Deno 2 deprecation warnings during edge function deployment (dx: low priority)

[sbs44]

Describe the bug

When deploying edge functions, the CLI outputs Deno 2 deprecation warnings about --import-map and --decorator flags. While deployments succeed, these warnings clutter the output and indicate the CLI is using deprecated Deno command-line flags.

To Reproduce

1. Create any edge function with a deno.json containing imports

2. Configure import_map in supabase/config.toml:

   [functions.awesome-function]
   enabled = true
   verify_jwt = false
   import_map = "./functions/awesome-function/deno.json"
   entrypoint = "./functions/awesome-function/index.ts"

3. Deploy the function: supabase functions deploy awesome-function --no-verify-jwt

4. Observe deprecation warnings in output (see "Actual output", below)

Expected behavior

Edge functions should deploy without deprecation warnings (modern Deno 2 reads configuration from deno.json files automatically).

Actual output

Bundling Function: awesome-function
Specifying import_map through flags is no longer supported. Please use deno.json instead.
Specifying decorator through flags is no longer supported. Please use deno.json instead.
Deployed Functions on project abcdefghijklmnopq: awesome-function

System information

Rerun the failing command with --create-ticket flag.

• Ticket ID: (FYI: adding "--create-ticket" flag does not output ticket ID)
• Version of OS: macOS Tahoe 26.0.1
• Version of CLI: 2.50.2 (beta)
• Version of Docker: 28.4.0
• Versions of services:

   SERVICE IMAGE          | LOCAL                  | LINKED     
  ------------------------|------------------------|------------
   supabase/postgres      | 17.6.1.005             | 17.6.1.005 
   supabase/gotrue        | v2.179.0               | v2.179.0   
   postgrest/postgrest    | v13.0.5                | v13.0.5    
   supabase/realtime      | v2.52.0                | -          
   supabase/storage-api   | v1.28.0                | -          
   supabase/edge-runtime  | v1.69.12               | -          
   supabase/studio        | 2025.10.06-sha-426fda2 | -          
   supabase/postgres-meta | v0.91.6                | -          
   supabase/logflare      | 1.22.4                 | -          
   supabase/supavisor     | 2.7.1                  | -          

Root Cause

The issue originates from hardcoded flags in pkg/function/bundle.go:

Lines 46-48:

BundleFlags = []string{
    "--decorator", "tc39",
}

Line 57:

if len(importMap) > 0 {
    args = append(args, "--import-map", importMap)
}

These flags are passed to edge-runtime, which passes them to Deno 2, triggering deprecation warnings.

Fix

Remove deprecated flags from pkg/function/bundle.go since Deno 2 automatically reads configuration from deno.json:

1. Remove --decorator tc39 from BundleFlags
2. Remove --import-map flag from bundling command

Backwards compatibility: Should be safe since edge functions already use deno.json files by default