Update Ruby to 4.0.0 as the default version (#61)

* Update Ruby to 4.0.0 as the default version

- Update .ruby-version to 4.0.0
- Update CI matrix to use stable Ruby 4.0 (removing preview2)
- Move coverage runs from Ruby 3.4 to Ruby 4.0
- Update yard-lint job to use Ruby 4.0.0
- Update Dockerfile to use ruby:4.0-alpine
- Remove the preview-specific Gemfile.lock removal step
- Keep older Ruby versions (3.4, 3.3, 3.2) supported

* Add ruby platform to Gemfile.lock for Ruby 4.0 compatibility

Nokogiri precompiled gems don't support Ruby 4.0 yet, so we need
the ruby platform to compile from source on Ruby 4.0.

* Force ruby platform for Ruby 4.0 jobs

Nokogiri precompiled gems don't support Ruby 4.0 yet, so we need to
force the ruby platform to compile native extensions from source.

* Use BUNDLE_FORCE_RUBY_PLATFORM env var for Ruby 4.0 jobs

Set the environment variable before setup-ruby runs so bundler uses
the ruby platform when installing gems for Ruby 4.0.

* Use ruby platform only in Gemfile.lock for Ruby 4.0 compatibility

Remove platform-specific gem variants and keep only the ruby platform
so that native extensions are compiled from source on all Ruby versions.

* Update unicode-emoji to 4.2.0 for Ruby 4.0 support

Author: mensfeld

.github/workflows/ci.yml

@@ -23,22 +23,18 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - '4.0.0-preview2'
+          - '4.0'
           - '3.4'
           - '3.3'
           - '3.2'
         include:
-          - ruby: '3.4'
+          - ruby: '4.0'
             coverage: 'true'
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           fetch-depth: 0
 
-      - name: Remove Gemfile.lock for Ruby preview versions
-        if: contains(matrix.ruby, 'preview')
-        run: rm -f Gemfile.lock
-
       - name: Set up Ruby
         uses: ruby/setup-ruby@ae195bbe749a7cef685ac729197124a48305c1cb # v1.276.0
         with:
@@ -67,7 +63,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@ae195bbe749a7cef685ac729197124a48305c1cb # v1.276.0
         with:
-          ruby-version: '3.4.8'
+          ruby-version: '4.0.0'
           bundler-cache: true
       - name: Run yard-lint
         run: bundle exec yard-lint lib/

.ruby-version

@@ -1 +1 @@
-3.4.8
+4.0.0

Dockerfile

@@ -4,7 +4,7 @@
 # Creates a minimal Docker image (~50MB) for running the CLI without Ruby installation
 
 # Stage 1: Builder
-FROM ruby:3.4-alpine AS builder
+FROM ruby:4.0-alpine AS builder
 
 # Install build dependencies
 RUN apk add --no-cache \
@@ -36,7 +36,7 @@ RUN bundle config set --local without 'development test' && \
 RUN gem build llm-docs-builder.gemspec
 
 # Stage 2: Runtime
-FROM ruby:3.4-alpine
+FROM ruby:4.0-alpine
 
 # Install runtime dependencies only
 RUN apk add --no-cache \

Gemfile.lock

@@ -16,7 +16,9 @@ GEM
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
     method_source (1.1.0)
-    nokogiri (1.18.10-x86_64-linux-gnu)
+    mini_portile2 (2.8.9)
+    nokogiri (1.18.10)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     parallel (1.27.0)
     parser (3.3.10.0)
@@ -66,15 +68,15 @@ GEM
     simplecov_json_formatter (0.1.4)
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)
-    unicode-emoji (4.1.0)
+    unicode-emoji (4.2.0)
     yard (0.9.38)
     yard-lint (1.3.0)
       yard (~> 0.9)
       zeitwerk (~> 2.6)
     zeitwerk (2.7.3)
 
 PLATFORMS
-  x86_64-linux
+  ruby
 
 DEPENDENCIES
   bundler