Add definition for truffleruby+graalvm GFTC dev build

Different releases contain different assets so attempt to loop through
the releases to find the latest one with the desired asset.

rubies/truffleruby+graalvm-gftc-dev

@@ -0,0 +1,44 @@
+find_asset_url () {
+  local repo="$1" filename="$2"
+  local releases_prefix="https://github.com/${repo}/releases"
+  local assets_urls assets_url path
+  IFS=$'\n' read -d '' -r -a assets_urls < <(curl -s "$releases_prefix" | grep -oE "$releases_prefix/expanded_assets/[^\"]+")
+  for assets_url in "${assets_urls[@]}"; do
+    path="$(curl -s "$assets_url" | grep -m1 -oE "/$repo/releases/download/[^/]+/$filename")"
+    if [[ -n "$path" ]]; then
+      echo "https://github.com/$path"
+      return 0
+    fi
+  done
+
+  echo "Failed to find $repo release containing $filename" >&2
+  return 1
+}
+
+truffleruby_asset_url () {
+  find_asset_url "graalvm/oracle-graalvm-dev-builds" "$1"
+}
+
+platform="$(uname -s)-$(uname -m)"
+case $platform in
+Linux-x86_64)
+  truffleruby_url="$(truffleruby_asset_url "truffleruby-jvm-dev-linux-amd64.tar.gz")" || return $?
+  install_package "truffleruby+graalvm-gftc-dev" "$truffleruby_url" truffleruby
+  ;;
+Linux-aarch64)
+  truffleruby_url="$(truffleruby_asset_url "/truffleruby-jvm-dev-linux-aarch64.tar.gz")" || return $?
+  install_package "truffleruby+graalvm-gftc-dev" "$truffleruby_url" truffleruby
+  ;;
+Darwin-x86_64)
+  truffleruby_url="$(truffleruby_asset_url "truffleruby-jvm-dev-macos-amd64.tar.gz")" || return $?
+  install_package "truffleruby+graalvm-gftc-dev" "$truffleruby_url" truffleruby
+  ;;
+Darwin-arm64)
+  truffleruby_url="$(truffleruby_asset_url "truffleruby-jvm-dev-macos-aarch64.tar.gz")" || return $?
+  install_package "truffleruby+graalvm-gftc-dev" "$truffleruby_url" truffleruby
+  ;;
+*)
+  colorize 1 "Unsupported platform: $platform"
+  return 1
+  ;;
+esac

test/shopify_ruby_definitions/test_ruby_versions.rb

@@ -15,7 +15,7 @@ def test_ALL_VERSIONS
       end
 
       truffleruby_versions.each do |v|
-        assert_match(/\Atruffleruby(?:\+graalvm|-gftc)?(\-\d+\.\d+\.\d+|-dev)(?:\-ce)?\z/, v)
+        assert_match(/\Atruffleruby(?:\+graalvm)?(?:-gftc)?(\-\d+\.\d+\.\d+|-dev)(?:\-ce)?\z/, v)
       end
     end