Add a JRuby-specific dependency for activerecord ~> 7.0 (closes #150).

* This is necessary since `activerecord-jdbc-adapter` currently requires
  `activerecord` ~> 7.1.0. Thus require `activerecord` ~> 7.0 for JRuby,
  otherwise require `activerecord` ~> 8.0 for CRuby/TruffleRuby.

Author: postmodern

README.md

@@ -170,6 +170,7 @@ Ronin::DB::Models.connect
 
 * [Ruby] >= 3.2.0
 * [activerecord] ~> 8.0
+  (or ~> 7.0 on JRuby)
 
 ## Install
 

gemspec.yml

@@ -21,9 +21,14 @@ metadata:
 
 required_ruby_version: ">= 3.2.0"
 
+ruby_dependencies:
+  activerecord: ~> 8.0
+
+jruby_dependencies:
+  activerecord: ~> 7.0
+
 dependencies:
   uri-query_params: ~> 0.6
-  activerecord: ~> 8.0
 
 development_dependencies:
   bundler: ~> 2.0

ronin-db-activerecord.gemspec

@@ -48,6 +48,22 @@ Gem::Specification.new do |gem|
 
   split = ->(string) { string.split(/,\s*/) }
 
+  if RUBY_PLATFORM =~ /java/
+    gem.platform = Gem::Platform.new("java")
+
+    if gemspec['jruby_dependencies']
+      gemspec['jruby_dependencies'].each do |name,versions|
+        gem.add_dependency(name,split[versions])
+      end
+    end
+  else
+    if gemspec['ruby_dependencies']
+      gemspec['ruby_dependencies'].each do |name,versions|
+        gem.add_dependency(name,split[versions])
+      end
+    end
+  end
+
   if gemspec['dependencies']
     gemspec['dependencies'].each do |name,versions|
       gem.add_dependency(name,split[versions])