jekyll-tailwind.rb in jekyll-tailwind-2.0

- old
+ new
@@ -1,14 +1,62 @@
 # frozen_string_literal: true
 
 require_relative "jekyll-tailwind/version"
-require_relative "jekyll-tailwind/installer"
 
 require "jekyll"
+require "tailwindcss/ruby"
 
+module Jekyll
+  class Tailwind
+
+    def initialize(config)
+      if config["config_path"]
+        Jekyll.logger.warn "WARNING: The `config_path` option is deprecated and will be removed in the next releases. Please use the `config` option instead."
+      end
+      if config["version"]
+        Jekyll.logger.warn "WARNING: The `version` option has no effect, version could be managed through 'tailwindcss-ruby' gem in you're Gemfile."
+      end
+
+      @config = config["config_path"] || config["config"] || "tailwind.config.js"
+      @postcss = config.fetch("postcss", "postcss.config.js")
+      @inputs = Array.wrap(config["input"])
+      @output = config.fetch("output", "_site/assets/css/app.css")
+      @minify = config.fetch("minify", false)
+    end
+
+    def compile
+      command = [
+                Tailwindcss::Ruby.executable,
+                "--output", @output,
+                "--config", @config,
+              ]
+
+      @inputs.each do |input|
+        # There could be multiple input files or non at all.
+        command += ["--input", input]
+      end
+
+      command += ["--minify"] if @minify
+      command += ["--postcss", @postcss] if File.exist?(@postcss)
+
+      `#{command.join(' ')}`
+    end
+  end
+end
+
+class Array
+  # Taken from rails/activesupport/lib/active_support/core_ext/array/wrap.rb
+  def self.wrap(object)
+    if object.nil?
+      []
+    elsif object.respond_to?(:to_ary)
+      object.to_ary || [object]
+    else
+      [object]
+    end
+  end
+end
+
+# It's important to run TailwindCSS compilation after Jekyll has finished with build steps. TailwindCSS will analyse resulting HTML and produce a CSS file with attributes that are actually in use, this is done to produce a smaller CSS file.
 Jekyll::Hooks.register [:site], :post_write do |site|
-  tailwind = Jekyll::Tailwind::Installer.new(
-    version: site.config.dig("tailwind", "version"),
-    config_path: site.config.dig("tailwind", "config_path")
-  )
-  tailwind.install_and_run
+  Jekyll::Tailwind.new(site.config.fetch('tailwind', {})).compile
 end