Add explicit rbenv support via 'rbenv:load'. See #5, #39.

lib/mina/rbenv.rb

@@ -0,0 +1,26 @@
+# Common usage:
+#
+#     task :environment do
+#       invoke :'rbenv:load'
+#     end
+#
+#     task :deploy => :environment do
+#       ...
+#     end
+#
+set_default :rbenv_path, "$HOME/.rbenv"
+
+task :'rbenv:load' do
+  queue %{
+    echo "-----> Loading rbenv"
+    #{echo_cmd %{export PATH="#{rbenv_path}/bin:$PATH"}}
+
+    # Ensure that rbenv is loaded.
+    if ! which -s rbenv >/dev/null; then
+      echo "! rbenv not found"
+      echo "! If rbenv is installed, check your 'rbenv_path' setting"
+    fi
+
+    #{echo_cmd %{eval "$(rbenv init -)"}}
+  }
+end