From 4d325f19d851ca7aaf6b3396376ca9ef14195e2f Mon Sep 17 00:00:00 2001
From: Mika <kontakt@donau2space.de>
Date: Wed, 14 Jan 2026 15:28:05 +0000
Subject: [PATCH] Add trace_agg/src/trace_agg/cli.py

---
 trace_agg/src/trace_agg/cli.py | 62 ++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 trace_agg/src/trace_agg/cli.py

diff --git a/trace_agg/src/trace_agg/cli.py b/trace_agg/src/trace_agg/cli.py
new file mode 100644
index 0000000..108cb7d
--- /dev/null
+++ b/trace_agg/src/trace_agg/cli.py
@@ -0,0 +1,62 @@
+import argparse
+import json
+import sys
+from pathlib import Path
+from typing import Any
+
+from trace_agg import core
+
+
+def _validate_file_path(path_str: str, must_exist: bool = True) -> Path:
+    path = Path(path_str)
+    if must_exist and not path.is_file():
+        raise FileNotFoundError(f"Eingabedatei nicht gefunden: {path}")
+    return path
+
+
+def main() -> None:
+    """CLI-Einstiegspunkt zur Aggregation von eBPF-Tracedaten."""
+    parser = argparse.ArgumentParser(
+        description="Aggregiere eBPF-Tracedaten pro correlation_id und speichere eine zusammengefasste JSON-Ausgabe."
+    )
+    parser.add_argument(
+        "--input",
+        required=True,
+        help="Pfad zur Eingabedatei mit Tracedaten im JSON-Format."
+    )
+    parser.add_argument(
+        "--output",
+        required=True,
+        help="Pfad zur Ausgabedatei für das aggregierte JSON."
+    )
+
+    args = parser.parse_args()
+
+    try:
+        input_path = _validate_file_path(args.input)
+        output_path = Path(args.output)
+
+        with input_path.open("r", encoding="utf-8") as f:
+            trace_data = json.load(f)
+
+        correlation_ids = trace_data.keys() if isinstance(trace_data, dict) else []
+        if not correlation_ids:
+            raise ValueError("Keine Correlation-IDs in der Eingabedatei gefunden.")
+
+        aggregated_results: dict[str, Any] = {}
+        for cid in correlation_ids:
+            aggregated_results[cid] = core.aggregate_trace_data(cid)
+
+        output_path.parent.mkdir(parents=True, exist_ok=True)
+        with output_path.open("w", encoding="utf-8") as out:
+            json.dump(aggregated_results, out, indent=2)
+
+        print(f"Aggregierte Ergebnisse gespeichert in: {output_path}")
+
+    except Exception as exc:
+        print(f"Fehler bei der Ausführung: {exc}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()