[ostree] libostree: Improve commit filter API

[Colin Walters <walters src gnome org>]

commit 6c61b1910714c5bde7f35594ab7fcd980d03c8f1
Author: Colin Walters <walters verbum org>
Date:   Sat Aug 17 14:19:37 2013 -0400

    libostree: Improve commit filter API
    
    Make the structure private, and document the flags.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=706214

 src/libostree/ostree-repo.c    |   22 +++++++++++++++++++---
 src/libostree/ostree-repo.h    |   26 ++++++++++++++------------
 src/ostree/ot-builtin-commit.c |    8 ++++----
 3 files changed, 37 insertions(+), 19 deletions(-)
---
diff --git a/src/libostree/ostree-repo.c b/src/libostree/ostree-repo.c
index f571989..d88a388 100644
--- a/src/libostree/ostree-repo.c
+++ b/src/libostree/ostree-repo.c
@@ -1534,6 +1534,14 @@ create_tree_variant_from_hashes (GHashTable            *file_checksums,
   return serialized_tree;
 }
 
+struct OstreeRepoCommitModifier {
+  volatile gint refcount;
+
+  OstreeRepoCommitModifierFlags flags;
+  OstreeRepoCommitFilter filter;
+  gpointer user_data;
+};
+
 static OstreeRepoCommitFilterResult
 apply_commit_filter (OstreeRepo            *self,
                      OstreeRepoCommitModifier *modifier,
@@ -1627,7 +1635,7 @@ stage_directory_to_mtree_internal (OstreeRepo                  *self,
       if (filter_result == OSTREE_REPO_COMMIT_FILTER_ALLOW)
         {
           g_debug ("Adding: %s", gs_file_get_path_cached (dir));
-          if (!(modifier && modifier->skip_xattrs))
+          if (!(modifier && (modifier->flags & OSTREE_REPO_COMMIT_MODIFIER_FLAGS_SKIP_XATTRS) > 0))
             {
               if (!ostree_get_xattrs_for_file (dir, &xattrs, cancellable, error))
                 goto out;
@@ -1722,7 +1730,7 @@ stage_directory_to_mtree_internal (OstreeRepo                  *self,
                             goto out;
                         }
 
-                      if (!(modifier && modifier->skip_xattrs))
+                      if (!(modifier && (modifier->flags & OSTREE_REPO_COMMIT_MODIFIER_FLAGS_SKIP_XATTRS) > 
0))
                         {
                           g_clear_pointer (&xattrs, (GDestroyNotify) g_variant_unref);
                           if (!ostree_get_xattrs_for_file (child, &xattrs, cancellable, error))
@@ -1875,15 +1883,23 @@ ostree_repo_stage_mtree (OstreeRepo           *self,
 
 /**
  * ostree_repo_commit_modifier_new:
+ * @flags: Control options for filter
+ * @commit_filter: (allow-none): Function that can inspect individual files
+ * @user_data: (allow-none): User data
  *
  * Returns: (transfer full): A new commit modifier.
  */
 OstreeRepoCommitModifier *
-ostree_repo_commit_modifier_new (void)
+ostree_repo_commit_modifier_new (OstreeRepoCommitModifierFlags  flags,
+                                 OstreeRepoCommitFilter         commit_filter,
+                                 gpointer                       user_data)
 {
   OstreeRepoCommitModifier *modifier = g_new0 (OstreeRepoCommitModifier, 1);
 
   modifier->refcount = 1;
+  modifier->flags = flags;
+  modifier->filter = commit_filter;
+  modifier->user_data = user_data;
 
   return modifier;
 }
diff --git a/src/libostree/ostree-repo.h b/src/libostree/ostree-repo.h
index 287975f..9562f30 100644
--- a/src/libostree/ostree-repo.h
+++ b/src/libostree/ostree-repo.h
@@ -251,23 +251,25 @@ typedef OstreeRepoCommitFilterResult (*OstreeRepoCommitFilter) (OstreeRepo    *r
                                                                 gpointer       user_data);
 
 /**
+ * OstreeRepoCommitModifierFlags:
+ * @OSTREE_REPO_COMMIT_MODIFIER_FLAGS_NONE: No special flags
+ * @OSTREE_REPO_COMMIT_MODIFIER_FLAGS_SKIP_XATTRS: Do not process extended attributes
+ */
+typedef enum {
+  OSTREE_REPO_COMMIT_MODIFIER_FLAGS_NONE = 0,
+  OSTREE_REPO_COMMIT_MODIFIER_FLAGS_SKIP_XATTRS = (1 << 0)
+} OstreeRepoCommitModifierFlags;
+
+/**
  * OstreeRepoCommitModifier:
  *
  * A structure allowing control over commits.
  */
-typedef struct {
-  volatile gint refcount;
-
-  guint reserved_flags : 31;
-  guint skip_xattrs : 1;
-
-  OstreeRepoCommitFilter filter;
-  gpointer user_data;
-
-  gpointer reserved[3];
-} OstreeRepoCommitModifier;
+typedef struct OstreeRepoCommitModifier OstreeRepoCommitModifier;
 
-OstreeRepoCommitModifier *ostree_repo_commit_modifier_new (void);
+OstreeRepoCommitModifier *ostree_repo_commit_modifier_new (OstreeRepoCommitModifierFlags  flags,
+                                                           OstreeRepoCommitFilter         commit_filter,
+                                                           gpointer                       user_data);
 
 GType ostree_repo_commit_modifier_get_type (void);
 
diff --git a/src/ostree/ot-builtin-commit.c b/src/ostree/ot-builtin-commit.c
index b29c229..6fffc39 100644
--- a/src/ostree/ot-builtin-commit.c
+++ b/src/ostree/ot-builtin-commit.c
@@ -194,10 +194,10 @@ ostree_builtin_commit (int argc, char **argv, GFile *repo_path, GCancellable *ca
   if (opt_owner_uid >= 0 || opt_owner_gid >= 0 || opt_statoverride_file != NULL
       || opt_no_xattrs)
     {
-      modifier = ostree_repo_commit_modifier_new ();
-      modifier->skip_xattrs = opt_no_xattrs;
-      modifier->filter = commit_filter;
-      modifier->user_data = mode_adds;
+      OstreeRepoCommitModifierFlags flags = 0;
+      if (opt_no_xattrs)
+        flags |= OSTREE_REPO_COMMIT_MODIFIER_FLAGS_SKIP_XATTRS;
+      modifier = ostree_repo_commit_modifier_new (flags, commit_filter, mode_adds);
     }
 
   if (!ostree_repo_resolve_rev (repo, opt_branch, TRUE, &parent, error))