启用站点缓存

_config.yml

@@ -8,8 +8,8 @@
 # layouts_dir: _layouts
 # data_dir: _data
 # includes_dir: _includes
-# cache_dir: .jekyll-cache
-disable_disk_cache: true
+cache_dir: .jekyll-cache/v260615
+# disable_disk_cache: false
 sass:
   # sass_dir: _sass
   # minimal-mistakes

_plugins/post_process.rb

@@ -1,51 +1,77 @@
-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
+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_cache = Jekyll::Cache.new("PostProcess.Terser")
+    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 |terser_input|
+        destination = File.join(site.dest, terser_input)
+        if File.exist?(destination)
+          terser_codes << File.read(destination, encoding: "UTF-8")
+          Jekyll.logger.debug "Post Process:", "terser input loaded (#{terser_input})"
+        else
+          terser_inputs_all_exist = false
+          Jekyll.logger.warn "Post Process:", "terser skipped (#{terser_input} not found)"
+          break
+        end
+      end
+
+      if terser_inputs_all_exist
+        code = terser_codes.join(";")
+        code_hash = Digest::SHA256.hexdigest(code)
+        unless terser_cache.key?(code_hash)
+          terser_cache[code_hash] = Terser.compile(code)
+        end
+        destination = File.join(site.dest, terser_output.to_s)
+        File.write(destination, terser_cache[code_hash])
+        Jekyll.logger.info "Post Process:", "terser success (#{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
+
+  jekyll_cache_dir = File.dirname(site.cache_dir)
+  if File.basename(jekyll_cache_dir) == ".jekyll-cache"
+    current_cache_name = File.basename(site.cache_dir)
+    Dir.entries(jekyll_cache_dir).select do |entry|
+      next if entry == "." || entry == ".."
+      entry_path = File.join(jekyll_cache_dir, entry)
+      if File.file?(entry_path)
+        File.delete(entry_path)
+        Jekyll.logger.info "Post Process:", "clean_cache #{entry}"
+      elsif File.directory?(entry_path)
+        if entry < current_cache_name
+          FileUtils.rm_rf(entry_path)
+          Jekyll.logger.info "Post Process:", "clean_cache #{entry}"
+        end
+      end
+    end
+  end
+end