fix cli decoding/encoding

src/cli/index.ts

@@ -12,10 +12,9 @@ import colors from "tinyrainbow"
 
 import { decodeGmd } from "../decode.ts"
 import { encodeGmd } from "../encode.ts"
-import type { GMD } from "../types.ts"
 
 import { checkIfDir, findCommonPathStart, getOutputPath } from "./path-utils.ts"
-import { logError } from "./utils.ts"
+import { fromJson, logError, toJson } from "./utils.ts"
 
 type Options = {
   help?: boolean
@@ -105,8 +104,8 @@ for (const inputFilePath of uniqueInputFiles) {
   const data = fs.readFileSync(inputFilePath)
   const output =
     command === "decode"
-      ? JSON.stringify(decodeGmd(data), null, 2)
-      : encodeGmd(JSON.parse(data.toString("utf8")) as GMD)
+      ? toJson(decodeGmd(data))
+      : encodeGmd(fromJson(data.toString("utf8")))
 
   const outputPath = getOutputPath(inputFilePath, commonDirIndex, args.out)
 

src/cli/utils.ts

@@ -1,5 +1,9 @@
+import { Buffer } from "node:buffer"
+
 import colors from "tinyrainbow"
 
+import type { GMD } from "../types.js"
+
 const indent = (str: string, spaces: number): string => {
   const lines = str.split("\n")
   if (lines.length <= 1) return str
@@ -21,3 +25,27 @@ export const logError = <Exit extends boolean>(
 
   return undefined as never
 }
+
+export const toJson = (input: GMD): string => {
+  const data = {
+    filename: input.filename,
+    version: input.version,
+    language: input.language,
+    unknownData: input.unknownData.toString("base64url"),
+    entries: input.entries,
+  } satisfies Omit<GMD, "unknownData"> & { unknownData: string }
+
+  return JSON.stringify(data, null, 2)
+}
+
+export const fromJson = (input: string): GMD => {
+  const data = JSON.parse(input) as Omit<GMD, "unknownData"> & { unknownData: string }
+
+  return {
+    filename: data.filename,
+    version: data.version,
+    language: data.language,
+    unknownData: Buffer.from(data.unknownData, "base64url"),
+    entries: data.entries,
+  }
+}