refactor: move ext_ref relpath helper to CycloneDxSupport

Author: gernot-h

capycli/bom/download_sources.py

@@ -121,29 +121,20 @@ def download_sources(self, sbom: Bom, source_folder: str) -> None:
                 if new:
                     component.external_references.add(ext_ref)
 
-    def have_relative_ext_ref_path(self, ext_ref: ExternalReference, bompath: str):
-        bip = pathlib.PurePath(ext_ref.url)
-        try:
-            file = bip.as_posix()
-            if os.path.isfile(file):
-                ext_ref.url = "file://" + bip.relative_to(bompath).as_posix()
-        except ValueError:
-            print_yellow(
-                "  SBOM file is not relative to source file " + ext_ref.url)
-
-        return bip.name
-
     def update_local_path(self, sbom: Bom, bomfile: str):
         bompath = pathlib.Path(bomfile).parent
         for component in sbom.components:
             ext_ref = CycloneDxSupport.get_ext_ref(
                 component, ExternalReferenceType.DISTRIBUTION, CaPyCliBom.SOURCE_FILE_COMMENT)
             if ext_ref:
-                name = self.have_relative_ext_ref_path(ext_ref, bompath)
-                CycloneDxSupport.update_or_set_property(
-                    component,
-                    CycloneDxSupport.CDX_PROP_FILENAME,
-                    name)
+                try:
+                    name = CycloneDxSupport.have_relative_ext_ref_path(ext_ref, bompath)
+                    CycloneDxSupport.update_or_set_property(
+                        component,
+                        CycloneDxSupport.CDX_PROP_FILENAME,
+                        name)
+                except ValueError:
+                    print_yellow("  SBOM file is not relative to source file " + ext_ref.url)
 
     def run(self, args):
         """Main method

capycli/common/capycli_bom_support.py

@@ -9,6 +9,7 @@
 import json
 import os
 import tempfile
+import pathlib
 import uuid
 from datetime import datetime
 from enum import Enum
@@ -370,6 +371,14 @@ def update_or_set_ext_ref(comp: Component, type: ExternalReferenceType, comment:
         else:
             CycloneDxSupport.set_ext_ref(comp, type, comment, value)
 
+    @staticmethod
+    def have_relative_ext_ref_path(ext_ref: ExternalReference, rel_to: str):
+        bip = pathlib.PurePath(ext_ref.url)
+        file = bip.as_posix()
+        if os.path.isfile(file):
+            ext_ref.url = "file://" + bip.relative_to(rel_to).as_posix()
+        return bip.name
+
     @staticmethod
     def get_ext_ref_by_comment(comp: Component, comment: str) -> Any:
         for ext_ref in comp.external_references: