change default of --link to false

README.md

@@ -52,7 +52,7 @@ different contents.  If both are specified, `--force` takes precedence.
 * `--max-idle=n` - exit afer *n* seconds of inactivity.  Supports [iso 8601](https://en.wikipedia.org/wiki/ISO_8601#Durations) and [sleep](https://man7.org/linux/man-pages/man1/sleep.1.html#DESCRIPTION) syntaxes.  Uses passenger for now, awaiting [puma](https://github.com/puma/puma/issues/2580) support.
 * `--nginx` - serve static files via [nginx](https://www.nginx.com/).  May require `--root` on some targets to access `/dev/stdout`
 * `--thruster` - serve static files via [thruster](https://github.com/basecamp/thruster?tab=readme-ov-file#thruster).
-* `--no-link` - don't add [--link](https://docs.docker.com/engine/reference/builder/#copy---link) to COPY statements.  Some tools (like at the moment, [buildah](https://www.redhat.com/en/topics/containers/what-is-buildah)) don't yet support this feature.
+* `--link` - add [--link](https://docs.docker.com/engine/reference/builder/#copy---link) to COPY statements.  Some tools (like at the moment, [buildah](https://www.redhat.com/en/topics/containers/what-is-buildah)) don't yet support this feature.
 * `--no-lock` - don't add linux platforms, set `BUNDLE_DEPLOY`, or `--frozen-lockfile`.  May be needed at times to work around a [rubygems bug](https://github.com/rubygems/rubygems/issues/6082#issuecomment-1329756343).
 * `--sudo` - install and configure sudo to enable `sudo -iu rails` access to full environment
 

lib/generators/dockerfile_generator.rb

@@ -17,7 +17,7 @@ class DockerfileGenerator < Rails::Generators::Base
     "gemfile-updates" => true,
     "jemalloc" => false,
     "label" => {},
-    "link" => true,
+    "link" => false,
     "litefs" => false,
     "lock" => true,
     "max-idle" => nil,
@@ -117,7 +117,7 @@ class DockerfileGenerator < Rails::Generators::Base
   class_option :ci, type: :boolean, default: OPTION_DEFAULTS.ci,
     desc: "include test gems in bundle"
 
-  class_option :link, type: :boolean, default: OPTION_DEFAULTS.lock,
+  class_option :link, type: :boolean, default: OPTION_DEFAULTS.link,
     desc: "use COPY --link whenever possible"
 
   class_option :lock, type: :boolean, default: OPTION_DEFAULTS.lock,

test/results/alpine/Dockerfile

@@ -41,17 +41,17 @@ RUN curl -sL https://unofficial-builds.nodejs.org/download/release/v${NODE_VERSI
     rm -rf /tmp/node-v${NODE_VERSION}-linux-x64-musl
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     bundle exec bootsnap precompile --gemfile && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Install node modules
-COPY --link package.json yarn.lock ./
+COPY package.json yarn.lock ./
 RUN yarn install --frozen-lockfile
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/

test/results/api/Dockerfile

@@ -11,11 +11,11 @@ WORKDIR /rails/my-app
 ENV NODE_ENV=production
 
 # Install node modules
-COPY --link my-app/package.json ./
+COPY my-app/package.json ./
 RUN npm install
 
 # build client application
-COPY --link my-app .
+COPY my-app .
 RUN npm run build
 
 
@@ -43,13 +43,13 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     bundle exec bootsnap precompile --gemfile && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/

test/results/bin_cd/Dockerfile

@@ -26,12 +26,12 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Adjust binfiles to set current working directory
 RUN grep -l '#!/usr/bin/env ruby' /rails/bin/* | xargs sed -i '/^#!/aDir.chdir File.expand_path("..", __dir__)'

test/results/bun/Dockerfile

@@ -32,17 +32,17 @@ ENV PATH=/usr/local/bun/bin:$PATH
 RUN curl -fsSL https://bun.sh/install | bash -s -- "bun-v${BUN_VERSION}"
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     bundle exec bootsnap precompile --gemfile && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Install node modules
-COPY --link package.json bun.lockb ./
+COPY package.json bun.lockb ./
 RUN bun install --frozen-lockfile
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/

test/results/cache/Dockerfile

@@ -37,7 +37,7 @@ RUN curl -sL https://github.com/nodenv/node-build/archive/master.tar.gz | tar xz
     rm -rf /tmp/node-build-master
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN --mount=type=cache,id=bld-gem-cache,sharing=locked,target=/srv/vendor \
     bundle config set app_config .bundle && \
     bundle config set path /srv/vendor && \
@@ -49,12 +49,12 @@ RUN --mount=type=cache,id=bld-gem-cache,sharing=locked,target=/srv/vendor \
     cp -ar /srv/vendor .
 
