player: expire sox metadata cache on file st_ctime changes

We still need the TTL to deal with fuse.sshfs and maybe other weird
FSes which don't return the st_ctime properly.

1 files changed, 12 insertions, 1 deletions

diff --git a/lib/dtas/mcache.rb b/lib/dtas/mcache.rb
index 4f1e9e8..e0a39af 100644
--- a/lib/dtas/mcache.rb
+++ b/lib/dtas/mcache.rb
@@ -13,14 +13,25 @@ class DTAS::Mcache
 
   def lookup(infile)
     bucket = infile.hash & @mask
+    st = nil
     if cur = @tbl[bucket]
       if cur[:infile] == infile && (DTAS.now - cur[:btime]) < @ttl
-        return cur
+        begin
+          st = File.stat(infile)
+          return cur if cur[:ctime] == st.ctime
+        rescue
+        end
       end
     end
     return unless block_given?
     @tbl[bucket] = begin
       cur = cur ? cur.clear : {}
+      begin
+        st ||= File.stat(infile)
+        cur[:ctime] = st.ctime
+      rescue
+        return
+      end
       if ret = yield(infile, cur)
         ret[:infile] = infile.frozen? ? infile : -(infile.dup)
         ret[:btime] = DTAS.now