tools/lint/cmd_print.c - github/CESNET/libyang - Gitiles

 /**
  * @file cmd_print.c
  * @author Michal Vasko <mvasko@cesnet.cz>
  * @author Radek Krejci <rkrejci@cesnet.cz>
  * @author Adam Piecek <piecek@cesnet.cz>
  * @brief 'print' command of the libyang's yanglint tool.
  *
  * Copyright (c) 2015-2023 CESNET, z.s.p.o.
  *
  * This source code is licensed under BSD 3-Clause License (the "License").
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     https://opensource.org/licenses/BSD-3-Clause
  */

 #define _GNU_SOURCE

 #include "cmd.h"

 #include <errno.h>
 #include <getopt.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
 #include <strings.h>

 #include "libyang.h"

 #include "common.h"
 #include "yl_opt.h"

 void
 cmd_print_help(void)
 {
     printf("Usage: print [-f (yang | yin | tree [-q -P PATH -L LINE_LENGTH ] | info [-q -P PATH])]\n"
             "            [-o OUTFILE] [<module-name1>[@revision]] ...\n"
             "                  Print a schema module. The <module-name> is not required\n"
             "                  only in case the -P option is specified. For yang, yin and tree\n"
             "                  formats, a submodule can also be printed.\n\n"
             "  -f FORMAT, --format=FORMAT\n"
             "                  Print the module in the specified FORMAT. If format not\n"
             "                  specified, the 'tree' format is used.\n"
             "  -L LINE_LENGTH, --tree-line-length=LINE_LENGTH\n"
             "                 The limit of the maximum line length on which the 'tree'\n"
             "                 format will try to be printed.\n"
             "  -P PATH, --schema-node=PATH\n"
             "                 Print only the specified subtree of the schema.\n"
             "                 The PATH is the XPath subset mentioned in documentation as\n"
             "                 the Path format. The option can be combined with --single-node\n"
             "                 option to print information only about the specified node.\n"
             "  -q, --single-node\n"
             "                 Supplement to the --schema-node option to print information\n"
             "                 only about a single node specified as PATH argument.\n"
             "  -o OUTFILE, --output=OUTFILE\n"
             "                  Write the output to OUTFILE instead of stdout.\n");
 }

 int
 cmd_print_opt(struct yl_opt *yo, const char *cmdline, char ***posv, int *posc)
 {
     int rc = 0, argc = 0;
     int opt, opt_index;
     struct option options[] = {
         {"format", required_argument, NULL, 'f'},
         {"help", no_argument, NULL, 'h'},
         {"tree-line-length", required_argument, NULL, 'L'},
         {"output", required_argument, NULL, 'o'},
         {"schema-node", required_argument, NULL, 'P'},
         {"single-node", no_argument, NULL, 'q'},
         {NULL, 0, NULL, 0}
     };

     yo->schema_out_format = LYS_OUT_TREE;

     if ((rc = parse_cmdline(cmdline, &argc, &yo->argv))) {
         return rc;
     }

     while ((opt = getopt_long(argc, yo->argv, commands[CMD_PRINT].optstring, options, &opt_index)) != -1) {
         switch (opt) {
         case 'o': /* --output */
             if (yo->out) {
                 YLMSG_E("Only a single output can be specified.\n");
                 return 1;
             } else {
                 if (ly_out_new_filepath(optarg, &yo->out)) {
                     YLMSG_E("Unable open output file %s (%s)\n", optarg, strerror(errno));
                     return 1;
                 }
             }
             break;

         case 'f': /* --format */
             if (yl_opt_update_schema_out_format(optarg, yo)) {
                 cmd_print_help();
                 return 1;
             }
             break;

         case 'L': /* --tree-line-length */
             yo->line_length = atoi(optarg);
             break;

         case 'P': /* --schema-node */
             yo->schema_node_path = optarg;
             break;

         case 'q': /* --single-node */
             yo->schema_print_options |= LYS_PRINT_NO_SUBSTMT;
             break;

         case 'h':
             cmd_print_help();
             return 1;
         default:
             YLMSG_E("Unknown option.\n");
             return 1;
         }
     }

