source/splitfx: restart source on YAML modifications

Since splitfx YAML files are intended to be frequently edited and
modified by the user, we'll support automatically restarting the
source when the user saves changes via their favorite $EDITOR

This change is only for Linux users.  However, sleepy_penguin
supports kqueue nowadays so a patch to support such functionality
would be appreciated.

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/dtas/player.rb b/lib/dtas/player.rb
index 0ae8cef..ea48926 100644
--- a/lib/dtas/player.rb
+++ b/lib/dtas/player.rb
@@ -385,6 +385,7 @@ class DTAS::Player # :nodoc:
   end
 
   def next_source(source_spec)
+    @current.respond_to?(:watch_end) and @current.watch_end(@srv)
     @current = nil
     if source_spec
       case source_spec
@@ -413,6 +414,12 @@ class DTAS::Player # :nodoc:
       dst = @sink_buf
       pending.dst_assoc(dst)
       pending.spawn(@format, @rg, out: dst.wr, in: "/dev/null")
+
+      # watch and restart on modifications
+      pending.respond_to?(:watch_begin) and
+        @srv.wait_ctl(pending.watch_begin(method(:__current_requeue)),
+                      :wait_readable)
+
       @current = pending
       @srv.wait_ctl(dst, :wait_readable)
       wall(msg)