From feb06e7a93af3642d23cad951e2eaf544025f64a Mon Sep 17 00:00:00 2001
From: David Lamparter <equinox@diac24.net>
Date: Tue, 28 Apr 2020 15:19:24 +0200
Subject: [PATCH] lib/xref: add xrefs for DEFUNs

This allows grabbing a list of all DEFUNs and their help texts through
the xref extraction mechanics.

Signed-off-by: David Lamparter <equinox@diac24.net>
---
 lib/command.h       | 6 +++++-
 lib/command_graph.h | 2 ++
 lib/xref.h          | 2 ++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/command.h b/lib/command.h
index b002e79f09..6acaa450c2 100644
--- a/lib/command.h
+++ b/lib/command.h
@@ -239,7 +239,11 @@ struct cmd_node {
 		.attr = attrs,                                                 \
 		.daemon = dnum,                                                \
 		.name = #cmdname,                                              \
-	};
+		.xref = XREF_INIT(XREFT_DEFUN, NULL, #funcname),               \
+	};                                                                     \
+	XREF_LINK(cmdname.xref);                                               \
+	/* end */
+
 
 #define DEFUN_CMD_FUNC_DECL(funcname)                                          \
 	static int funcname(const struct cmd_element *, struct vty *, int,     \
diff --git a/lib/command_graph.h b/lib/command_graph.h
index 179e104a57..09824460e6 100644
--- a/lib/command_graph.h
+++ b/lib/command_graph.h
@@ -31,6 +31,7 @@
 #include "memory.h"
 #include "vector.h"
 #include "graph.h"
+#include "xref.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -105,6 +106,7 @@ struct cmd_element {
 		    struct cmd_token *[]);
 
 	const char *name; /* symbol name for debugging */
+	struct xref xref;
 };
 
 /* text for <cr> command */
diff --git a/lib/xref.h b/lib/xref.h
index 9b5bcffc01..29c68820fd 100644
--- a/lib/xref.h
+++ b/lib/xref.h
@@ -29,6 +29,8 @@ enum xref_type {
 	XREFT_THREADSCHED = 0x100,
 
 	XREFT_LOGMSG = 0x200,
+
+	XREFT_DEFUN = 0x300,
 };
 
 /* struct xref is the "const" part;  struct xrefdata is the writable part. */