Use rv to install Rubies.

.github/workflows/ci.yml

@@ -143,8 +143,7 @@ jobs:
   docker-build:
     name: Build and Push Docker Test Image
     runs-on: ubuntu-latest
-    # Only run on pushes to main when Docker files change
-    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    if: github.event_name == 'pull_request' || (github.event_name == 'push' && github.ref == 'refs/heads/main')
     permissions:
       contents: read
       packages: write
@@ -161,18 +160,20 @@ jobs:
             - 'docker-compose.yml'
 
     - name: Log in to GitHub Container Registry
-      if: steps.changes.outputs.docker == 'true'
+      if: steps.changes.outputs.docker == 'true' && github.event_name == 'push' && github.ref == 'refs/heads/main'
       uses: docker/login-action@v3
       with:
         registry: ghcr.io
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
 
-    - name: Build and push Docker image
+    - name: Build Docker image
       if: steps.changes.outputs.docker == 'true'
-      run: |
-        docker compose build
-        docker compose push
+      run: docker compose build
+
+    - name: Push Docker image
+      if: steps.changes.outputs.docker == 'true' && github.event_name == 'push' && github.ref == 'refs/heads/main'
+      run: docker compose push
 
   test-shellspec-linux:
     name: ShellSpec Tests (Linux)

Dockerfile

@@ -28,40 +28,31 @@ RUN apt-get update && apt-get install -y \
     ca-certificates \
     libjemalloc-dev \
     parallel \
+    xz-utils \
     && rm -rf /var/lib/apt/lists/*
 
-# Install ruby-install once (cached layer)
-RUN curl -fsSL https://github.com/postmodern/ruby-install/releases/download/v0.10.1/ruby-install-0.10.1.tar.gz | tar -xzf - \
-    && cd ruby-install-0.10.1 \
-    && make install \
-    && cd .. \
-    && rm -rf ruby-install-0.10.1
+# Install rv once (cached layer)
+ARG RV_VERSION=0.5.3
+ARG RV_DOWNLOAD_URL=https://github.com/spinel-coop/rv/releases/download/v${RV_VERSION}/rv-x86_64-unknown-linux-gnu.tar.xz
+
+RUN mkdir -p /tmp/rv-install \
+    && curl -fsSL "$RV_DOWNLOAD_URL" | tar -xJ --strip-components=1 -C /tmp/rv-install \
+    && install -m 0755 /tmp/rv-install/rv /usr/local/bin/rv \
+    && rm -rf /tmp/rv-install
 
 # Stage for Ruby 4.0.1 compilation
 FROM base AS ruby-4-0-1
 
 RUN mkdir -p /opt/rubies && \
-    MAKE_OPTS="-j$(nproc)" \
-    ruby-install \
-        --install-dir /opt/rubies/ruby-4.0.1 \
-        --jobs $(nproc) \
-        --cleanup \
-        ruby 4.0.1 \
-        -- --with-jemalloc \
-    && /opt/rubies/ruby-4.0.1/bin/gem install bundler --no-document
+    RV_UPDATE_MODE=none rv ruby install --install-dir /opt/rubies 4.0.1 \
+    && rm -f /usr/local/bin/rv
 
 # Stage for Ruby 3.4.5 compilation  
 FROM base AS ruby-3-4-5
 
 RUN mkdir -p /opt/rubies && \
-    MAKE_OPTS="-j$(nproc)" \
-    ruby-install \
-        --install-dir /opt/rubies/ruby-3.4.5 \
-        --jobs $(nproc) \
-        --cleanup \
-        ruby 3.4.5 \
-        -- --with-jemalloc \
-    && /opt/rubies/ruby-3.4.5/bin/gem install bundler --no-document
+    RV_UPDATE_MODE=none rv ruby install --install-dir /opt/rubies 3.4.5 \
+    && rm -f /usr/local/bin/rv
 
 # Final stage - copy compiled Rubies
 FROM base AS final
@@ -70,7 +61,8 @@ FROM base AS final
 RUN git clone https://github.com/shellspec/shellspec.git /tmp/shellspec \
     && cd /tmp/shellspec \
     && make install PREFIX=/usr/local \
-    && rm -rf /tmp/shellspec
+    && rm -rf /tmp/shellspec \
+    && rm -f /usr/local/bin/rv
 
 # Copy compiled Ruby installations from parallel stages
 COPY --from=ruby-4-0-1 /opt/rubies/ruby-4.0.1 /opt/rubies/ruby-4.0.1