TEMPLATE_DIR is outdated for XCode 11

[noelweichbrodt]

Command

/usr/local/bin/pod playgrounds Spokestack-iOS

Stack

   CocoaPods : 1.8.4
        Ruby : ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin19]
    RubyGems : 3.0.3
        Host : Mac OS X 10.15.1 (19B88)
       Xcode : 11.0 (11A420a)
         Git : git version 2.21.0 (Apple Git-122)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib
Repositories : master - git - https://github.com/CocoaPods/Specs.git @ c94f6c168be905a39e5c176afd5aa59ee2037d16
               trunk - CDN - https://cdn.cocoapods.org/

Plugins

cocoapods-deintegrate : 1.0.4
cocoapods-playgrounds : 1.2.2
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-stats       : 1.1.0
cocoapods-trunk       : 1.4.1
cocoapods-try         : 1.1.0

Error

Errno::ENOENT - No such file or directory @ dir_initialize - /Applications/Xcode.app/Contents/Developer/Library/Xcode/Templates/File Templates/Source/Playground with Platform Choice.xctemplate
/Library/Ruby/Gems/2.6.0/gems/cocoapods-playgrounds-1.2.2/lib/cocoapods-playgrounds/generate.rb:43:in `open'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-playgrounds-1.2.2/lib/cocoapods-playgrounds/generate.rb:43:in `foreach'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-playgrounds-1.2.2/lib/cocoapods-playgrounds/generate.rb:43:in `dir_for_platform'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-playgrounds-1.2.2/lib/cocoapods-playgrounds/generate.rb:10:in `initialize'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-playgrounds-1.2.2/lib/cocoapods-playgrounds/workspace.rb:26:in `new'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-playgrounds-1.2.2/lib/cocoapods-playgrounds/workspace.rb:26:in `block in generate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-playgrounds-1.2.2/lib/cocoapods-playgrounds/workspace.rb:23:in `chdir'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-playgrounds-1.2.2/lib/cocoapods-playgrounds/workspace.rb:23:in `generate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-playgrounds-1.2.2/lib/cocoapods-playgrounds/command/playgrounds.rb:46:in `run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.8.4/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.8.4/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'

Discussion

I'm not familiar with Ruby, but it looks like the offending bit is in generate.rb:
TEMPLATE_DIR = Pathname.new('Library/Xcode/Templates/File Templates/Source/Playground with Platform Choice.xctemplate'). I'm guessing that path has changed, possibly to /Applications/Xcode.app/Contents/Developer/Library/Xcode/Templates/File Templates/Source/Playground Page.xctemplate. I'll keep poking, but the metaprogramming that's happening makes it confusing to figure out where TEMPLATE_DIR is being generated.