work in progress to improve help

git-svn-id: svn://svn.berlios.de/openocd/trunk@792 b42882b7-edfa-0310-969c-e2dbd0fdcd60

src/helper/Makefile.am

@@ -1,4 +1,4 @@
-INCLUDES = $(all_includes)
+INCLUDES = -I$(top_srcdir)/src $(all_includes)
 METASOURCES = AUTO
 AM_CPPFLAGS = -DPKGDATADIR=\"$(pkgdatadir)\" -DPKGLIBDIR=\"$(pkglibdir)\" @CPPFLAGS@
 noinst_LIBRARIES = libhelper.a

src/helper/command.c

@@ -38,6 +38,8 @@
 #include <stdio.h>
 #include <unistd.h>
 
+#include <openocd_tcl.h>
+
 int fast_and_dangerous = 0;
 
 void command_print_help_line(command_context_t* context, struct command_s *command, int indent);
@@ -65,10 +67,9 @@ command_t* register_command(command_context_t *context, command_t *parent, char
 	c->children = NULL;
 	c->handler = handler;
 	c->mode = mode;
-	if (help)
+	if (!help)
+		help="";
 	c->help = strdup(help);
-	else
-		c->help = NULL;
 	c->next = NULL;
 	
 	/* place command in tree */
@@ -100,7 +101,22 @@ command_t* register_command(command_context_t *context, command_t *parent, char
 			context->commands = c;
 		}
 	}
+	/* accumulate help text in Tcl helptext list.  */
+    Jim_Obj *helptext=Jim_GetGlobalVariableStr(interp, "ocd_helptext", JIM_ERRMSG);
+	Jim_Obj *cmd_entry=Jim_NewListObj(interp, NULL, 0);
 	
+	Jim_Obj *cmd_list=Jim_NewListObj(interp, NULL, 0);
+
+	/* maximum of two levels :-) */
+	if (c->parent!=NULL)
+	{
+		Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, c->parent->name, -1));
+	} 
+	Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, c->name, -1));
+	
+	Jim_ListAppendElement(interp, cmd_entry, cmd_list);
+	Jim_ListAppendElement(interp, cmd_entry, Jim_NewStringObj(interp, c->help, -1));
+	Jim_ListAppendElement(interp, helptext, cmd_entry);
 	return c;
 }
 

src/helper/configuration.c

@@ -106,6 +106,7 @@ FILE *open_file_from_path (char *file, char *mode)
 
 int parse_config_file(struct command_context_s *cmd_ctx)
 {
+	int retval;
 	char **cfg;
 
 	if (!config_file_names)
@@ -115,7 +116,9 @@ int parse_config_file(struct command_context_s *cmd_ctx)
 
 	while (*cfg)
 	{
-		command_run_line(cmd_ctx, *cfg);
+		retval=command_run_line(cmd_ctx, *cfg);
+		if (retval!=ERROR_OK)
+			return retval;
 		cfg++;
 	}
 

src/openocd.c

@@ -697,10 +697,22 @@ static char* openocd_jim_fgets(char *s, int size, void *cookie)
 void add_jim(const char *name, int (*cmd)(Jim_Interp *interp, int argc, Jim_Obj *const *argv), const char *help)
 {
 	Jim_CreateCommand(interp, name, cmd, NULL, NULL);
-	/* FIX!!! add scheme to accumulate help! */
 	
+	/* FIX!!! it would be prettier to invoke add_help_text... 
+	accumulate help text in Tcl helptext list.  */
+    Jim_Obj *helptext=Jim_GetGlobalVariableStr(interp, "ocd_helptext", JIM_ERRMSG);
+	Jim_Obj *cmd_entry=Jim_NewListObj(interp, NULL, 0);
+	
+	Jim_Obj *cmd_list=Jim_NewListObj(interp, NULL, 0);
+	Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, name, -1));
+	
+	Jim_ListAppendElement(interp, cmd_entry, cmd_list);
+	Jim_ListAppendElement(interp, cmd_entry, Jim_NewStringObj(interp, help, -1));
+	Jim_ListAppendElement(interp, helptext, cmd_entry);
 }
 
+extern const unsigned char filedata_startup[];
+
 void initJim(void)
 {
 	Jim_CreateCommand(interp, "openocd", Jim_Command_openocd, NULL, NULL);
@@ -719,13 +731,9 @@ void initJim(void)
 	interp->cb_vfprintf = openocd_jim_vfprintf;
 	interp->cb_fflush = openocd_jim_fflush;
 	interp->cb_fgets = openocd_jim_fgets;
-}
 	
-extern const unsigned char filedata_startup[];
+	add_default_dirs();
 	
-/* after command line parsing */
-void initJim2(void)
-{
 	if (Jim_Eval(interp, filedata_startup)==JIM_ERR)
 	{
 		LOG_ERROR("Failed to run startup.tcl (embedded into OpenOCD compile time)");
@@ -735,6 +743,7 @@ void initJim2(void)
 }
 
 
+
 int handle_script_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
 	FILE *script_file;
@@ -825,9 +834,6 @@ int openocd_main(int argc, char *argv[])
 	
 	active_cmd_ctx=cfg_cmd_ctx;
 	
-	add_default_dirs();
-
-	initJim2();
 
 	if (parse_cmdline_args(cfg_cmd_ctx, argc, argv) != ERROR_OK)
 		return EXIT_FAILURE;

src/startup.tcl

@@ -5,6 +5,20 @@
 # Embedded into OpenOCD executable
 #
 
+
+# Help text list. A list of command + help text pairs.
+#
+# Commands can be more than one word and they are stored
+# as "flash banks" "help text x x x"
+
+global ocd_helptext
+set ocd_helptext {}
+
+proc add_help_text {cmd cmd_help} {
+	global ocd_helptext
+	lappend ocd_helptext [list $cmd $cmd_help]
+}
+
 # Production command
 # FIX!!! need to figure out how to feed back relevant output
 # from e.g. "flash banks" command...
@@ -48,6 +62,20 @@ proc flash args {
 	openocd_throw "flash $args"
 }
 
+#Print help text for a command
+proc tcl_help {args} {
+	global ocd_helptext
+	set cmd $args
+	foreach a [lsort $ocd_helptext] {
+		if {[string length $cmd]==0||[string first $cmd $a]!=-1} {
+			puts [format "%18s - %s" [lindex $a 0] [lindex $a 1]]
+		}
+	}
+}
+
+add_help_text tcl_help "Tcl implementation of help command"
+
+
 # If a fn is unknown to Tcl, we try to execute it as an OpenOCD command
 proc unknown {args} {
 	if {[string length $args]>0} {