make command support optional

In a noninveractive environment we do not need commands. So make
them optional.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands/Kconfig

@@ -1,7 +1,14 @@
 config REGINFO
 	bool
 
-menu "Commands                      "
+config COMMAND_SUPPORT
+	bool
+	depends on !SHELL_NONE
+	default y
+
+if COMMAND_SUPPORT
+
+menu "commands                      "
 
 menu "scripting                     "
 
@@ -404,3 +411,5 @@ config CMD_USB
 	  The usb command allows to rescan for USB devices.
 
 endmenu
+
+endif

common/Kconfig

@@ -223,6 +223,7 @@ choice
 	config SHELL_HUSH
 		bool "hush parser"
 		select ENVIRONMENT_VARIABLES
+		select COMMAND_SUPPORT
 		help
 		  Enable hush support. This is the most advanced shell available
 		  for barebox.
@@ -230,6 +231,7 @@ choice
 	config SHELL_SIMPLE
 		bool "Simple parser"
 		select ENVIRONMENT_VARIABLES
+		select COMMAND_SUPPORT
 		help
 		  simple shell. No if/then, no return values from commands, no loops
 endchoice

common/Makefile

@@ -11,7 +11,7 @@ obj-$(CONFIG_BLOCK)		+= block.o
 obj-y += dlmalloc.o
 obj-y += clock.o
 obj-y += version.o
-obj-y += command.o
+obj-$(CONFIG_COMMAND_SUPPORT) += command.o
 obj-$(CONFIG_CONSOLE_FULL) += console.o
 obj-$(CONFIG_CONSOLE_SIMPLE) += console_simple.o
 obj-$(CONFIG_DIGEST) += digest.o

common/startup.c

@@ -118,7 +118,9 @@ void start_barebox (void)
 {
 	initcall_t *initcall;
 	int result;
+#ifdef CONFIG_COMMAND_SUPPORT
 	struct stat s;
+#endif
 
 #ifdef CONFIG_HAS_EARLY_INIT
 	/* We are running from RAM now, copy early initdata from
@@ -150,6 +152,7 @@ void start_barebox (void)
 #endif
 	}
 #endif
+#ifdef CONFIG_COMMAND_SUPPORT
 	printf("running /env/bin/init...\n");
 
 	if (!stat("/env/bin/init", &s)) {
@@ -157,7 +160,7 @@ void start_barebox (void)
 	} else {
 		printf("not found\n");
 	}
-
+#endif
 	/* main_loop() can return to retry autoboot, if so just run it again. */
 	for (;;)
 		run_shell();