如何通过 Monkey-Patch Rails 来使用 Gulp-rev-all Manifest.json？

Question

我正在使用 Rails 4.2，Ruby 2.2

我使用以下方法生成了一个新应用：rails new app --skip-sprockets

我所有的 Gulp 任务都成功运行（其中很多：从 gulp-changed 和 gulp-livereload 到 gulp-minify -css, gulp-uncss 等).

使用 gulp-rev-all 我能够使用 MD5 指纹命名约定生成所有资产。

它们已正确保存到 rev-manifest.json

app/assets/rev-manifest.json:

{
  "rev-manifest.json": "rev-manifest.9680cee8.json",
  "images/measurement.png": "images/measurement.cedb4145.png",
  "images/measurement2.png": "images/measurement2.cedb4145.png",
  "scripts/chachin.js": "scripts/chachin.5f30b461.js",
  "stylesheets/chachin.scss": "stylesheets/chachin.4c7c499d.scss"
}

app/helpers/application_helper.rb

module ApplicationHelper

  def stylesheet_link_tag(url, options={})
    url = AssetManifest.stylesheet_path(url)

    super(url, options)
  end

  def crossorigin_javascript_include_tag(url, options={})
    url = AssetManifest.javascript_path(url)

    super(url, options)
  end

  def image_tag(url, options={})
    url = AssetManifest.asset_path(url)

    super(url, options)
  end

  def image_path(url, options={})
    url = AssetManifest.asset_path(url)

    super(url, options)
  end

  def image_url(url, options={})
    url = AssetManifest.asset_path(url)

    super((ActionController::Base.asset_host || "") + url, options)
  end

end

config/initializers/asset_manifest.rb

class AssetManifest

  def self.manifest
    if File.exists?("app/assets/rev-manifest.json")
      @manifest ||= JSON.parse(File.read("app/assets/rev-manifest.json"))
    end
  end

  def self.stylesheet_path(url)
    if AssetManifest.manifest
      url += ".css" unless url.end_with?(".css")
      AssetManifest.manifest[url] || url
    else
      url
    end
  end

  def self.javascript_path(url)
    if AssetManifest.manifest
      url += ".js" unless url.end_with?(".js")
      AssetManifest.manifest[url] || url
    else
      url
    end
  end

  def self.asset_path(url)
    if AssetManifest.manifest
      AssetManifest.manifest[url] || url
    else
      url
    end
  end
end

我是不是漏掉了什么？

Answer 1

将 Rails.root 合并到资产清单文件的路径中可能是个好主意。

这是我所做的：

config/initializers/asset_manifest.rb

class AssetManifest

  MANIFEST_FILE = "rev-manifest.json"

  class << self

    def manifest
      @manifest ||= read_manifest(manifest_file_path)
    end

    def stylesheet_path(url)
      url += ".css" unless url.end_with?(".css")
      AssetManifest.manifest[url] || url
    end

    def javascript_path(url)
      url += ".js" unless url.end_with?(".js")
      AssetManifest.manifest[url] || url
    end

    def asset_path(url)
      AssetManifest.manifest[url] || url
    end

    private

    def manifest_file_path
      File.join(Rails.root, "app", "assets", MANIFEST_FILE)
    end

    def read_manifest(path)
      if File.exists?(path)
        JSON.parse(File.read(manifest_file_path))
      else
        {}
      end
    end

  end
end

向 https://bugsnag.com/blog/replacing-the-rails-asset-pipeline-with-gulp 致敬，了解如何使用 gulp 而不是链轮作为资产管道的精彩介绍。

如何通过 Monkey-Patch Rails 来使用 Gulp-rev-all Manifest.json？

How to Monkey-Patch Rails to use Gulp-rev-all Manifest.json?

ruby-on-rails

asset-pipeline

ruby-on-rails-4

gulp

gulp-rev