[M1 Mac] Herokuへのpushで失敗する場合の対処法

M1 MacでRailsのプログラムをHerokuにpushしようとしたらYour bundle only supports platforms [“arm64-darwin-20”] but your local platformというエラーが出たので対処法を紹介します。

エラー内容

エラー内容は以下の通り、プラットフォームの互換性の問題のようです。M1 Mac特有ですね。

remote: Building source:
remote: 
remote: -----> Building on the Heroku-20 stack
remote: -----> Determining which buildpack to use for this app
remote: ! Warning: Multiple default buildpacks reported the ability to handle this app. The first buildpack in the list below will be used.
remote: Detected buildpacks: Ruby,Node.js
remote: See https://devcenter.heroku.com/articles/buildpacks#buildpack-detect-order
remote: -----> Ruby app detected
remote: -----> Installing bundler 2.2.33
remote: -----> Removing BUNDLED WITH version in the Gemfile.lock
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-3.0.0
remote: -----> Installing dependencies using bundler 2.2.33
remote: Running: BUNDLE_WITHOUT='development:test' BUNDLE_PATH=vendor/bundle BUNDLE_BIN=vendor/bundle/bin BUNDLE_DEPLOYMENT=1 bundle install -j4
remote: Your bundle only supports platforms ["arm64-darwin-20"] but your local platform
remote: is x86_64-linux. Add the current platform to the lockfile with bundle lock remote: --add-platform x86_64-linux and try again.
remote: Bundler Output: Your bundle only supports platforms ["arm64-darwin-20"] but your local platform
remote: is x86_64-linux. Add the current platform to the lockfile with bundle lock remote: --add-platform x86_64-linux and try again.
remote:
remote: !
remote: ! Failed to install gems via Bundler.
remote: !
remote: ! Push rejected, failed to compile Ruby app.
remote:
remote: ! Push failed

対処法

エラーの文面にも書かれていますが、下記コマンドを実行してHerokuの実行環境を追加すると上手くpushできるようになります。

bundle lock　--add-platform x86_64-linux

Gemfile.clockのplatformには、M1の実行環境に加えてHerokuの実行環境も追加されていることが分かります。

PLATFORMS
  arm64-darwin-20
  x86_64-linux

pushの前にcommitも忘れずに。

git add .
git commit -m 'Add platform'

Herokuにpushします。

git push heroku master