Ruby: Fix rbenv init bug (#185)

* fix rbenv bug

* bump version

* adds test

src/ruby/devcontainer-feature.json

 {
     "id": "ruby",
-    "version": "1.0.3",
+    "version": "1.0.4",
     "name": "Ruby (via rvm)",
     "documentationURL": "https://github.com/devcontainers/features/tree/main/src/ruby",
     "description": "Installs Ruby, rvm, rbenv, common Ruby utilities, and needed dependencies.",
@@ -29,6 +29,6 @@
         "GEM_PATH": "/usr/local/rvm/gems/default:/usr/local/rvm/gems/default@global",
         "GEM_HOME": "/usr/local/rvm/gems/default",
         "MY_RUBY_HOME": "/usr/local/rvm/rubies/default",
-        "PATH": "/usr/local/rvm/gems/default/bin:/usr/local/rvm/gems/default@global/bin:/usr/local/rvm/rubies/default/bin:${PATH}"
+        "PATH": "/usr/local/rvm/gems/default/bin:/usr/local/rvm/gems/default@global/bin:/usr/local/rvm/rubies/default/bin:/usr/local/share/rbenv/bin:${PATH}"
     }
 }
\ No newline at end of file

src/ruby/install.sh

@@ -263,9 +263,6 @@ if [ "${SKIP_RBENV_RBUILD}" != "true" ]; then
             -c fetch.fsck.zeroPaddedFilemode=ignore \
             -c receive.fsck.zeroPaddedFilemode=ignore \
             https://github.com/rbenv/rbenv.git /usr/local/share/rbenv
-    
-        ln -s /usr/local/share/rbenv/bin/rbenv /usr/local/bin
-        updaterc 'eval "$(rbenv init -)"'
     fi
 
     if [[ ! -d "/usr/local/share/ruby-build" ]]; then

test/ruby/install_additional_ruby.sh

@@ -9,5 +9,7 @@ check "ruby version 3.1.2 installed as default" ruby -v | grep 3.1.2
 check "ruby version 2.5.9 installed"  rvm list | grep 2.5.9
 check "ruby version 3.0.4 installed"  rvm list | grep 3.0.4
 
+check "rbenv" bash -c 'eval "$(rbenv init -)" && rbenv --version'
+
 # Report result
 reportResults