_project.py: Add BST_WORKSPACE_FORMAT_VERSION

1 files changed, 4 insertions, 3 deletions

diff --git a/buildstream/_project.py b/buildstream/_project.py
index 70c0a079f..f4a543b9d 100755
--- a/buildstream/_project.py
+++ b/buildstream/_project.py
@@ -40,6 +40,7 @@ from ._sourcefactory import SourceFactory
 # to the `project.conf` format or the core element format.
 #
 BST_FORMAT_VERSION = 4
+BST_WORKSPACE_FORMAT_VERSION = 1
 
 # The separator we use for user specified aliases
 _ALIAS_SEPARATOR = ':'
@@ -489,17 +490,17 @@ class Project():
                 element: {"path": config}
                 for element, config in _yaml.node_items(self._workspaces)
                 if element != "version"}
-            self._workspaces["version"] = 1
+            self._workspaces["version"] = BST_WORKSPACE_FORMAT_VERSION
             needs_rewrite = True
 
-        elif version == 1:
+        elif version == BST_WORKSPACE_FORMAT_VERSION:
             pass
 
         else:
             raise LoadError(LoadErrorReason.INVALID_DATA,
                             "Workspace configuration format version {} not supported."
                             "Your version of buildstream may be too old. Max supported version: {}"
-                            .format(version, 1))
+                            .format(version, BST_WORKSPACE_FORMAT_VERSION))
 
         if needs_rewrite:
             self._save_workspace_config()