generate-media-files.rb: Assert Ogg is in sync with FLAC

1 files changed, 12 insertions, 0 deletions

diff --git a/_plugins/generate-media-files.rb b/_plugins/generate-media-files.rb
index 2ef92db..388168c 100644
--- a/_plugins/generate-media-files.rb
+++ b/_plugins/generate-media-files.rb
@@ -9,11 +9,23 @@ module Jekyll
         slug = document.data['slug']
         flac = "resources/podcasts/#{date}-#{slug}.flac"
         ogg =  "resources/podcasts/#{date}-#{slug}.ogg"
+
         unless File.exist? ogg then
           puts "Missing '#{ogg}' file, generating..."
           puts `ffmpeg -i #{flac} -ar 48000 -vn -c:a libvorbis -b:a 320k #{ogg}`
           site.static_files << Jekyll::StaticFile.new(site, site.source, '', ogg)
         end
+
+        checksum_file = "#{ogg}.checksum"
+        checksum = `sha256sum #{flac} #{ogg} | sha256sum | awk '{ print $1 }'`
+        if File.exist? checksum_file then
+          unless checksum == File.read(checksum_file)
+            raise "Checksum mismatch for '#{flac}'.\nRe-generate the Ogg files and checksums with:\n\nrm '#{ogg}' '#{checksum_file}'"
+          end
+        else
+          puts "Missing checksum for '#{flac}', generating..."
+          File.write(checksum_file, checksum)
+        end
       end
     end
   end