     *posv = &yo->argv[optind];
     *posc = argc - optind;

     return 0;
 }

 int
 cmd_print_dep(struct yl_opt *yo, int posc)
 {
     /* file name */
     if (yo->interactive && !posc && !yo->schema_node_path) {
         YLMSG_E("Missing the name of the module to print.\n");
         return 1;
     }

     if ((yo->schema_out_format != LYS_OUT_TREE) && yo->line_length) {
         YLMSG_W("--tree-line-length take effect only in case of the tree output format.\n");
     }

     if (!yo->out) {
         if (ly_out_new_file(stdout, &yo->out)) {
             YLMSG_E("Could not use stdout to print output.\n");
         }
         yo->out_stdout = 1;
     }

     if (yo->schema_out_format == LYS_OUT_TREE) {
         /* print tree from lysc_nodes */
         yo->ctx_options |= LY_CTX_SET_PRIV_PARSED;
     }

     return 0;
 }

 static LY_ERR
 print_submodule(struct ly_out *out, struct ly_ctx **ctx, char *name, char *revision, LYS_OUTFORMAT format, size_t line_length, uint32_t options)
 {
     LY_ERR erc;
     const struct lysp_submodule *submodule;

     submodule = revision ?
             ly_ctx_get_submodule(*ctx, name, revision) :
             ly_ctx_get_submodule_latest(*ctx, name);

     erc = submodule ?
             lys_print_submodule(out, submodule, format, line_length, options) :
             LY_ENOTFOUND;

     if (!erc) {
         return 0;
     } else if ((erc == LY_ENOTFOUND) && revision) {
         YLMSG_E("No submodule \"%s\" found.\n", name);
     } else {
         YLMSG_E("Unable to print submodule %s.\n", name);
     }

     return erc;
 }

 static LY_ERR
 print_module(struct ly_out *out, struct ly_ctx **ctx, char *name, char *revision, LYS_OUTFORMAT format, size_t line_length, uint32_t options)
 {
     LY_ERR erc;
     struct lys_module *module;

     module = revision ?
             ly_ctx_get_module(*ctx, name, revision) :
             ly_ctx_get_module_latest(*ctx, name);

     erc = module ?
             lys_print_module(out, module, format, line_length, options) :
             LY_ENOTFOUND;

     if (!erc) {
         return 0;
     } else if ((erc == LY_ENOTFOUND) && revision) {
         YLMSG_E("No module \"%s\" found.\n", name);
     } else {
         YLMSG_E("Unable to print module %s.\n", name);
     }

     return erc;
 }

 static int
 cmd_print_module(const char *posv, struct ly_out *out, struct ly_ctx **ctx, LYS_OUTFORMAT format,
         size_t line_length, uint32_t options)
 {
     LY_ERR erc;
     char *name = NULL, *revision;

     name = strdup(posv);
     /* get revision */
     revision = strchr(name, '@');
     if (revision) {
         revision[0] = '\0';
         ++revision;
     }

     erc = print_module(out, ctx, name, revision, format, line_length, options);

     if (erc == LY_ENOTFOUND) {
         erc = print_submodule(out, ctx, name, revision, format, line_length, options);
     }

     free(name);
     return erc;
 }

 /**
  * @brief Print schema node path.
  *
  * @param[in] ctx Context for libyang.
  * @param[in] yo Context for yanglint.
  * @return 0 on success.
  */
 static int
 print_node(struct ly_ctx *ctx, struct yl_opt *yo)
 {
     const struct lysc_node *node;
     uint32_t temp_lo = 0;

     if (yo->interactive) {
         /* Use the same approach as for completion. */
         node = find_schema_path(ctx, yo->schema_node_path);
         if (!node) {
             YLMSG_E("The requested schema node \"%s\" does not exists.\n", yo->schema_node_path);
             return 1;
         }
     } else {
         /* turn off logging so that the message is not repeated */
         ly_temp_log_options(&temp_lo);
         /* search operation input */
         node = lys_find_path(ctx, NULL, yo->schema_node_path, 0);
         if (!node) {
             /* restore logging so an error may be displayed */
             ly_temp_log_options(NULL);
             /* search operation output */
             node = lys_find_path(ctx, NULL, yo->schema_node_path, 1);
             if (!node) {
                 YLMSG_E("Invalid schema path.\n");
                 return 1;
             }
         }
     }

     if (lys_print_node(yo->out, node, yo->schema_out_format, yo->line_length, yo->schema_print_options)) {
         YLMSG_E("Unable to print schema node %s.\n", yo->schema_node_path);
         return 1;
     }

     return 0;
 }

 int
 cmd_print_exec(struct ly_ctx **ctx, struct yl_opt *yo, const char *posv)
 {
     int rc = 0;

     if (yo->ctx_options & LY_CTX_SET_PRIV_PARSED) {
         /* print tree from lysc_nodes */
         ly_ctx_set_options(*ctx, LY_CTX_SET_PRIV_PARSED);
     }

     if (yo->schema_node_path) {
         rc = print_node(*ctx, yo);
     } else if (!yo->interactive && yo->submodule) {
         rc = print_submodule(yo->out, ctx, yo->submodule, NULL, yo->schema_out_format, yo->line_length,
                 yo->schema_print_options);
     } else {
         rc = cmd_print_module(posv, yo->out, ctx, yo->schema_out_format, yo->line_length, yo->schema_print_options);
         if (!yo->last_one && (yo->schema_out_format == LYS_OUT_TREE)) {
             ly_print(yo->out, "\n");
         }
     }

     return rc;
 }
	/**
	* @file cmd_print.c
	* @author Michal Vasko <mvasko@cesnet.cz>
	* @author Radek Krejci <rkrejci@cesnet.cz>
	* @author Adam Piecek <piecek@cesnet.cz>
	* @brief 'print' command of the libyang's yanglint tool.
	*
	* Copyright (c) 2015-2023 CESNET, z.s.p.o.
	*
	* This source code is licensed under BSD 3-Clause License (the "License").
	* You may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* https://opensource.org/licenses/BSD-3-Clause
	*/

