Show all files that are not produced by a task.

docs/source/changes.md

@@ -12,6 +12,8 @@ releases are available on [PyPI](https://pypi.org/project/pytask) and
 - {pull}`283` fixes an issue with coverage and tests using pexpect + `pdb.set_trace()`.
 - {pull}`285` implements that pytask does not show the traceback of tasks which are
   skipped because its previous task failed. Fixes {issue}`284`.
+- {pull}`287` changes that all files that are not produced by a task are displayed in
+  the error message. Fixes {issue}`262`.
 
 ## 0.2.3 - 2022-05-30
 

src/_pytask/execute.py

@@ -11,6 +11,7 @@
 from _pytask.console import console
 from _pytask.console import create_summary_panel
 from _pytask.console import create_url_style_for_task
+from _pytask.console import format_strings_as_flat_tree
 from _pytask.console import format_task_id
 from _pytask.console import unify_styles
 from _pytask.dag import descending_tasks
@@ -27,6 +28,7 @@
 from _pytask.report import ExecutionReport
 from _pytask.session import Session
 from _pytask.shared import get_first_non_none_value
+from _pytask.shared import reduce_node_name
 from _pytask.traceback import format_exception_without_traceback
 from _pytask.traceback import remove_traceback_from_exc_info
 from _pytask.traceback import render_exc_info
@@ -167,15 +169,23 @@ def pytask_execute_task(task: Task) -> bool:
 
 @hookimpl
 def pytask_execute_task_teardown(session: Session, task: Task) -> None:
-    """Check if each produced node was indeed produced."""
+    """Check if :class:`_pytask.nodes.FilePathNode` are produced by a task."""
+    missing_nodes = []
     for product in session.dag.successors(task.name):
         node = session.dag.nodes[product]["node"]
-        try:
-            node.state()
-        except NodeNotFoundError as e:
-            raise NodeNotFoundError(
-                f"{node.name} was not produced by {task.name}."
-            ) from e
+        if isinstance(node, FilePathNode):
+
+            try:
+                node.state()
+            except NodeNotFoundError:
+                missing_nodes.append(node)
+
+    if missing_nodes:
+        paths = [reduce_node_name(i, session.config["paths"]) for i in missing_nodes]
+        formatted = format_strings_as_flat_tree(
+            paths, "The task did not produce the following files:\n", ""
+        )
+        raise NodeNotFoundError(formatted)
 
 
 @hookimpl(trylast=True)

tests/test_execute.py

@@ -36,6 +36,25 @@ def task_example():
     assert isinstance(session.execution_reports[0].exc_info[1], NodeNotFoundError)
 
 
+@pytest.mark.end_to_end
+def test_task_did_not_produce_multiple_nodes_and_all_are_shown(runner, tmp_path):
+    source = """
+    import pytask
+
+    @pytask.mark.produces(["1.txt", "2.txt"])
+    def task_example():
+        pass
+    """
+    tmp_path.joinpath("task_module.py").write_text(textwrap.dedent(source))
+
+    result = runner.invoke(cli, [tmp_path.as_posix()])
+
+    assert result.exit_code == ExitCode.FAILED
+    assert "NodeNotFoundError" in result.output
+    assert "1.txt" in result.output
+    assert "2.txt" in result.output
+
+
 @pytest.mark.end_to_end
 def test_node_not_found_in_task_setup(tmp_path):
     """Test for :class:`_pytask.exceptions.NodeNotFoundError` in task setup.