Improve error message when the .env MODELS is not well formatted (#451)

* feat: Improve error handling and parsing of MODELS environment variable

* Add more verbose parsing error

* Lint

* improve message

* lint

* refactor error handling and default values in models

* improve

* format

---------

Co-authored-by: Nathan Sarrazin <sarrazin.nathan@gmail.com>

package-lock.json

@@ -36,6 +36,7 @@
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 				"@tailwindcss/typography": "^0.5.9",
 				"@types/jsdom": "^21.1.1",
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+			"dependencies": {
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+			"version": "5.9.0",
+			"resolved": "https://registry.npmjs.org/mongodb/-/mongodb-5.9.0.tgz",
+			"integrity": "sha512-g+GCMHN1CoRUA+wb1Agv0TI4YTSiWr42B5ulkiAfLLHitGK1R+PkSAf3Lr5rPZwi/3F04LiaZEW0Kxro9Fi2TA==",
 			"dependencies": {
-				"bson": "^5.4.0",
+				"bson": "^5.5.0",
 				"mongodb-connection-string-url": "^2.6.0",
 				"socks": "^2.7.1"
 			},
@@ -3849,6 +3542,52 @@
 			"resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.10.tgz",
 			"integrity": "sha512-5GFldHPXVG/YZmFzJvKK2zDSzPKhEp0+ZR5SVaoSag9fsL5YgHbUHDfnG5494ISANDcK4KwPXAx2xqVEydmd7w=="
 		},
+		"node_modules/nomnom": {
+			"version": "1.8.1",
+			"resolved": "https://registry.npmjs.org/nomnom/-/nomnom-1.8.1.tgz",
+			"integrity": "sha512-5s0JxqhDx9/rksG2BTMVN1enjWSvPidpoSgViZU4ZXULyTe+7jxcCRLB6f42Z0l1xYJpleCBtSyY6Lwg3uu5CQ==",
+			"deprecated": "Package no longer supported. Contact support@npmjs.com for more info.",
+			"dev": true,
+			"dependencies": {
+				"chalk": "~0.4.0",
+				"underscore": "~1.6.0"
+			}
+		},
+		"node_modules/nomnom/node_modules/ansi-styles": {
+			"version": "1.0.0",
+			"resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-1.0.0.tgz",
+			"integrity": "sha512-3iF4FIKdxaVYT3JqQuY3Wat/T2t7TRbbQ94Fu50ZUCbLy4TFbTzr90NOHQodQkNqmeEGCw8WbeP78WNi6SKYUA==",
+			"dev": true,
+			"engines": {
+				"node": ">=0.8.0"
+			}
+		},
+		"node_modules/nomnom/node_modules/chalk": {
+			"version": "0.4.0",
+			"resolved": "https://registry.npmjs.org/chalk/-/chalk-0.4.0.tgz",
+			"integrity": "sha512-sQfYDlfv2DGVtjdoQqxS0cEZDroyG8h6TamA6rvxwlrU5BaSLDx9xhatBYl2pxZ7gmpNaPFVwBtdGdu5rQ+tYQ==",
+			"dev": true,
+			"dependencies": {
+				"ansi-styles": "~1.0.0",
+				"has-color": "~0.1.0",
+				"strip-ansi": "~0.1.0"
+			},
+			"engines": {
+				"node": ">=0.8.0"
+			}
+		},
+		"node_modules/nomnom/node_modules/strip-ansi": {
+			"version": "0.1.1",
+			"resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-0.1.1.tgz",
+			"integrity": "sha512-behete+3uqxecWlDAm5lmskaSaISA+ThQ4oNNBDTBJt0x2ppR6IPqfZNuj6BLaLJ/Sji4TPZlcRyOis8wXQTLg==",
+			"dev": true,
+			"bin": {
+				"strip-ansi": "cli.js"
+			},
+			"engines": {
+				"node": ">=0.8.0"
+			}
+		},
 		"node_modules/normalize-path": {
 			"version": "3.0.0",
 			"resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
@@ -5749,6 +5488,12 @@
 				"node": ">=0.8.0"
 			}
 		},
+		"node_modules/underscore": {
+			"version": "1.6.0",
+			"resolved": "https://registry.npmjs.org/underscore/-/underscore-1.6.0.tgz",
+			"integrity": "sha512-z4o1fvKUojIWh9XuaVLUDdf86RQiq13AC1dmHbTpoyuu+bquHms76v16CjycCbec87J7z0k//SiQVk0sMdFmpQ==",
+			"dev": true
+		},
 		"node_modules/undici": {
 			"version": "5.22.0",
 			"resolved": "https://registry.npmjs.org/undici/-/undici-5.22.0.tgz",

package.json

@@ -20,6 +20,7 @@
 		"@sveltejs/kit": "^1.15.10",
 		"@tailwindcss/typography": "^0.5.9",
 		"@types/jsdom": "^21.1.1",
+		"@types/jsonlint": "^1.6.1",
 		"@types/marked": "^4.0.8",
 		"@types/parquetjs": "^0.10.3",
 		"@typescript-eslint/eslint-plugin": "^5.45.0",
@@ -27,6 +28,7 @@
 		"eslint": "^8.28.0",
 		"eslint-config-prettier": "^8.5.0",
 		"eslint-plugin-svelte": "^2.27.3",
+		"jsonlint": "^1.6.3",
 		"marked-katex-extension": "^3.0.6",
 		"prettier": "^2.8.0",
 		"prettier-plugin-svelte": "^2.8.1",

src/lib/server/models.ts

@@ -2,6 +2,8 @@ import { HF_ACCESS_TOKEN, MODELS, OLD_MODELS } from "$env/static/private";
 import type { ChatTemplateInput, WebSearchQueryTemplateInput } from "$lib/types/Template";
 import { compileTemplate } from "$lib/utils/template";
 import { z } from "zod";
+import { error } from "@sveltejs/kit";
+import { parse } from "jsonlint";
 
 type Optional<T, K extends keyof T> = Pick<Partial<T>, K> & Omit<T, K>;
 
@@ -37,6 +39,17 @@ const combinedEndpoint = endpoint.transform((data) => {
 	}
 });
 
+let parsedModels;
+try {
+	parsedModels = parse(MODELS);
+} catch (e) {
+	const { stack, message } = e as Error;
+	console.error(stack);
+	const safe_error_message = message.split("\n")[0].slice(0, -1);
+	throw error(500, {
+		message: "Failed to parse `MODELS` config:<br>" + safe_error_message,
+	});
+}
 const modelsRaw = z
 	.array(
 		z.object({
@@ -96,7 +109,7 @@ const modelsRaw = z
 				.optional(),
 		})
 	)
-	.parse(JSON.parse(MODELS));
+	.parse(parsedModels);
 
 export const models = await Promise.all(
 	modelsRaw.map(async (m) => ({