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"You must use Bundler 2 or greater with this lockfile" に対応する

Last updated at Posted at 2019-03-24

2019年1月4日に bundler の 2.X 系がリリースされた.2.X 系の bundler がインストールされている状態で bundle update などすると Gemfile.lock の BUNDLED WITH が書き換わる.

$ bundle update
•••

$ git diff
•••
 BUNDLED WITH
-   1.17.3
+   2.0.1

bundler 2.X 系で作成された Gemfile.lock ファイルが CircleCI 上で bundle install できないなどが発生する件に対応する.

You must use Bundler 2 or greater with this lockfile.
image.png

1. ダウングレードするパターン

現在のバージョンをチェック

$ cat Gemfile.lock | grep "BUNDLED WITH" -A 1
BUNDLED WITH
2.0.1

旧バージョンで Gemfile.lock を生成しなおす

$ gem install bundler -v 1.17.3
$ rm Gemfile.lock
$ bundle _1.17.3_ install

更新チェック

$ cat Gemfile.lock | grep "BUNDLED WITH" -A 1
BUNDLED WITH
1.17.3

2. CircleCI 上などで 2.X 系を使えるようにするパターン

  • BUNDLER_VERSION で任意のバージョンを指定
  • ② bundler を入れ直す
.circleci/config.yml
version: 2
jobs:
  build:
    docker:
      # specify the version you desire here
      - image: circleci/ruby:2.6.0-node-browsers
        environment:
          # ①
          BUNDLER_VERSION: 2.0.1

      # Specify service dependencies here if necessary
      # CircleCI maintains a library of pre-built images
      # documented at https://circleci.com/docs/2.0/circleci-images/
      # - image: circleci/postgres:9.4

    working_directory: ~/repo

    steps:
      - checkout

      # ②
      - run:
          name: setup bundler
          command: |
            sudo gem update --system
            sudo gem uninstall bundler
            sudo rm /usr/local/bin/bundle
            sudo rm /usr/local/bin/bundler
            sudo gem install bundler

      # •••

      - run:
          name: install dependencies
          command: |
            bundle install --jobs=4 --retry=3 --path vendor/bundle

参考

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