Enhancement: support to actually install any version npm we need

nodejs/recipes/npm.rb

@@ -23,6 +23,8 @@
   include_recipe 'nodejs::install'
 when 'source'
   include_recipe 'nodejs::npm_from_source'
+when 'from_latest'
+  include_recipe 'nodejs::npm_from_latest'
 else
   Chef::Log.error('No install method found for npm')
 end

nodejs/recipes/npm_from_latest.rb

@@ -0,0 +1,35 @@
+npm_bin = '/usr/bin/npm'
+
+local_latest = "#{Chef::Config[:file_cache_path]}/install-npm.sh"
+
+npm_version = node['nodejs']['npm']['version']
+
+is_correct_version = ->(version) {
+  `npm -v`.strip! == version
+}
+
+remote_file local_latest do
+  source 'https://www.npmjs.org/install.sh'
+  mode '0755'
+  not_if do
+    File.exist?(local_latest) || is_correct_version[npm_version]
+  end
+end
+
+package "curl" do
+  action :install
+  only_if do
+    File.exist?(local_latest)
+  end
+end
+
+execute 'Install npm' do
+  command local_latest
+  environment({
+    'clean' => 'no',
+    'npm_install' => npm_version
+  })
+  not_if do
+    is_correct_version[npm_version]
+  end
+end