Supabase Edge Functions Bug: deno.jsonc Compatibility Issue

This repository demonstrates a bug in Supabase's Edge Functions where the deno.jsonc file is not fully supported, despite being explicitly recommended for use (see Using deno.jsonc (recommended)). The issue arises when the deno.jsonc file includes JSONC-specific features like comments (line or block) or trailing commas, which cause the edge functions to fail.

Bug report: supabase/cli#3050

Issue Summary

Expected behavior: Supabase should support the deno.jsonc file format as advertised, including all JSONC features (comments and trailing commas).

Actual behavior: Edge functions only support deno.jsonc files that are valid JSON (without comments or trailing commas). Edge functions using JSONC-specific features fail with the following error message:

InvalidWorkerCreation: worker boot error: Unable to parse import map JSON: key must be a string at line 3 column 5
    at async UserWorker.create (ext:sb_user_workers/user_workers.js:139:15)
    at async Object.handler (file:///root/index.ts:156:22)
    at async respond (ext:sb_core_main_js/js/http.js:197:14) {
  name: "InvalidWorkerCreation"
}

And edge function response:

{"code":"BOOT_ERROR","message":"Worker failed to boot (please check logs)"}

Demonstration

This repository includes six edge functions to showcase the behavior:

• Working functions:
  • import-map: Uses a valid import_map.json file.
  • deno-json: Uses a valid deno.json file.
  • deno-jsonc-with-json: Uses a deno.jsonc file with valid JSON (without comments or trailing commas).
• Failing functions:
  • deno-jsonc-with-line-comment: Uses a deno.jsonc file with line comments.
  • deno-jsonc-with-block-comment: Uses a deno.jsonc file with block comments.
  • deno-jsonc-with-trailing-comma: Uses a deno.jsonc file with trailing commas.

How to Reproduce

1. Clone this repository.
2. Start Supabase (cd supabase, supabase start, and optionally supabase functions serve).
3. Invoke the edge functions (for example with the test-edge-functions.sh script or using curl) observe the results.

License

This repository is open-source and available under the MIT License.