tests/: add gio-du

This is basically a minimally-featured 'du' equivalent to manually test
g_file_measure_disk_usage().

https://bugzilla.gnome.org/show_bug.cgi?id=704893

gio/tests/Makefile.am

@@ -69,6 +69,7 @@ test_data = \
 	$(NULL)
 
 uninstalled_test_extra_programs = \
+	gio-du					\
 	echo-server				\
 	filter-cat				\
 	gapplication-example-actions		\

gio/tests/gio-du.c

@@ -0,0 +1,146 @@
+#include <gio/gio.h>
+#include <locale.h>
+
+static gboolean option_use_async;
+static gint     option_format_size;
+
+static gint     outstanding_asyncs;
+
+static void
+print_result (const gchar *filename,
+              guint64      disk_usage,
+              guint64      num_dirs,
+              guint64      num_files,
+              GError      *error,
+              gchar        nl)
+{
+  if (!error)
+    {
+      if (option_format_size)
+        {
+          GFormatSizeFlags format_flags;
+          gchar *str;
+
+          format_flags = (option_format_size > 1) ? G_FORMAT_SIZE_LONG_FORMAT : G_FORMAT_SIZE_DEFAULT;
+          str = g_format_size_full (disk_usage, format_flags);
+          g_print ("%s: %s (%"G_GUINT64_FORMAT" dirs, %"G_GUINT64_FORMAT" files)%c",
+                   filename, str, num_dirs, num_files, nl);
+          g_free (str);
+        }
+      else
+        g_print ("%s: %"G_GUINT64_FORMAT" (%"G_GUINT64_FORMAT" dirs, %"G_GUINT64_FORMAT" files)%c",
+                 filename, disk_usage, num_dirs, num_files, nl);
+    }
+  else
+    {
+      g_printerr ("%s: %s\n", filename, error->message);
+      g_error_free (error);
+    }
+}
+
+static void
+async_ready_func (GObject      *source,
+                  GAsyncResult *result,
+                  gpointer      user_data)
+{
+  const gchar *filename = user_data;
+  GError *error = NULL;
+  guint64 disk_usage;
+  guint64 num_dirs;
+  guint64 num_files;
+
+  g_file_measure_disk_usage_finish (G_FILE (source), result, &disk_usage, &num_dirs, &num_files, &error);
+  print_result (filename, disk_usage, num_dirs, num_files, error, '\n');
+  outstanding_asyncs--;
+}
+
+static void
+report_progress (gboolean reporting,
+                 guint64  disk_usage,
+                 guint64  num_dirs,
+                 guint64  num_files,
+                 gpointer user_data)
+{
+  const gchar *filename = user_data;
+
+  if (!reporting)
+    g_printerr ("%s: warning: does not support progress reporting\n", filename);
+
+  print_result (filename, disk_usage, num_dirs, num_files, NULL, '\r');
+}
+
+int
+main (int argc, char **argv)
+{
+  GFileMeasureProgressCallback progress;
+  GFileMeasureFlags flags = 0;
+  gint i;
+
+  setlocale (LC_ALL, "");
+
+  for (i = 1; argv[i] && argv[i][0] == '-'; i++)
+    {
+      if (g_str_equal (argv[i], "--"))
+        break;
+
+      if (g_str_equal (argv[i], "--help"))
+        {
+          g_print ("usage: du [--progress] [--async] [-x] [-h] [-h] [--apparent-size] [--any-error] [--] files...\n");
+          return 0;
+        }
+      else if (g_str_equal (argv[i], "-x"))
+        flags |= G_FILE_MEASURE_NO_XDEV;
+      else if (g_str_equal (argv[i], "-h"))
+        option_format_size++;
+      else if (g_str_equal (argv[i], "--apparent-size"))
+        flags |= G_FILE_MEASURE_APPARENT_SIZE;
+      else if (g_str_equal (argv[i], "--any-error"))
+        flags |= G_FILE_MEASURE_REPORT_ANY_ERROR;
+      else if (g_str_equal (argv[i], "--async"))
+        option_use_async = TRUE;
+      else if (g_str_equal (argv[i], "--progress"))
+        progress = report_progress;
+      else
+        {
+          g_printerr ("unrecognised flag %s\n", argv[i]);
+        }
+    }
+
+  if (!argv[i])
+    {
+      g_printerr ("usage: du [--progress] [--async] [-x] [-h] [-h] [--apparent-size] [--any-error] [--] files...\n");
+      return 1;
+    }
+
+  while (argv[i])
+    {
+      GFile *file = g_file_new_for_commandline_arg (argv[i]);
+
+      if (option_use_async)
+        {
+          g_file_measure_disk_usage_async (file, flags, G_PRIORITY_DEFAULT, NULL,
+                                           progress, argv[1], async_ready_func, argv[i]);
+          outstanding_asyncs++;
+        }
+      else
+        {
+          GError *error = NULL;
+          guint64 disk_usage;
+          guint64 num_dirs;
+          guint64 num_files;
+
+          g_file_measure_disk_usage (file, flags, NULL, progress, argv[1],
+                                     &disk_usage, &num_dirs, &num_files, &error);
+          print_result (argv[i], disk_usage, num_dirs, num_files, error, '\n');
+        }
+
+      g_object_unref (file);
+
+      i++;
+    }
+
+  while (outstanding_asyncs)
+    g_main_context_iteration (NULL, TRUE);
+
+  return 0;
+}