"The dependency tzinfo-data will be unused" on Ubuntu about tzinfo-data

[philr]

The warning message is coming from Bundler (rubygems/bundler#5003). It is not an error and can be ignored.

When you create a new Ruby on Rails application, a Gemfile is created including the following line that triggers the message:

gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

The purpose of this line is to include the tzinfo-data gem in the bundle on Windows to act as a source of time zone data. This gem is unnecessary on Ubuntu (and Unix-based systems in general) because the system includes time zone data that can be read directly by tzinfo.

If you want to get rid of the warning message you can do one of the following:

1. Remove the platforms option from the gem 'tzinfo-data' line in the Gemfile (and run bundle update). This will cause tzinfo to use tzinfo-data as its data source on all platforms instead of using the system time zone data.
2. Remove the gem 'tzinfo-data' line from the Gemfile. This will cause tzinfo to always try and use the system time zone data. A TZInfo::DataSourceNotFound exception will be raised if you try and run your app on Windows.
3. Run bundle lock --add-platform mingw, mswin, x64_mingw, jruby to add mingw, mswin, x64_mingw, and jruby to the list of platforms Bundler will include in the bundle.
4. Run bundle config --local disable_platform_warnings true to silence the warnings (requires bundler >= 1.17.0). Thanks for @mxhold for this suggestion.

Each of these options would need to be carried out for each Rails application you create.

You can also run bundle config disable_platform_warnings true to disable the warning messages for the current user.

[philr]

@cronwel I'm the author of tzinfo and tzinfo-data, so that's why I know how they can be used. The Gemfile syntax and bundler command are documented on the Bundler documentation site.

[mxhold]

Just adding that an additional way to silence this warning is by enabling the disable_platform_warnings option for Bundler (available in versions >=1.17.0) by running:

bundle config --local disable_platform_warnings true

This will silence any platform warnings in the context of the current app. If you leave off the --local option, the warnings will be silenced globally for the current machine.

[cronwel]

Thank you philr, I was wondering( and I am a new to programming) how did you learn that? I see lots off folks know great things (like you in this post), but how did you acquire that knowledge? I hope to learn how to learn when it comes to programming. Any advice would be greatly appreciated.

[terracotta210]

It's good to know that this is not an error, thanks for help.

[lifesucx]

I read philir's answer, and thank you. It is nice to know that it is not an error message, but I am no longer able to (I am sorry if this is worded badly) program in the terminal anymore. My username and the '$' and the name of the directory I am in do not show up. I can type in the line and hit enter, but it is more like I am writing a paper now. No program is executing. I have tried exiting and reopening the terminal and running the program again, but it is always the same output.

update

I closed and reopened the terminal. This time I did not get the notification at the end when the program executed, but I still am having the typing issue.

[wanseanpark]

I have the pros too, I dont know how to fix it . so sad ...