Replace nvm with nodebrew dependency

packages/heroku.rb

@@ -7,23 +7,18 @@ class Heroku < Package
   source_url 'https://github.com/heroku/cli/archive/v6.13.6.tar.gz'
   source_sha256 '395c7e22d16b1fce2d5ed4ac1e022dbd3c9aa8fdbc172d9dadf86ba9c1ad6978'
 
-  depends_on 'nvm'
+  depends_on 'nodebrew' unless `node --version`
   depends_on 'yarn'
 
   def self.build
-    system '\. ~/.bashrc && nvm install stable && yarn install'
+    system 'nodebrew install-binary latest && nodebrew use latest' unless `node --version`
+    system 'yarn install'
   end
 
   def self.install
+    system "mkdir -p #{CREW_DEST_DIR}#{CREW_LIB_PREFIX}/heroku"
+    system "cp -r . #{CREW_DEST_DIR}#{CREW_LIB_PREFIX}/heroku"
     system "mkdir -p #{CREW_DEST_DIR}#{CREW_PREFIX}/bin"
-    system "mkdir -p #{CREW_DEST_DIR}#{CREW_PREFIX}/share/heroku"
-    system "cp -r . #{CREW_DEST_DIR}#{CREW_PREFIX}/share/heroku"
-    FileUtils.cd("#{CREW_DEST_DIR}#{CREW_PREFIX}/bin") do
-      system "ln -s /usr/local/share/heroku/bin/run heroku"
-    end
-    puts ""
-    puts "To finish the installation, execute the following:".lightblue
-    puts "source ~/.bashrc".lightblue
-    puts ""
+    system "ln -s #{CREW_LIB_PREFIX}/heroku/bin/run #{CREW_DEST_DIR}#{CREW_PREFIX}/bin/heroku"
   end
 end