ruby: install additional versions (#57)

* ruby: install additional versions

* nit: fixing spelling

Co-authored-by: Josh Spicer <joshspicer@github.com>

src/ruby/devcontainer-feature.json

@@ -24,9 +24,5 @@
         "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}"
-    },
-    "install": {
-        "app": "",
-        "file": "install.sh"
     }
 }

src/ruby/install.sh

@@ -13,6 +13,10 @@ USERNAME=${USERNAME:-"automatic"}
 UPDATE_RC=${UPDATE_RC:-"true"}
 INSTALL_RUBY_TOOLS=${INSTALL_RUBY_TOOLS:-"true"}
 
+# Comma-separated list of ruby versions to be installed (with rvm)
+# alongside RUBY_VERSION, but not set as default.
+ADDITIONAL_VERSIONS=${ADDITIONAL_VERSIONS:-""}
+
 # Note: ruby-debug-ide will install the right version of debase if missing and
 # installing debase directly fails on Ruby 3.1.0 as of 1/7/2022, so omitting.
 DEFAULT_GEMS="rake ruby-debug-ide"
@@ -239,6 +243,20 @@ fi
 # VS Code server usually first in the path, so silence annoying rvm warning (that does not apply) and then source it
 updaterc "if ! grep rvm_silence_path_mismatch_check_flag \$HOME/.rvmrc > /dev/null 2>&1; then echo 'rvm_silence_path_mismatch_check_flag=1' >> \$HOME/.rvmrc; fi\nsource /usr/local/rvm/scripts/rvm > /dev/null 2>&1"
 
+# Additional ruby versions to be installed but not be set as default.
+if [ ! -z "${ADDITIONAL_VERSIONS}" ]; then
+    OLDIFS=$IFS
+    IFS=","
+        read -a additional_versions <<< "$ADDITIONAL_VERSIONS"
+        for version in "${additional_versions[@]}"; do
+            # Figure out correct version of a three part version number is not passed
+            find_version_from_git_tags version "https://github.com/ruby/ruby" "tags/v" "_"
+            source /usr/local/rvm/scripts/rvm
+            rvm install ruby ${version}
+        done
+    IFS=$OLDIFS
+fi
+
 # Install rbenv/ruby-build for good measure
 if [ "${SKIP_RBENV_RBUILD}" != "true" ]; then
 

test-scenarios/install_additional_ruby.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+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
+
+# Report result
+reportResults

test-scenarios/scenarios.json

@@ -11,5 +11,14 @@
                 "configure_jupyterlab_allow_origin": "*"
             }
         }
+    },
+    "install_additional_ruby": {
+        "image": "ubuntu:focal",
+        "features": {
+            "ruby": {
+                "version": "3.1.2",
+                "additional_versions": "2.5,3.0.4"
+            }
+        }
     }
 }