composerでpatchをあてようとすると失敗する件の解決方法

はじめに

cweagans/composer-patchesを使って依存関係にパッチを当てるとき、何故かMacOSだと失敗してしまいます。 数十秒フリーズしたのち、エラーが流れます。

composer i
....

  - Applying patches for composer/ca-bundle
    patches/cloudflare-ca.patch (0)

  - Applying patches for hoa/exception
    patches/Idle.patch (0)

  - Applying patches for hoa/consistency
    patches/Consistency.patch (0)

  - Applying patches for hoa/protocol
    patches/Node.patch (0)
   Could not apply patch! Skipping. The error was: The process "patch '-p1' --no-backup-if-mismatch -d '/Users/xxxx/src/github.com/malsuke/phpstan-src/vendor/hoa/protocol' < '/Users/xxxx/src/github.com/malsuke/phpstan-src/patches/Node.patch'" exceeded the timeout of 300 seconds.

In Patches.php line 331:
                                              
  Cannot apply patch 0 (patches/Node.patch)!  

理由

これはMacOSに搭載されているpatchコマンドがBSD系統のものであるからです。

composer-patchesはGNU系統のpatchコマンドを基本として作られている(?)ようなので、通常のMacOSで実行するとオプション周りが合わないために失敗します。

解決方法

GNU系統のpatchコマンドでデフォルトで入っているpatchコマンドを上書きします。

# brewでgpatchをインストール
brew install gpatch

# シンボリックリンクを貼って置き換える
sudo ln -sf $(which gpatch) /usr/local/bin/patch

再度composer iを実行すると、うまくいきました

$ composer i 
Gathering patches for root package.
Installing dependencies from lock file (including require-dev)
Verifying lock file contents can be installed on current platform.
Nothing to install, update or remove
Package hoa/compiler is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/consistency is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/event is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/exception is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/file is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/iterator is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/math is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/protocol is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/regex is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/stream is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/ustring is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/visitor is abandoned, you should avoid using it. No replacement was suggested.
Package hoa/zformat is abandoned, you should avoid using it. No replacement was suggested.
Generating autoload files
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