Rake tasks for managing shopify-extensions

* Supports updating of shopify-extensions through shopify:extensions:update VERSION=vx.y.Z
* Supports symlinking a local development build through shopify:extensions:symlink

.gitignore

@@ -20,4 +20,4 @@ packaging/debian/shopify-cli.deb
 packaging/rpm/build
 packaging/rpm/shopify-cli.spec
 .byebug_history
-ext/shopify-extensions/shopify-extensions
+ext/shopify-extensions/shopify-extensions

Rakefile

@@ -111,3 +111,28 @@ end
 
 desc("Builds all distribution packages of the CLI")
 task(package: "package:all")
+
+namespace :shopify do
+  namespace :extensions do
+    task :update do
+      version = ENV.fetch("VERSION").strip
+      error("Invalid version") unless /^v\d+\.\d+\.\d+/.match(version)
+      extconf = File.expand_path("../ext/shopify-extensions/extconf.rb", __FILE__)
+      File.open(extconf) do |f|
+        IO.write(extconf, f.read.gsub(/(?<=version: ")(.*?)(?=")/, version))
+      end
+    end
+
+    task :symlink do
+      root = File.dirname(__FILE__)
+      executable = File.expand_path("../shopify-cli-extensions/shopify-extensions", root)
+      error("Unable to find shopify-extensions executable: #{executable}") unless File.executable?(executable)
+      File.symlink(executable, File.join(root, "ext/shopify-extensions/shopify-extensions"))
+    end
+
+    def error(message, output: STDERR, code: 1)
+      output.puts(message)
+      exit(code)
+    end
+  end
+end