Allow overriding the base path for a URL with custom endpoints

api/resource.rb

@@ -305,57 +305,65 @@ def exclude_if_not_in_version!(version)
     # In newer resources there is much less standardisation in terms of value.
     # Generally for them though, it's the product.base_url + resource.name
     def self_link_url
-      base_url = @__product.base_url
+      [@__product.base_url, self_link_uri].flatten.join
+    end
+
+    # Returns the partial uri / relative path of a resource. In newer resources,
+    # this is the name. This fn is named self_link_uri for consistency, but
+    # could otherwise be considered to be "path"
+    def self_link_uri
       if @self_link.nil?
-        [base_url, [@base_url, '{{name}}'].join('/')].flatten.join
+        [@base_url, '{{name}}'].join('/')
       else
-        self_link = @self_link
-        [base_url, self_link].flatten.join
+        @self_link
       end
     end
 
     def collection_url
-      [
-        @__product.base_url,
-        @base_url
-      ].flatten.join
+      [@__product.base_url, collection_uri].flatten.join
+    end
+
+    def collection_uri
+      @base_url
     end
 
     def async_operation_url
+      [@__product.base_url, async_operation_uri].flatten.join
+    end
+
+    def async_operation_uri
       raise 'Not an async resource' if async.nil?
 
-      [@__product.base_url, async.operation.base_url].flatten.join
+      async.operation.base_url
     end
 
-    def default_create_url
-      if @create_verb.nil? || @create_verb == :POST
-        collection_url
-      elsif @create_verb == :PUT
-        self_link_url
-      else
-        raise "unsupported create verb #{@create_verb}"
-      end
+    def full_create_url
+      [@__product.base_url, create_uri].flatten.join
     end
 
-    def full_create_url
+    def create_uri
       if @create_url.nil?
-        default_create_url
+        if @create_verb.nil? || @create_verb == :POST
+          collection_uri
+        elsif @create_verb == :PUT
+          self_link_uri
+        else
+          raise "unsupported create verb #{@create_verb}"
+        end
       else
-        [
-          @__product.base_url,
-          @create_url
-        ].flatten.join
+        @create_url
       end
     end
 
     def full_delete_url
+      [@__product.base_url, delete_uri].flatten.join
+    end
+
+    def delete_uri
       if @delete_url.nil?
-        self_link_url
+        self_link_uri
       else
-        [
-          @__product.base_url,
-          @delete_url
-        ].flatten.join
+        @delete_url
       end
     end
 

provider/core.rb

@@ -389,9 +389,13 @@ def custom_update_properties_by_url(properties, update_url)
     end
 
     def update_url(resource, url_part)
-      return resource.self_link_url if url_part.nil?
+      [resource.__product.base_url, update_uri(resource, url_part)].flatten.join
+    end
+
+    def update_uri(resource, url_part)
+      return resource.self_link_uri if url_part.nil?
 
-      [resource.__product.base_url, url_part].flatten.join
+      url_part
     end
 
     # TODO(nelsonjr): Review all object interfaces and move to private methods

templates/terraform/custom_expand/self_link_from_name.erb

@@ -25,7 +25,7 @@ func expand<%= prefix -%><%= titlelize_property(property) -%>(v interface{}, d T
     return "https://www.googleapis.com/compute/v1/" + v.(string), nil
   } else if strings.HasPrefix(v.(string), "regions/") || strings.HasPrefix(v.(string), "zones/") {
     // For regional or zonal resources which include their region or zone, just put the project in front.
-    url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/")
+    url, err := replaceVars(d, config, "{{ComputeBasePath}}projects/{{project}}/")
     if err != nil {
       return nil, err
     }
@@ -34,7 +34,7 @@ func expand<%= prefix -%><%= titlelize_property(property) -%>(v interface{}, d T
   // Anything else is assumed to be a regional resource, with a partial link that begins with the resource name.
   // This isn't very likely - it's a last-ditch effort to extract something useful here.  We can do a better job
   // as soon as MultiResourceRefs are working since we'll know the types that this field is supposed to point to.
-  url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/regions/{{region}}/")
+  url, err := replaceVars(d, config, "{{ComputeBasePath}}projects/{{project}}/regions/{{region}}/")
   if err != nil {
     return nil, err
   }

templates/terraform/examples/base_configs/test_file.go.erb

@@ -114,7 +114,7 @@ func testAccCheck<%= resource_name -%>Destroy(s *terraform.State) error {
 
 	config := testAccProvider.Meta().(*Config)
 
-	url, err := replaceVarsForTest(rs, "<%= object.self_link_url -%>")
+	url, err := replaceVarsForTest(rs, "<%= "{{#{object.__product.name}BasePath}}#{object.self_link_uri}" -%>")
 	if err != nil {
 		return err
 	}

templates/terraform/post_create/labels.erb

@@ -16,7 +16,7 @@ if v, ok := d.GetOkExists("labels"); !isEmptyValue(reflect.ValueOf(v)) && (ok ||
     labelFingerprintProp := d.Get("label_fingerprint")
     obj["labelFingerprint"] = labelFingerprintProp
 
-    url, err = replaceVars(d, config, "<%= object.self_link_url -%>/setLabels")
+    url, err = replaceVars(d, config, "<%= "{{#{object.__product.name}BasePath}}#{object.self_link_uri}" -%>/setLabels")
     if err != nil {
         return err
     }

templates/terraform/pre_delete/detach_network.erb

@@ -3,7 +3,7 @@ if d.Get("networks.#").(int) > 0 {
 	patched := make(map[string]interface{})
 	patched["networks"] = nil
 
-	url, err := replaceVars(d, config, "https://www.googleapis.com/dns/v1beta2/projects/{{project}}/policies/{{name}}")
+	url, err := replaceVars(d, config, "{{DnsBasePath}}projects/{{project}}/policies/{{name}}")
 	if err != nil {
 		return err
 	}

templates/terraform/pre_delete/modify_delete_url.erb

@@ -2,7 +2,7 @@
 // in theory, we should find a way to disable the default URL and not construct
 // both, but that's a problem for another day. Today, we cheat.
 log.Printf("[DEBUG] replacing URL %q with a custom delete URL", url)
-url, err = replaceVars(d, config, "<%= object.__product.base_url -%><%=object.base_url-%>/{{name}}")
+url, err = replaceVars(d, config, "<%= "{{#{object.__product.name}BasePath}}" -%><%=object.base_url-%>/{{name}}")
 if err != nil {
 	return err
 }

templates/terraform/provider_gen.erb

@@ -18,6 +18,19 @@ package google
 
 import "github.com/hashicorp/terraform/helper/schema"
 
+// If the base path has changed as a result of your PR, make sure to update
+// the provider_reference page!
+var <%= product_ns -%>DefaultBasePath = "<%= product.base_url -%>"
+var <%= product_ns -%>CustomEndpointEntryKey = "<%= product_ns.underscore -%>_custom_endpoint"
+var <%= product_ns -%>CustomEndpointEntry = &schema.Schema{
+	Type:         schema.TypeString,
+	Optional:     true,
+	ValidateFunc: validateCustomEndpoint,
+	DefaultFunc: schema.MultiEnvDefaultFunc([]string{
+		"GOOGLE_<%= product_ns.underscore.upcase -%>_CUSTOM_ENDPOINT",
+	}, <%= product_ns -%>DefaultBasePath),
+}
+
 var Generated<%= product_ns -%>ResourcesMap = map[string]*schema.Resource{
 <% product.objects.reject { |r| r.exclude || r.not_in_version?(product.version_obj_or_default(version)) }.each do |object| -%>
 <%

templates/terraform/resource.erb

@@ -141,7 +141,7 @@ func resource<%= resource_name -%>Create(d *schema.ResourceData, meta interface{
     defer mutexKV.Unlock(lockName)
 <%  end -%>
 
-    url, err := replaceVars(d, config, "<%= object.full_create_url -%>")
+    url, err := replaceVars(d, config, "<%= "{{#{object.__product.name}BasePath}}#{object.create_uri}" -%>")
     if err != nil {
         return err
     }
@@ -199,7 +199,7 @@ func resource<%= resource_name -%>Create(d *schema.ResourceData, meta interface{
 func resource<%= resource_name -%>Read(d *schema.ResourceData, meta interface{}) error {
     config := meta.(*Config)
 
-    url, err := replaceVars(d, config, "<%= object.self_link_url -%>")
+    url, err := replaceVars(d, config, "<%= "{{#{object.__product.name}BasePath}}#{object.self_link_uri}" -%>")
     if err != nil {
         return err
     }
@@ -327,7 +327,7 @@ if <%= props.map { |prop| "d.HasChange(\"#{prop.name.underscore}\")" }.join ' ||
         defer mutexKV.Unlock(lockName)
 <%      end -%>
 
