Fixes #127: Unable to install for single user on a fresh machine: freezes asking for sudo password

tasks/rubies.yml

@@ -8,6 +8,13 @@
   with_items: '{{ rvm1_rubies }}'
   when: rvm1_rubies
 
+- name: Install rvm requirements
+  become: yes
+  command: '{{ rvm1_rvm }} requirements'
+  become_method: sudo
+  become_user: root
+  when: rvm1_rubies
+
 - name: Install rubies
   command: '{{ rvm1_rvm }} install {{ item.item }} {{ rvm1_ruby_install_flags }}'
   when: rvm1_rubies and item.rc|default(0) != 0
@@ -17,11 +24,12 @@
   command: '{{ rvm1_rvm }} alias list default'
   changed_when: False
   register: detect_default_ruby_version
+  when: rvm1_rubies
 
 - name: Select default ruby
   command: '{{ rvm1_rvm }} alias create default {{ rvm1_default_ruby_version }}'
-  when: detect_default_ruby_version.stdout|default() == '' or
-        rvm1_default_ruby_version not in detect_default_ruby_version.stdout
+  when: rvm1_rubies and (detect_default_ruby_version.stdout|default() == '' or
+        rvm1_default_ruby_version not in detect_default_ruby_version.stdout)
 
 - name: Detect installed ruby patch number
   shell: >