install_files/specified_yarn.rb in bard-0.42.0 vs install_files/specified_yarn.rb in bard-0.43.0

@@ -1,34 +1,31 @@
 module SpecifiedYarn
   extend self
 
-  YARN_PATH = "node_modules/yarn/bin/yarn"
+  YARN_VERSION = "v1.22.0"
+  YARN_PATH = "tmp/yarn-#{YARN_VERSION}/bin/yarn.js"
 
   def ensure!
     install_yarn unless yarn_installed?
-    install_binstub unless binstub_installed?
+    install_binstub
     "bin/yarn install"
   end
 
   private
 
   def install_yarn
-    system(". ~/.nvm/nvm.sh && npm install yarn@#{version} --no-save")
+    system("wget -cO- https://github.com/yarnpkg/yarn/releases/download/#{YARN_VERSION}/yarn-#{YARN_VERSION}.tar.gz | tar -xz -C tmp/")
   end
 
   def install_binstub
-    system("cd bin && ln -s ../#{YARN_PATH}")
+    system("cd bin && ln -fs ../#{YARN_PATH}")
   end
 
   def yarn_installed?
-    File.exist?(YARN_PATH) && `#{YARN_PATH} --version`.chomp == version
+    File.exist?(YARN_PATH) && `bin/node #{YARN_PATH} --version`.chomp == YARN_VERSION[1..-1]
   end
 
   def binstub_installed?
     File.exist?("bin/yarn")
-  end
-
-  def version
-    File.read("package.json")[/"yarn": "([0-9\.]+)"/, 1]
   end
 end