Added completion for generated cli leafrefs for both absolute and relatve paths.

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Clixon CHANGELOG
 
-- Added validation for leafref forward and nackward references.
+- Added completion for generated cli leafrefs for both absolute and relatve paths.
+
+- Added validation for leafref forward and backward references.
 	
 - Added new backend plugin callback: "plugin_statedata()" for retreiving state data
 

apps/cli/cli_main.c

@@ -297,7 +297,8 @@ main(int argc, char **argv)
 	    char *dir = dirname(str);
 	    hash_del(clicon_options(h), (char*)"CLICON_YANG_MODULE_REVISION");
 	    clicon_option_str_set(h, "CLICON_YANG_MODULE_MAIN", basename(optarg));
-	    clicon_option_str_set(h, "CLICON_YANG_DIR", strdup(dir));
+	    clicon_option_str_set(h, "CLICON_YANG_DIR", dir);
+	    free(str);
 	    break;
 	}
 	default:

apps/cli/cli_show.c

@@ -112,12 +112,24 @@ expand_dbvar(void   *h,
     int              j;
     int              k;
     cg_var          *cv;
+    yang_spec       *yspec;
+    cxobj           *xtop = NULL; /* xpath root */
+    cxobj           *xbot = NULL; /* xpath, NULL if datastore */
+    yang_node       *y = NULL; /* yang spec of xpath */
+    yang_stmt       *ytype;
+    yang_stmt       *ypath;
+    cxobj           *xcur;
+    char            *xpathcur;
 
     if (argv == NULL || cvec_len(argv) != 2){
 	clicon_err(OE_PLUGIN, 0, "%s: requires arguments: <db> <xmlkeyfmt>",
 		   __FUNCTION__);
 	goto done;
     }
+    if ((yspec = clicon_dbspec_yang(h)) == NULL){
+	clicon_err(OE_FATAL, 0, "No DB_SPEC");
+	goto done;
+    }
     if ((cv = cvec_i(argv, 0)) == NULL){
 	clicon_err(OE_PLUGIN, 0, "%s: Error when accessing argument <db>");
 	goto done;
@@ -141,34 +153,46 @@ expand_dbvar(void   *h,
     if (api_path_fmt2xpath(api_path, cvv, &xpath) < 0)
 	goto done;   
     /* XXX read whole configuration, why not send xpath? */
-    if (clicon_rpc_get_config(h, dbstr, xpath, &xt) < 0)
+    if (clicon_rpc_get_config(h, dbstr, "/", &xt) < 0)
     	goto done;
     if ((xerr = xpath_first(xt, "/rpc-error")) != NULL){
 	clicon_rpc_generate_error(xerr);
 	goto done;
     }
-#if 0
-    /* Get xpath from datastore? 
-     * 1. Get whole datastore, 
-     * 2. Add tentative my location to xpath, 
-     * 3. If leafref, compute relative xpath
+    xcur = xt; /* default top-of-tree */
+    xpathcur = xpath;
+    /* Create config top-of-tree */
+    if ((xtop = xml_new("config", NULL)) == NULL)
+	goto done;
+    xbot = xtop;
+    if (api_path && api_path2xml(api_path, yspec, xtop, &xbot, &y) < 0)
+	goto done;
+    /* Special case for leafref. Detect leafref via Yang-type, 
+     * Get Yang path element, tentatively add the new syntax to the whole
+     * tree and apply the path to that.
+     * Last, the reference point for the xpath code below is changed to 
+     * the point of the tentative new xml.
+     * Here the whole syntax tree is loaded, and it would be better to offload
+     * such operations to the datastore by a generic xpath function.
      */
-    {
-	cxobj     *xcur = NULL; /* xpath, NULL if datastore */
-	//	yang_node *y = NULL; /* yang spec of xpath */
-
-	if ((xcur = xpath_first(xt, xpath)) == NULL)
-	    goto done;
-	
-
-    }
-#endif
-
+    if ((ytype = yang_find((yang_node*)y, Y_TYPE, NULL)) != NULL)
+	if (strcmp(ytype->ys_argument, "leafref")==0){
+	    if ((ypath = yang_find((yang_node*)ytype, Y_PATH, NULL)) == NULL){
+		clicon_err(OE_DB, 0, "Leafref %s requires path statement", ytype->ys_argument);
+		goto done;
+	    }
+	    xpathcur = ypath->ys_argument;
+	    if (xml_merge(xt, xtop, yspec) < 0)
+		goto done;
+	    if ((xcur = xpath_first(xt, xpath)) == NULL){
+		clicon_err(OE_DB, 0, "xpath %s should return merged content", xpath);
+		goto done;
+	    }
+	}
     /* One round to detect duplicates 
-     * XXX The code below would benefit from some cleanup
      */
     j = 0;
-    if (xpath_vec(xt, xpath, &xvec, &xlen) < 0) 
+    if (xpath_vec(xcur, xpathcur, &xvec, &xlen) < 0) 
 	goto done;
     for (i = 0; i < xlen; i++) {
 	char *str;
@@ -211,6 +235,8 @@ expand_dbvar(void   *h,
   done:
     if (xvec)
 	free(xvec);
+    if (xtop)
+	xml_free(xtop);
     if (xt)
 	xml_free(xt);
     if (xpath) 

test/test7.sh

@@ -37,14 +37,14 @@ module ietf-ip{
          }
          leaf address {
              type leafref {
-                 path "../../interface[name = current()/../ifname]"
+                 path "../../interface[name=eth0]"
                     + "/address/ip";
              }
          }
     }
 }
 EOF
-
+#                 path "../../interface[name = current()/../ifname]"
 
 # kill old backend (if any)
 new "kill old backend"