ios開発 cocoapodsのコマンド "pod init"実行するが、Podfile作成できないエラーについて

Question

iosアプリ開発で、firebaseによる認証機能を実装しようとしています。
https://firebase.google.com/docs/auth/ios/facebook-login?hl=ja

xcode 11.5
swift5.1

しかし、その前段階で、つまづいています。
cocoapodsで各種ライブラリ

  pod 'Firebase/Auth'  
  pod 'FacebookSDK'
  pod 'Firebase/Core'
  pod 'FacebookCore'
  pod 'FacebookLogin'
  pod 'FacebookShare'
  pod 'SDWebImage/WebP'

を読み込もうとし、いつも通り、pod initしようとしますが、下記エラーがでます。
考えられる原因としては、先日homebrewをアップデートした気がしています。
versionは　2.4.1です。

/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: already initialized constant REST::VERSION
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:10: warning: previous definition of VERSION was here
Traceback (most recent call last):
	35: from /Users/eishunsudo/.rbenv/versions/2.6.2/bin/pod:23:in `<main>'
	34: from /Users/eishunsudo/.rbenv/versions/2.6.2/bin/pod:23:in `load'
	33: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/cocoapods-1.9.3/bin/pod:36:in `<top (required)>'
	32: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	31: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	30: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods.rb:17:in `<top (required)>'
	29: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods.rb:75:in `<module:Pod>'
	28: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	27: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	26: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/core_overrides.rb:1:in `<top (required)>'
	25: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	24: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	23: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/sources_manager.rb:4:in `<top (required)>'
	22: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	21: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	20: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest.rb:104:in `<top (required)>'
	19: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	18: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	17: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:3:in `<top (required)>'
	16: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:22:in `<module:REST>'
	15: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:67:in `<module:Error>'
	14: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:67:in `each'
	13: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:89:in `block in <module:Error>'
	12: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:86:in `extend_classes!'
	11: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:72:in `classes'
	10: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:72:in `map'
	 9: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:75:in `block in classes'
	 8: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:75:in `inject'
	 7: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:75:in `each'
	 6: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:76:in `block (2 levels) in classes'
	 5: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/nap-1.1.0/lib/rest/error.rb:76:in `const_get'
	 4: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	 3: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
	 2: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/2.6.0/openssl.rb:13:in `<top (required)>'
	 1: from /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require'
/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:92:in `require': dlopen(/Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/2.6.0/x86_64-darwin17/openssl.bundle, 9): Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib (LoadError)
  Referenced from: /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/2.6.0/x86_64-darwin17/openssl.bundle
  Reason: image not found - /Users/eishunsudo/.rbenv/versions/2.6.2/lib/ruby/2.6.0/x86_64-darwin17/openssl.bundle

qiita
qiita2
をみて、opensslをインストールし、PATHを通しましたが、ダメです。

原因は何がかんがえられるでしょうか？

Comments

[hoshi-takanori]

cocoapods を homebrew で入れたなら、cocoapods は homebrew が管理する ruby 環境を利用するはずなので、いったん rbenv を無効にしてお試しください。

[shutainer]

>hoshi-takanori様
ご回答ありがとうございます。
cocoapods自体はhomebrewで入れているわけでは無いのです。
ここを参考にしてインストールしています。
https://qiita.com/ShinokiRyosei/items/3090290cb72434852460https://qiita.com/ShinokiRyosei/items/3090290cb72434852460

[hoshi-takanori]

ってことは sudo gem install cocoapods したってことでしょうか？ (sudo gem install すると OS 領域に入りますが、OS 領域の ruby は OS のためのものなので、自分でいじらない方がいいという説が…。)

[shutainer]

>hoshi-takanori様
sudo gem install cocoapodssています。
原因はなにがかんがえられるのでしょうかね？

Answer 1

解決しました。
ruby のバージョンが古いせいでした。
rbenvで、ruby2.7.0にして、globalにしたらできました。