loader.py: use the full name of the element when looking up a workspace

This fixes a bug where buildstream would ignore the opened workspace on a
cross-junction element.

2 files changed, 6 insertions, 3 deletions

diff --git a/src/buildstream/_loader/loader.py b/src/buildstream/_loader/loader.py
index a3af70f4b..9f881743d 100644
--- a/src/buildstream/_loader/loader.py
+++ b/src/buildstream/_loader/loader.py
@@ -281,7 +281,7 @@ class Loader:
 
         # if there's a workspace for this element then just append a dummy workspace
         # metasource.
-        workspace = self.load_context.context.get_workspaces().get_workspace(element.name)
+        workspace = self.load_context.context.get_workspaces().get_workspace(element.full_name)
         skip_workspace = True
         if workspace:
             workspace_node = {"kind": "workspace"}
diff --git a/tests/frontend/cross_junction_workspace.py b/tests/frontend/cross_junction_workspace.py
index 5e25d1fa8..c3b80ae0a 100644
--- a/tests/frontend/cross_junction_workspace.py
+++ b/tests/frontend/cross_junction_workspace.py
@@ -48,15 +48,18 @@ def prepare_junction_project(cli, tmpdir):
 
 def open_cross_junction(cli, tmpdir):
     project = prepare_junction_project(cli, tmpdir)
-    workspace = tmpdir.join("workspace")
-
     element = "sub.bst:data.bst"
+
+    oldkey = cli.get_element_key(project, element)
+
+    workspace = tmpdir.join("workspace")
     args = ["workspace", "open", "--directory", str(workspace), element]
     result = cli.run(project=project, args=args)
     result.assert_success()
 
     assert cli.get_element_state(project, element) == "buildable"
     assert os.path.exists(str(workspace.join("hello.txt")))
+    assert cli.get_element_key(project, element) != oldkey
 
     return project, workspace