Support frozen strings

Author: npezza93

.github/workflows/ci.yml

@@ -21,3 +21,5 @@ jobs:
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
       - name: Run Tests
         run: bundle exec rake test
+        env:
+          RUBYOPT: ${{ startsWith(matrix.ruby, 'ruby-head') && '--enable=frozen-string-literal' || '' }}

lib/net/scp.rb

@@ -329,7 +329,12 @@ def download!(remote, local=nil, options={}, &progress)
       # (:verbose, :recursive, :preserve). Returns the command-line as a
       # string, ready to execute.
       def scp_command(mode, options)
-        command = "scp "
+        command =
+          if RUBY_VERSION < "2.3"
+            "scp "
+          else
+            +"scp "
+          end
         command << (mode == :upload ? "-t" : "-f")
         command << " -v" if options[:verbose]
         command << " -r" if options[:recursive]

net-scp.gemspec

@@ -35,15 +35,15 @@ Gem::Specification.new do |spec|
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
       spec.add_runtime_dependency(%q<net-ssh>, [">= 2.6.5", "< 8.0.0"])
       spec.add_development_dependency(%q<test-unit>, [">= 0"])
-      spec.add_development_dependency(%q<mocha>, [">= 0"])
+      spec.add_dependency(%q<mocha>, [">= 0", "<2.1"])
     else
       spec.add_dependency(%q<net-ssh>, [">= 2.6.5", "< 8.0.0"])
       spec.add_dependency(%q<test-unit>, [">= 0"])
-      spec.add_dependency(%q<mocha>, [">= 0"])
+      spec.add_dependency(%q<mocha>, [">= 0", "<2.1"])
     end
   else
     spec.add_dependency(%q<net-ssh>, [">= 2.6.5", "< 8.0.0"])
     spec.add_dependency(%q<test-unit>, [">= 0"])
-    spec.add_dependency(%q<mocha>, [">= 0"])
+    spec.add_dependency(%q<mocha>, [">= 0", "<2.1"])
   end
 end