Fix generation of attribute-based APIs (#376)

The code generation for attribute-based APIs (SNS, SQS, etc) had not been kept up to date for 2+ years, meaning that the SNS and SQS controllers could not be regenerated to bring in updated ACK runtimes or aws-sdk-go releases.

This commit gets the attribute-based API code generation back into shape. Most of the changes in here were around the code generator being able to find either ResourceConfig or FieldConfig objects using case-insensitive matching, which turned out to be the main cause for code generator failures when re-generating the SNS controller.

Signed-off-by: Jay Pipes <jaypipes@gmail.com>

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Author: jaypipes

pkg/config/resource.go

@@ -14,6 +14,8 @@
 package config
 
 import (
+	"strings"
+
 	awssdkmodel "github.com/aws/aws-sdk-go/private/model/api"
 
 	"github.com/aws-controllers-k8s/code-generator/pkg/util"
@@ -387,8 +389,8 @@ func (c *Config) ResourceContainsAttributesMap(resourceName string) bool {
 	if c == nil {
 		return false
 	}
-	resGenConfig, found := c.Resources[resourceName]
-	if found {
+	resGenConfig := c.GetResourceConfig(resourceName)
+	if resGenConfig != nil {
 		if resGenConfig.UnpackAttributesMapConfig != nil {
 			return true
 		}
@@ -450,13 +452,19 @@ func (c *Config) ResourceSetsSingleAttribute(resourceName string) bool {
 	return resGenConfig.UnpackAttributesMapConfig.SetAttributesSingleAttribute
 }
 
-// GetResourceConfig returns the ResourceConfig for a given resource name
+// GetResourceConfig returns the ResourceConfig for a given resource name,
+// searching case-insensitively.
 func (c *Config) GetResourceConfig(resourceName string) *ResourceConfig {
 	if c == nil {
 		return nil
 	}
-	rc, _ := c.Resources[resourceName]
-	return &rc
+
+	for resName, resCfg := range c.Resources {
+		if strings.EqualFold(resName, resourceName) {
+			return &resCfg
+		}
+	}
+	return nil
 }
 
 // GetCompareIgnoredFieldPaths returns the list of field paths to ignore when
@@ -658,3 +666,18 @@ func (c *Config) TagsAreIgnored(resName string) bool {
 	}
 	return false
 }
+
+// GetFieldConfig accepts a string name of a field and returns the FieldConfig
+// object inside the ResourceConfig matching (case-insensitively) the supplied
+// field name, or nil if that field has no FieldConfig.
+func (rc *ResourceConfig) GetFieldConfig(subject string) *FieldConfig {
+	if rc == nil {
+		return nil
+	}
+	for fieldName, fieldCfg := range rc.Fields {
+		if strings.EqualFold(fieldName, subject) {
+			return fieldCfg
+		}
+	}
+	return nil
+}

pkg/generate/code/compare.go

@@ -94,7 +94,7 @@ func CompareResource(
 ) string {
 	out := "\n"
 
-	fieldConfigs := cfg.GetFieldConfigs(r.Names.Original)
+	resConfig := cfg.GetResourceConfig(r.Names.Camel)
 
 	// We need a deterministic order to traverse our top-level fields...
 	specFieldNames := []string{}
@@ -111,18 +111,21 @@ func CompareResource(
 		secondResAdaptedVarName := secondResVarName + cfg.PrefixConfig.SpecField
 		secondResAdaptedVarName += "." + specField.Names.Camel
 
+		var fieldConfig *ackgenconfig.FieldConfig
 		var compareConfig *ackgenconfig.CompareFieldConfig
 
-		// TODO(amine,john): This is fragile. We actually need to have a way of
-		// normalizing names in a lossless fashion...
-		//
-		// We chose to normalize names as camel case.
-		fieldNameCamel := names.New(fieldName).Camel
-		fieldConfig := fieldConfigs[fieldNameCamel]
+		if resConfig != nil {
+			fieldConfig = resConfig.GetFieldConfig(fieldName)
+		}
 		if fieldConfig != nil {
 			compareConfig = fieldConfig.Compare
 		}
 
+		if fieldConfig != nil && fieldConfig.IsAttribute {
+			// NOTE(jaypipes): We compare the Attributes collection
+			// specially...
+			continue
+		}
 		if compareConfig != nil && compareConfig.IsIgnored {
 			continue
 		}

pkg/generate/code/set_sdk.go

@@ -406,8 +406,8 @@ func SetSDKGetAttributes(
 	indent := strings.Repeat("\t", indentLevel)
 
 	inputFieldOverrides := map[string][]string{}
-	rConfig, ok := cfg.Resources[r.Names.Original]
-	if !ok {
+	rConfig := cfg.GetResourceConfig(r.Names.Original)
+	if rConfig == nil {
 		// This is a bug in the code generation if this occurs...
 		msg := fmt.Sprintf(
 			"called SetSDKGetAttributes for a resource '%s' that doesn't have a ResourceConfig",
@@ -421,7 +421,6 @@ func SetSDKGetAttributes(
 			inputFieldOverrides[memberName] = override.Values
 		}
 	}
-
 	for _, memberName := range inputShape.MemberNames() {
 		if r.IsPrimaryARNField(memberName) {
 			// if ko.Status.ACKResourceMetadata != nil && ko.Status.ACKResourceMetadata.ARN != nil {

pkg/model/op.go

@@ -173,9 +173,9 @@ func OpTypeFromString(s string) OpType {
 		return OpTypeGet
 	case "list", "readmany", "read_many":
 		return OpTypeList
-	case "getattributes":
+	case "getattributes", "get_attributes":
 		return OpTypeGetAttributes
-	case "setattributes":
+	case "setattributes", "set_attributes":
 		return OpTypeSetAttributes
 	}