	#define _GNU_SOURCE

	#include "cmd.h"

	#include <errno.h>
	#include <getopt.h>
	#include <stdint.h>
	#include <stdio.h>
	#include <string.h>
	#include <strings.h>

	#include "libyang.h"

	#include "common.h"
	#include "yl_opt.h"

	void
	cmd_print_help(void)
	{
	printf("Usage: print [-f (yang \| yin \| tree [-q -P PATH -L LINE_LENGTH ] \| info [-q -P PATH])]\n"
	" [-o OUTFILE] [<module-name1>[@revision]] ...\n"
	" Print a schema module. The <module-name> is not required\n"
	" only in case the -P option is specified. For yang, yin and tree\n"
	" formats, a submodule can also be printed.\n\n"
	" -f FORMAT, --format=FORMAT\n"
	" Print the module in the specified FORMAT. If format not\n"
	" specified, the 'tree' format is used.\n"
	" -L LINE_LENGTH, --tree-line-length=LINE_LENGTH\n"
	" The limit of the maximum line length on which the 'tree'\n"
	" format will try to be printed.\n"
	" -P PATH, --schema-node=PATH\n"
	" Print only the specified subtree of the schema.\n"
	" The PATH is the XPath subset mentioned in documentation as\n"
	" the Path format. The option can be combined with --single-node\n"
	" option to print information only about the specified node.\n"
	" -q, --single-node\n"
	" Supplement to the --schema-node option to print information\n"
	" only about a single node specified as PATH argument.\n"
	" -o OUTFILE, --output=OUTFILE\n"
	" Write the output to OUTFILE instead of stdout.\n");
	}

	int
	cmd_print_opt(struct yl_opt yo, const char cmdline, char **posv, int posc)
	{
	int rc = 0, argc = 0;
	int opt, opt_index;
	struct option options[] = {
	{"format", required_argument, NULL, 'f'},
	{"help", no_argument, NULL, 'h'},
	{"tree-line-length", required_argument, NULL, 'L'},
	{"output", required_argument, NULL, 'o'},
	{"schema-node", required_argument, NULL, 'P'},
	{"single-node", no_argument, NULL, 'q'},
	{NULL, 0, NULL, 0}
	};

	yo->schema_out_format = LYS_OUT_TREE;

	if ((rc = parse_cmdline(cmdline, &argc, &yo->argv))) {
	return rc;
	}

	while ((opt = getopt_long(argc, yo->argv, commands[CMD_PRINT].optstring, options, &opt_index)) != -1) {
	switch (opt) {
	case 'o': /* --output */
	if (yo->out) {
	YLMSG_E("Only a single output can be specified.\n");
	return 1;
	} else {
	if (ly_out_new_filepath(optarg, &yo->out)) {
	YLMSG_E("Unable open output file %s (%s)\n", optarg, strerror(errno));
	return 1;
	}
	}
	break;

	case 'f': /* --format */
	if (yl_opt_update_schema_out_format(optarg, yo)) {
	cmd_print_help();
	return 1;
	}
	break;

	case 'L': /* --tree-line-length */
	yo->line_length = atoi(optarg);
	break;

	case 'P': /* --schema-node */
	yo->schema_node_path = optarg;
	break;

	case 'q': /* --single-node */
	yo->schema_print_options \|= LYS_PRINT_NO_SUBSTMT;
	break;

	case 'h':
	cmd_print_help();
	return 1;
	default:
	YLMSG_E("Unknown option.\n");
	return 1;
	}
	}

	*posv = &yo->argv[optind];
	*posc = argc - optind;

	return 0;
	}

	int
	cmd_print_dep(struct yl_opt *yo, int posc)
	{
	/* file name */
	if (yo->interactive && !posc && !yo->schema_node_path) {
	YLMSG_E("Missing the name of the module to print.\n");
	return 1;
	}

	if ((yo->schema_out_format != LYS_OUT_TREE) && yo->line_length) {
	YLMSG_W("--tree-line-length take effect only in case of the tree output format.\n");
	}

	if (!yo->out) {
	if (ly_out_new_file(stdout, &yo->out)) {
	YLMSG_E("Could not use stdout to print output.\n");
	}
	yo->out_stdout = 1;
	}

