Write directory_urls in provider if write indices.

cmd/csaf_provider/create.go

@@ -298,6 +298,17 @@ func createProviderMetadata(c *config, wellknownCSAF string) error {
 	pm := csaf.NewProviderMetadataDomain(c.CanonicalURLPrefix, c.modelTLPs())
 	c.ProviderMetaData.apply(pm)
 
+	// We have directory based distributions.
+	if c.WriteIndices {
+		// Every TLP as a distribution?
+		for _, t := range c.TLPs {
+			if t != tlpCSAF {
+				pm.AddDirectoryDistribution(
+					c.CanonicalURLPrefix + "/.well-known/csaf/" + string(t))
+			}
+		}
+	}
+
 	key, err := loadCryptoKeyFromFile(c.OpenPGPPublicKey)
 	if err != nil {
 		return fmt.Errorf("cannot load public key: %v", err)

csaf/models.go

@@ -466,6 +466,18 @@ func (pmd *ProviderMetadata) Defaults() {
 	}
 }
 
+// AddDirectoryDistribution adds a directory based distribution
+// with a given url to the provider metadata.
+func (pmd *ProviderMetadata) AddDirectoryDistribution(url string) {
+	// Avoid duplicates.
+	for i := range pmd.Distributions {
+		if pmd.Distributions[i].DirectoryURL == url {
+			return
+		}
+	}
+	pmd.Distributions = append(pmd.Distributions, Distribution{DirectoryURL: url})
+}
+
 // Validate checks if the feed is valid.
 // Returns an error if the validation fails otherwise nil.
 func (f *Feed) Validate() error {