[ostree] admin: Use /sysroot/ostree automatically

[Colin Walters <walters src gnome org>]

commit 420e5f706a301ae857f23f8e00c9c3b04d3fde02
Author: Colin Walters <walters verbum org>
Date:   Tue Feb 19 11:02:33 2013 -0500

    admin: Use /sysroot/ostree automatically
    
    When booted inside an ostree system, we want /sysroot/ostree, not
    just /ostree by default.

 src/ostree/ot-admin-builtin-run-triggers.c |   16 +---------
 src/ostree/ot-admin-functions.c            |   45 +++++++++++----------------
 src/ostree/ot-admin-functions.h            |    6 ++--
 src/ostree/ot-builtin-admin.c              |   13 +++++++-
 4 files changed, 33 insertions(+), 47 deletions(-)
---
diff --git a/src/ostree/ot-admin-builtin-run-triggers.c b/src/ostree/ot-admin-builtin-run-triggers.c
index 9adbf0f..3c3df5d 100644
--- a/src/ostree/ot-admin-builtin-run-triggers.c
+++ b/src/ostree/ot-admin-builtin-run-triggers.c
@@ -48,21 +48,7 @@ ot_admin_builtin_run_triggers (int argc, char **argv, OtAdminBuiltinOpts *admin_
   if (!g_option_context_parse (context, &argc, &argv, error))
     goto out;
 
-  if (argc >= 2)
-    {
-      rootdir = g_file_new_for_path (argv[1]);
-    }
-  else
-    {
-      if (!ot_admin_get_sysroot_from_proc_cmdline (&rootdir, cancellable, error))
-        goto out;
-      if (rootdir == NULL)
-        {
-          g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
-                       "No ostree= kernel argument found");
-          goto out;
-        }
-    }
+  rootdir = g_file_new_for_path (argv[1]);
   
   if (!ostree_run_triggers_in_root (rootdir, cancellable, error))
     goto out;
diff --git a/src/ostree/ot-admin-functions.c b/src/ostree/ot-admin-functions.c
index e6903bb..6cc4ff0 100644
--- a/src/ostree/ot-admin-functions.c
+++ b/src/ostree/ot-admin-functions.c
@@ -182,39 +182,30 @@ ot_admin_get_previous_deployment (GFile           *ostree_dir,
 }
 
 gboolean
-ot_admin_get_sysroot_from_proc_cmdline (GFile        **out_deploy_target,
-                                        GCancellable  *cancellable,
-                                        GError       **error)
+ot_admin_get_default_ostree_dir (GFile        **out_ostree_dir,
+                                 GCancellable  *cancellable,
+                                 GError       **error)
 {
   gboolean ret = FALSE;
-  gs_unref_object GFile *proc_cmdline = g_file_new_for_path ("/proc/cmdline");
-  gs_unref_object GFile *ret_deploy_target = NULL;
-  gs_free char *contents = NULL;
-  gsize contents_len;
-  char **cmdline_argv = NULL;
-  char **iter;
-
-  if (!g_file_load_contents (proc_cmdline, cancellable, &contents, &contents_len, NULL,
-                             error))
-    goto out;
+  gs_unref_object GFile *possible_ostree_dir = NULL;
+  gs_unref_object GFile *ret_ostree_dir = NULL;
 
-  cmdline_argv = g_strsplit (contents, " ", -1);
-  
-  for (iter = cmdline_argv; *iter; iter++)
+  if (ret_ostree_dir == NULL)
     {
-      const char *arg = *iter;
-      if (strncmp (arg, "ostree=", 7) == 0)
-        {
-          gs_free char *subpath = g_strdup (arg + 7);
-          gs_unref_object GFile *deploydir = g_file_new_for_path ("/sysroot/ostree/deploy");
-          ret_deploy_target = g_file_resolve_relative_path (deploydir, subpath);
-          break;
-        }
+      g_clear_object (&possible_ostree_dir);
+      possible_ostree_dir = g_file_new_for_path ("/sysroot/ostree");
+      if (g_file_query_exists (possible_ostree_dir, NULL))
+        ret_ostree_dir = g_object_ref (possible_ostree_dir);
+    }
+  if (ret_ostree_dir == NULL)
+    {
+      g_clear_object (&possible_ostree_dir);
+      possible_ostree_dir = g_file_new_for_path ("/ostree");
+      if (g_file_query_exists (possible_ostree_dir, NULL))
+        ret_ostree_dir = g_object_ref (possible_ostree_dir);
     }
 
   ret = TRUE;
-  ot_transfer_out_value (out_deploy_target, &ret_deploy_target);
- out:
-  g_strfreev (cmdline_argv);
+  ot_transfer_out_value (out_ostree_dir, &ret_ostree_dir);
   return ret;
 }
diff --git a/src/ostree/ot-admin-functions.h b/src/ostree/ot-admin-functions.h
index 766a3e3..c189b24 100644
--- a/src/ostree/ot-admin-functions.h
+++ b/src/ostree/ot-admin-functions.h
@@ -42,9 +42,9 @@ gboolean ot_admin_get_previous_deployment (GFile           *ostree_dir,
                                            GCancellable    *cancellable,
                                            GError         **error);
 
-gboolean ot_admin_get_sysroot_from_proc_cmdline (GFile        **out_deploy_target,
-                                                 GCancellable  *cancellable,
-                                                 GError       **error);
+gboolean ot_admin_get_default_ostree_dir (GFile        **out_ostree_dir,
+                                          GCancellable  *cancellable,
+                                          GError       **error);
 
 G_END_DECLS
 
diff --git a/src/ostree/ot-builtin-admin.c b/src/ostree/ot-builtin-admin.c
index 1f23647..c8f60fb 100644
--- a/src/ostree/ot-builtin-admin.c
+++ b/src/ostree/ot-builtin-admin.c
@@ -24,13 +24,14 @@
 
 #include "ot-builtins.h"
 #include "ot-admin-builtins.h"
+#include "ot-admin-functions.h"
 #include "ot-main.h"
 #include "ostree.h"
 #include "ostree-repo-file.h"
 
 #include <glib/gi18n.h>
 
-static char *opt_ostree_dir = "/ostree";
+static char *opt_ostree_dir = NULL;
 static char *opt_boot_dir = "/boot";
 
 static GOptionEntry options[] = {
@@ -116,7 +117,15 @@ ostree_builtin_admin (int argc, char **argv, GFile *repo_path, GError **error)
       goto out;
     }
 
-  ostree_dir = g_file_new_for_path (opt_ostree_dir);
+  if (opt_ostree_dir != NULL)
+    {
+      ostree_dir = g_file_new_for_path (opt_ostree_dir);
+    }
+  else
+    {
+      if (!ot_admin_get_default_ostree_dir (&ostree_dir, cancellable, error))
+        goto out;
+    }
   boot_dir = g_file_new_for_path (opt_boot_dir);
 
   ostree_prep_builtin_argv (subcommand_name, argc-2, argv+2, &subcmd_argc, &subcmd_argv);