Add code and tests to handle cocoapods PURL with no name #143

Reference: #143

Signed-off-by: John M. Horan <johnmhoran@gmail.com>

Author: johnmhoran

src/packageurl/contrib/purl2url.py

@@ -24,6 +24,7 @@
 # Visit https://github.com/package-url/packageurl-python for support and
 # download.
 
+
 from packageurl import PackageURL
 from packageurl.contrib.route import NoRouteAvailable
 from packageurl.contrib.route import Router
@@ -75,7 +76,12 @@ def get_download_url(purl):
         return download_url
 
     # Fallback on the `download_url` qualifier when available.
-    purl_data = PackageURL.from_string(purl)
+    purl_data = None
+    try:
+        purl_data = PackageURL.from_string(purl)
+    except Exception as e:
+        print(f"An error occurred in get_download_url(): {e}")
+        return
     return purl_data.qualifiers.get("download_url", None)
 
 
@@ -309,13 +315,18 @@ def build_cocoapods_repo_url(purl):
     """
     Return a CocoaPods repo URL from the `purl` string.
     """
-    purl_data = PackageURL.from_string(purl)
-    name = purl_data.name
-
-    if name:
-        repository_homepage_url = f"https://cocoapods.org/pods/{name}"
+    purl_data = None
+    name = None
+    try:
+        purl_data = PackageURL.from_string(purl)
+        name = purl_data.name
+    except Exception as e:
+        print(f"An error occurred in build_cocoapods_repo_url(): {e}")
+        return
 
-    return repository_homepage_url
+    if not name:
+        return
+    return f"https://cocoapods.org/pods/{name}"
 
 
 # Download URLs:

tests/contrib/test_purl2url.py

@@ -66,6 +66,7 @@ def test_purl2url_get_repo_url():
         "pkg:golang/gopkg.in/ldap.v3@v3.1.0": "https://pkg.go.dev/gopkg.in/ldap.v3@v3.1.0",
         "pkg:cocoapods/AFNetworking@4.0.1": "https://cocoapods.org/pods/AFNetworking",
         "pkg:cocoapods/MapsIndoors@3.24.0": "https://cocoapods.org/pods/MapsIndoors",
+        "pkg:cocoapods/": None,
     }
 
     for purl, url in purls_url.items():
@@ -140,6 +141,7 @@ def test_purl2url_get_inferred_urls():
             "https://pypi.org/project/sortedcontainers/2.4.0/"
         ],
         "pkg:cocoapods/AFNetworking@4.0.1": ["https://cocoapods.org/pods/AFNetworking"],
+        "pkg:cocoapods/": [],
         "pkg:composer/psr/log@1.1.3": ["https://packagist.org/packages/psr/log#1.1.3"],
         "pkg:rubygems/package-name": ["https://rubygems.org/gems/package-name"],
         "pkg:bitbucket/birkenfeld": [],