Add previous module variations of aliases

provider/pkg/gen/schema.go

@@ -967,17 +967,36 @@ func (g *packageGenerator) generateAliases(resource *resourceVariant, typeNameAl
 		aliases = append(aliases, pschema.AliasSpec{Type: &alias})
 	}
 
+	// Add an alias for the same version of the resource, but in its old module.
+	if resource.PreviousProviderName != nil {
+		addAlias(*resource.PreviousProviderName, resource.typeName, g.sdkVersion)
+	}
+
 	for _, alias := range typeNameAliases {
 		addAlias(g.provider, alias, g.sdkVersion)
+		// Add an alias for the same alias, but in its old module.
+		if resource.PreviousProviderName != nil {
+			addAlias(*resource.PreviousProviderName, alias, g.sdkVersion)
+		}
 	}
 
 	// Add an alias for each API version that has the same path in it.
 	for _, version := range resource.CompatibleVersions {
 		addAlias(g.provider, resource.typeName, version)
 
+		// Add an alias for the other versions, but from its old module.
+		if resource.PreviousProviderName != nil {
+			addAlias(*resource.PreviousProviderName, resource.typeName, version)
+		}
+
 		// Add type name aliases for each compatible version.
 		for _, alias := range typeNameAliases {
 			addAlias(g.provider, alias, version)
+
+			// Add an alias for the other version, with alias, from its old module.
+			if resource.PreviousProviderName != nil {
+				addAlias(*resource.PreviousProviderName, alias, version)
+			}
 		}
 	}