nits: Move generate_ldflags Util

Author: sue445

_gem/lib/go_gem/rake_task.rb

@@ -99,7 +99,7 @@ def initialize(gem_name)
     #
     # @return [Hash<String, String>]
     def self.build_env_vars
-      ldflags = generate_ldflags
+      ldflags = GoGem::Util.generate_ldflags
       cflags = generate_cflags
 
       # FIXME: Workaround for Ubuntu (GitHub Actions)
@@ -129,21 +129,6 @@ def self.generate_goflags
     end
     private_class_method :generate_goflags
 
-    # @return [String]
-    def self.generate_ldflags
-      ldflags = "-L#{RbConfig::CONFIG["libdir"]} -l#{RbConfig::CONFIG["RUBY_SO_NAME"]}"
-
-      case `#{RbConfig::CONFIG["CC"]} --version` # rubocop:disable Lint/LiteralAsCondition
-      when /Free Software Foundation/
-        ldflags << " -Wl,--unresolved-symbols=ignore-all"
-      when /clang/
-        ldflags << " -undefined dynamic_lookup"
-      end
-
-      ldflags
-    end
-    private_class_method :generate_ldflags
-
     # @return [String]
     def self.generate_cflags
       [

_gem/lib/go_gem/util.rb

@@ -14,5 +14,19 @@ module Util
     def self.ruby_minor_version_build_tag(ruby_version = RUBY_VERSION)
       "ruby_#{ruby_version.to_f.to_s.gsub(".", "_")}"
     end
+
+    # @return [String]
+    def self.generate_ldflags
+      ldflags = "-L#{RbConfig::CONFIG["libdir"]} -l#{RbConfig::CONFIG["RUBY_SO_NAME"]}"
+
+      case `#{RbConfig::CONFIG["CC"]} --version` # rubocop:disable Lint/LiteralAsCondition
+      when /Free Software Foundation/
+        ldflags << " -Wl,--unresolved-symbols=ignore-all"
+      when /clang/
+        ldflags << " -undefined dynamic_lookup"
+      end
+
+      ldflags
+    end
   end
 end

_gem/sig/go_gem/rake_task.rbs

@@ -32,8 +32,6 @@ module GoGem
 
     def self.generate_goflags: () -> String
 
-    def self.generate_ldflags: () -> String
-
     def self.generate_cflags: () -> String
 
     private

_gem/sig/go_gem/util.rbs

@@ -1,5 +1,7 @@
 module GoGem
   module Util
     def self.ruby_minor_version_build_tag: (?String ruby_version) -> String
+
+    def self.generate_ldflags: () -> String
   end
 end