はじめに

特にライブラリを追加・削除したわけではないのに、
pod install　をしたら「No such file or directory」というエラーが出てしまいました。
対処法を調べるまで少し時間がかかってしまったので、記録用に残しておきます。

エラー

pod install を行ったら、下記のようなエラーが出てしまいました。

$ pod install
-bash: /usr/local/bin/pod: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby: bad interpreter: No such file or directory

原因

MacOSをHigh Sierraに変更したことが原因らしい。
どうやらOSのメジャーバージョンアップ時には同様のエラーになることが多いようです。
この場合は、gemを使ってcocoapodsを最新化してあげればOK。

$ sudo gem install -n /usr/local/bin cocoapods
Fetching: nap-1.1.0.gem (100%)
Successfully installed nap-1.1.0
Fetching: fuzzy_match-2.0.4.gem (100%)
Successfully installed fuzzy_match-2.0.4
Fetching: cocoapods-core-1.5.3.gem (100%)
Successfully installed cocoapods-core-1.5.3
Fetching: cocoapods-deintegrate-1.0.2.gem (100%)
Successfully installed cocoapods-deintegrate-1.0.2
Fetching: cocoapods-downloader-1.2.1.gem (100%)
Successfully installed cocoapods-downloader-1.2.1
Fetching: cocoapods-plugins-1.0.0.gem (100%)
Successfully installed cocoapods-plugins-1.0.0
Fetching: cocoapods-search-1.0.0.gem (100%)
Successfully installed cocoapods-search-1.0.0
Fetching: cocoapods-stats-1.0.0.gem (100%)
Successfully installed cocoapods-stats-1.0.0
Fetching: netrc-0.11.0.gem (100%)
Successfully installed netrc-0.11.0
Fetching: cocoapods-trunk-1.3.0.gem (100%)
Successfully installed cocoapods-trunk-1.3.0
Fetching: cocoapods-try-1.1.0.gem (100%)
Successfully installed cocoapods-try-1.1.0
Fetching: molinillo-0.6.5.gem (100%)
Successfully installed molinillo-0.6.5
Fetching: escape-0.0.4.gem (100%)
Successfully installed escape-0.0.4
Fetching: fourflusher-2.0.1.gem (100%)
Successfully installed fourflusher-2.0.1
Fetching: ruby-macho-1.2.0.gem (100%)
Successfully installed ruby-macho-1.2.0
Fetching: cocoapods-1.5.3.gem (100%)
Successfully installed cocoapods-1.5.3
Parsing documentation for nap-1.1.0
Installing ri documentation for nap-1.1.0
Parsing documentation for fuzzy_match-2.0.4
Installing ri documentation for fuzzy_match-2.0.4
Parsing documentation for cocoapods-core-1.5.3
Installing ri documentation for cocoapods-core-1.5.3
Parsing documentation for cocoapods-deintegrate-1.0.2
Installing ri documentation for cocoapods-deintegrate-1.0.2
Parsing documentation for cocoapods-downloader-1.2.1
Installing ri documentation for cocoapods-downloader-1.2.1
Parsing documentation for cocoapods-plugins-1.0.0
Installing ri documentation for cocoapods-plugins-1.0.0
Parsing documentation for cocoapods-search-1.0.0
Installing ri documentation for cocoapods-search-1.0.0
Parsing documentation for cocoapods-stats-1.0.0
Installing ri documentation for cocoapods-stats-1.0.0
Parsing documentation for netrc-0.11.0
Installing ri documentation for netrc-0.11.0
Parsing documentation for cocoapods-trunk-1.3.0
Installing ri documentation for cocoapods-trunk-1.3.0
Parsing documentation for cocoapods-try-1.1.0
Installing ri documentation for cocoapods-try-1.1.0
Parsing documentation for molinillo-0.6.5
Installing ri documentation for molinillo-0.6.5
Parsing documentation for escape-0.0.4
Installing ri documentation for escape-0.0.4
Parsing documentation for fourflusher-2.0.1
Installing ri documentation for fourflusher-2.0.1
Parsing documentation for ruby-macho-1.2.0
Installing ri documentation for ruby-macho-1.2.0
Parsing documentation for cocoapods-1.5.3
Installing ri documentation for cocoapods-1.5.3
Done installing documentation for nap, fuzzy_match, cocoapods-core, cocoapods-deintegrate, cocoapods-downloader, cocoapods-plugins, cocoapods-search, cocoapods-stats, netrc, cocoapods-trunk, cocoapods-try, molinillo, escape, fourflusher, ruby-macho, cocoapods after 10 seconds
16 gems installed

完了。
すると…

$ pod install
Analyzing dependencies
Downloading dependencies
Using Crashlytics (3.10.1)
Using Fabric (1.7.5)
Installing LicensePlist (1.8.3)
Using OneSignal (2.6.2)
Generating Pods project
Integrating client project
Sending stats
Pod installation complete! There are 4 dependencies from the Podfile and 4 total pods installed.

無事pod install できました。

おわりに

High Sierraへアップデートしたのはそこまで最近ではないつもりだったので、
すっかり忘れていました…。
OSバージョンアップでOS側の仕様が変わって、
CocoaPodsも再インストールというのは感覚的になんとなく納得感はありますが、
もう少し親切なエラーになってくれたらな…と思いました。