utils/pypi: return nil for non-pypi-packages from url

Library/Homebrew/test/utils/pypi_spec.rb

@@ -172,5 +172,13 @@ describe PyPI do
     it "updates url to new version" do
       expect(described_class.update_pypi_url(old_package_url, "5.29.0")).to eq package_url
     end
+
+    it "returns nil for invalid versions" do
+      expect(described_class.update_pypi_url(old_package_url, "0.0.0")).to eq nil
+    end
+
+    it "returns nil for non-pypi urls" do
+      expect(described_class.update_pypi_url("https://brew.sh/foo-1.0.tgz", "1.1")).to eq nil
+    end
   end
 end

Library/Homebrew/utils/pypi.rb

@@ -110,8 +110,12 @@ module PyPI
   def update_pypi_url(url, version)
     package = Package.new url, is_url: true
 
+    return unless package.valid_pypi_package?
+
     _, url = package.pypi_info(version: version)
     url
+  rescue ArgumentError
+    nil
   end
 
   # Return true if resources were checked (even if no change).