brew doctorでWarningが出たので解決方法まとめました。(for Mac)

# 環境
Macbook pro(2017年モデル)
macOS Mojave
# 状況
Homebrewを使って、rbenvをインストールしようと試みたところエラーが発生し、

```:terminal
$ brew doctor
```

で確認したところ、以下のようなWarningが出現したので、その解決方法を備忘録として残しておきます。

```
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
  /usr/local/lib/libgvplugin_core.6.dylib
  /usr/local/lib/libgvplugin_dot_layout.6.dylib
  /usr/local/lib/libgvplugin_gd.6.dylib
  /usr/local/lib/libgvplugin_neato_layout.6.dylib
  /usr/local/lib/libgvplugin_quartz.6.dylib

Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected header files:
  /usr/local/include/arith.h
  /usr/local/include/binary_log_types.h
  /usr/local/include/cdt.h
  /usr/local/include/cgraph.h
  /usr/local/include/color.h
  /usr/local/include/decode.h
  /usr/local/include/demux.h
  /usr/local/include/encode.h
  /usr/local/include/errmsg.h
  /usr/local/include/fcfreetype.h
  /usr/local/include/fcprivate.h
  /usr/local/include/fontconfig.h
  /usr/local/include/freetype/config/ftconfig.h
  /usr/local/include/freetype/config/ftheader.h
  /usr/local/include/freetype/config/ftmodule.h
  /usr/local/include/freetype/config/ftoption.h
  /usr/local/include/freetype/config/ftstdlib.h
  /usr/local/include/freetype/freetype.h
  /usr/local/include/freetype/ftadvanc.h
  /usr/local/include/freetype/ftbbox.h
  /usr/local/include/freetype/ftbdf.h
  /usr/local/include/freetype/ftbitmap.h
  /usr/local/include/freetype/ftbzip2.h
  /usr/local/include/freetype/ftcache.h
  /usr/local/include/freetype/ftchapters.h
  /usr/local/include/freetype/ftcid.h
  /usr/local/include/freetype/ftdriver.h
  /usr/local/include/freetype/fterrdef.h
  /usr/local/include/freetype/fterrors.h
  /usr/local/include/freetype/ftfntfmt.h
  /usr/local/include/freetype/ftgasp.h
  /usr/local/include/freetype/ftglyph.h
  /usr/local/include/freetype/ftgxval.h
  /usr/local/include/freetype/ftgzip.h
  /usr/local/include/freetype/ftimage.h
  /usr/local/include/freetype/ftincrem.h
  /usr/local/include/freetype/ftlcdfil.h
  /usr/local/include/freetype/ftlist.h
  /usr/local/include/freetype/ftlzw.h
  /usr/local/include/freetype/ftmac.h
  /usr/local/include/freetype/ftmm.h
  /usr/local/include/freetype/ftmodapi.h
  /usr/local/include/freetype/ftmoderr.h
  /usr/local/include/freetype/ftotval.h
  /usr/local/include/freetype/ftoutln.h
  /usr/local/include/freetype/ftparams.h
  /usr/local/include/freetype/ftpfr.h
  /usr/local/include/freetype/ftrender.h
  /usr/local/include/freetype/ftsizes.h
  /usr/local/include/freetype/ftsnames.h
  /usr/local/include/freetype/ftstroke.h
  /usr/local/include/freetype/ftsynth.h
  /usr/local/include/freetype/ftsystem.h
  /usr/local/include/freetype/fttrigon.h
  /usr/local/include/freetype/fttypes.h
  /usr/local/include/freetype/ftwinfnt.h
  /usr/local/include/freetype/t1tables.h
  /usr/local/include/freetype/ttnameid.h
  /usr/local/include/freetype/tttables.h
  /usr/local/include/freetype/tttags.h
  /usr/local/include/ft2build.h
  /usr/local/include/geom.h
  /usr/local/include/graphviz_version.h
  /usr/local/include/gvc.h
  /usr/local/include/gvcext.h
  /usr/local/include/gvcjob.h
  /usr/local/include/gvcommon.h
  /usr/local/include/gvconfig.h
  /usr/local/include/gvplugin.h
  /usr/local/include/gvplugin_device.h
  /usr/local/include/gvplugin_layout.h
  /usr/local/include/gvplugin_loadimage.h
  /usr/local/include/gvplugin_render.h
  /usr/local/include/gvplugin_textlayout.h
  /usr/local/include/gvpr.h
  /usr/local/include/lt_dlloader.h
  /usr/local/include/lt_error.h
  /usr/local/include/lt_system.h
  /usr/local/include/mux.h
  /usr/local/include/mux_types.h
  /usr/local/include/my_command.h
  /usr/local/include/my_list.h
  /usr/local/include/mysql.h
  /usr/local/include/mysql/client_plugin.h
  /usr/local/include/mysql/plugin_auth_common.h
  /usr/local/include/mysql/udf_registration_types.h
  /usr/local/include/mysql_com.h
  /usr/local/include/mysql_time.h
  /usr/local/include/mysql_version.h
  /usr/local/include/mysqld_error.h
  /usr/local/include/mysqlx_ername.h
  /usr/local/include/mysqlx_error.h
  /usr/local/include/mysqlx_version.h
  /usr/local/include/pack.h
  /usr/local/include/pathgeom.h
  /usr/local/include/pathplan.h
  /usr/local/include/png.h
  /usr/local/include/pngconf.h
  /usr/local/include/textspan.h
  /usr/local/include/types.h
  /usr/local/include/usershape.h
  /usr/local/include/xdot.h
```

