main,til_args: employ the stream, add --print-pipes

This is a rudimentary integration of the new til_stream_t into
rototiller.  If the stream is going to continue living in
til_fb_fragment_t, the fragmenters and other nested frame
scenarios likely need to be updated to copy the stream through to
make the pipes available to the nested renders.

--print-pipes dumps the values found at the pipes' driver taps
to stdout on every frame.

Right now there's no way to externally write these values, but
with --print-pipes you can already see where things are going and
it's a nice visibility tool for tapped variables in modules.

Only stars and plato tap variables presently, but that will
improve.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/til_args.h b/src/til_args.h
index d45b619..85d4d7b 100644
--- a/src/til_args.h
+++ b/src/til_args.h
@@ -11,6 +11,7 @@ typedef struct til_args_t {
 	unsigned	use_defaults:1;
 	unsigned	help:1;
 	unsigned	gogogo:1;
+	unsigned	print_pipes:1;
 } til_args_t;
 
 int til_args_parse(int argc, const char *argv[], til_args_t *res_args);