Add mount-point aware code to cli_auto_show

Revert patch in xpath2canonical for mountpoints

apps/cli/cli_generate.c

@@ -109,7 +109,12 @@ You can see which CLISPEC it generates via clixon_cli -D 2:
 /* variable expand function */
 #define GENERATE_EXPAND_XMLDB "expand_dbvar"
 
-/*! Create cligen variable expand entry with xmlkey format string as argument
+/*! Create cligen variable expand entry with api-pathfmt format string as argument
+ *
+ * Add api-fmt as first argument to callback, eg:
+ *   /ex:table
+ * Then if mountpoint add special entry:
+ *   /ctrl:dev/ctrl:config
  * @param[in]  h      Clixon handle
  * @param[in]  ys     yang_stmt of the node at hand
  * @param[in]  cvtype Type of the cligen variable
@@ -1353,6 +1358,8 @@ yang2cli_post(clicon_handle h,
 
 /*! Generate clispec for all modules in yspec (except excluded)
  * 
+ * Called in cli main function for top-level yangs. But may also be called dynamically for
+ * mountpoints.
  * @param[in]  h         Clixon handle
  * @param[in]  yspec     Top-level Yang statement of type Y_SPEC
  * @param[in]  treename  Name of tree

apps/cli/cli_show.c

@@ -839,6 +839,7 @@ int cli_show_version(clicon_handle h,
  * @param[in]  cvv   Vector of variables from CLIgen command-line
  * @param[in]  argv  String vector of show options, format:
  *   <api_path_fmt>  Generated API PATH (this is added implicitly, not actually given in the cvv)
+ *  [<api-path-fmt>] Extra api-path from mount-point
  *   <dbname>        Name of datastore, such as "running"
  * -- from here optional:
  *   <format>        "text"|"xml"|"json"|"cli"|"netconf" (see format_enum), default: xml
@@ -879,17 +880,26 @@ cli_show_auto(clicon_handle h,
     char            *extdefault = NULL; /* with extended tagged modes */
     int              argc = 0;
     char            *xpath = NULL;
-    yang_stmt       *yspec;
+    yang_stmt       *yspec0;
     char            *api_path = NULL;
     int              cvvi = 0;
     char            *api_path_fmt;  /* xml key format */
-
+    char            *api_path_fmt01 = NULL;
+    char            *str;
+    char            *mtpoint = NULL;
+    
     if (cvec_len(argv) < 2 || cvec_len(argv) > 7){
         clicon_err(OE_PLUGIN, EINVAL, "Received %d arguments. Expected:: <api-path-fmt>* <database> [<format> <pretty> <state> <default> <prepend>]", cvec_len(argv));
         goto done;
     }
     api_path_fmt = cv_string_get(cvec_i(argv, argc++));
-    dbname = cv_string_get(cvec_i(argv, argc++));
+    str = cv_string_get(cvec_i(argv, argc++));
+    if (str && str[0] == '/'){ /* ad-hoc to see if 2nd arg is mountpoint */
+        mtpoint = str;
+        dbname = cv_string_get(cvec_i(argv, argc++));
+    }
+    else
+        dbname = str;
     if (cvec_len(argv) > argc)
         if (cli_show_option_format(argv, argc++, &format) < 0)
             goto done;
@@ -910,13 +920,22 @@ cli_show_auto(clicon_handle h,
     if (cvec_len(argv) > argc){
         prepend = cv_string_get(cvec_i(argv, argc++));
     }
-    if ((yspec = clicon_dbspec_yang(h)) == NULL){
+    if ((yspec0 = clicon_dbspec_yang(h)) == NULL){
         clicon_err(OE_FATAL, 0, "No DB_SPEC");
         goto done;
     }
-    if (api_path_fmt2api_path(api_path_fmt, cvv, &api_path, &cvvi) < 0)
+    if (mtpoint){ 
-        goto done;
+        /* Get and combined api-path01 */
-    if (api_path2xpath(api_path, yspec, &xpath, &nsc, NULL) < 0)
+        if (mtpoint_paths(yspec0, mtpoint, api_path_fmt, &api_path_fmt01) < 0)
+            goto done;
+        if (api_path_fmt2api_path(api_path_fmt01, cvv, &api_path, &cvvi) < 0)
+            goto done;
+    }
+    else{
+        if (api_path_fmt2api_path(api_path_fmt, cvv, &api_path, &cvvi) < 0)
+            goto done;
+    }
+    if (api_path2xpath(api_path, yspec0, &xpath, &nsc, NULL) < 0)
         goto done;
     if (xpath == NULL){
         clicon_err(OE_FATAL, 0, "Invalid api-path-fmt: %s", api_path_fmt);
@@ -928,6 +947,8 @@ cli_show_auto(clicon_handle h,
         goto done;
     retval = 0;
  done:
+    if (api_path_fmt01)
+        free(api_path_fmt01);
     if (nsc)
         xml_nsctx_free(nsc);
     if (xpath)