	if (yo->schema_out_format == LYS_OUT_TREE) {
	/* print tree from lysc_nodes */
	yo->ctx_options \|= LY_CTX_SET_PRIV_PARSED;
	}

	return 0;
	}

	static LY_ERR
	print_submodule(struct ly_out out, struct ly_ctx ctx, char name, char *revision, LYS_OUTFORMAT format, size_t line_length, uint32_t options)
	{
	LY_ERR erc;
	const struct lysp_submodule *submodule;

	submodule = revision ?
	ly_ctx_get_submodule(*ctx, name, revision) :
	ly_ctx_get_submodule_latest(*ctx, name);

	erc = submodule ?
	lys_print_submodule(out, submodule, format, line_length, options) :
	LY_ENOTFOUND;

	if (!erc) {
	return 0;
	} else if ((erc == LY_ENOTFOUND) && revision) {
	YLMSG_E("No submodule \"%s\" found.\n", name);
	} else {
	YLMSG_E("Unable to print submodule %s.\n", name);
	}

	return erc;
	}

	static LY_ERR
	print_module(struct ly_out out, struct ly_ctx ctx, char name, char *revision, LYS_OUTFORMAT format, size_t line_length, uint32_t options)
	{
	LY_ERR erc;
	struct lys_module *module;

	module = revision ?
	ly_ctx_get_module(*ctx, name, revision) :
	ly_ctx_get_module_latest(*ctx, name);

	erc = module ?
	lys_print_module(out, module, format, line_length, options) :
	LY_ENOTFOUND;

	if (!erc) {
	return 0;
	} else if ((erc == LY_ENOTFOUND) && revision) {
	YLMSG_E("No module \"%s\" found.\n", name);
	} else {
	YLMSG_E("Unable to print module %s.\n", name);
	}

	return erc;
	}

	static int
	cmd_print_module(const char posv, struct ly_out out, struct ly_ctx **ctx, LYS_OUTFORMAT format,
	size_t line_length, uint32_t options)
	{
	LY_ERR erc;
	char name = NULL, revision;

	name = strdup(posv);
	/* get revision */
	revision = strchr(name, '@');
	if (revision) {
	revision[0] = '\0';
	++revision;
	}

	erc = print_module(out, ctx, name, revision, format, line_length, options);

	if (erc == LY_ENOTFOUND) {
	erc = print_submodule(out, ctx, name, revision, format, line_length, options);
	}

	free(name);
	return erc;
	}

	/**
	* @brief Print schema node path.
	*
	* @param[in] ctx Context for libyang.
	* @param[in] yo Context for yanglint.
	* @return 0 on success.
	*/
	static int
	print_node(struct ly_ctx ctx, struct yl_opt yo)
	{
	const struct lysc_node *node;
	uint32_t temp_lo = 0;

	if (yo->interactive) {
	/* Use the same approach as for completion. */
	node = find_schema_path(ctx, yo->schema_node_path);
	if (!node) {
	YLMSG_E("The requested schema node \"%s\" does not exists.\n", yo->schema_node_path);
	return 1;
	}
	} else {
	/* turn off logging so that the message is not repeated */
	ly_temp_log_options(&temp_lo);
	/* search operation input */
	node = lys_find_path(ctx, NULL, yo->schema_node_path, 0);
	if (!node) {
	/* restore logging so an error may be displayed */
	ly_temp_log_options(NULL);
	/* search operation output */
	node = lys_find_path(ctx, NULL, yo->schema_node_path, 1);
	if (!node) {
	YLMSG_E("Invalid schema path.\n");
	return 1;
	}
	}
	}

	if (lys_print_node(yo->out, node, yo->schema_out_format, yo->line_length, yo->schema_print_options)) {
	YLMSG_E("Unable to print schema node %s.\n", yo->schema_node_path);
	return 1;
	}

	return 0;
	}

	int
	cmd_print_exec(struct ly_ctx *ctx, struct yl_opt yo, const char *posv)
	{
	int rc = 0;

	if (yo->ctx_options & LY_CTX_SET_PRIV_PARSED) {
	/* print tree from lysc_nodes */
	ly_ctx_set_options(*ctx, LY_CTX_SET_PRIV_PARSED);
	}

	if (yo->schema_node_path) {
	rc = print_node(*ctx, yo);
	} else if (!yo->interactive && yo->submodule) {
	rc = print_submodule(yo->out, ctx, yo->submodule, NULL, yo->schema_out_format, yo->line_length,
	yo->schema_print_options);
	} else {
	rc = cmd_print_module(posv, yo->out, ctx, yo->schema_out_format, yo->line_length, yo->schema_print_options);
	if (!yo->last_one && (yo->schema_out_format == LYS_OUT_TREE)) {
	ly_print(yo->out, "\n");
	}
	}

	return rc;
	}