 # Install node modules
-COPY --link package.json yarn.lock ./
+COPY package.json yarn.lock ./
 RUN --mount=type=cache,id=bld-yarn-cache,target=/root/.yarn \
     YARN_CACHE_FOLDER=/root/.yarn yarn install --frozen-lockfile
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/

test/results/ci/Dockerfile

@@ -26,12 +26,12 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

test/results/config/Dockerfile

@@ -26,12 +26,12 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential libyaml-dev pkg-config
 
 # Install application gems
-COPY Gemfile Gemfile.lock ./
+COPY --link Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY . .
+COPY --link . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

test/results/env/Dockerfile

@@ -30,12 +30,12 @@ ENV AWS_ACCESS_KEY_ID="1" \
     AWS_SECRET_ACCESS_KEY="1"
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

test/results/esbuild/Dockerfile

@@ -35,17 +35,17 @@ RUN curl -sL https://github.com/nodenv/node-build/archive/master.tar.gz | tar xz
     rm -rf /tmp/node-build-master
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     bundle exec bootsnap precompile --gemfile && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Install node modules
-COPY --link package.json yarn.lock ./
+COPY package.json yarn.lock ./
 RUN yarn install --frozen-lockfile
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/

test/results/execjs_importmap/Dockerfile

@@ -41,13 +41,13 @@ RUN apt-get update -qq && \
 ENV PATH="/usr/local/node/bin:$PATH"
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     bundle exec bootsnap precompile --gemfile && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/

test/results/execjs_node/Dockerfile

@@ -45,17 +45,17 @@ RUN npm install -g yarn@$YARN_VERSION
 ENV PATH="/usr/local/node/bin:$PATH"
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     bundle exec bootsnap precompile --gemfile && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Install node modules
-COPY --link package.json yarn.lock ./
+COPY package.json yarn.lock ./
 RUN yarn install --frozen-lockfile
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/

test/results/fullstaq/Dockerfile

@@ -26,12 +26,12 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential libyaml-dev pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

test/results/grover/Dockerfile

@@ -42,16 +42,16 @@ ENV PATH="/usr/local/node/bin:$PATH" \
     PUPPETEER_SKIP_CHROMIUM_DOWNLOAD="true"
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Install node modules
-COPY --link package.json package-lock.json ./
+COPY package.json package-lock.json ./
 RUN npm install
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

test/results/idle/Dockerfile

@@ -36,15 +36,15 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Compile passenger native support
 RUN passenger-config build-native-support
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

test/results/jemalloc/Dockerfile

@@ -26,12 +26,12 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

test/results/label/Dockerfile

@@ -28,12 +28,12 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

test/results/litefs/Dockerfile

@@ -26,13 +26,13 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     bundle exec bootsnap precompile --gemfile && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/
@@ -46,7 +46,7 @@ FROM base
 
 # Install, configure litefs
 COPY --from=flyio/litefs:0.5 /usr/local/bin/litefs /usr/local/bin/litefs
-COPY --link config/litefs.yml /etc/litefs.yml
+COPY config/litefs.yml /etc/litefs.yml
 
 # Install packages needed for deployment
 RUN apt-get update -qq && \

test/results/minimal/Dockerfile

@@ -26,12 +26,12 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

test/results/mysql/Dockerfile

@@ -26,13 +26,13 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential default-libmysqlclient-dev
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     bundle exec bootsnap precompile --gemfile && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/

test/results/nginx/Dockerfile

@@ -26,12 +26,12 @@ RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y build-essential pkg-config
 
 # Install application gems
-COPY --link Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 RUN bundle install && \
     rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 
 # Copy application code
-COPY --link . .
+COPY . .
 
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile