Fix tool exit order

docs/changes/2662.bugfix.rst

@@ -0,0 +1,2 @@
+Fix the order in which ``Tool`` runs final operations to fix an issue
+of provenance not being correctly recorded.

src/ctapipe/core/tests/test_tool.py

@@ -1,7 +1,10 @@
 import json
 import logging
 import os
+import signal
+import sys
 import tempfile
+from multiprocessing import Barrier, Process
 from pathlib import Path
 
 import pytest
@@ -487,3 +490,82 @@
     assert len(inputs) == 1
     assert inputs[0]["role"] == "Tool Configuration"
     assert inputs[0]["url"] == str(config_path)
+
+
+@pytest.mark.parametrize(
+    ("exit_code", "expected_status"),
+    [
+        (0, "completed"),
+        (None, "completed"),
+        (1, "error"),
+        (2, "error"),
+    ],
+)
+def test_exit_status(exit_code, expected_status, tmp_path, provenance):
+    """check that the config is correctly in the provenance"""
+
+    class MyTool(Tool):
+        exit_code = Int(allow_none=True, default_value=None).tag(config=True)
+
+        def start(self):
+            if self.exit_code is None:
+                return
+
+            if self.exit_code == 0:
+                sys.exit(0)
+
+            if self.exit_code == 1:
+                raise ValueError("Some error happened")
+
+            class CustomError(ValueError):
+                exit_code = self.exit_code
+
+            raise CustomError("Some error with specific code happened")
+
+    provenance_path = tmp_path / "provlog.json"
+    run_tool(
+        MyTool(exit_code=exit_code),
+        [f"--provenance-log={provenance_path}"],
+        raises=False,
+    )
+
+    activities = json.loads(provenance_path.read_text())
+    assert len(activities) == 1
+    provlog = activities[0]
+    assert provlog["status"] == expected_status
+
+
+class InterruptTestTool(Tool):
+    name = "test-interrupt"
+
+    def __init__(self, barrier):
+        super().__init__()
+        self.barrier = barrier
+
+    def start(self):
+        self.barrier.wait()
+        signal.pause()
+
+
+def test_exit_status_interrupted(tmp_path, provenance):
+    """check that the config is correctly in the provenance"""
+
+    # to make sure we only kill the process once it is running
+    barrier = Barrier(2)
+    tool = InterruptTestTool(barrier)
+
+    provenance_path = tmp_path / "provlog.json"
+    args = [f"--provenance-log={provenance_path}", "--log-level=INFO"]
+    process = Process(target=run_tool, args=(tool, args), kwargs=dict(raises=False))
+    process.start()
+    barrier.wait()
+
+    # process.terminate()
+    os.kill(process.pid, signal.SIGINT)
+    process.join()
+
+    activities = json.loads(provenance_path.read_text())
+    assert len(activities) == 1
+    provlog = activities[0]
+    assert provlog["activity_name"] == InterruptTestTool.name
+    assert provlog["status"] == "interrupted"

src/ctapipe/core/tool.py

@@ -405,6 +405,7 @@ def run(self, argv=None, raises=False):
         # return codes are taken from:
         #  https://tldp.org/LDP/abs/html/exitcodes.html
 
+        status = "completed"
         exit_status = 0
         current_exception = None
 
@@ -430,51 +431,42 @@ def run(self, argv=None, raises=False):
 
                 self.start()
                 self.finish()
-                self.log.info("Finished: %s", self.name)
-                Provenance().finish_activity(activity_name=self.name)
             except (ToolConfigurationError, TraitError) as err:
                 current_exception = err
                 self.log.error("%s", err)
                 self.log.error("Use --help for more info")
                 exit_status = 2  # wrong cmd line parameter
-                Provenance().finish_activity(
-                    activity_name=self.name, status="error", exit_code=exit_status
-                )
+                status = "error"
             except KeyboardInterrupt:
                 self.log.warning("WAS INTERRUPTED BY CTRL-C")
                 exit_status = 130  # Script terminated by Control-C
-                Provenance().finish_activity(
-                    activity_name=self.name, status="interrupted", exit_code=exit_status
-                )
+                status = "interrupted"
             except Exception as err:
                 current_exception = err
                 exit_status = getattr(err, "exit_code", 1)
+                status = "error"
                 self.log.exception("Caught unexpected exception: %s", err)
-                Provenance().finish_activity(
-                    activity_name=self.name, status="error", exit_code=exit_status
-                )
             except SystemExit as err:
                 exit_status = err.code
-                if exit_status == 0:
-                    # Finish normally
-                    Provenance().finish_activity(activity_name=self.name)
-                else:
-                    # Finish with error
+                if exit_status != 0:
+                    status = "error"
                     current_exception = err
                     self.log.critical(
                         "Caught SystemExit with exit code %s", exit_status
                     )
-                    Provenance().finish_activity(
-                        activity_name=self.name,
-                        status="error",
-                        exit_code=exit_status,
-                    )
             finally:
-                if not {"-h", "--help", "--help-all"}.intersection(self.argv):
-                    self.write_provenance()
                 if raises and current_exception:
+                    self.write_provenance()
                     raise current_exception
 
+        Provenance().finish_activity(
+            activity_name=self.name, status=status, exit_code=exit_status
+        )
+
+        if not {"-h", "--help", "--help-all"}.intersection(self.argv):
+            self.write_provenance()
+
+        self.log.info("Finished %s", self.name)
         self.exit(exit_status)
 
     def write_provenance(self):

src/ctapipe/tools/tests/test_process.py

@@ -3,6 +3,7 @@
 Test ctapipe-process on a few different use cases
 """
 
+import json
 from subprocess import CalledProcessError
 
 import astropy.units as u
@@ -160,17 +161,20 @@ def test_stage1_datalevels(tmp_path):
     assert isinstance(tool.event_source, DummyEventSource)
 
 
-def test_stage_2_from_simtel(tmp_path):
+def test_stage_2_from_simtel(tmp_path, provenance):
     """check we can go to DL2 geometry from simtel file"""
     config = resource_file("stage2_config.json")
     output = tmp_path / "test_stage2_from_simtel.DL2.h5"
 
+    provenance_log = tmp_path / "provenance.log"
+    input_path = get_dataset_path("gamma_prod5.simtel.zst")
     run_tool(
         ProcessorTool(),
         argv=[
             f"--config={config}",
-            "--input=dataset://gamma_prod5.simtel.zst",
+            f"--input={input_path}",
             f"--output={output}",
+            f"--provenance-log={provenance_log}",
             "--overwrite",
         ],
         cwd=tmp_path,
@@ -190,6 +194,18 @@ def test_stage_2_from_simtel(tmp_path):
         assert dl2["HillasReconstructor_telescopes"].dtype == np.bool_
         assert dl2["HillasReconstructor_telescopes"].shape[1] == len(subarray)
 
+    activities = json.loads(provenance_log.read_text())
+    assert len(activities) == 1
+
+    activity = activities[0]
+    assert activity["status"] == "completed"
+    assert len(activity["input"]) == 2
+    assert activity["input"][0]["url"] == str(config)
+    assert activity["input"][1]["url"] == str(input_path)
+
+    assert len(activity["output"]) == 1
+    assert activity["output"][0]["url"] == str(output)
+
 
 def test_stage_2_from_dl1_images(tmp_path, dl1_image_file):
     """check we can go to DL2 geometry from DL1 images"""