Allow generation of metrics.json simply by accessing the artifacts folder.

report_generator/commands/generate.py

@@ -5,17 +5,19 @@ command that demands a database host in order to read a directory is a command n
 that. What they share is everything after the artifacts are in hand, which is :func:`_report`.
 """
 
+import json
 from pathlib import Path
 from uuid import UUID
 
 from pydantic import BaseModel, Field
 
-from cc_common.api import PipelineError, context
-from cc_common.utils import print
+from ..vendor.cc_common.api import PipelineError, context
+from ..vendor.cc_common.utils import print
 
 # Imported for the properties model; the store half of the tool is the only part that needs it.
-from persistent_storage.shared import StorageConfiguration
+from ..vendor.persistent_storage.shared import StorageConfiguration
 
+from ..metrics import build_metrics
 from ..rendering import render
 from ..sources import ReportSources, collect, collect_from_directory
 
@@ -105,10 +107,10 @@ def from_folder(properties: FolderProperties) -> GeneratedReport:
         PipelineError: The folder cannot be read, names no scan, is missing an
             input the report needs, or the destination cannot be written.
     """
-    return _report(collect_from_directory(properties.artifacts, properties.scan_id), properties.path)
+    return _report(collect_from_directory(properties.artifacts, properties.scan_id), properties.path, write_metrics=True)
 
 
-def _report(sources: ReportSources, path: Path | None) -> GeneratedReport:
+def _report(sources: ReportSources, path: Path | None, *, write_metrics: bool = False) -> GeneratedReport:
     """Render the collected artifacts and write the result.
 
     Everything after the artifacts are in hand, which is the same whichever of the two collected
@@ -130,6 +132,10 @@ def _report(sources: ReportSources, path: Path | None) -> GeneratedReport:
     try:
         destination.parent.mkdir(parents=True, exist_ok=True)
         destination.write_bytes(content)
+        if write_metrics:
+            (destination.parent / "metrics.json").write_text(
+                json.dumps(build_metrics(sources), indent=2), encoding="utf-8"
+            )
     except OSError as error:
         message = f"Cannot write the report to '{destination}': {error}"