improve error message for 1.0 lockfile format

iterative · Jul 11, 2023 · b6de85f · b6de85f
1 parent 1b2291c
commit b6de85f
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/dvc/schema.py b/dvc/schema.py
@@ -42,9 +42,10 @@
     StageParams.PARAM_OUTS: [DATA_SCHEMA],
 }
 
+NO_SCHEMA_MSG = "This is a 1.0 lockfile format which is unsupported in dvc>=3.0"
 LOCKFILE_STAGES_SCHEMA = {str: LOCK_FILE_STAGE_SCHEMA}
 LOCKFILE_SCHEMA = {
-    Required("schema"): Equal("2.0", "invalid schema version"),
+    Required("schema", NO_SCHEMA_MSG): Equal("2.0", "invalid schema version"),
     STAGES: LOCKFILE_STAGES_SCHEMA,
 }