Configure previewer/analyzer command paths centrally

2 files changed, 8 insertions, 4 deletions

diff --git a/activestorage/lib/active_storage/previewer/pdf_previewer.rb b/activestorage/lib/active_storage/previewer/pdf_previewer.rb
index b84aefcc9c..426ff51eb1 100644
--- a/activestorage/lib/active_storage/previewer/pdf_previewer.rb
+++ b/activestorage/lib/active_storage/previewer/pdf_previewer.rb
@@ -2,8 +2,6 @@
 
 module ActiveStorage
   class Previewer::PDFPreviewer < Previewer
-    class_attribute :mutool_path, default: "mutool"
-
     def self.accept?(blob)
       blob.content_type == "application/pdf"
     end
@@ -20,5 +18,9 @@ module ActiveStorage
       def draw_first_page_from(file, &block)
         draw mutool_path, "draw", "-F", "png", "-o", "-", file.path, "1", &block
       end
+
+      def mutool_path
+        ActiveStorage.paths[:mutool] || "mutool"
+      end
   end
 end
diff --git a/activestorage/lib/active_storage/previewer/video_previewer.rb b/activestorage/lib/active_storage/previewer/video_previewer.rb
index 5d06e33f44..2f28a3d341 100644
--- a/activestorage/lib/active_storage/previewer/video_previewer.rb
+++ b/activestorage/lib/active_storage/previewer/video_previewer.rb
@@ -2,8 +2,6 @@
 
 module ActiveStorage
   class Previewer::VideoPreviewer < Previewer
-    class_attribute :ffmpeg_path, default: "ffmpeg"
-
     def self.accept?(blob)
       blob.video?
     end
@@ -21,5 +19,9 @@ module ActiveStorage
         draw ffmpeg_path, "-i", file.path, "-y", "-vcodec", "png",
           "-vf", "thumbnail", "-vframes", "1", "-f", "image2", "-", &block
       end
+
+      def ffmpeg_path
+        ActiveStorage.paths[:ffmpeg] || "ffmpeg"
+      end
   end
 end