snyk: added snyk stats to metadata

Related: https://issues.redhat.com/browse/OSH-347
Reproducer: csmock -t snyk --force -r rhel-8-x86_64 osbuild-106-1.el10+4.src.rpm

Added the stats from snyk results (snyk coverage rate, analyzed files and total of files) to the metadata file.

py/common/snyk.py

@@ -0,0 +1,33 @@
+# standard imports
+import json
+
+
+def snyk_write_analysis_meta(results, results_file):
+    try:
+        with open(results_file) as snyk_results_file:
+            data = json.load(snyk_results_file)
+            coverage_stats = data["runs"][0]["properties"]["coverage"]
+            total_files = 0
+            supported_files = 0
+            for lang in coverage_stats:
+                total_files += lang["files"]
+                if lang["type"] == "SUPPORTED":
+                    supported_files += lang["files"]
+
+            coverage_ratio = 0
+            if total_files > 0:
+                coverage_ratio = int(supported_files * 100 / total_files)
+
+            results.ini_writer.append("snyk-scanned-files-coverage", coverage_ratio)
+            results.ini_writer.append("snyk-scanned-files-success", supported_files)
+            results.ini_writer.append("snyk-scanned-files-total", total_files)
+
+            return 0
+
+    except OSError as e:
+        results.error(f"snyk-scan: snyk-results.sarif file not found: {e}")
+        return 1
+
+    except KeyError as e:
+        results.error(f"snyk-scan: error parsing results from snyk-results.sarif file: {e}")
+        return 1

py/plugins/snyk.py

@@ -17,6 +17,8 @@
 
 import os
 
+from csmock.common.snyk import snyk_write_analysis_meta
+
 
 # default URL to download snyk binary executable
 SNYK_BIN_URL = "https://static.snyk.io/cli/latest/snyk-linux"
@@ -204,4 +206,8 @@ def filter_hook(results):
             cmd = FILTER_CMD % (src, dst)
             return results.exec_cmd(cmd, shell=True)
 
-        props.post_process_hooks += [filter_hook]
+        def write_snyk_stats_metadata(results):
+            results_file = results.dbgdir_raw + SNYK_OUTPUT
+            return snyk_write_analysis_meta(results, results_file)
+
+        props.post_process_hooks += [write_snyk_stats_metadata, filter_hook]