[native_assets_cli] Use JSON enums where applicable

Author: dcharkes

pkgs/code_assets/doc/schema/shared/shared_definitions.schema.json

@@ -17,22 +17,14 @@
       "type": "string",
       "anyOf": [
         {
-          "const": "arm"
-        },
-        {
-          "const": "arm64"
-        },
-        {
-          "const": "ia32"
-        },
-        {
-          "const": "riscv32"
-        },
-        {
-          "const": "riscv64"
-        },
-        {
-          "const": "x64"
+          "enum": [
+            "arm",
+            "arm64",
+            "ia32",
+            "riscv32",
+            "riscv64",
+            "x64"
+          ]
         },
         {
           "type": "string"
@@ -288,19 +280,13 @@
           "type": "string",
           "anyOf": [
             {
-              "const": "dynamic_loading_bundle"
-            },
-            {
-              "const": "dynamic_loading_executable"
-            },
-            {
-              "const": "dynamic_loading_process"
-            },
-            {
-              "const": "dynamic_loading_system"
-            },
-            {
-              "const": "static"
+              "enum": [
+                "dynamic_loading_bundle",
+                "dynamic_loading_executable",
+                "dynamic_loading_process",
+                "dynamic_loading_system",
+                "static"
+              ]
             },
             {
               "type": "string"
@@ -333,22 +319,14 @@
       "type": "string",
       "anyOf": [
         {
-          "const": "dynamic"
-        },
-        {
-          "const": "prefer_dynamic"
-        },
-        {
-          "const": "prefer_static"
-        },
-        {
-          "const": "prefer-dynamic"
-        },
-        {
-          "const": "prefer-static"
-        },
-        {
-          "const": "static"
+          "enum": [
+            "dynamic",
+            "prefer_dynamic",
+            "prefer-dynamic",
+            "prefer_static",
+            "prefer-static",
+            "static"
+          ]
         },
         {
           "type": "string"
@@ -370,19 +348,13 @@
       "type": "string",
       "anyOf": [
         {
-          "const": "android"
-        },
-        {
-          "const": "ios"
-        },
-        {
-          "const": "linux"
-        },
-        {
-          "const": "macos"
-        },
-        {
-          "const": "windows"
+          "enum": [
+            "android",
+            "ios",
+            "linux",
+            "macos",
+            "windows"
+          ]
         },
         {
           "type": "string"

pkgs/json_syntax_generator/lib/src/parser/schema_analyzer.dart

@@ -86,9 +86,7 @@ class SchemaAnalyzer {
     typeName ??= _ucFirst(_snakeToCamelCase(name!));
     if (_classes[typeName] != null) return; // Already analyzed.
 
-    final anyOf = schemas.anyOfs.single;
-    final values =
-        anyOf.map((e) => e.constValue).whereType<String>().toList()..sort();
+    final values = schemas.enumOrTaggedUnionValues;
     _classes[typeName] = EnumClassInfo(
       name: typeName,
       enumValues: [
@@ -243,9 +241,7 @@ class SchemaAnalyzer {
 
     final propertyKey = schemas.propertyKeys.single;
     final typeProperty = schemas.property(propertyKey);
-    final anyOf = typeProperty.anyOfs.single;
-    final subTypes =
-        anyOf.map((e) => e.constValue).whereType<String>().toList();
+    final subTypes = typeProperty.enumOrTaggedUnionValues;
     for (final subType in subTypes) {
       final ifThenSchemas = schemas.ifThenSchemas;
       final subTypeNameShort = _ucFirst(_snakeToCamelCase(subType));
@@ -591,6 +587,12 @@ extension type JsonSchemas._(List<JsonSchema> _schemas) {
     return result.singleOrNull;
   }
 
+  List<String> get enum_ => [
+    for (final schema in _schemas)
+      for (final value in schema.enumValues ?? [])
+        if (value is String) value,
+  ];
+
   List<Uri> get refs {
     final result = <Uri>[];
     for (final schema in _schemas) {
@@ -695,6 +697,14 @@ extension on JsonSchemas {
     }
     throw StateError('No super class schema found for $parentClassName.');
   }
+
+  List<String> get enumOrTaggedUnionValues => [
+    for (final schema in _schemas)
+      for (final s in schema.anyOf) ...[
+        if (s.constValue is String) s.constValue as String,
+        ...s.enumValues?.whereType<String>() ?? [],
+      ],
+  ]..sort();
 }
 
 extension on String {