Fix false valued variables

.bluish/bluish.yaml

@@ -1,6 +1,6 @@
 
 var:
-  project_version: "0.7.2"
+  project_version: "0.7.3"
   python_version: "3.12"
 
 jobs:

src/bluish/contexts/__init__.py

@@ -197,10 +197,14 @@ def prepare_value(value: Any) -> Any:
         member_result = _try_get_value(ctx, f".{name}", raw=raw)
         var_result = _try_get_value(ctx, f"var.{name}", raw=raw)
 
-        if var_result and member_result:
+        if var_result is not None and member_result is not None:
             raise ValueError(f"Ambiguous value reference: {name}")
+        elif var_result is not None:
+            return var_result
+        elif member_result is not None:
+            return member_result
         else:
-            return var_result or member_result or None
+            return None
 
     root, varname = name.split(".", maxsplit=1)
 
@@ -354,7 +358,7 @@ def can_dispatch(context: InputOutputNode) -> bool:
         return context.attrs._if
     elif not isinstance(context.attrs._if, str):
         raise ValueError("Condition must be a bool or a string")
-
+    print(context.expand_expr(context.attrs._if))
     return bool(context.expand_expr(context.attrs._if))
 
 

test/test_core.py

@@ -176,6 +176,10 @@ def test_depends_on_ignored() -> None:
 
 def test_conditions() -> None:
     wf = create_workflow("""
+var:
+    true_var: true
+    false_var: false
+
 jobs:
     # check == false at the job level
     job1:
@@ -201,7 +205,7 @@ def test_conditions() -> None:
     job4:
         name: "Job 4"
         steps:
-            - if: ${{ true }}
+            - if: ${{ true_var }}
               shell: python
               run: |
                 print("This is Job 4")
@@ -210,7 +214,7 @@ def test_conditions() -> None:
     job5:
         name: "Job 5"
         steps:
-            - if: ${{ false }}
+            - if: ${{ false_var }}
               shell: python
               run: |
                 print("This will not be printed")