yanglint: Add commands for sample skeleton generation and IETF validation

tools/lint/CMakeLists.txt

@@ -14,6 +14,8 @@ set(lintsrc
     cmd_help.c
     cmd_verb.c
     cmd_debug.c
+    cmd_sample.c
+    cmd_ietf.c
     yl_opt.c
     yl_schema_features.c
     common.c

tools/lint/cmd.c

@@ -72,6 +72,10 @@ COMMAND commands[] = {
         "data", cmd_data_opt, cmd_data_dep, cmd_data_store, cmd_data_process, cmd_data_help, NULL,
         "Load, validate and optionally print instance data", "d:ef:F:hmo:O:R:r:nt:x:k:"
     },
+    {
+        "sample", cmd_sample_opt, cmd_sample_dep, cmd_sample_exec, NULL, cmd_sample_help, NULL,
+        "Generate a sample data skeleton for a module", "f:ho:"
+    },
     {
         "list", cmd_list_opt, cmd_list_dep, cmd_list_exec, NULL, cmd_list_help, NULL,
         "List all the loaded modules", "f:h"
@@ -104,6 +108,10 @@ COMMAND commands[] = {
         "Unsupported for the Release build", "h"
 #endif
     },
+    {
+        "ietf", cmd_ietf_opt, cmd_ietf_dep, cmd_ietf_exec, NULL, cmd_ietf_help, NULL,
+        "Validate a loaded schema module according to IETF rules", "ho:"
+    },
     {"quit", NULL, NULL, cmd_quit_exec, NULL, NULL, NULL, "Quit the program", "h"},
     /* synonyms for previous commands */
     {"?", NULL, NULL, cmd_help_exec, NULL, NULL, NULL, "Display commands description", "h"},

tools/lint/cmd.h

@@ -276,6 +276,27 @@ int cmd_print_dep(struct yl_opt *yo, int posc);
 int cmd_print_exec(struct ly_ctx **ctx, struct yl_opt *yo, const char *posv);
 void cmd_print_help(void);
 
+/* cmd_sample.c */
+
+/**
+ * @copydoc cmd_add_opt
+ */
+int cmd_sample_opt(struct yl_opt *yo, const char *cmdline, char ***posv, int *posc);
+/**
+ * @copydoc cmd_add_dep
+ */
+int cmd_sample_dep(struct yl_opt *yo, int posc);
+void cmd_sample_help(void);
+/**
+ * @brief Print a sample skeleton of module in json or xml.
+ *
+ * @param[in,out] ctx context for libyang.
+ * @param[in] yo context for yanglint.
+ * @param[in] posv Name of the module to be printed.
+ * @return 0 on success, 1 on failure.
+ */
+int cmd_sample_exec(struct ly_ctx **ctx, struct yl_opt *yo, const char *posv);
+
 /* cmd_searchpath.c */
 
 /**
@@ -391,4 +412,26 @@ int cmd_debug_store(struct ly_ctx **ctx, struct yl_opt *yo, const char *posv);
 int cmd_debug_setlog(struct ly_ctx *ctx, struct yl_opt *yo);
 void cmd_debug_help(void);
 
+/* cmd_ietf.c */
+/**
+ * @copydoc cmd_add_opt
+ */
+int cmd_ietf_opt(struct yl_opt *yo, const char *cmdline, char ***posv, int *posc);
+/**
+ * @copydoc cmd_add_dep
+ */
+int cmd_ietf_dep(struct yl_opt *yo, int posc);
+void cmd_ietf_help(void);
+
+/**
+ * @brief Execution handler for the 'ietf' command in the yanglint CLI tool.
+ *
+ * @param[in,out] ctx A double pointer to the libyang context containing the loaded modules.
+ * @param[in,out] yo A pointer to the yanglint options structure, which manages global
+ * @param[in] posv The positional command-line argument provided by the user, representing the target module name (e.g., "ietf-interfaces" or "ietf-interfaces@2014-05-08").
+ * @return 0 on successful execution of the validation pipeline (note: this returns 0 even if IETF compliance warnings/errors were printed to the output).
+ * @return 1 on fatal execution errors (e.g., module not found, module failed to compile, or memory allocation failure).
+ */
+int cmd_ietf_exec(struct ly_ctx **ctx, struct yl_opt *yo, const char *posv);
+
 #endif /* COMMANDS_H_ */

tools/lint/cmd_add.c

@@ -130,7 +130,7 @@ store_parsed_module(const char *filepath, struct lys_module *mod, struct yl_opt
 {
     assert(!yo->interactive);
 
-    if (yo->schema_out_format || yo->feature_param_format) {
+    if (yo->schema_out_format || yo->feature_param_format || yo->data_out_format || yo->ietf_validation) {
         if (ly_set_add(&yo->schema_modules, (void *)mod, 1, NULL)) {
             YLMSG_E("Storing parsed schema module (%s) for print failed.", filepath);
             return 1;