Merge pull request #23 from nanaya/unsupported-message

Show more useful link for unsupported platform error

Author: flavorjones

README.md

@@ -33,7 +33,9 @@ gem install tailwindcss-ruby
 
 ### Using a local installation of `tailwindcss`
 
-If you are not able to use the vendored standalone executables (for example, if you're on an unsupported platform), you can use a local installation of the `tailwindcss` executable by setting an environment variable named `TAILWINDCSS_INSTALL_DIR` to the directory path containing the executable.
+<!-- note that this section's title is deeplinked from an error message, do not change -->
+
+If you are not able to use the vendored standalone executables (for example, if you're on an unsupported platform), you can use a [local installation](https://tailwindcss.com/docs/installation) of the `tailwindcss` executable by setting an environment variable named `TAILWINDCSS_INSTALL_DIR` to the directory path containing the executable.
 
 For example, if you've installed `tailwindcss` so that the executable is found at `/path/to/node_modules/bin/tailwindcss`, then you should set your environment variable like so:
 

lib/tailwindcss/ruby.rb

@@ -41,7 +41,8 @@ def executable(exe_path: DEFAULT_DIR)
           if Tailwindcss::Ruby::Upstream::NATIVE_PLATFORMS.keys.none? { |p| Gem::Platform.match_gem?(Gem::Platform.new(p), GEM_NAME) }
             raise UnsupportedPlatformException, <<~MESSAGE
               #{GEM_NAME} does not support the #{platform} platform
-              Please install tailwindcss following instructions at https://tailwindcss.com/docs/installation
+              See https://github.com/flavorjones/tailwindcss-ruby#using-a-local-installation-of-tailwindcss
+              for more details.
             MESSAGE
           end