fix: return type not necessary

.github/workflows/test.yml

@@ -0,0 +1,28 @@
+name: Test
+permissions: read-all
+
+on:
+  push:
+
+jobs:
+  test:
+    name: Test Ruby Versions
+    timeout-minutes: 15
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: [3.0, 3.1, 3.2, 3.3]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build Docker image for Ruby ${{ matrix.ruby-version }}
+        run: |
+          docker build --build-arg RUBY_VERSION=${{ matrix.ruby-version }} -t ruby-app:${{ matrix.ruby-version }} .
+
+      - name: Run Tests with Docker
+        run: |
+          docker run --rm ruby-app:${{ matrix.ruby-version }}

.gitignore

@@ -1,3 +1,4 @@
+Makefile
 mkmf.log
 pkg
 tdes.so

Dockerfile

@@ -0,0 +1,13 @@
+ARG RUBY_VERSION=3.0
+
+FROM ruby:${RUBY_VERSION}-alpine
+
+WORKDIR /usr/src/app
+
+RUN apk add build-base openssl-dev openssl-libs-static
+
+COPY . .
+
+RUN bundle install
+
+CMD ["rake"]

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    tdes (3.0.6)
+    tdes (3.0.7)
 
 GEM
   remote: https://rubygems.org/

Rakefile

@@ -21,9 +21,7 @@ Rake::TestTask.new do |t|
   t.libs << 'test'
 end
 
-task release: :build do
-  system "gem push pkg/tdes-#{Tdes::VERSION}.gem"
-end
+task release: :build
 
 desc 'Check if the compiled shared library exists'
 task :check_compile do

ext/tdes/extconf.rb

@@ -13,7 +13,7 @@
 
     # On MacOS, have_func does not work well because the default compiler is clang instead of gcc
     unless RUBY_PLATFORM.downcase.include? 'darwin'
-      abort 'missing DES_set_key_checked' unless have_func('int DES_set_key_checked', 'openssl/des.h')
+      abort 'missing DES_set_key_checked' unless have_func('DES_set_key_checked', 'openssl/des.h')
       abort 'missing DES_ecb3_encrypt' unless have_func('DES_ecb3_encrypt', 'openssl/des.h')
       # Check for a symbol/function specific to OpenSSL 3.x
       abort 'OpenSSL 3.x required (missing EVP_Cipher function)' unless have_func('EVP_Cipher')

lib/tdes/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Tdes
-  VERSION = '3.0.6'
+  VERSION = '3.0.7'
 end

readme.md

@@ -7,6 +7,11 @@ Ruby native extension for triple DES cryptography.
 rake --tasks
 ```
 
+## Generate Makefile
+```bash
+ruby ext/tdes/extconf.rb
+```
+
 ## Compile
 ```bash
 rake clobber clean compile
@@ -18,7 +23,7 @@ rake test
 ```
 Or
 ```bash
-RUBY_VERSION=3.0 $SHELL -c 'docker run -it --rm --name my-running-script -v "$PWD":/usr/src/myapp -w /usr/src/myapp mirror.gcr.io/ruby:${RUBY_VERSION}-alpine bundle install && rake'
+RUBY_VERSION=3.0 $SHELL -c 'docker build --build-arg RUBY_VERSION=${RUBY_VERSION} -t ruby-app:${RUBY_VERSION} . && docker run -it --rm ruby-app:${RUBY_VERSION}'
 ```
 
 ## Build local version