Add clean error message when RAILS_ENV is unset (#15381)
By default, an unset RAILS_ENV is understood as RAILS_ENV=development. However, this is not what most people expect, and due to development-only dependencies, users are often left with confusing error messages. This commit changes it so that an explicit RAILS_ENV is required, and failing that, an error message is displayed before loading the app. Co-authored-by: Claire <claire.github-309c@sitedethib.com>
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unless ENV.key?('RAILS_ENV')
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STDERR.puts 'ERROR: Missing RAILS_ENV environment variable, please set it to "production", "development", or "test".'
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exit 1
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end
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ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
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require 'bundler/setup' # Set up gems listed in the Gemfile.
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