Clean up protocol building

Move protocols to a subdirectory, /protocols, and DRY the Makefile.

Makefile

@@ -4,22 +4,21 @@ CC = gcc
 CLIBS = -lwayland-client
 CFLAGS = $(CLIBS)
 
-EXT_SOURCE_PROTOCOL_IMPL = ext-image-capture-source-v1-protocol.c 
-EXT_SOURCE_PROTOCOL_HEADER = ext-image-capture-source-v1-protocol.h
-
-EXT_CAPTURE_PROTOCOL_IMPL = ext-image-copy-capture-v1-protocol.c 
-EXT_CAPTURE_PROTOCOL_HEADER = ext-image-copy-capture-v1-protocol.h
-
-EXT_TOPLEVEL_PROTOCOL_IMPL = ext-foreign-toplevel-list-v1-protocol.c 
-EXT_TOPLEVEL_PROTOCOL_HEADER = ext-foreign-toplevel-list-v1-protocol.h
-
 SRC = main.c
 OUT = screencap
 
-PROTOCOL_IMPLS = $(EXT_TOPLEVEL_PROTOCOL_IMPL) $(EXT_SOURCE_PROTOCOL_IMPL) $(EXT_CAPTURE_PROTOCOL_IMPL)
-PROTOCOL_HEADERS = $(EXT_TOPLEVEL_PROTOCOL_HEADER) $(EXT_SOURCE_PROTOCOL_HEADER) $(EXT_CAPTURE_PROTOCOL_HEADER)
+
+PROTOCOL_NAMES = $(foreach proto, $(wildcard protocols/*), $(notdir $(basename $(proto))))
+PROTOCOL_IMPLS = $(foreach proto, $(PROTOCOL_NAMES), $(addsuffix .prot.c,$(proto)))
+PROTOCOL_HEADERS = $(foreach proto, $(PROTOCOL_NAMES), $(addsuffix .prot.h,$(proto)))
 PROTOCOLS = $(PROTOCOL_IMPLS) $(PROTOCOL_HEADERS)
 
+%.prot.c: protocols/%.xml
+	wayland-scanner private-code $< $@
+
+%.prot.h: protocols/%.xml
+	wayland-scanner client-header $< $@
+
 all: $(OUT)
 
 clean:
@@ -29,21 +28,3 @@ clean:
 $(OUT): $(PROTOCOLS) $(SRC)
 	$(CC) $(PROTOCOL_IMPLS) $(SRC) $(CFLAGS) -o $(OUT)
 
-$(EXT_SOURCE_PROTOCOL_IMPL):
-	wayland-scanner private-code ./ext-image-capture-source-v1.xml $(EXT_SOURCE_PROTOCOL_IMPL)
-
-$(EXT_SOURCE_PROTOCOL_HEADER):
-	wayland-scanner client-header ./ext-image-capture-source-v1.xml $(EXT_SOURCE_PROTOCOL_HEADER)
-
-$(EXT_CAPTURE_PROTOCOL_IMPL):
-	wayland-scanner private-code ./ext-image-copy-capture-v1.xml $(EXT_CAPTURE_PROTOCOL_IMPL)
-
-$(EXT_CAPTURE_PROTOCOL_HEADER):
-	wayland-scanner client-header ./ext-image-copy-capture-v1.xml $(EXT_CAPTURE_PROTOCOL_HEADER)
-
-$(EXT_TOPLEVEL_PROTOCOL_IMPL):
-	wayland-scanner private-code ./ext-foreign-toplevel-list-v1.xml $(EXT_TOPLEVEL_PROTOCOL_IMPL)
-
-$(EXT_TOPLEVEL_PROTOCOL_HEADER):
-	wayland-scanner client-header ./ext-foreign-toplevel-list-v1.xml $(EXT_TOPLEVEL_PROTOCOL_HEADER)
-

main.c

@@ -7,8 +7,8 @@
 
 #include <wayland-client.h>
 
-#include "ext-image-capture-source-v1-protocol.h"
-#include "ext-image-copy-capture-v1-protocol.h"
+#include "ext-image-capture-source-v1.prot.h"
+#include "ext-image-copy-capture-v1.prot.h"
 
 #include "rif.h"