on 27 Apr 2019

Same error, Xcode 10.1, Xcode 11 beta are installed.

$ pod lib lint

 -> Unicore (2.0.0)
    - ERROR | [iOS] unknown: Encountered an unknown error (Could not find a `ios` simulator (valid values: ). Ensure that Xcode -> Window -> Devices has at least one `ios` simulator listed or otherwise add one.) during validation.

[!] Unicore did not pass validation, due to 1 error.
You can use the `--no-clean` option to inspect any issue.

Simulators window contains all iOS simulators needed

MaximBazarov on 5 Jun 2019

👍2

[iOS] unknown: Encountered an unknown error (Could not find a ios simulator (valid values: ). Ensure that Xcode -> Window -> Devices has at least one ios simulator listed or otherwise add one.

Adrift001 on 5 Jun 2019

👍2

@MaximBazarov @Adrift001 please open a separate issue for Xcode 11 beta.
Here it was for Xcode 10.1 and it got fixed long ago by https://github.com/CocoaPods/fourflusher/pull/11.

Coeur on 5 Jun 2019

@Coeur

xcrun simctl delete unavailable

Edit fourflusher find.rb

if device['availability'] == '(available)' || device['isAvailable'] == true || device['isAvailable'] == 'YES' || device['isAvailable'] == 'true'
        Simulator.new(device, os_name, os_version)
  end

dimsky on 5 Jun 2019

👍5 🎉3

@dimsky there is already a Pull Request for that. Let's continue in the other thread, #8875.

Coeur on 5 Jun 2019

Confirming @dimsky code fixed the issue introduced in Xcode 11 Beta.

RicardoKoch on 5 Jun 2019

👍2

For my Xcode 11 Beta sudo gem update solved the issue!

jogendra on 13 Jun 2019

On Xcode 10.2, oses.include?(os) will fail.

unless oses.include?(os)
        fail "Could not find a `#{os}` simulator (valid values: #{oses.join(', ')}). Ensure that "\
          "Xcode -> Window -> Devices has at least one `#{os}` simulator listed or otherwise add one."
      end

And oses will print as below.

com.apple.coresimulator.simruntime.ios-10-3
com.apple.coresimulator.simruntime.ios-11-4
com.apple.coresimulator.simruntime.ios-8-4

Should replace oses.include?(os) to oses.to_s.include?(os.to_s). It works for me.

And i found that fourflusher 2.3.0 fix this issue for XCode 10.2
https://github.com/CocoaPods/fourflusher/blob/master/lib/fourflusher/find.rb

device_list.flat_map do |runtime_str, devices|
        # This format changed with Xcode 10.2.
        if runtime_str.start_with?('com.apple.CoreSimulator.SimRuntime.')
          # Sample string: com.apple.CoreSimulator.SimRuntime.iOS-12-2
          _unused, os_info = runtime_str.split 'com.apple.CoreSimulator.SimRuntime.'
          os_name, os_major_version, os_minor_version = os_info.split '-'
          os_version = "#{os_major_version}.#{os_minor_version}"
        else
          # Sample string: iOS 9.3
          os_name, os_version = runtime_str.split ' '
        end

        devices.map do |device|
          device_is_available = device['isAvailable'] == 'YES' || device['isAvailable'] == true

          if device['availability'] == '(available)' || device_is_available
            Simulator.new(device, os_name, os_version)
          end
        end
      end.compact.sort(&:sim_list_compare)
    end

karosLi on 2 Jul 2019

@karosLi it was already mentioned above, where we linked 27 days ago to #8875, itself linking to #8878, itself released with CocoaPods 1.7.2, 19 days ago. So a simple gem update will solve it. The character L from Death Note would have find this out already. ;)

And note that it's spelled Xcode, not XCode.

Coeur on 2 Jul 2019

👍1

gem update fourflusher also separate should do it.

dnkoutso on 2 Jul 2019

👍2

@karosLi it was already mentioned above, where we linked 27 days ago to #8875, itself linking to #8878, itself released with CocoaPods 1.7.2, 19 days ago. So a simple gem update will solve it. The character L from Death Note would have find this out already. ;)

And note that it's spelled Xcode, not XCode.

hahahaha, you are a very humorous and careful man. I like you.

Currently as some reason, we have to keep using CocoaPods 1.5.3. So based on this background, we can not upgrade to 1.7.2. For us to resolve this issue on CocoaPods 1.5.3, the best way is to use latest find.rb file.

karosLi on 3 Jul 2019

gem update fourflusher also separate should do it.

Yes, i think so too.

karosLi on 3 Jul 2019

👍1

For those who have to use old version of Cocoapods and new version of Xcode, just change your local file ~/.gem/ruby/2.6.0/gems/fourflusher-2.0.1/lib/fourflusher/find.rb with find.rb from latest version of fourflusher https://github.com/CocoaPods/fourflusher.

We have to use Xcode 11.3, Cocoapods 1.5.3 and fourflusher-2.0.1 and pod spec lint works correctly after this manipulation.