lib/src/clixon_xpath.c

@@ -969,7 +969,6 @@ xpath_vec_bool(cxobj      *xcur,
  * @retval     1       OK with nsc1 containing the transformed nsc
  * @retval     0       XPath failure with reason set to why
  * @retval    -1       Fatal Error
- * XXX Detects mountpoint but is not mountpoint aware, just copies prefixes
  */
 static int
 xpath_traverse_canonical(xpath_tree *xs,
@@ -1005,6 +1004,7 @@ xpath_traverse_canonical(xpath_tree *xs,
             goto fail;
         }
         if ((ymod = yang_find_module_by_namespace(yspec, namespace)) == NULL){
+#if 0 /* Just accept it, see note in xpath2canonical */
             if ((cb = cbuf_new()) == NULL){
                 clicon_err(OE_UNIX, errno, "cbuf_new");
                 goto done;
@@ -1013,12 +1013,11 @@ xpath_traverse_canonical(xpath_tree *xs,
             if (reason)
                 *reason = cb;
             goto fail;
+#endif
         }
-#if 0 /* safe-catch if previous check is not considered as an error */
         if (ymod == NULL) 
             prefix1 = prefix0;
         else
-#endif
             if ((prefix1 = yang_find_myprefix(ymod)) == NULL){
                 if ((cb = cbuf_new()) == NULL){
                     clicon_err(OE_UNIX, errno, "cbuf_new");
@@ -1093,6 +1092,10 @@ xpath_traverse_canonical(xpath_tree *xs,
  *   if (xpath1) free(xpath1);
  *   if (nsc1) xml_nsctx_free(nsc1);
  * @endcode
+ * @note Unsolvable issue of mountpoints, eg an xpath of //x:foo where foo is under one or several
+ *       mointpoints: a well-defined namespace cannot be determined. Therefore just allow 
+ *       inconsistencies and hope that it will be covered by other code
+ * @see xpath2xml
  */
 int
 xpath2canonical(const char *xpath0,

test/test_xpath_canonical.sh

@@ -56,9 +56,11 @@ expectpart "$($clixon_util_xpath -c -y $ydir -p "/i:x[.='42']" -n i:urn:example:
 new "xpath canonical form descendants"
 expectpart "$($clixon_util_xpath -c -y $ydir -p "//x[.='42']" -n null:urn:example:a -n j:urn:example:b)" 0 "//a:x\[.='42'\]" '0 : a = "urn:example:a"'
 
-new "xpath canonical form (no default should fail)"
+if false; then
-expectpart "$($clixon_util_xpath -c -y $ydir -p /x/j:y -n i:urn:example:a -n j:urn:example:b 2>&1)" 0 "/x/j:y: No namespace found for prefix"
+# No, with mointpoints I cant fail unknown prefix, see comment in xpath2canonical
-
+    new "xpath canonical form (no default should fail)"
+    expectpart "$($clixon_util_xpath -c -y $ydir -p /x/j:y -n i:urn:example:a -n j:urn:example:b 2>&1)" 0 "/x/j:y: No namespace found for prefix"
+fi
 new "xpath canonical form (wrong namespace should fail)"
 expectpart "$($clixon_util_xpath -c -y $ydir -p /i:x/j:y -n i:urn:example:c -n j:urn:example:b 2>&1)" 0 "/i:x/j:y: No yang found for namespace"