Templatize our Dockerfiles

2.0/Dockerfile

@@ -6,7 +6,7 @@ ENV RUBY_DOWNLOAD_SHA256 8690bd6b4949c333b3919755c4e48885dbfed6fd055fe9ef89930bd
 ENV RUBYGEMS_VERSION 2.5.2
 
 # skip installing gem documentation
-RUN echo 'install: --no-document\nupdate: --no-document' > "$HOME/.gemrc"
+RUN echo 'install: --no-document\nupdate: --no-document' >> "$HOME/.gemrc"
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built

Dockerfile-alpine.template

@@ -0,0 +1,81 @@
+FROM alpine:3.3
+
+ENV RUBY_MAJOR %%VERSION%%
+ENV RUBY_VERSION %%FULL_VERSION%%
+ENV RUBY_DOWNLOAD_SHA256 %%SHA256%%
+ENV RUBYGEMS_VERSION %%RUBYGEMS%%
+
+# skip installing gem documentation
+RUN echo -e 'install: --no-document\nupdate: --no-document' >> "$HOME/.gemrc"
+
+RUN set -x \
+	&& apk add --no-cache --virtual .ruby-builddeps \
+		autoconf \
+		bison \
+		bzip2 \
+		bzip2-dev \
+		ca-certificates \
+		coreutils \
+		curl \
+		gcc \
+		gdbm-dev \
+		glib-dev \
+		libc-dev \
+		libedit-dev \
+		libffi-dev \
+		libxml2-dev \
+		libxslt-dev \
+		linux-headers \
+		make \
+		ncurses-dev \
+		openssl-dev \
+		procps \
+		ruby \
+		yaml-dev \
+		zlib-dev \
+	&& curl -fSL -o ruby.tar.gz "http://cache.ruby-lang.org/pub/ruby/$RUBY_MAJOR/ruby-$RUBY_VERSION.tar.gz" \
+	&& echo "$RUBY_DOWNLOAD_SHA256 *ruby.tar.gz" | sha256sum -c - \
+	&& mkdir -p /usr/src \
+	&& tar -xzf ruby.tar.gz -C /usr/src \
+	&& mv "/usr/src/ruby-$RUBY_VERSION" /usr/src/ruby \
+	&& rm ruby.tar.gz \
+	&& cd /usr/src/ruby \
+	&& autoconf \
+	# the configure script does not detect isnan/isinf as macros
+	&& ac_cv_func_isnan=yes ac_cv_func_isinf=yes ./configure --disable-install-doc \
+	&& make -j"$(nproc)" \
+	&& make install \
+	&& gem update --system $RUBYGEMS_VERSION \
+	&& runDeps="$( \
+		scanelf --needed --nobanner --recursive /usr/local \
+			| awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
+			| sort -u \
+			| xargs -r apk info --installed \
+			| sort -u \
+	)" \
+	&& apk add --virtual .ruby-rundeps $runDeps \
+		bzip2 \
+		ca-certificates \
+		curl \
+		libffi-dev \
+		openssl-dev \
+		yaml-dev \
+		procps \
+		zlib-dev \
+	&& apk del .ruby-builddeps \
+	&& rm -r /usr/src/ruby
+
+# install things globally, for great justice
+ENV GEM_HOME /usr/local/bundle
+ENV PATH $GEM_HOME/bin:$PATH
+
+ENV BUNDLER_VERSION %%BUNDLER%%
+
+RUN gem install bundler --version "$BUNDLER_VERSION" \
+	&& bundle config --global path "$GEM_HOME" \
+	&& bundle config --global bin "$GEM_HOME/bin"
+
+# don't create ".bundle" in all our apps
+ENV BUNDLE_APP_CONFIG $GEM_HOME
+
+CMD [ "irb" ]

