rails6 herokuへのデプロイ設定

前提・実現したいこと

初学者です。
初めてアプリを作成しています。
herokuへデプロイしたいのですがエラーが多発して困っています。
出来ればご回答よろしくお願いします。

発生している問題・エラーメッセージ

Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
remote: Compressing source files... done.
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 2.2.21
remote: -----> Removing BUNDLED WITH version in the Gemfile.lock
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-3.0.2
remote: -----> Installing dependencies using bundler 2.2.21
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 ["x86_64-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 ["x86_64-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
remote: !
remote: ! ## Warning - The same version of this code has already been built: e1ef2fb1bbd91133e48bfca4d8d31668a381a842
remote: !
remote: ! We have detected that you have triggered a build from source code with version e1ef2fb1bbd91133e48bfca4d8d31668a381a842
remote: ! at least twice. One common cause of this behavior is attempting to deploy code from a different branch.
remote: !
remote: ! If you are developing on a branch and deploying via git you must run
remote: !
remote: ! git push heroku <branchname>:main
remote: !
remote: ! This article goes into details on the behavior:
remote: ! https://devcenter.heroku.com/articles/duplicate-build-version
remote:
remote: Verifying deploy...
remote:
remote: ! Push rejected to アプリ名前.
remote:
To https://git.heroku.com/アプリ名前.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/アプリ名前.git'

エラーメッセージ
Failed to install gems via Bundler.

! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/アプリ名前.git'

該当のソースコード

### Gemfile
コード

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '3.0.2'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
gem 'rails', '~> 6.1.4'
# Use sqlite3 as the database for Active Record
#gem 'sqlite3', '~> 1.4'
# Use Puma as the app server
gem 'puma', '~> 5.0'
# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 5.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Active Storage variant
# gem 'image_processing', '~> 1.2'

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.4', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem 'sqlite3', '~> 1.4'
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 4.1.0'
  # Display performance information such as SQL time and flame graphs for each request in your browser.
  # Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
  gem 'rack-mini-profiler', '~> 2.0'
  gem 'listen', '~> 3.3'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 3.26'
  gem 'selenium-webdriver'
  # Easy installation and use of web drivers to run system tests with browsers
  gem 'webdrivers'
end

group :production do
  gem 'pg', '1.2.3'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]



Gemfile.look

BUNDLED WITH
   2.2.21

試したこと

https://qiita.com/m6mmsf/items/fb8a8672df98bdb59c9c
こちらの記事とほぼ同じ内容だったので、ターミナルで実行してみて、bundleのバージョンを変更してみてプッシュしましたが、同じエラーが出ました。

補足情報（FW/ツールのバージョンなど）

記事を見てみたら、「herokuのbundlerとローカルでのbundlerのバージョンに相違がある」ことらしいのでバージョンを記載します。
Bundler version 2.2.21
heroku/7.56.1 darwin-x64 node-v16.6.1

行動規範の内容に同意します

回答1件

ベストアンサー

この↓エラー(warning)が問題のように見えます。

remote: ! ## Warning - The same version of this code has already been built: e1ef2fb1bbd91133e48bfca4d8d31668a381a842

つまり、そもそもgitで全く同じcommit番号のものがすでにherokuにdeployされているのではないでしょうか。
ローカルで変更したものの、commitしていない場合に同じような問題とエラーに遭遇したことが私もあります。もうすでにdeployされている以上、そのまま重ねてdeployすることは、herokuではできなかったと思います。

herokuへのdeployはgitのmaster branchをお使いのようですから、例えばterminalから、以下のgitコマンドなどで確認するとよいでしょう。

bash
1git switch master
2git status  # => 正常ならば nothing to commit などと出るはず(英語環境でのメッセージ)
3git log -n 10 --graph --decorate --pretty=oneline --abbrev-commit
4  # => master と heroku/master とが一致していれば、すでにdeployされていることを意味する