fix: support packed option in proto3

packages/protons/package.json

@@ -137,7 +137,7 @@
   },
   "dependencies": {
     "meow": "^14.1.0",
-    "protobufjs-cli": "^2.6.1",
+    "protobufjs-cli": "^2.7.0",
     "protons-runtime": "^8.0.0"
   },
   "devDependencies": {

packages/protons/src/fields/array-field.ts

@@ -73,15 +73,20 @@ export class ArrayField extends Field {
     if (parent.def.edition === 'proto2') {
       this.packed = false
 
-      // check user overrides for field encoding
+      // check only old-school user overrides for field encoding
       if (usePackedEncoding(def.options, parent.def.options)) {
         this.packed = true
       }
     } else {
-      // the default from protobuf3 onwards
+      // the default from editions onwards
       this.packed = supportsPacked
 
-      // check user overrides for field encoding
+      // support older `packed` option in proto3 only
+      if (parent.def.edition === 'proto3' && def.options?.packed === false) {
+        this.packed = false
+      }
+
+      // check only new-school user overrides for field encoding
       if (useExpandedEncoding(def.options, parent.def.options)) {
         this.packed = false
       }

packages/protons/src/fields/field.ts

@@ -145,7 +145,7 @@ export class Field implements MessageField {
           console.info(`[WARN] ${message}`)
         }
       }
-    } else {
+    } else if (parent.def.edition != null && parent.def.edition !== 'proto3') {
       if (def.options?.packed != null) {
         const message = `field "${name}" has the packed=${def.options.packed} option, this is unsupported in edition="${parent.def.edition}". Please use features.repeated_field_encoding=${def.options?.packed === true ? 'PACKED' : 'EXPANDED'} instead - see https://protobuf.dev/editions/features/#repeated_field_encoding`
 

packages/protons/src/types/enum.ts

@@ -4,6 +4,7 @@ import type { Parent, Type, TypeCodec } from './index.ts'
 import type { Field } from '../fields/field.ts'
 
 export interface EnumDef {
+  edition: string
   values: Record<string, number>
 }
 

packages/protons/src/types/message.ts

@@ -70,7 +70,7 @@ export class Message implements Type {
       const mapEntryType = `${this.pbType}$${fieldName}Entry`
 
       def.nested[mapEntryType] = {
-        edition: def.edition,
+        edition: def.edition || 'proto3',
         fields: {
           key: {
             type: fieldDef.keyType,

packages/protons/src/types/module.ts

@@ -106,6 +106,7 @@ export class Module {
 
     for (const [name, def] of Object.entries(defs)) {
       let type: Message | Enum
+      def.edition ??= 'proto3'
 
       if (isEnumDef(def)) {
         type = new Enum(name, {