master エラーが発生した場合の解決方法

公開日: 2023/06/24

ブランチの名前が変わった事が原因。
memo.

## 症状

`brew update` したら、こんなエラーが発生。

“`
% brew update
fatal: couldn’t find remote ref refs/heads/master
Error: Fetching /usr/local/Homebrew/Library/Taps/dart-lang/homebrew-dart failed!
Error: Some taps failed to update!
The following taps can not read their remote branches:
dart-lang/dart
This is happening because the remote branch was renamed or deleted.
Reset taps to point to the correct remote branches by running `brew tap –repair`
“`

ブランチ名が master から　main に変わったことで発生するやつ。

## 対応

とりあえずローカルを書き換えておく。

“`
% cd /usr/local/Homebrew/Library/Taps/dart-lang/homebrew-dart
% git branch -m master main
% git remote remove origin
% git remote add origin https://github.com/dart-lang/homebrew-dart
“`

`brew tap –repair` も念のため実行しておく。

“`
% brew tap –repair dart-lang/dart
remote: Enumerating objects: 567, done.
remote: Counting objects: 100% (567/567), done.
remote: Compressing objects: 100% (178/178), done.
remote: Total 550 (delta 427), reused 492 (delta 371), pack-reused 0
Receiving objects: 100% (550/550), 97.39 KiB | 5.41 MiB/s, done.
Resolving deltas: 100% (427/427), completed with 11 local objects.
From https://github.com/dart-lang/homebrew-dart
* [new branch] deps -> origin/deps
* [new branch] main -> origin/main
* [new branch] pub-dependabot -> origin/pub-dependabot
* [new branch] sortie-pull-request -> origin/sortie-pull-request
* [new branch] update-homebrew -> origin/update-homebrew
==> dart-lang/dart: changed default branch name from master to main!
“`

これで `brew update` が通るようになる。

## 参考

> [dart \- fatal: couldn’t find remote ref refs/heads/master \- Stack Overflow](https://stackoverflow.com/questions/75509911/fatal-couldnt-find-remote-ref-refs-heads-master)