-        url, err := replaceVars(d, config, "<%= update_url(object, key[:update_url]) -%>")
+        url, err := replaceVars(d, config, "<%= "{{#{object.__product.name}BasePath}}#{update_uri(object, key[:update_url])}" -%>")
         if err != nil {
             return err
         }
@@ -417,7 +417,7 @@ if <%= props.map { |prop| "d.HasChange(\"#{prop.name.underscore}\")" }.join ' ||
     defer mutexKV.Unlock(lockName)
 <%  end -%>
 
-    url, err := replaceVars(d, config, "<%= update_url(object, object.update_url) -%>")
+    url, err := replaceVars(d, config, "<%= "{{#{object.__product.name}BasePath}}#{update_uri(object, object.update_url)}" -%>")
     if err != nil {
         return err
     }
@@ -485,7 +485,7 @@ func resource<%= resource_name -%>Delete(d *schema.ResourceData, meta interface{
     defer mutexKV.Unlock(lockName)
 <%  end -%>
 
-    url, err := replaceVars(d, config, "<%= object.full_delete_url -%>")
+    url, err := replaceVars(d, config, "<%= "{{#{object.__product.name}BasePath}}#{object.delete_uri}" -%>")
     if err != nil {
         return err
     }

third_party/terraform/data_sources/data_source_google_composer_image_versions.go

@@ -56,7 +56,7 @@ func dataSourceGoogleComposerImageVersionsRead(d *schema.ResourceData, meta inte
 		return err
 	}
 
-	url, err := replaceVars(d, config, "https://composer.googleapis.com/v1/projects/{{project}}/locations/{{region}}/imageVersions")
+	url, err := replaceVars(d, config, "{{ComposerBasePath}}projects/{{project}}/locations/{{region}}/imageVersions")
 	if err != nil {
 		return err
 	}

third_party/terraform/data_sources/data_source_tpu_tensorflow_versions.go

@@ -45,7 +45,7 @@ func dataSourceTpuTensorFlowVersionsRead(d *schema.ResourceData, meta interface{
 		return err
 	}
 
-	url, err := replaceVars(d, config, "https://tpu.googleapis.com/v1/projects/{{project}}/locations/{{zone}}/tensorflowVersions")
+	url, err := replaceVars(d, config, "{{TpuBasePath}}projects/{{project}}/locations/{{zone}}/tensorflowVersions")
 	if err != nil {
 		return err
 	}

third_party/terraform/tests/resource_access_context_manager_access_level_test.go.erb

@@ -68,7 +68,7 @@ func testAccCheckAccessContextManagerAccessLevelDestroy(s *terraform.State) erro
 
 		config := testAccProvider.Meta().(*Config)
 
-		url, err := replaceVarsForTest(rs, "https://accesscontextmanager.googleapis.com/v1beta/{{name}}")
+		url, err := replaceVarsForTest(rs, "{{AccessContextManagerBasePath}}{{name}}")
 		if err != nil {
 			return err
 		}

third_party/terraform/tests/resource_access_context_manager_access_policy_test.go.erb

@@ -68,7 +68,7 @@ func testAccCheckAccessContextManagerAccessPolicyDestroy(s *terraform.State) err
 
 		config := testAccProvider.Meta().(*Config)
 
-		url, err := replaceVarsForTest(rs, "https://accesscontextmanager.googleapis.com/v1beta/accessPolicies/{{name}}")
+		url, err := replaceVarsForTest(rs, "{{AccessContextManagerBasePath}}accessPolicies/{{name}}")
 		if err != nil {
 			return err
 		}

third_party/terraform/tests/resource_access_context_manager_service_perimeter_test.go.erb

@@ -67,7 +67,7 @@ func testAccCheckAccessContextManagerServicePerimeterDestroy(s *terraform.State)
 
 		config := testAccProvider.Meta().(*Config)
 
-		url, err := replaceVarsForTest(rs, "https://accesscontextmanager.googleapis.com/v1beta/{{name}}")
+		url, err := replaceVarsForTest(rs, "{{AccessContextManagerBasePath}}{{name}}")
 		if err != nil {
 			return err
 		}

third_party/terraform/tests/resource_compute_backend_bucket_signed_url_key_test.go

@@ -86,7 +86,7 @@ func checkComputeBackendBucketSignedUrlKeyExists(s *terraform.State) (bool, erro
 		config := testAccProvider.Meta().(*Config)
 		keyName := rs.Primary.ID
 
