chore(snippet-manager): migrate from joi to zod MONGOSH-2010 (#2360)

This aligns us with the validators we've standardized on in Compass,
improves TypeScript integration, and reduces executable size by 564 kB
and startup time by 1.5% (locally on an M3).

Author: addaleax

package-lock.json

@@ -42,7 +42,7 @@
     "bson": "^6.10.1",
     "cross-spawn": "^7.0.5",
     "escape-string-regexp": "^4.0.0",
-    "joi": "^17.4.0",
+    "zod": "^3.24.1",
     "tar": "^6.1.15"
   },
   "devDependencies": {

packages/snippet-manager/package.json

@@ -440,9 +440,10 @@ describe('SnippetManager', function () {
       await snippetManager.runSnippetCommand(['refresh']);
       expect.fail('missed exception');
     } catch (err: any) {
-      expect(err.message).to.equal(
-        `The specified index file ${indexURL} is not a valid index file: "indexFileVersion" must be less than or equal to 1`
+      expect(err.message).to.include(
+        `The specified index file ${indexURL} is not a valid index file:`
       );
+      expect(err.message).to.include(`Number must be less than or equal to 1`);
     }
   });
 

packages/snippet-manager/src/snippet-manager.spec.ts

@@ -16,7 +16,7 @@ import { once } from 'events';
 import tar from 'tar';
 import zlib from 'zlib';
 import bson from 'bson';
-import joi from 'joi';
+import { z } from 'zod';
 import type {
   AgentWithInitialize,
   DevtoolsProxyOptions,
@@ -34,63 +34,46 @@ export interface SnippetOptions {
   proxyOptions?: DevtoolsProxyOptions | AgentWithInitialize;
 }
 
-export interface ErrorMatcher {
-  matches: RegExp[];
-  message: string;
-}
-
-export interface SnippetDescription {
-  name: string;
-  snippetName: string;
-  installSpec?: string;
-  version: string;
-  description: string;
-  license: string;
-  readme: string;
-  errorMatchers?: ErrorMatcher[];
-}
-
-export interface SnippetIndexFile {
-  indexFileVersion: 1;
-  index: SnippetDescription[];
-  metadata: { homepage: string };
-  sourceURL: string;
-}
-
 interface NpmMetaDataResponse {
   dist?: {
     tarball?: string;
   };
 }
 
-const indexFileSchema = joi.object({
-  indexFileVersion: joi.number().integer().max(1).required(),
-
-  metadata: joi.object({
-    homepage: joi.string(),
-  }),
-
-  index: joi
-    .array()
-    .required()
-    .items(
-      joi.object({
-        name: joi.string().required(),
-        snippetName: joi.string().required(),
-        installSpec: joi.string(),
-        version: joi.string().required(),
-        description: joi.string().required().allow(''),
-        license: joi.string().required(),
-        readme: joi.string().required().allow(''),
-        errorMatchers: joi.array().items(
-          joi.object({
-            message: joi.string().required(),
-            matches: joi.array().required().items(joi.object().regex()),
-          })
-        ),
-      })
-    ),
+const regExpTag = Object.prototype.toString.call(/foo/);
+const errorMatcherSchema = z.object({
+  message: z.string(),
+  matches: z.array(
+    z.custom<RegExp>((val) => Object.prototype.toString.call(val) === regExpTag)
+  ),
+});
+const indexDescriptionSchema = z.object({
+  name: z.string(),
+  snippetName: z.string(),
+  installSpec: z.string().optional(),
+  version: z.string(),
+  description: z.string(),
+  license: z.string(),
+  readme: z.string(),
+  errorMatchers: z.array(errorMatcherSchema).optional(),
 });
+const indexFileSchema = z.object({
+  indexFileVersion: z.number().int().max(1),
+
+  metadata: z
+    .object({
+      homepage: z.string(),
+    })
+    .passthrough(),
+
+  index: z.array(indexDescriptionSchema),
+});
+
+export type ErrorMatcher = z.infer<typeof errorMatcherSchema>;
+export type SnippetIndexFile = z.infer<typeof indexFileSchema> & {
+  sourceURL: string;
+};
+export type SnippetDescription = z.infer<typeof indexDescriptionSchema>;
 
 async function unpackBSON<T = any>(data: Buffer): Promise<T> {
   return bson.deserialize(await brotliDecompress(data)) as T;
@@ -361,9 +344,8 @@ export class SnippetManager implements ShellPlugin {
                   `The specified index file ${url} could not be parsed: ${err.message}`
                 );
               }
-              const { error } = indexFileSchema.validate(data, {
-                allowUnknown: true,
-              });
+              const { error, data: parsedData } =
+                indexFileSchema.safeParse(data);
               if (error) {
                 this.messageBus.emit('mongosh-snippets:fetch-index-error', {
                   action: 'validate-fetched',
@@ -374,7 +356,7 @@ export class SnippetManager implements ShellPlugin {
                   `The specified index file ${url} is not a valid index file: ${error.message}`
                 );
               }
-              return { ...data, sourceURL: url };
+              return { ...parsedData, sourceURL: url };
             })
           );
           // If possible, write the result to disk for caching.