Upgrading from 1.12.9 to 1.12.14: compatibility issues in Nuxt/TypeScript & "config" package

[INRIX-Iurii-Okhmat]

I've got a Nuxt app that uses "config" (https://www.npmjs.com/package/config) module. Config files are ".ts". Config is imported in nuxt.config.ts to get environment-specific configuration.

Everything was working fine with v1.12.9, upgrading to v1.12.14 produces the following error.

 FATAL  Cannot parse config file: '/Users/‡‡‡‡‡‡‡‡‡‡‡‡‡‡/ui/config/default.ts': SyntaxError: Unexpected token 'export'

  at Config.util.parseFile (node_modules/config/lib/config.js:844:11)
  at node_modules/config/lib/config.js:644:26
  at Array.forEach (<anonymous>)
  at Config.util.loadFileConfigs (node_modules/config/lib/config.js:643:16)
  at new Config (node_modules/config/lib/config.js:116:27)
  at node_modules/config/lib/config.js:1492:31
  at jiti (node_modules/jiti/dist/jiti.js:1:196050)
  at nuxt.config.ts:3:38
  at jiti (node_modules/jiti/dist/jiti.js:1:196050)
  at Object.loadNuxtConfig (node_modules/@nuxt/config/dist/config.js:1082:15)

  ╭──────────────────────────────────────────────────────────╮
  │                                                                                
  │   ✖ Nuxt Fatal Error                                                           
  │                                                                                
  │   Error: Cannot parse config file:                                             
  │   '/Users/‡‡‡‡‡‡‡‡‡‡‡‡‡‡/ui/config/default.ts':   							   
  │   SyntaxError: Unexpected token 'export'                                       
  │                                                                                
 ╰──────────────────────────────────────────────────────────╯

You can find a sample project here: https://github.com/INRIX-Iurii-Okhmat/jiti-config-issue-repro
It has a package-lock with latest (1.12.14) version: https://github.com/INRIX-Iurii-Okhmat/jiti-config-issue-repro/blob/933dc181f81c4fa21f97eabc3479c69ac27445f7/package-lock.json#L6112

Downgrading to 1.12.9 fixes the issue

"jiti": {
            "version": "1.12.9",
            "resolved": "https://registry.npmjs.org/jiti/-/jiti-1.12.9.tgz",
            "integrity": "sha512-TdcJywkQtcwLxogc4rSMAi479G2eDPzfW0fLySks7TPhgZZ4s/tM6stnzayIh3gS/db3zExWJyUx4cNWrwAmoQ=="
}

NodeJS: v12.
Nuxt version: 2.15.7

[pi0]

Hi @INRIX-Iurii-Okhmat. Thanks for issue and reprotuction. I've added a hotfix as jiti@1.12.15 which you can get by recreating lockfile. However, please consider that config npm package does not support typescript (for files in config/ directory). ts support in config/ with jiti might be broken in the future versions.

---

Details:

Interestingly your setup was working before because jiti was wrongly transpiling config package itself and implicitly adding typescript support to its loader require call. When the new version fixed that and use native CJS, it got broken!

1.12.14:

[jiti] [transpile] /home/pooya/tmp/jiti-config-issue-repro/nuxt.config.ts                                                                                                                                                                                              12:55:07
[jiti] [cache hit] /home/pooya/tmp/jiti-config-issue-repro/nuxt.config.ts ~> /tmp/node-jiti/jiti-config-issue-repro-nuxt.config.ts.7ce25370.js                                                                                                                         12:55:07
[jiti] [native] /home/pooya/tmp/jiti-config-issue-repro/node_modules/config/lib/config.js                                                                                                                                                                              12:55:07
[jiti] Native require error: Cannot parse config file: '/home/pooya/tmp/jiti-config-issue-repro/config/default.ts': SyntaxError: Unexpected token 'export'                                                                                                             12:55:08

