Update default output of bin/release (#1404)

* Update release script to not contribute a default process type if any `mcp` entries are present in the `Procfile`
---------

Signed-off-by: Colin Casey <[email protected]>

Author: colincasey

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## [Unreleased]
 
+- Release script will not contribute a default process type if any `mcp` entries are present in the Procfile. ([#1404](https://github.com/heroku/heroku-buildpack-nodejs/pull/1404))
 
 ## [v292] - 2025-05-09
 

bin/release

@@ -1,8 +1,17 @@
 #!/usr/bin/env bash
 # bin/release <build-dir>
 
-cat << EOF
+BUILD_DIR=${1:-}
+
+if [ -f "$BUILD_DIR/Procfile" ] && grep -q -e "^\s*mcp.*:" "$BUILD_DIR/Procfile"; then
+  cat << EOF
+addons: []
+default_process_types: {}
+EOF
+else
+  cat << EOF
 addons: []
 default_process_types:
   web: npm start
 EOF
+fi

bin/report

@@ -102,6 +102,7 @@ kv_pair_string "package_manager_request" "$(read_json "$BUILD_DIR/package.json"
 
 # is a procfile with a web process used?
 kv_pair "procfile_with_web_process" "$(has_procfile_with_web_process)"
+
 # is a procfile used?
 if [ -f "$BUILD_DIR/Procfile" ]; then
   kv_pair "procfile_used" "true"