Dockerfile-onbuild.template

@@ -0,0 +1,13 @@
+FROM ruby:%%VERSION%%
+
+# throw errors if Gemfile has been modified since Gemfile.lock
+RUN bundle config --global frozen 1
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+ONBUILD COPY Gemfile /usr/src/app/
+ONBUILD COPY Gemfile.lock /usr/src/app/
+ONBUILD RUN bundle install
+
+ONBUILD COPY . /usr/src/app

Dockerfile-slim.template

@@ -0,0 +1,72 @@
+FROM debian:jessie
+
+RUN apt-get update \
+	&& apt-get install -y --no-install-recommends \
+		bzip2 \
+		ca-certificates \
+		curl \
+		libffi-dev \
+		libgdbm3 \
+		libssl-dev \
+		libyaml-dev \
+		procps \
+		zlib1g-dev \
+	&& rm -rf /var/lib/apt/lists/*
+
+ENV RUBY_MAJOR %%VERSION%%
+ENV RUBY_VERSION %%FULL_VERSION%%
+ENV RUBY_DOWNLOAD_SHA256 %%SHA256%%
+ENV RUBYGEMS_VERSION %%RUBYGEMS%%
+
+# skip installing gem documentation
+RUN echo 'install: --no-document\nupdate: --no-document' >> "$HOME/.gemrc"
+
+# some of ruby's build scripts are written in ruby
+# we purge this later to make sure our final image uses what we just built
+RUN buildDeps=' \
+		autoconf \
+		bison \
+		gcc \
+		libbz2-dev \
+		libgdbm-dev \
+		libglib2.0-dev \
+		libncurses-dev \
+		libreadline-dev \
+		libxml2-dev \
+		libxslt-dev \
+		make \
+		ruby \
+	' \
+	&& set -x \
+	&& apt-get update \
+	&& apt-get install -y --no-install-recommends $buildDeps \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& mkdir -p /usr/src/ruby \
+	&& curl -fSL -o ruby.tar.gz "http://cache.ruby-lang.org/pub/ruby/$RUBY_MAJOR/ruby-$RUBY_VERSION.tar.gz" \
+	&& echo "$RUBY_DOWNLOAD_SHA256 *ruby.tar.gz" | sha256sum -c - \
+	&& tar -xzf ruby.tar.gz -C /usr/src/ruby --strip-components=1 \
+	&& rm ruby.tar.gz \
+	&& cd /usr/src/ruby \
+	&& autoconf \
+	&& ./configure --disable-install-doc \
+	&& make -j"$(nproc)" \
+	&& make install \
+	&& gem update --system $RUBYGEMS_VERSION \
+	&& rm -r /usr/src/ruby \
+	&& apt-get purge -y --auto-remove $buildDeps
+
+# install things globally, for great justice
+ENV GEM_HOME /usr/local/bundle
+ENV PATH $GEM_HOME/bin:$PATH
+
+ENV BUNDLER_VERSION %%BUNDLER%%
+
+RUN gem install bundler --version "$BUNDLER_VERSION" \
+	&& bundle config --global path "$GEM_HOME" \
+	&& bundle config --global bin "$GEM_HOME/bin" \
+	&& bundle config --global silence_root_warning true
+
+# don't create ".bundle" in all our apps
+ENV BUNDLE_APP_CONFIG $GEM_HOME
+
+CMD [ "irb" ]

