添加 post_process 插件 (#445)

_plugins/post_process.rb

@@ -0,0 +1,51 @@
+require "terser"
+
+ExecJS.runtime = ExecJS::Runtimes::MiniRacer if ExecJS::Runtimes::MiniRacer.available?
+
+Jekyll::Hooks.register :site, :post_write do |site|
+  config = site.config["post_process"]
+  next unless config
+
+  terser = config["terser"]
+  if terser.is_a?(Hash)
+    terser.each do |terser_output, terser_inputs|
+      next unless terser_output.is_a?(String) && terser_inputs.is_a?(Array)
+
+      terser_codes = []
+      terser_inputs_all_exist = true
+      terser_inputs.each do |file|
+        destination = File.join(site.dest, file)
+        if File.exist?(destination)
+          terser_codes << File.read(destination, encoding: "UTF-8")
+        else
+          terser_inputs_all_exist = false
+          break
+        end
+      end
+
+      if terser_inputs_all_exist
+        destination = File.join(site.dest, terser_output.to_s)
+        File.write(destination, Terser.compile(terser_codes.join(";")))
+        Jekyll.logger.info "Post Process:", "terser #{terser_output}"
+      end
+    end
+  end
+
+  remove_files = config["remove_files"]
+  if remove_files.is_a?(Array)
+    remove_files.each do |file|
+      destination = File.join(site.dest, file)
+      File.delete(destination) if File.exist?(destination)
+      Jekyll.logger.info "Post Process:", "remove_files #{file}"
+    end
+  end
+
+  remove_dirs = config["remove_dirs"]
+  if remove_dirs.is_a?(Array)
+    remove_dirs.each do |dir|
+      destination = File.join(site.dest, dir)
+      FileUtils.rm_rf(destination) if File.directory?(destination)
+      Jekyll.logger.info "Post Process:", "remove_dirs #{dir}"
+    end
+  end
+end