Add rewrite_ignore option to asset_hash extension.

This allows for configuring the files that will be skipped when
performing URL rewriting on the file content. This differs from the
existing `ignore` option, which configures the files that won't have
hashes added to the filename.

middleman-core/features/asset_hash.feature

@@ -203,6 +203,45 @@ Feature: Assets get file hashes appended to them and references to them are upda
       | javascripts/application-1d8d5276.js |
       | stylesheets/site-7474cadd.css |
 
+  Scenario: Hashed-asset files are not replaced for rewrite ignored paths
+    Given a fixture app "asset-hash-app"
+    And a file named "config.rb" with:
+      """
+      is_stylesheet = proc { |path| path.start_with? '/stylesheets' }
+      activate :asset_hash, rewrite_ignore: [
+        %r(javascripts/*),
+        '/subdir/*',
+        is_stylesheet
+      ]
+      activate :relative_assets
+      activate :directory_indexes
+      """
+    And a successfully built app at "asset-hash-app"
+    When I cd to "build"
+    Then the following files should exist:
+      | index.html |
+      | subdir/index.html |
+      | images/100px-5fd6fb90.jpg |
+      | javascripts/application-1d8d5276.js |
+      | stylesheets/site-8bc55985.css |
+    And the following files should not exist:
+      | images/100px.jpg |
+      | javascripts/application.js |
+      | stylesheets/site.css |
+    And the file "javascripts/application-1d8d5276.js" should contain "img.src = '/images/100px.jpg'"
+    And the file "stylesheets/site-8bc55985.css" should contain:
+      """
+      background-image: url("../images/100px.jpg")
+      """
+    And the file "index.html" should contain 'href="stylesheets/site-8bc55985.css"'
+    And the file "index.html" should contain 'src="javascripts/application-1d8d5276.js"'
+    And the file "index.html" should contain 'src="images/100px-5fd6fb90.jpg"'
+    And the file "subdir/index.html" should contain:
+      """
+      <h2>Image url3:</h2>
+      <p><img src="../images/100px.jpg"></p>
+      """
+
   Scenario: Already minified files should still be hashed
     Given a successfully built app at "asset-hash-minified-app"
     When I cd to "build"

middleman-core/lib/middleman-core/extensions/asset_hash.rb

@@ -5,6 +5,7 @@ require 'middleman-core/rack'
 class Middleman::Extensions::AssetHash < ::Middleman::Extension
   option :exts, %w(.jpg .jpeg .png .gif .webp .js .css .otf .woff .woff2 .eot .ttf .svg .svgz), 'List of extensions that get asset hashes appended to them.'
   option :ignore, [], 'Regexes of filenames to skip adding asset hashes to'
+  option :rewrite_ignore, [], 'Regexes of filenames to skip processing for path rewrites'
 
   def initialize(app, options_hash={}, &block)
     super
@@ -23,6 +24,7 @@ class Middleman::Extensions::AssetHash < ::Middleman::Extension
             url_extensions: options.exts.sort.reverse,
             source_extensions: %w(.htm .html .php .css .js),
             ignore: @ignore,
+            rewrite_ignore: options.rewrite_ignore,
             middleman_app: app,
             proc: method(:rewrite_url)
   end

middleman-core/lib/middleman-core/middleware/inline_url_rewriter.rb

@@ -34,13 +34,16 @@ module Middleman
         @source_exts_regex_text = Regexp.union(@source_exts).to_s
 
         @ignore = options.fetch(:ignore)
+        @rewrite_ignore = Array(options.fetch(:rewrite_ignore, []))
       end
 
       def call(env)
         status, headers, response = @rack_app.call(env)
 
-        # Allow upstream request to skip all rewriting
+        # Allow configuration or upstream request to skip all rewriting
-        return [status, headers, response] if env['bypass_inline_url_rewriter'] == 'true'
+        if rewrite_ignore?(env['PATH_INFO']) || env['bypass_inline_url_rewriter'] == 'true'
+          return [status, headers, response]
+        end
 
         # Allow upstream request to skip this specific rewriting
         if @uid
@@ -96,6 +99,11 @@ module Middleman
           false
         end
       end
+
+      Contract String => Bool
+      def rewrite_ignore?(path)
+        @rewrite_ignore.any? { |ignore| Middleman::Util.path_match(ignore, path) }
+      end
     end
   end
 end