core: Add ability for repositories to have a "parent"

This will be useful for ostbuild; a user can create their own archive
mode repository which transparently inherits objects from the
root-owned one in /ostree.

1 files changed, 144 insertions, 0 deletions

diff --git a/src/ostree/ot-builtin-config.c b/src/ostree/ot-builtin-config.c
new file mode 100644
index 00000000..8ad6a17c
--- /dev/null
+++ b/src/ostree/ot-builtin-config.c
@@ -0,0 +1,144 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ *
+ * Copyright (C) 2011 Colin Walters <walters@verbum.org>
+ *
+ * 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 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Colin Walters <walters@verbum.org>
+ */
+
+#include "config.h"
+
+#include "ot-builtins.h"
+#include "ostree.h"
+
+#include <glib/gi18n.h>
+
+static GOptionEntry options[] = {
+  { NULL }
+};
+
+static gboolean
+split_key_string (const char   *k,
+                  char       **out_section,
+                  char       **out_value,
+                  GError     **error)
+{
+  const char *dot = strchr (k, '.');
+  
+  if (!dot)
+    {
+      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                   "Key must be of the form \"sectionname.keyname\"");
+      return FALSE;
+    }
+
+  *out_section = g_strndup (k, dot - k);
+  *out_value = g_strdup (dot + 1);
+
+  return TRUE;
+}
+
+gboolean
+ostree_builtin_config (int argc, char **argv, GFile *repo_path, GError **error)
+{
+  GOptionContext *context = NULL;
+  gboolean ret = FALSE;
+  const char *op;
+  const char *section_key;
+  const char *value;
+  ot_lobj OstreeRepo *repo = NULL;
+  ot_lfree char *section = NULL;
+  ot_lfree char *key = NULL;
+  GKeyFile *config = NULL;
+
+  context = g_option_context_new ("- Change configuration settings");
+  g_option_context_add_main_entries (context, options, NULL);
+
+  if (!g_option_context_parse (context, &argc, &argv, error))
+    goto out;
+
+  repo = ostree_repo_new (repo_path);
+  if (!ostree_repo_check (repo, error))
+    goto out;
+
+  if (argc < 2)
+    {
+      ot_util_usage_error (context, "OPERATION must be specified", error);
+      goto out;
+    }
+
+  op = argv[1];
+
+  if (!strcmp (op, "set"))
+    {
+      if (argc < 4)
+        {
+          g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                       "KEY and VALUE must be specified");
+          goto out;
+        }
+
+      section_key = argv[2];
+      value = argv[3];
+
+      if (!split_key_string (section_key, &section, &key, error))
+        goto out;
+
+      config = ostree_repo_copy_config (repo);
+      g_key_file_set_string (config, section, key, value);
+
+      if (!ostree_repo_write_config (repo, config, error))
+        goto out;
+    }
+  else if (!strcmp (op, "set"))
+    {
+      ot_lfree char *value = NULL;
+      if (argc < 3)
+        {
+          g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                       "KEY must be specified");
+          goto out;
+        }
+
+      section_key = argv[2];
+
+      if (!split_key_string (section_key, &section, &key, error))
+        goto out;
+
+      config = g_key_file_ref (ostree_repo_get_config (repo));
+
+      value = g_key_file_get_string (config, section, key, error);
+      if (value == NULL)
+        goto out;
+
+      g_print ("%s\n", value);
+    }
+  else
+    {
+      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                   "Unknown operation %s", op);
+      goto out;
+    }
+  
+  ret = TRUE;
+ out:
+  if (config)
+    g_key_file_free (config);
+  if (context)
+    g_option_context_free (context);
+  return ret;
+}