rails assets:precompile gives error: tailwindcss-rails does not support the x86_64-linux platform

[deflexor]

Dockerfile:

FROM ruby:3.1.2-alpine
WORKDIR /app
COPY . .
RUN apk add --update --no-cache build-base gcc g++ git less tzdata \
  libstdc++ libffi-dev libc-dev sqlite-dev postgresql-dev build-base gcompat
RUN gem install bundler
RUN bundle lock --add-platform x86_64-linux
RUN bundle --verbose
ENV RAILS_ENV=production
RUN bundle exec rails assets:clean assets:precompile
EXPOSE 3000
CMD ["rails", "server", "-b", "0.0.0.0"]

Results in error:

Tailwindcss::Commands::UnsupportedPlatformException: tailwindcss-rails does not support the x86_64-linux platform

[flavorjones]

Hi, sorry you're having a problem, I'll try to help.

This gem absolutely supports alpine, so we'll need more information about your Rails app to diagnose what's going on. Can you please share the output of bundle env in this container on your rails application?

[gucki]

@flavorjones I just hit the same issue with a new (minimal) rails 7.0.4 application. It seems it only occurs when using rubygems 3.3.22. It does not occur when using rubygems 3.3.7 (but this version causes rubygems/rubygems#5351). In all cases using ruby:3.1-alpine as base image.

[flavorjones]

@gucki I think you're describing rubygems/rubygems#5914? But I'm only guessing because I don't know what command you're running (gem or bundle) or other info about your system

@deflexor Can you please share the output of bundle env in this container on your rails application?

[deflexor]

Hello, here it is.

Environment

Bundler       2.3.22
  Platforms   ruby, x86_64-linux-musl
Ruby          3.1.2p20 (2022-04-12 revision 4491bb740a9506d76391ac44bb2fe6e483fec952) [x86_64-linux-musl]
  Full Path   /usr/local/bin/ruby
  Config Dir  /usr/local/etc
RubyGems      3.3.7
  Gem Home    /usr/local/bundle
  Gem Path    /root/.local/share/gem/ruby/3.1.0:/usr/local/lib/ruby/gems/3.1.0:/usr/local/bundle
  User Home   /root
  User Path   /root/.local/share/gem/ruby/3.1.0
  Bin Dir     /usr/local/bundle/bin
Tools         
  Git         not installed
  RVM         not installed
  rbenv       not installed
  chruby      not installed

[gucki]

@flavorjones No, when I have rubygems 3.3.22 installed and run bin/dev I get "Tailwindcss::Commands::UnsupportedPlatformException: tailwindcss-rails does not support the x86_64-linux platform". When I downgrade to rubygems 3.3.7 bin/dev works without any issues (I'm not reinstalling any gems manually, just up/ downgrading rubygems itself). But please note that the different rubygems versions also include a different version of bundler (2.3.7 vs 2.3.22). Actually, according to the env of @deflexor, the bundler version seems to be the issue. @deflexor Please try to use bundler 2.3.7, I suspect it works then.

[flavorjones]

I see ... just to confirm, the native gem is installing fine but you're getting this error from the tailwindcss wrapper. Interesting. I'll dig in a bit more.

[flavorjones]

OK, reproduced at https://github.com/rails/tailwindcss-rails/actions/runs/3084115065/jobs/4985885770

[flavorjones]

OK, I've identified the problem upstream in rubygems, and bug has been filed here: rubygems/rubygems#5938

[flavorjones]

Release v2.0.14 / 2022-09-19 · rails/tailwindcss-rails has been released which works around this bug.

[gucki]

@flavorjones Thank you! I can confirm it fixed the issue for me.