Dockerfile.template

@@ -0,0 +1,44 @@
+FROM buildpack-deps:jessie
+
+ENV RUBY_MAJOR %%VERSION%%
+ENV RUBY_VERSION %%FULL_VERSION%%
+ENV RUBY_DOWNLOAD_SHA256 %%SHA256%%
+ENV RUBYGEMS_VERSION %%RUBYGEMS%%
+
+# skip installing gem documentation
+RUN echo 'install: --no-document\nupdate: --no-document' >> "$HOME/.gemrc"
+
+# some of ruby's build scripts are written in ruby
+# we purge this later to make sure our final image uses what we just built
+RUN apt-get update \
+	&& apt-get install -y bison libgdbm-dev ruby \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& mkdir -p /usr/src/ruby \
+	&& curl -fSL -o ruby.tar.gz "http://cache.ruby-lang.org/pub/ruby/$RUBY_MAJOR/ruby-$RUBY_VERSION.tar.gz" \
+	&& echo "$RUBY_DOWNLOAD_SHA256 *ruby.tar.gz" | sha256sum -c - \
+	&& tar -xzf ruby.tar.gz -C /usr/src/ruby --strip-components=1 \
+	&& rm ruby.tar.gz \
+	&& cd /usr/src/ruby \
+	&& autoconf \
+	&& ./configure --disable-install-doc \
+	&& make -j"$(nproc)" \
+	&& make install \
+	&& apt-get purge -y --auto-remove bison libgdbm-dev ruby \
+	&& gem update --system $RUBYGEMS_VERSION \
+	&& rm -r /usr/src/ruby
+
+# install things globally, for great justice
+ENV GEM_HOME /usr/local/bundle
+ENV PATH $GEM_HOME/bin:$PATH
+
+ENV BUNDLER_VERSION %%BUNDLER%%
+
+RUN gem install bundler --version "$BUNDLER_VERSION" \
+	&& bundle config --global path "$GEM_HOME" \
+	&& bundle config --global bin "$GEM_HOME/bin" \
+	&& bundle config --global silence_root_warning true
+
+# don't create ".bundle" in all our apps
+ENV BUNDLE_APP_CONFIG $GEM_HOME
+
+CMD [ "irb" ]

update.sh

@@ -25,22 +25,21 @@ for version in "${versions[@]}"; do
 		| sed -r 's!.*<a href="ruby-([^"]+)\.tar\.bz2.*!\1!' \
 		| sort -V | tail -1)"
 	shaVal="$(echo $shaPage | sed -r "s/.*Ruby ${fullVersion}<\/a><br \/> sha256: ([^<]+).*/\1/")"
-	(
-		set -x
-		sed -ri '
-			s/^(ENV RUBY_MAJOR) .*/\1 '"$version"'/;
-			s/^(ENV RUBY_VERSION) .*/\1 '"$fullVersion"'/;
-			s/^(ENV RUBY_DOWNLOAD_SHA256) .*/\1 '"$shaVal"'/;
-			s/^(ENV BUNDLER_VERSION) .*/\1 '"$bundler"'/;
-			s/^(ENV RUBYGEMS_VERSION) .*/\1 '"$rubygems"'/;
-		' "$version"{/,/*/}Dockerfile
-		sed -ri 's/^(FROM ruby):.*/\1:'"$version"'/' "$version/"*"/Dockerfile"
-	)
-	for variant in alpine slim; do
+
+	sedStr="
+		s!%%VERSION%%!$version!g;
+		s!%%FULL_VERSION%%!$fullVersion!g;
+		s!%%SHA256%%!$shaVal!g;
+		s!%%RUBYGEMS%%!$rubygems!g;
+		s!%%BUNDLER%%!$bundler!g;
+	"
+	for variant in alpine slim onbuild ''; do
 		[ -d "$version/$variant" ] || continue
-		travisEnv='\n  - VERSION='"$version VARIANT=$variant$travisEnv"
+		sed -r "$sedStr" "Dockerfile${variant:+-$variant}.template" > "$version/$variant/Dockerfile"
+		if [ "$variant" != 'onbuild' ]; then
+			travisEnv='\n  - VERSION='"$version VARIANT=$variant$travisEnv"
+		fi
 	done
-	travisEnv='\n  - VERSION='"$version VARIANT=$travisEnv"
 done
 
 travis="$(awk -v 'RS=\n\n' '$1 == "env:" { $0 = "env:'"$travisEnv"'" } { printf "%s%s", $0, RS }' .travis.yml)"