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Asked: 2026-05-20T01:46:40+00:00

Without a file extension I can’t get syntax highlighting to persist. That’s not the

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Without a file extension I can’t get syntax highlighting to persist. That’s not the end of the world, but I’d appreciate having it.

Will it break Rails if I rename Gemfile as Gemfile.rb ?

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  1. Editorial Team

    It looks like you can rename it, but bundler will not automatically find it.

    However, you can just prepend every bundler command with BUNDLE_GEMFILE=Gemfile.rb and it’ll work:

    BUNDLE_GEMFILE=Gemfile.rb bundle install

    You might also look at http://gembundler.com/man/bundle-config.1.html — It mentions a gemfile option, but I couldn’t get it to work (even after manually setting it to Gemfile.rb, it still tried to look for Gemfile).

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