Add a new gio commandline tool

This command collects the various commandline utilities that
are currently shipped in gvfs, and unifies them under a single,
command-style binary.

The tools just use GIO APIs, so it makes sense for them to live here.

gio/gio-tool-mime.c

@@ -0,0 +1,176 @@
+/*
+ * Copyright 2015 Red Hat, Inc.
+ *
+ * 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 of the licence, 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: Matthias Clasen <mclasen@redhat.com>
+ */
+
+#include "config.h"
+
+#include <gio/gio.h>
+#include <gi18n.h>
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "gio-tool.h"
+
+static const GOptionEntry entries[] = {
+  { NULL }
+};
+
+static GAppInfo *
+get_app_info_for_id (const char *id)
+{
+  GList *list, *l;
+  GAppInfo *ret_info;
+
+  list = g_app_info_get_all ();
+  ret_info = NULL;
+  for (l = list; l != NULL; l = l->next)
+    {
+      GAppInfo *info;
+
+      info = l->data;
+      if (ret_info == NULL && g_strcmp0 (g_app_info_get_id (info), id) == 0)
+        ret_info = info;
+      else
+        g_object_unref (info);
+    }
+  g_list_free (list);
+
+  return ret_info;
+}
+
+int
+handle_mime (int argc, char *argv[], gboolean do_help)
+{
+  GOptionContext *context;
+  GError *error = NULL;
+  gchar *param;
+  const gchar *mimetype;
+  const char *handler;
+
+  g_set_prgname ("gio mime");
+
+  /* Translators: commandline placeholder */
+  param = g_strdup_printf ("%s [%s]", _("MIMETYPE"), _("HANDLER"));
+  context = g_option_context_new (param);
+  g_free (param);
+  g_option_context_set_help_enabled (context, FALSE);
+  g_option_context_set_summary (context,
+      _("Get or set the handler for a mimetype."));
+  g_option_context_set_description (context,
+      _("If no handler is given, lists registered and recommended applications\n"
+        "for the mimetype. If a handler is given, it is set as the default\n"
+        "handler for the mimetype."));
+  g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
+
+  if (do_help)
+    {
+      show_help (context, NULL);
+      return 0;
+    }
+
+  if (!g_option_context_parse (context, &argc, &argv, &error))
+    {
+      show_help (context, error->message);
+      g_error_free (error);
+      return 1;
+    }
+
+  if (argc != 2 && argc != 3)
+    {
+      show_help (context, _("Must specify a single mimetype, and maybe a handler"));
+      return 1;
+    }
+
+  g_option_context_free (context);
+
+  if (argc == 2)
+    {
+      GAppInfo *info;
+
+      mimetype = argv[1];
+
+      info = g_app_info_get_default_for_type (mimetype, FALSE);
+      if (!info)
+        {
+          g_print (_("No default applications for '%s'\n"), mimetype);
+        }
+      else
+        {
+          GList *list, *l;
+
+          g_print (_("Default application for '%s': %s\n"), mimetype, g_app_info_get_id (info));
+          g_object_unref (info);
+
+          list = g_app_info_get_all_for_type (mimetype);
+          if (list != NULL)
+            g_print (_("Registered applications:\n"));
+          else
+            g_print (_("No registered applications\n"));
+          for (l = list; l != NULL; l = l->next)
+            {
+              info = l->data;
+              g_print ("\t%s\n", g_app_info_get_id (info));
+              g_object_unref (info);
+            }
+          g_list_free (list);
+
+          list = g_app_info_get_recommended_for_type (mimetype);
+          if (list != NULL)
+            g_print (_("Recommended applications:\n"));
+          else
+            g_print (_("No recommended applications\n"));
+          for (l = list; l != NULL; l = l->next)
+            {
+              info = l->data;
+              g_print ("\t%s\n", g_app_info_get_id (info));
+              g_object_unref (info);
+            }
+          g_list_free (list);
+        }
+    }
+  else
+    {
+      GAppInfo *info;
+
+      mimetype = argv[1];
+      handler = argv[2];
+
+      info = get_app_info_for_id (handler);
+      if (info == NULL)
+        {
+          g_printerr (_("Failed to load info for handler '%s'\n"), handler);
+          return 1;
+        }
+
+      if (g_app_info_set_as_default_for_type (info, mimetype, &error) == FALSE)
+        {
+          g_printerr (_("Failed to set '%s' as the default handler for '%s': %s\n"),
+                      handler, mimetype, error->message);
+          g_error_free (error);
+          g_object_unref (info);
+          return 1;
+        }
+      g_print ("Set %s as the default for %s\n", g_app_info_get_id (info), mimetype);
+      g_object_unref (info);
+    }
+
+  return 0;
+}