Code-Hero: Ruby

Managing Ruby with Code-Hero

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Code-Hero simplifies the management of Ruby environments by utilizing asdf, a versatile version management tool. This approach ensures your projects consistently use the correct Ruby version, reducing configuration mismatches.

By default, the latest Ruby version is pre-installed. To verify the active Ruby version on your system, you can run the following command:

ruby -v

Changing the default Ruby version

If your project requires a specific Ruby version, you can configure it by following these steps:

1. Update asdf plugins:

   asdf plugin update --all
   

2. List available Ruby versions:

   asdf list all ruby
   

3. Install the desired version:

   asdf install ruby <VERSION>
   

4. Set the active version:

   • Globally (sets the version for all directories):

     asdf global ruby <VERSION>
     

   • Locally (sets the version for the current directory only):

     asdf local ruby <VERSION>
     

     This command creates a .tool-versions file in your project directory to specify the Ruby version.

5. Verify the active Ruby version:

   ruby -v
   

Starting a Ruby on Rails server

To make a Ruby on Rails server externally accessible, use the -b 0.0.0.0 option when starting the server:

bin/rails server -b 0.0.0.0

The server will then be accessible using the following URL:

http://<XXXXXX>.stackhero-network.com:3000

Resolving the "Blocked Host" error

If you encounter an error message like the following:

Blocked host: <XXXXXX>.stackhero-network.com

To allow requests to <XXXXXX>.stackhero-network.com make sure it is a valid hostname (containing only numbers, letters, dashes, and dots), then add the following to your environment configuration:
[...]

You can resolve this by editing the config/environments/development.rb file in your Rails project and adding the following line, replacing <XXXXXX>.stackhero-network.com with your actual server hostname:

config.hosts << "<XXXXXX>.stackhero-network.com"

For instance:

Hosts configuration example

By following these steps, you can effectively manage Ruby versions and ensure smooth operation of Ruby on Rails applications within the Code-Hero environment.