#**解決法**
まずは上のWarningから。（下のWarningも解決方法同じでした！！）

```
Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
  /usr/local/lib/libgvplugin_core.6.dylib
  /usr/local/lib/libgvplugin_dot_layout.6.dylib
  /usr/local/lib/libgvplugin_gd.6.dylib
  /usr/local/lib/libgvplugin_neato_layout.6.dylib
  /usr/local/lib/libgvplugin_quartz.6.dylib
```

①ターミナルに以下を入力します。（ファイルの作成）

```:terminal
$ vim ~/.del_files.sh
```
②`〜`が並んだページが出現するので、１行目に`#!/bin/bash`を貼り付け、２行目以降に`Unexpected dylibs:`に記載されているファイルをコピペします。(以下、参考)

```:terminal
#!/bin/bash
  /usr/local/lib/libgvplugin_core.6.dylib
  /usr/local/lib/libgvplugin_dot_layout.6.dylib
  /usr/local/lib/libgvplugin_gd.6.dylib
  /usr/local/lib/libgvplugin_neato_layout.6.dylib
  /usr/local/lib/libgvplugin_quartz.6.dylib
```

③カーソルを一番上のファイル（２行目）の頭におき、`ctrl + v`で矩形選択のビジュアルモード（VISUAL BLOCK）に移行。`↓`カーソルで一番下のファイルの頭まで選択し、`:`を押します。

すると、下のラインに既に `:'<,'> `が入力された状態でコマンドラインが表示されるので、続けて `s/^/rm -f / `と入力します。（`rm` は、ファイルやディレクトリを削除してあげるコマンドで、 `-f` は、「削除しますか？」的なメッセージを都度出さないようにするオプションです。）

④`Enter`を押して、全ての行（一番上以外）の先頭に`s/^/rm -f / `が追加されているのを確認したら、もう一度`:`を押します。一番下の行に入力欄が出てくるので、`wq!`と入力し、`Enter`を押します。

⑤通常の入力モードに戻るので、そこで

```:terminal
$ bash ~/.del_files.sh
```
を実行。これでファイルが削除されます。

⑥以上が完了したら、

```:terminal
$ brew doctor
```
を実行し、エラー文が消えていたら、成功です。
###追記
⑦もし、以下のようなWarningが出現した場合

```
Warning: Broken symlinks were found. Remove them with `brew cleanup`:
  /usr/local/lib/libgvplugin_core.dylib
  /usr/local/lib/libgvplugin_dot_layout.dylib
  /usr/local/lib/libgvplugin_gd.dylib
  /usr/local/lib/libgvplugin_neato_layout.dylib
  /usr/local/lib/libgvplugin_quartz.dylib
```
エラー文に従って、

```:terminal
$ brew cleanup
```
してあげましょう。

