Improve local build and test tooling

.dockerignore

@@ -3,6 +3,8 @@
 /vendor
 /Gemfile.lock
 *.gem
-/Makefile
+Makefile
 *.so
 *.bundle
+/ext/libv8-node/.location.yml
+/test/mini_racer

.gitignore

@@ -4,3 +4,5 @@
 /Gemfile.lock
 *.gem
 Makefile
+/ext/libv8-node/.location.yml
+/test/mini_racer

Dockerfile

@@ -1,4 +1,4 @@
-ARG RUBY_VERSION=2.7
+ARG RUBY_VERSION=2.3
 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

Makefile

@@ -0,0 +1,45 @@
+PWD := $(shell pwd)
+VERSION := $(shell ./libexec/metadata version)
+NODE_VERSION := $(shell ./libexec/metadata node_version)
+
+all:
+
+pkg/libv8-node-$(VERSION)-x86_64-linux.gem:
+	docker build --platform linux/amd64 --build-arg RUBY_VERSION=2.3 --progress plain -t libv8-node:gnu .
+	docker run --platform linux/amd64 --rm -it -v "$(PWD)/pkg":/pkg libv8-node:gnu cp $@ /pkg/
+
+pkg/libv8-node-$(VERSION)-x86_64-linux-musl.gem:
+	docker build --platform linux/amd64 --build-arg RUBY_VERSION=2.4-alpine --progress plain -t libv8-node:musl .
+	docker run --platform linux/amd64 --rm -it -v "$(PWD)/pkg":/pkg libv8-node:musl cp $@ /pkg/
+
+pkg/libv8-node-$(VERSION)-aarch64-linux.gem:
+	docker build --platform linux/arm64 --build-arg RUBY_VERSION=2.3 --progress plain -t libv8-node:gnu .
+	docker run --platform linux/arm64 --rm -it -v "$(PWD)/pkg":/pkg libv8-node:gnu cp $@ /pkg/
+
+pkg/libv8-node-$(VERSION)-aarch64-linux-musl.gem:
+	docker build --platform linux/arm64 --build-arg RUBY_VERSION=2.4-alpine --progress plain -t libv8-node:musl .
+	docker run --platform linux/arm64 --rm -it -v "$(PWD)/pkg":/pkg libv8-node:musl cp $@ /pkg/
+
+test/x86_64-linux: pkg/libv8-node-$(VERSION)-x86_64-linux.gem
+	test -d test/mini_racer || git clone https://github.com/rubyjs/mini_racer.git test/mini_racer --depth 1
+	cd test/mini_racer && git fetch origin refs/pull/186/head && git checkout FETCH_HEAD && git reset --hard && git clean -f -d -x
+	ruby -i -ne '$$_ =~ /^\s+LIBV8_NODE_VERSION/ ? print("  LIBV8_NODE_VERSION = \"15.12.0.0.beta1\"\n") : print' test/mini_racer/lib/mini_racer/version.rb
+	docker run --platform linux/amd64 --rm -it -v "$(PWD)/test:/code/test" -w "/code/test/mini_racer" libv8-node:gnu sh -c 'gem install ../../$< && bundle install && bundle exec rake compile && bundle exec rake test'
+
+test/x86_64-linux-musl: pkg/libv8-node-$(VERSION)-x86_64-linux-musl.gem
+	test -d test/mini_racer || git clone https://github.com/rubyjs/mini_racer.git test/mini_racer --depth 1
+	cd test/mini_racer && git fetch origin refs/pull/186/head && git checkout FETCH_HEAD && git reset --hard && git clean -f -d -x
+	ruby -i -ne '$$_ =~ /^\s+LIBV8_NODE_VERSION/ ? print("  LIBV8_NODE_VERSION = \"15.12.0.0.beta1\"\n") : print' test/mini_racer/lib/mini_racer/version.rb
+	docker run --platform linux/amd64 --rm -it -v "$(PWD)/test:/code/test" -w "/code/test/mini_racer" libv8-node:musl sh -c 'gem install ../../$< && bundle install && bundle exec rake compile && bundle exec rake test'
+
+test/aarch64-linux: pkg/libv8-node-$(VERSION)-aarch64-linux.gem
+	test -d test/mini_racer || git clone https://github.com/rubyjs/mini_racer.git test/mini_racer --depth 1
+	cd test/mini_racer && git fetch origin refs/pull/186/head && git checkout FETCH_HEAD && git reset --hard && git clean -f -d -x
+	ruby -i -ne '$$_ =~ /^\s+LIBV8_NODE_VERSION/ ? print("  LIBV8_NODE_VERSION = \"15.12.0.0.beta1\"\n") : print' test/mini_racer/lib/mini_racer/version.rb
+	docker run --platform linux/arm64 --rm -it -v "$(PWD)/test:/code/test" -w "/code/test/mini_racer" libv8-node:gnu sh -c 'gem install ../../$< && bundle install && bundle exec rake compile && bundle exec rake test'
+
+test/aarch64-linux-musl: pkg/libv8-node-$(VERSION)-aarch64-linux-musl.gem
+	test -d test/mini_racer || git clone https://github.com/rubyjs/mini_racer.git test/mini_racer --depth 1
+	cd test/mini_racer && git fetch origin refs/pull/186/head && git checkout FETCH_HEAD && git reset --hard && git clean -f -d -x
+	ruby -i -ne '$$_ =~ /^\s+LIBV8_NODE_VERSION/ ? print("  LIBV8_NODE_VERSION = \"15.12.0.0.beta1\"\n") : print' test/mini_racer/lib/mini_racer/version.rb
+	docker run --platform linux/arm64 --rm -it -v "$(PWD)/test:/code/test" -w "/code/test/mini_racer" libv8-node:musl sh -c 'gem install ../../$< && bundle install && bundle exec rake compile && bundle exec rake test'

libexec/metadata

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+case "$1" in
+    ruby_platform)
+        ruby -e 'puts RUBY_PLATFORM'
+        ;;
+    gem_platform)
+        ruby -e 'puts Gem.platforms.last.to_s'
+        ;;
+    version)
+        ruby -I'lib' -r'libv8/node/version' -e 'puts Libv8::Node::VERSION'
+        ;;
+    node_version)
+        ruby -I'lib' -r'libv8/node/version' -e 'puts Libv8::Node::NODE_VERSION'
+        ;;
+    libv8_version)
+        ruby -I'lib' -r'libv8/node/version' -e 'puts Libv8::Node::LIBV8_VERSION'
+        ;;
+    libv8_version_h)
+        # shellcheck disable=SC2016
+        ruby -e 'h = File.read("src/node-'"$("$0" node_version)"'/deps/v8/include/v8-version.h"); eval h.each_line.with_object([]) { |l, e| l =~ /#define (V8_[A-Z_]+)\s(\d+)/ && e << "#{$1} = #{$2}" }.join(";"); puts "#{V8_MAJOR_VERSION}.#{V8_MINOR_VERSION}.#{V8_BUILD_NUMBER}.#{V8_PATCH_LEVEL}"'
+        ;;
+    *)
+        exit 64
+        ;;
+esac