ruby: Workaround ruby-lsp issue with bundler

ruby-lsp calls bundle with an undocumented version number argument
supported by RubyGems binstubs. Portage binstubs don't support this. Use
a wrapper to throw away the version number argument.

See: Shopify/ruby-lsp#3022

data/build/gentoo/stage1.yaml

@@ -22,6 +22,7 @@ nest::classes:
   - 'nest::base::portage'
   - 'nest::base::puppet'
   - 'nest::base::qemu'
+  - 'nest::base::ruby'
   - 'nest::base::scripts'
   - 'nest::base::ssh'
   - 'nest::base::sudo'

manifests/base/ruby.pp

@@ -0,0 +1,18 @@
+class nest::base::ruby {
+  # Workaround ruby-lsp issue calling bundle with version argument
+  # See: https://github.com/Shopify/ruby-lsp/issues/3022
+  exec { '/bin/mv /usr/bin/bundle /usr/bin/bundle.real':
+    onlyif => '/bin/grep -E "Generated by ruby-fakegem.eclass" /usr/bin/bundle',
+  }
+  ->
+  file { '/usr/bin/bundle':
+    mode    => '0755',
+    owner   => 'root',
+    group   => 'root',
+    content => @(WRAPPER),
+      #!/bin/bash
+      [[ $1 == _*_ ]] && shift
+      exec /usr/bin/bundle.real "$@"
+      | WRAPPER
+  }
+}

spec/classes/nest_spec.rb

@@ -30,6 +30,7 @@
     'nest::base::portage',
     'nest::base::puppet',
     'nest::base::qemu',
+    'nest::base::ruby',
     'nest::base::scripts',
     'nest::base::ssh',
     'nest::base::sudo',