Start the Firebase emulators for CollabBoard local development.

Current state

•Emulator ports: !lsof -iTCP:4000 -iTCP:8080 -iTCP:9099 -iTCP:9000 -iTCP:5001 -sTCP:LISTEN -P 2>/dev/null | grep LISTEN || echo "no emulator ports in use"
•Firebase CLI available: !command -v firebase >/dev/null && firebase --version 2>/dev/null || echo "NOT INSTALLED"
•Node modules installed: ![ -d node_modules ] && echo "yes" || echo "no"

Steps

Work through these steps in order. Stop and report if any step fails.

1. Check prerequisites

•If Firebase CLI is not installed, stop and tell the user to install it (bun install -g firebase-tools)
•If node_modules is missing, run bun install

2. Check for already-running emulators

Using the port check results from above:

•If ports 4000/8080/9099 are already in use: Emulators are likely already running. Verify by checking if port 4000 (Emulator UI) responds with curl -sf http://localhost:4000. If it does, tell the user emulators are already running and stop.
•If some emulator ports are bound but not all: Something is partially running or another process is conflicting. Warn the user, list which ports are occupied and by what process, and ask how to proceed.

3. Start Firebase emulators

Run in background:

bash

bun run emulators

Then poll until the Emulator UI is responding (up to 30 seconds):

bash

for i in $(seq 1 30); do curl -sf http://localhost:4000 > /dev/null 2>&1 && break; sleep 1; done

If it doesn't come up in 30 seconds, show the emulator output and ask the user to investigate.

4. Report status

Print a summary:

code

Firebase emulators ready:
  Emulator UI:  http://localhost:4000
  Firestore:    localhost:8080
  Auth:         localhost:9099
  RTDB:         localhost:9000
  Functions:    localhost:5001

Include any warnings (skipped services, etc.).