feat: add support for ruby 4.0 (#855)

Author: reedham-aws

.github/workflows/build.yml

@@ -322,7 +322,7 @@ jobs:
       - run: pytest -vv tests/integration/workflows/python_uv
 
   ruby-integration:
-    name: ${{ matrix.os }} / ${{ matrix.python }} / ruby
+    name: ${{ matrix.os }} / ${{ matrix.python }} / ruby ${{ matrix.ruby }}
     if: github.repository_owner == 'aws'
     runs-on: ${{ matrix.os }}
     strategy:
@@ -333,14 +333,17 @@ jobs:
           - windows-latest
         python:
           - "3.13"
+        ruby:
+          - "3.2"
+          - "4.0"
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - uses: ruby/setup-ruby@4dc28cf14d77b0afa6832d9765ac422dbf0dfedd # v1
         with:
-          ruby-version: "3.2"
+          ruby-version: ${{ matrix.ruby }}
       - run: make init
       - run: pytest -vv tests/integration/workflows/ruby_bundler
 

aws_lambda_builders/supported_runtimes.py

@@ -32,6 +32,7 @@
     "ruby3.2",
     "ruby3.3",
     "ruby3.4",
+    "ruby4.0",
 ]
 
 # Java runtimes

tests/integration/workflows/ruby_bundler/test_ruby.py

@@ -21,6 +21,7 @@
         ("ruby3.2",),
         ("ruby3.3",),
         ("ruby3.4",),
+        ("ruby4.0",),
     ],
 )
 class TestRubyWorkflow(TestCase):