[gtk/wip/otte/json: 31/38] tools: Add gtk-json-validate

[Benjamin Otte <otte src gnome org>]

commit 17d7c9d177885c32506754c4845e50c7aad3cb36
Author: Benjamin Otte <otte redhat com>
Date:   Mon Nov 29 05:55:09 2021 +0100

    tools: Add gtk-json-validate
    
    It's a trivial port of json-glib-validate.

 tools/gtk-json-validate.c | 157 ++++++++++++++++++++++++++++++++++++++++++++++
 tools/meson.build         |   1 +
 2 files changed, 158 insertions(+)
---
diff --git a/tools/gtk-json-validate.c b/tools/gtk-json-validate.c
new file mode 100644
index 0000000000..73e94990e6
--- /dev/null
+++ b/tools/gtk-json-validate.c
@@ -0,0 +1,157 @@
+/* gtk-json-validate - Checks JSON data for errors
+ * 
+ * Copyright © 2013  Emmanuele Bassi
+ *             2021  Benjamin Otte
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ *   Emmanuele Bassi  <ebassi gnome org>
+ *   Benjamin Otte    <otte gnome org>
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <locale.h>
+
+#include <gio/gio.h>
+#include <glib/gi18n.h>
+
+#include "gtk/json/gtkjsonparserprivate.h"
+
+static char **files = NULL;
+
+static GOptionEntry entries[] = {
+  { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &files, NULL, NULL },
+  { NULL },
+};
+
+static gboolean
+validate (GFile *file)
+{
+  const GError *json_error;
+  GError *error = NULL;
+  GtkJsonParser *parser;
+  GBytes *bytes;
+
+  bytes = g_file_load_bytes (file, NULL, NULL, &error);
+  if (bytes == NULL)
+    {
+      /* Translators: the first %s is the program name, the second one
+       * is the URI of the file, the third is the error message.
+       */
+      g_printerr (_("%s: %s: error opening file: %s\n"),
+                  g_get_prgname (), g_file_get_uri (file), error->message);
+      g_error_free (error);
+      return FALSE;
+    }
+
+  parser = gtk_json_parser_new_for_bytes (bytes);
+  g_bytes_unref (bytes);
+
+  while (gtk_json_parser_next (parser));
+
+  json_error = gtk_json_parser_get_error (parser);
+  if (json_error)
+    {
+      /* Translators: the first %s is the program name, the second one
+       * is the URI of the file, the third is the error message.
+       */
+      g_printerr (_("%s: %s: error parsing file: %s\n"),
+                  g_get_prgname (), g_file_get_uri (file), json_error->message);
+      gtk_json_parser_free (parser);
+      return FALSE;
+    }
+
+  gtk_json_parser_free (parser);
+
+  return TRUE;
+}
+
+int
+main (int   argc,
+      char *argv[])
+{
+  GOptionContext *context = NULL;
+  GError *error = NULL;
+  const char *description;
+  const char *summary;
+  gchar *param;
+  gboolean res;
+  int i;
+
+  setlocale (LC_ALL, "");
+
+  bindtextdomain (GETTEXT_PACKAGE, GTK_LOCALEDIR);
+  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+  textdomain (GETTEXT_PACKAGE);
+
+  param = g_strdup_printf (("%s..."), _("FILE"));
+  /* Translators: this message will appear after the usage string */
+  /* and before the list of options.                              */
+  summary = _("Validate JSON files.");
+  description = _("json-glib-validate validates JSON data at the given URI.");
+
+  context = g_option_context_new (param);
+  g_option_context_set_summary (context, summary);
+  g_option_context_set_description (context, description);
+  g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
+  g_option_context_parse (context, &argc, &argv, &error);
+  g_option_context_free (context);
+
+  g_free (param);
+
+  if (error != NULL)
+    {
+      /* Translators: the %s is the program name. This error message
+       * means the user is calling json-glib-validate without any
+       * argument.
+       */
+      g_printerr (_("Error parsing commandline options: %s\n"), error->message);
+      g_printerr ("\n");
+      g_printerr (_("Try “%s --help” for more information."), g_get_prgname ());
+      g_printerr ("\n");
+      g_error_free (error);
+      return 1;
+    }
+
+  if (files == NULL)
+    {
+      /* Translators: the %s is the program name. This error message
+       * means the user is calling json-glib-validate without any
+       * argument.
+       */
+      g_printerr (_("%s: missing files"), g_get_prgname ());
+      g_printerr ("\n");
+      g_printerr (_("Try “%s --help” for more information."), g_get_prgname ());
+      g_printerr ("\n");
+      return 1;
+    }
+
+  res = TRUE;
+  i = 0;
+
+  do
+    {
+      GFile *file = g_file_new_for_commandline_arg (files[i]);
+
+      res = validate (file) && res;
+      g_object_unref (file);
+    }
+  while (files[++i] != NULL);
+
+  return res ? EXIT_SUCCESS : EXIT_FAILURE;
+}
diff --git a/tools/meson.build b/tools/meson.build
index 4cc8daf8a8..0289844311 100644
--- a/tools/meson.build
+++ b/tools/meson.build
@@ -32,6 +32,7 @@ gtk_tools = [
   ['gtk4-update-icon-cache', ['updateiconcache.c'] + extra_update_icon_cache_objs, [ libgtk_static_dep ] ],
   ['gtk4-encode-symbolic-svg', ['encodesymbolic.c'], [ libgtk_static_dep ] ],
   ['gtk4-json-format', ['gtk-json-format.c'], [ libgtk_json_dep ], [ libgtk_json ] ],
+  ['gtk4-json-validate', ['gtk-json-validate.c'], [ libgtk_json_dep ], [ libgtk_json ] ],
 ]
 
 if os_unix