Add normalization for pub packages

Signed-off-by: Tushar Goel <[email protected]>

Author: TG1999

src/packageurl/__init__.py

@@ -188,12 +188,15 @@ def normalize_name(
         "apk",
         "bitnami",
         "hex",
+        "pub",
     ):
         name_str = name_str.lower()
     if ptype == "pypi":
         name_str = name_str.replace("_", "-").lower()
     if ptype == "hackage":
         name_str = name_str.replace("_", "-")
+    if ptype == "pub":
+        name_str = re.sub(r"[^a-z0-9]", "_", name_str.lower())
     return name_str or None
 
 

src/packageurl/validate.py

@@ -552,13 +552,13 @@ class PubTypeValidator(TypeValidator):
     def validate_type(cls, purl, strict=False):
         if not all(c.isalnum() or c == "_" for c in purl.name):
             yield ValidationMessage(
-                severity=ValidationSeverity.ERROR,
+                severity=ValidationSeverity.WARNING,
                 message=f"Name contains invalid characters but should only contain letters, digits, or underscores for purl type: {cls.type!r}",
             )
 
         if " " in purl.name:
             yield ValidationMessage(
-                severity=ValidationSeverity.ERROR,
+                severity=ValidationSeverity.WARNING,
                 message=f"Name contains spaces but should use underscores instead for purl type: {cls.type!r}",
             )
         messages = super().validate_type(purl, strict)