Add Maven support for purl2url: Add support of classifier as classifier

Author: fafanoulele

src/packageurl/contrib/purl2url.py

@@ -406,8 +406,14 @@ def build_maven_download_url(purl):
     if purl_data.qualifiers and "type" in purl_data.qualifiers:
        maven_type = purl_data.qualifiers["type"]
 
+    classifier = None
+    if purl_data.qualifiers and "classifier" in purl_data.qualifiers:
+        classifier = purl_data.qualifiers["classifier"]
+
     if namespace and name and version:
         maven_namespace = namespace.replace(".", "/")
+        if classifier:
+            return f"{base_url}/{maven_namespace}/{name}/{version}/{name}-{version}-{classifier}.{maven_type}"
         return f"{base_url}/{maven_namespace}/{name}/{version}/{name}-{version}.{maven_type}"
 
 

tests/contrib/test_purl2url.py

@@ -96,6 +96,7 @@ def test_purl2url_get_download_url():
         "pkg:maven/org.apache.commons/[email protected]": "https://repo.maven.apache.org/maven2/org/apache/commons/commons-io/1.3.2/commons-io-1.3.2.jar",
         "pkg:maven/org.apache.commons/[email protected]?repository_url=https://repo1.maven.org/maven2": "https://repo1.maven.org/maven2/org/apache/commons/commons-io/1.3.2/commons-io-1.3.2.jar",
         "pkg:maven/org.apache.commons/[email protected]?type=pom": "https://repo.maven.apache.org/maven2/org/apache/commons/commons-io/1.3.2/commons-io-1.3.2.pom",
+        "pkg:maven/org.apache.commons/[email protected]?classifier=arbitrary": "https://repo.maven.apache.org/maven2/org/apache/commons/commons-io/1.3.2/commons-io-1.3.2-arbitrary.jar",
         # From `download_url` qualifier
         "pkg:github/yarnpkg/[email protected]?download_url=https://github.com/yarnpkg/yarn/releases/download/v1.3.2/yarn-v1.3.2.tar.gz&version_prefix=v": "https://github.com/yarnpkg/yarn/releases/download/v1.3.2/yarn-v1.3.2.tar.gz",
         "pkg:generic/lxc-master.tar.gz?download_url=https://salsa.debian.org/lxc-team/lxc/-/archive/master/lxc-master.tar.gz": "https://salsa.debian.org/lxc-team/lxc/-/archive/master/lxc-master.tar.gz",