OutputHTML: Prioritize license_references from scan data

The `--license-references` cli argument enables collection and storge
of license reference data in output files. So as long as it was present
during the scan and any subsequent conversion the `license_references`
should not be empty.
In such cases, the license reference table shall be filled with the
already stored data.
Only if the `license_references` list is empty, should the licenses
be collected from the `license_db` as a fall back.

Signed-off-by: Jens Keim <jens.keim@forvia.com>

Author: pepper-jk

src/formattedcode/output_html.py

@@ -227,7 +227,7 @@ def generate_output(results, license_references, version, template):
                     'value': license_expression,
                 })
 
-                if license_expression not in licenses:
+                if not license_references and license_expression not in licenses:
                     license_object = get_licenses_db().get(license_expression)
                     if license_object != None:
                         licenses[license_expression] = license_object
@@ -248,8 +248,9 @@ def generate_output(results, license_references, version, template):
         if PACKAGES in scanned_file:
             converted_packages[path] = scanned_file[PACKAGES]
 
-    licenses = dict(sorted(licenses.items()))
-    license_references = list(licenses.values())
+    if not license_references:
+        licenses = dict(sorted(licenses.items()))
+        license_references = list(licenses.values())
 
     files = {
         'license_copyright': converted,