Record command executed in the stats file

Author: AlexTereshenkov

src/python/pants/goal/stats_aggregator.py

@@ -110,7 +110,7 @@ def __call__(
             # have an empty line between stats of different Pants invocations
             space = "\n\n" if Path(self.output_file).exists() else ""
             output_lines.append(
-                f"{space}{timestamp} Executing goals: {','.join(context._run_tracker.goals)}"
+                f"{space}{timestamp} Command: {context.run_tracker.run_information().get('cmd_line')}"
             )
 
         if self.log:

src/python/pants/goal/stats_aggregator_integration_test.py

@@ -51,26 +51,29 @@ def test_warn_if_no_histograms() -> None:
 
 def test_writing_to_output_file() -> None:
     with setup_tmpdir({"src/py/app.py": "print(0)\n", "src/py/BUILD": "python_sources()"}):
-        argv = [
+        argv1 = [
             "--backend-packages=['pants.backend.python']",
             "--stats-log",
             "--stats-memory-summary",
             "--stats-output-file=stats.txt",
             "roots",
         ]
-        run_pants(argv).assert_success()
-        argv = [
+        run_pants(argv1).assert_success()
+        argv2 = [
             "--backend-packages=['pants.backend.python']",
             "--stats-log",
             "--stats-memory-summary",
             "--stats-output-file=stats.txt",
             "list",
             "::",
         ]
-        run_pants(argv).assert_success()
+        run_pants(argv2).assert_success()
         output_file_contents = Path("stats.txt").read_text()
         for item in ("Counters:", "Memory summary"):
             assert output_file_contents.count(item) == 2
 
         for item in ("roots", "list"):
             assert item in output_file_contents
+
+        for cmd in (argv1, argv2):
+            assert " ".join(cmd) in output_file_contents