  at Config.util.parseFile (node_modules/config/lib/config.js:844:11)
  at node_modules/config/lib/config.js:644:26
  at Array.forEach (<anonymous>)
  at Config.util.loadFileConfigs (node_modules/config/lib/config.js:643:16)
  at new Config (node_modules/config/lib/config.js:116:27)
  at Object.<anonymous> (node_modules/config/lib/config.js:1492:31)
  at Module._compile (internal/modules/cjs/loader.js:1085:14)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
  at Module.load (internal/modules/cjs/loader.js:950:32)
  at Function.Module._load (internal/modules/cjs/loader.js:790:12)
[jiti] [fallback] /home/pooya/tmp/jiti-config-issue-repro/node_modules/config/lib/config.js                                                                                                                                                                            12:55:08
[jiti] [cache hit] /home/pooya/tmp/jiti-config-issue-repro/node_modules/config/lib/config.js ~> /tmp/node-jiti/lib-config.js.ff39efc7.js                                                                                                                               12:55:08

 FATAL  Cannot parse config file: '/home/pooya/tmp/jiti-config-issue-repro/config/default.ts': SyntaxError: Unexpected token 'export'                                                                                                              12:55:08

1.12.9:

[jiti] [transpile] /home/pooya/tmp/jiti-config-issue-repro/nuxt.config.ts                                                                                                                                                                                                    12:56:23
[jiti] [cache hit] /home/pooya/tmp/jiti-config-issue-repro/nuxt.config.ts ~> /tmp/node-jiti/jiti-config-issue-repro-nuxt.config.ts.7ce25370.js                                                                                                                               12:56:23
[jiti] [transpile] /home/pooya/tmp/jiti-config-issue-repro/node_modules/config/lib/config.js                                                                                                                                                                                 12:56:23
[jiti] [cache hit] /home/pooya/tmp/jiti-config-issue-repro/node_modules/config/lib/config.js ~> /tmp/node-jiti/lib-config.js.ff39efc7.js                                                                                                                                     12:56:23
[jiti] [native] /home/pooya/tmp/jiti-config-issue-repro/node_modules/config/defer.js                                                                                                                                                                                         12:56:23
[jiti] [native] /home/pooya/tmp/jiti-config-issue-repro/node_modules/config/raw.js                                                                                                                                                                                           12:56:23
[jiti] [transpile] /home/pooya/tmp/jiti-config-issue-repro/node_modules/config/parser.js                                                                                                                                                                                     12:56:23
[jiti] [cache miss] /home/pooya/tmp/jiti-config-issue-repro/node_modules/config/parser.js                                                                                                                                                                                    12:56:23
[jiti] [native] /home/pooya/tmp/jiti-config-issue-repro/node_modules/ts-node/dist/index.js                                                                                                                                                                                   12:56:23
[jiti] [transpile] /home/pooya/tmp/jiti-config-issue-repro/config/default.ts                                                                                                                                                                                                 12:56:23
[jiti] [cache miss] /home/pooya/tmp/jiti-config-issue-repro/config/default.ts                                                                                                                                                                                                12:56:23
[jiti] [transpile] /home/pooya/tmp/jiti-config-issue-repro/node_modules/@nuxt/typescript-build/dist/index.js                                                                                                                                                                 12:56:23
[jiti] [cache miss] /home/pooya/tmp/jiti-config-issue-repro/node_modules/@nuxt/typescript-build/dist/index.js                                                                                                                                                                12:56:23
[jiti] [native] /home/pooya/tmp/jiti-config-issue-repro/node_modules/@nuxt/loading-screen/lib/module.js                                                                                                                                                                      12:56:24
[jiti] [native] /home/pooya/tmp/jiti-config-issue-repro/node_modules/@nuxt/components/dist/index.js                                                                                                                                                                          12:56:24
[jiti] [native] /home/pooya/tmp/jiti-config-issue-repro/node_modules/@nuxt/telemetry/dist/index.js