feat(paths): allow assets to be found using their non digested path

lib/propshaft/asset.rb

@@ -2,10 +2,15 @@
 require "action_dispatch/http/mime_type"
 
 class Propshaft::Asset
+  PREDIGESTED_REGEX = /-([0-9a-zA-Z]{7,128}\.digested)/
+
   attr_reader :path, :logical_path, :version
 
   def initialize(path, logical_path:, version: nil)
-    @path, @logical_path, @version = path, Pathname.new(logical_path), version
+    @path         = path
+    @digest       = logical_path.to_s[PREDIGESTED_REGEX, 1]
+    @logical_path = Pathname.new(@digest ? logical_path.sub("-#{@digest}", "") : logical_path)
+    @version      = version
   end
 
   def content
@@ -25,23 +30,14 @@ def digest
   end
 
   def digested_path
-    if already_digested?
-      logical_path
-    else
-      logical_path.sub(/\.(\w+)$/) { |ext| "-#{digest}#{ext}" }
-    end
+    logical_path.sub(/\.(\w+)$/) { |ext| "-#{digest}#{ext}" }
   end
 
   def fresh?(digest)
-    self.digest == digest || already_digested?
+    self.digest == digest
   end
 
   def ==(other_asset)
     logical_path.hash == other_asset.logical_path.hash
   end
-
-  private
-    def already_digested?
-      logical_path.to_s =~ /-([0-9a-zA-Z]{7,128})\.digested/
-    end
 end

lib/propshaft/load_path.rb

@@ -48,7 +48,8 @@ def assets_by_path
         paths.each do |path|
           without_dotfiles(all_files_from_tree(path)).each do |file|
             logical_path = file.relative_path_from(path)
-            mapped[logical_path.to_s] ||= Propshaft::Asset.new(file, logical_path: logical_path, version: version)
+            asset = Propshaft::Asset.new(file, logical_path: logical_path, version: version)
+            mapped[asset.logical_path.to_s] ||= asset
           end if path.exist?
         end
       end

lib/propshaft/output_path.rb

@@ -42,7 +42,7 @@ def fresh_version_within_limit(mtime, count, expires_at:, limit:)
       modified_at = [ 0, Time.now - mtime ].max
       modified_at < expires_at || limit < count
     end
-  
+
     def remove(path)
       FileUtils.rm(@path.join(path))
       Propshaft.logger.info "Removed #{path}"

lib/propshaft/server.rb

@@ -11,8 +11,8 @@ def call(env)
     if (asset = @assembly.load_path.find(path)) && asset.fresh?(digest)
       compiled_content = @assembly.compilers.compile(asset)
 
-      [ 
-        200, 
+      [
+        200,
         {
           "Content-Length"  => compiled_content.length.to_s,
           "Content-Type"    => asset.content_type.to_s,
@@ -34,7 +34,7 @@ def inspect
   private
     def extract_path_and_digest(env)
       full_path = Rack::Utils.unescape(env["PATH_INFO"].to_s.sub(/^\//, ""))
-      digest    = full_path[/-([0-9a-zA-Z]{7,128})\.(?!digested)[^.]+\z/, 1]
+      digest    = full_path[/-([0-9a-zA-Z]{7,128}(?:\.digested)?)\.[^.]+\z/, 1]
       path      = digest ? full_path.sub("-#{digest}", "") : full_path
 
       [ path, digest ]

test/propshaft/asset_test.rb

@@ -25,7 +25,8 @@ class Propshaft::AssetTest < ActiveSupport::TestCase
     assert find_asset("one.txt").fresh?("f2e1ec14d6856e1958083094170ca6119c529a73")
     assert_not find_asset("one.txt").fresh?("e206c34fe404c8e2f25d60dd8303f61c02b8d381")
 
-    assert find_asset("file-already-abcdefVWXYZ0123456789.digested.css").fresh?(nil)
+    assert find_asset("file-already-abcdefVWXYZ0123456789.digested.css").fresh?("abcdefVWXYZ0123456789.digested")
+    assert_not find_asset("file-already-abcdefVWXYZ0123456789.digested.css").fresh?(nil)
   end
 
   test "digested path" do
@@ -35,9 +36,6 @@ class Propshaft::AssetTest < ActiveSupport::TestCase
     assert_equal "file-already-abcdefVWXYZ0123456789.digested.css",
       find_asset("file-already-abcdefVWXYZ0123456789.digested.css").digested_path.to_s
 
-    assert_equal "file-already-abcdefVWXYZ0123456789.digested.debug.css",
-      find_asset("file-already-abcdefVWXYZ0123456789.digested.debug.css").digested_path.to_s
-
     assert_equal "file-not.digested-e206c34fe404c8e2f25d60dd8303f61c02b8d381.css",
       find_asset("file-not.digested.css").digested_path.to_s
   end

test/propshaft/load_path_test.rb

@@ -39,6 +39,7 @@ class Propshaft::LoadPathTest < ActiveSupport::TestCase
   test "manifest" do
     @load_path.manifest.tap do |manifest|
       assert_equal "one-f2e1ec14d6856e1958083094170ca6119c529a73.txt", manifest["one.txt"]
+      assert_equal "file-already-abcdefVWXYZ0123456789.digested.css", manifest["file-already.css"]
       assert_equal "nested/three-6c2b86a0206381310375abdd9980863c2ea7b2c3.txt", manifest["nested/three.txt"]
     end
   end

test/propshaft/server_test.rb

@@ -30,7 +30,7 @@ class Propshaft::ServerTest < ActiveSupport::TestCase
   end
 
   test "serve a predigested file" do
-    asset = @assembly.load_path.find("file-already-abcdefVWXYZ0123456789.digested.css")
+    asset = @assembly.load_path.find("file-already.css")
     get "/#{asset.digested_path}"
     assert_equal 200, last_response.status
   end