Add Dockerfile for reproducing local builds

Author: lloeki

.dockerignore

@@ -0,0 +1,8 @@
+/pkg
+/src
+/vendor
+/Gemfile.lock
+*.gem
+/Makefile
+*.so
+*.bundle

Dockerfile

@@ -0,0 +1,34 @@
+ARG RUBY_VERSION=2.7
+FROM ruby:${RUBY_VERSION}
+
+RUN test ! -f /etc/alpine-release || apk add --no-cache build-base bash python2 python3 git curl tar clang binutils-gold
+
+RUN mkdir -p /code
+WORKDIR /code
+
+ARG NODE_VERSION=14.14.0
+
+COPY download-node /code/
+RUN ./download-node ${NODE_VERSION}
+COPY extract-node /code/
+RUN ./extract-node ${NODE_VERSION}
+COPY build-libv8 /code/
+RUN ./build-libv8 ${NODE_VERSION}
+COPY build-monolith /code/
+RUN ./build-monolith ${NODE_VERSION}
+COPY inject-libv8 /code/
+RUN ./inject-libv8 ${NODE_VERSION}
+
+# without this `COPY .git`, we get the following error:
+#   fatal: not a git repository (or any of the parent directories): .git
+# but with it we need the full gem just to compile the extension because
+# of gemspec's `git --ls-files`
+# COPY .git /code/.git
+COPY Gemfile libv8-node.gemspec /code/
+COPY lib/libv8/node/version.rb /code/lib/libv8/node/version.rb
+RUN bundle install
+
+COPY . /code/
+RUN bundle exec rake binary
+
+CMD /bin/bash