-		url, err := replaceVarsForTest(rs, "https://www.googleapis.com/compute/v1/projects/{{project}}/global/backendBuckets/{{backend_bucket}}")
+		url, err := replaceVarsForTest(rs, "{{ComputeBasePath}}projects/{{project}}/global/backendBuckets/{{backend_bucket}}")
 		if err != nil {
 			return false, err
 		}

third_party/terraform/tests/resource_compute_backend_service_signed_url_key_test.go

@@ -86,7 +86,7 @@ func checkComputeBackendServiceSignedUrlKeyExists(s *terraform.State) (bool, err
 		config := testAccProvider.Meta().(*Config)
 		keyName := rs.Primary.ID
 
-		url, err := replaceVarsForTest(rs, "https://www.googleapis.com/compute/v1/projects/{{project}}/global/backendServices/{{backend_service}}")
+		url, err := replaceVarsForTest(rs, "{{ComputeBasePath}}projects/{{project}}/global/backendServices/{{backend_service}}")
 		if err != nil {
 			return false, err
 		}

third_party/terraform/tests/resource_compute_instance_migrate_test.go

@@ -901,6 +901,9 @@ func getInitializedConfig(t *testing.T) *Config {
 		Region:      getTestRegionFromEnv(),
 		Zone:        getTestZoneFromEnv(),
 	}
+
+	ConfigureBasePaths(config)
+
 	err := config.LoadAndValidate()
 	if err != nil {
 		t.Fatal(err)

third_party/terraform/utils/bootstrap_utils_test.go

@@ -51,13 +51,15 @@ func BootstrapKMSKeyInLocation(t *testing.T, locationID string) bootstrappedKMS
 	keyParent := fmt.Sprintf("projects/%s/locations/%s/keyRings/%s", projectID, locationID, SharedKeyRing)
 	keyName := fmt.Sprintf("%s/cryptoKeys/%s", keyParent, SharedCyptoKey)
 
-	config := Config{
+	config := &Config{
 		Credentials: getTestCredsFromEnv(),
 		Project:     getTestProjectFromEnv(),
 		Region:      getTestRegionFromEnv(),
 		Zone:        getTestZoneFromEnv(),
 	}
 
+	ConfigureBasePaths(config)
+
 	if err := config.LoadAndValidate(); err != nil {
 		t.Errorf("Unable to bootstrap KMS key: %s", err)
 	}
@@ -116,7 +118,7 @@ var serviceAccountDisplay = "Bootstrapped Service Account for Terraform tests"
 // Some tests need a second service account, other than the test runner, to assert functionality on.
 // This provides a well-known service account that can be used when dynamically creating a service
 // account isn't an option.
-func getOrCreateServiceAccount(config Config, project string) (*iam.ServiceAccount, error) {
+func getOrCreateServiceAccount(config *Config, project string) (*iam.ServiceAccount, error) {
 	name := fmt.Sprintf("projects/%s/serviceAccounts/%s@%s.iam.gserviceaccount.com", project, serviceAccountEmail, project)
 	log.Printf("[DEBUG] Verifying %s as bootstrapped service account.\n", name)
 
@@ -148,7 +150,7 @@ func getOrCreateServiceAccount(config Config, project string) (*iam.ServiceAccou
 // on a different service account. Granting permissions takes time and there is no operation to wait on
 // so instead this creates a single service account once per test-suite with the correct permissions.
 // The first time this test is run it will fail, but subsequent runs will succeed.
-func impersonationServiceAccountPermissions(config Config, sa *iam.ServiceAccount, testRunner string) error {
+func impersonationServiceAccountPermissions(config *Config, sa *iam.ServiceAccount, testRunner string) error {
 	log.Printf("[DEBUG] Setting service account permissions.\n")
 	policy := iam.Policy{
 		Bindings: []*iam.Binding{},
@@ -179,13 +181,15 @@ func BootstrapServiceAccount(t *testing.T, project, testRunner string) string {
 		return ""
 	}
 
-	config := Config{
+	config := &Config{
 		Credentials: getTestCredsFromEnv(),
 		Project:     getTestProjectFromEnv(),
 		Region:      getTestRegionFromEnv(),
 		Zone:        getTestZoneFromEnv(),
 	}
 
+	ConfigureBasePaths(config)
+
 	if err := config.LoadAndValidate(); err != nil {
 		t.Fatalf("Bootstrapping failed. Unable to load test config: %s", err)
 	}