terminal.rb in rgversion-1.1.1

- old
+ new
@@ -1,24 +1,65 @@
 module Rgversion
   class Terminal
-    def initialize(argv = [])
-      raise NoArguments, 'No gems passed as arguments.' if argv.length.zero?
-      @argv = argv
+    def initialize(command, results)
+      @command = command
+      @results = results
     end
 
+    def report
+      render_errors
+      render_output
+    end
+
     def copy_to_clipboard
-      data = process_spider
-      unless data.empty?
-        output = data.join("\n")
-        `echo "#{output}" | pbcopy`
-        puts "#{output}\n\nCopied to your clipboard!"
+      return if @output.blank?
+      if command_exists?
+        `echo "#{@output}" | #{@command}`
+        puts "Copied to your clipboard!".green
+      else
+        render_instructions
       end
     end
 
     private
 
-    def process_spider
-      spider = Spider.new @argv
-      spider.output
+    def render_errors
+      return if @results[:errors].blank?
+      puts @results[:errors].join("\n").red
+      puts
+    end
+
+    def render_output
+      return if @results[:gems].blank?
+      @output = @results[:gems].join("\n")
+      puts "#{@output}"
+      puts
+    end
+
+    def command_exists?
+      return false if which(@command.to_s).nil?
+      true
+    end
+
+    # based on https://stackoverflow.com/a/5471032
+    # let's avoid find_executable from mkmf because in this case we need to supress logs
+    def which(cmd)
+      exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']
+      ENV['PATH'].split(File::PATH_SEPARATOR).each do |path|
+        exts.each do |ext|
+          exe = File.join(path, "#{cmd}#{ext}")
+          return exe if File.executable?(exe) && !File.directory?(exe)
+        end
+      end
+      nil
+    end
+
+    def render_instructions
+      if command.nil?
+        puts "Rgversion doesn't support copy to clipboard feature if your OS isn't macOS or Linux. You can manually copy output above."
+      else
+        puts "Unable to copy to clipboard because #{@command} is missed. Try the command below if you are on Ubuntu/Debian:"
+        puts "sudo apt-get install #{command}"
+      end
     end
   end
 end