weston: deprecate enable_tap in favour of enable-tap

This is to increase consistency in config option naming in weston.ini.
(Prefer hyphens over underscores to separate words.)

If enable_tap is present in weston.ini, an obnoxious error message is
logged with weston_log(). In terms of configuration, if enable-tap is
present, enable_tap is ignored.

Signed-off-by: Eric Toombs <3672-ewtoombs@users.noreply.gitlab.freedesktop.org>

compositor/main.c

@@ -1464,19 +1464,25 @@ configure_input_device(struct weston_compositor *compositor,
 {
 	struct weston_config_section *s;
 	struct weston_config *config = wet_get_config(compositor);
+	int has_enable_tap = 0;
 	int enable_tap;
-	int enable_tap_default;
 
 	s = weston_config_get_section(config,
 				      "libinput", NULL, NULL);
 
 	if (libinput_device_config_tap_get_finger_count(device) > 0) {
-		enable_tap_default =
-			libinput_device_config_tap_get_default_enabled(
-				device);
-		weston_config_section_get_bool(s, "enable_tap",
-					       &enable_tap,
-					       enable_tap_default);
+		if (weston_config_section_get_bool(s, "enable_tap",
+						   &enable_tap, 0) == 0) {
+			weston_log("!!DEPRECATION WARNING!!: In weston.ini, "
+				   "enable_tap is deprecated in favour of "
+				   "enable-tap. Support for it may be removed "
+				   "at any time!");
+			has_enable_tap = 1;
+		}
+		if (weston_config_section_get_bool(s, "enable-tap",
+						   &enable_tap, 0) == 0)
+			has_enable_tap = 1;
+		if (has_enable_tap)
 			libinput_device_config_tap_set_enabled(device,
 							       enable_tap);
 	}

man/weston.ini.man

@@ -216,7 +216,7 @@ backend.
 .PP
 Available configuration are:
 .TP 7
-.BI "enable_tap=" true
+.BI "enable-tap=" true
 enables tap to click on touchpad devices
 .TP 7
 .BI "touchscreen_calibrator=" true

weston.ini.in

@@ -60,7 +60,7 @@ path=@libexecdir@/weston-keyboard
 #transform=flipped-90
 
 #[libinput]
-#enable_tap=true
+#enable-tap=true
 
 #[touchpad]
 #constant_accel_factor = 50