---
こちらのWarningも上記と同じ方法で解決できます！！

```
Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected header files:
  /usr/local/include/arith.h
  /usr/local/include/binary_log_types.h
  /usr/local/include/cdt.h
  /usr/local/include/cgraph.h
  /usr/local/include/color.h
  /usr/local/include/decode.h
  /usr/local/include/demux.h
  /usr/local/include/encode.h
  /usr/local/include/errmsg.h
  /usr/local/include/fcfreetype.h
  /usr/local/include/fcprivate.h
  /usr/local/include/fontconfig.h
  /usr/local/include/freetype/config/ftconfig.h
  /usr/local/include/freetype/config/ftheader.h
  /usr/local/include/freetype/config/ftmodule.h
  /usr/local/include/freetype/config/ftoption.h
  /usr/local/include/freetype/config/ftstdlib.h
  /usr/local/include/freetype/freetype.h
  /usr/local/include/freetype/ftadvanc.h
  /usr/local/include/freetype/ftbbox.h
  /usr/local/include/freetype/ftbdf.h
  /usr/local/include/freetype/ftbitmap.h
  /usr/local/include/freetype/ftbzip2.h
  /usr/local/include/freetype/ftcache.h
  /usr/local/include/freetype/ftchapters.h
  /usr/local/include/freetype/ftcid.h
  /usr/local/include/freetype/ftdriver.h
  /usr/local/include/freetype/fterrdef.h
  /usr/local/include/freetype/fterrors.h
  /usr/local/include/freetype/ftfntfmt.h
  /usr/local/include/freetype/ftgasp.h
  /usr/local/include/freetype/ftglyph.h
  /usr/local/include/freetype/ftgxval.h
  /usr/local/include/freetype/ftgzip.h
  /usr/local/include/freetype/ftimage.h
  /usr/local/include/freetype/ftincrem.h
  /usr/local/include/freetype/ftlcdfil.h
  /usr/local/include/freetype/ftlist.h
  /usr/local/include/freetype/ftlzw.h
  /usr/local/include/freetype/ftmac.h
  /usr/local/include/freetype/ftmm.h
  /usr/local/include/freetype/ftmodapi.h
  /usr/local/include/freetype/ftmoderr.h
  /usr/local/include/freetype/ftotval.h
  /usr/local/include/freetype/ftoutln.h
  /usr/local/include/freetype/ftparams.h
  /usr/local/include/freetype/ftpfr.h
  /usr/local/include/freetype/ftrender.h
  /usr/local/include/freetype/ftsizes.h
  /usr/local/include/freetype/ftsnames.h
  /usr/local/include/freetype/ftstroke.h
  /usr/local/include/freetype/ftsynth.h
  /usr/local/include/freetype/ftsystem.h
  /usr/local/include/freetype/fttrigon.h
  /usr/local/include/freetype/fttypes.h
  /usr/local/include/freetype/ftwinfnt.h
  /usr/local/include/freetype/t1tables.h
  /usr/local/include/freetype/ttnameid.h
  /usr/local/include/freetype/tttables.h
  /usr/local/include/freetype/tttags.h
  /usr/local/include/ft2build.h
  /usr/local/include/geom.h
  /usr/local/include/graphviz_version.h
  /usr/local/include/gvc.h
  /usr/local/include/gvcext.h
  /usr/local/include/gvcjob.h
  /usr/local/include/gvcommon.h
  /usr/local/include/gvconfig.h
  /usr/local/include/gvplugin.h
  /usr/local/include/gvplugin_device.h
  /usr/local/include/gvplugin_layout.h
  /usr/local/include/gvplugin_loadimage.h
  /usr/local/include/gvplugin_render.h
  /usr/local/include/gvplugin_textlayout.h
  /usr/local/include/gvpr.h
  /usr/local/include/lt_dlloader.h
  /usr/local/include/lt_error.h
  /usr/local/include/lt_system.h
  /usr/local/include/mux.h
  /usr/local/include/mux_types.h
  /usr/local/include/my_command.h
  /usr/local/include/my_list.h
  /usr/local/include/mysql.h
  /usr/local/include/mysql/client_plugin.h
  /usr/local/include/mysql/plugin_auth_common.h
  /usr/local/include/mysql/udf_registration_types.h
  /usr/local/include/mysql_com.h
  /usr/local/include/mysql_time.h
  /usr/local/include/mysql_version.h
  /usr/local/include/mysqld_error.h
  /usr/local/include/mysqlx_ername.h
  /usr/local/include/mysqlx_error.h
  /usr/local/include/mysqlx_version.h
  /usr/local/include/pack.h
  /usr/local/include/pathgeom.h
  /usr/local/include/pathplan.h
  /usr/local/include/png.h
  /usr/local/include/pngconf.h
  /usr/local/include/textspan.h
  /usr/local/include/types.h
  /usr/local/include/usershape.h
  /usr/local/include/xdot.h
```




#参考URL
[brew doctorでのWarningを解決してみた(for Mac)](https://qiita.com/FrogWoman/items/7c0fdaa7550dc5895a33)
[HowTo: Save File in Vi / Vim Text Editor](https://www.cyberciti.biz/faq/save-file-in-vi-vim-linux-apple-macos-unix-bsd/)
[server - E45 readonly option is set (add ! to override) - Ask Ubuntu](https://askubuntu.com/questions/635779/e45-readonly-option-is-set-add-to-override)