Fix relative log paths in FOM and success criteria definitions

lib/ramble/ramble/application.py

@@ -2062,6 +2062,11 @@ def _analysis_dicts(self, criteria_list):
         # Extract file paths for all criteria
         for criteria in criteria_list.all_criteria():
             log_path = self.expander.expand_var(criteria.file)
+
+            # Ensure log path is absolute. If not, prepend the experiment run directory
+            if not os.path.isabs(log_path) and self.expander.experiment_run_dir not in log_path:
+                log_path = os.path.join(self.expander.experiment_run_dir, log_path)
+
             if log_path not in files and os.path.exists(log_path):
                 files[log_path] = self._new_file_dict()
 
@@ -2094,6 +2099,10 @@ def _analysis_dicts(self, criteria_list):
         for fom, conf in fom_definitions.items():
             log_path = self.expander.expand_var(conf["log_file"])
 
+            # Ensure log path is absolute. If not, prepend the experiment run directory
+            if not os.path.isabs(log_path) and self.expander.experiment_run_dir not in log_path:
+                log_path = os.path.join(self.expander.experiment_run_dir, log_path)
+
             if log_path not in files:
                 files[log_path] = self._new_file_dict()
 

lib/ramble/ramble/test/end_to_end/fom_log_file_path.py

@@ -0,0 +1,59 @@
+# Copyright 2022-2025 The Ramble Authors
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+import os
+
+import pytest
+
+import ramble.workspace
+import ramble.config
+import ramble.software_environments
+from ramble.main import RambleCommand
+
+
+# everything here uses the mock_workspace_path
+pytestmark = pytest.mark.usefixtures(
+    "mutable_config", "mutable_mock_workspace_path", "mock_applications"
+)
+
+on = RambleCommand("on")
+workspace = RambleCommand("workspace")
+
+
+def test_relative_fom_log_works(mutable_config, mutable_mock_workspace_path, request):
+    workspace_name = request.node.name
+
+    global_args = ["-w", workspace_name]
+
+    ws = ramble.workspace.create(workspace_name)
+    workspace(
+        "manage",
+        "experiments",
+        "fom-log-path",
+        "-v",
+        "n_nodes=1",
+        "-v",
+        "n_ranks=1",
+        "-v",
+        "batch_submit={execute_experiment}",
+        global_args=global_args,
+    )
+    ws._re_read()
+
+    workspace("setup", global_args=global_args)
+
+    on(global_args=global_args)
+
+    workspace("analyze", global_args=global_args)
+
+    with open(os.path.join(ws.root, "results.latest.txt")) as f:
+        data = f.read()
+
+        assert "FAILED" not in data
+        assert "SUCCESS" in data
+        assert "test_fom = test" in data

var/ramble/repos/builtin.mock/applications/fom-log-path/application.py

@@ -0,0 +1,34 @@
+# Copyright 2022-2025 The Ramble Authors
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+from ramble.appkit import *
+
+
+class FomLogPath(ExecutableApplication):
+    name = "fom-log-path"
+
+    executable(
+        "write-fom", "echo 'fom: test'", redirect="log.file", use_mpi=False
+    )
+
+    workload("test", executable="write-fom")
+
+    figure_of_merit(
+        "test_fom",
+        fom_regex=r"fom: (?P<test>.*)",
+        group_name="test",
+        log_file="log.file",
+        units="",
+    )
+
+    success_criteria(
+        "found_test",
+        mode="string",
+        match=r"fom: test",
+        file="log.file",
+    )