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How do I enable the Ruby 2.3 `--enable-frozen-string-literal` globally in Rails?

Tags:

ruby-on-rails-4

ruby-2.3

I am building a greenfield Rails application on top of Ruby 2.3, and I would like all Rails commands (e.g. rails s, rails c) and all Ruby commands (e.g. rake do:something) to use the new immutable-String functionality introduced in Ruby 2.3. (See, e.g. https://wyeworks.com/blog/2015/12/1/immutable-strings-in-ruby-2-dot-3/)

So, how do I pass that lovely --enable-frozen-string-literal Ruby option down to Ruby in all possible contexts where some command I issue bottoms out in Ruby?

Thanks in advance!

like image 298
aec Avatar asked Jan 23 '16 02:01

aec

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1 Answers

As far as I know, best way to do it is setting environment variable like followings:

export RUBYOPT=--enable-frozen-string-literal

or

setenv RUBYOPT --enable-frozen-string-literal

However, don't try it right now. It simply doesn't work because some codes in Bundler gem are attempting to modify frozen String. Wait until they fix the problem.

like image 78
Sa-ryong Kang Avatar answered Sep 18 '22 14:09

Sa-ryong Kang
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