libpriv/util: Factor out function to get version

Will be used by the history work.

Closes: #1823
Approved by: mike-nguyen

src/libpriv/rpmostree-core.c

@@ -3544,21 +3544,6 @@ apply_rpmfi_overrides (RpmOstreeContext *self,
   return TRUE;
 }
 
-/* FIXME: This is a copy of ot_admin_checksum_version */
-static char *
-checksum_version (GVariant *checksum)
-{
-  g_autoptr(GVariant) metadata = NULL;
-  const char *ret = NULL;
-
-  metadata = g_variant_get_child_value (checksum, 0);
-
-  if (!g_variant_lookup (metadata, "version", "&s", &ret))
-    return NULL;
-
-  return g_strdup (ret);
-}
-
 static gboolean
 add_install (RpmOstreeContext *self,
              DnfPackage       *pkg,
@@ -4357,7 +4342,7 @@ rpmostree_context_commit (RpmOstreeContext      *self,
         if (!ostree_repo_load_commit (self->ostreerepo, parent, &commit, NULL, error))
           return FALSE;
 
-        parent_version = checksum_version (commit);
+        parent_version = rpmostree_checksum_version (commit);
 
         /* copy the version tag */
         if (parent_version)

src/libpriv/rpmostree-util.c

@@ -374,6 +374,21 @@ rpmostree_str_replace (const char  *buf,
   return g_regex_replace_literal (regex, buf, -1, 0, new, 0, error);
 }
 
+/* FIXME: This is a copy of ot_admin_checksum_version */
+char *
+rpmostree_checksum_version (GVariant *checksum)
+{
+  g_autoptr(GVariant) metadata = NULL;
+  const char *ret = NULL;
+
+  metadata = g_variant_get_child_value (checksum, 0);
+
+  if (!g_variant_lookup (metadata, "version", "&s", &ret))
+    return NULL;
+
+  return g_strdup (ret);
+}
+
 static gboolean
 pull_content_only_recurse (OstreeRepo  *dest,
                            OstreeRepo  *src,

src/libpriv/rpmostree-util.h

@@ -88,6 +88,8 @@ rpmostree_str_replace (const char  *buf,
                        const char  *new,
                        GError     **error);
 
+char *
+rpmostree_checksum_version (GVariant *checksum);
 
 gboolean
 rpmostree_pull_content_only (OstreeRepo  *dest,