live_update: i would like to `run` without `sync`

[TomK]

Describe the Feature You Want

i would like to be able to run a command on a live update, without having to have a preceding sync that matches.

Current Behavior

a LiveUpdate line is logged out, then every container using this image is restarted

UpdateStopped: Found file(s) not matching any sync (files: [.....])

Why Do You Want This?

We have a simple container based on PHP, we use the same container for many different applications. The php files are mounted into the containers with a volume, removing the need for sync. However, we also utilise workerman, a long running process which speeds up php by caching the parsed source files. This requires a command to be run when a file changes.

To be clear, sync is unnecessary because the file system is mounted.

I would like to simply execute this command in a live_update on our docker_build:

docker_build('base-runner',src_path,dockerfile_contents='''
    FROM php:8.2-alpine
    RUN docker-php-ext-configure pcntl --enable-pcntl \
      && docker-php-ext-install pcntl;

    ENV APP_NAME="unknown"

    RUN echo "php /SHARED_CODE/\\${APP_NAME}/cubex start" > /run.sh
    RUN chmod +x /run.sh

    RUN echo "php /SHARED_CODE/\\${APP_NAME}/cubex reload" > /reload.sh
    RUN chmod +x /reload.sh

    CMD [ "/run.sh" ]
     ''', live_update=[run('/reload.sh')])

---

app-1

apiVersion: apps/v1
kind: Deployment
spec:
    spec:
      restartPolicy: Always
      containers:
        - name: php-app-1
          env:
            - name: APP_NAME
              value: app-1
          image: base-runner
          imagePullPolicy: IfNotPresent
          volumeMounts:
            - name: code
              mountPath: /SHARED_CODE
      volumes:
        - name: code
          hostPath:
            path: /development/codebase

app-2

apiVersion: apps/v1
kind: Deployment
spec:
    spec:
      restartPolicy: Always
      containers:
        - name: php-app-2
          env:
            - name: APP_NAME
              value: app-2
          image: base-runner
          imagePullPolicy: IfNotPresent
          volumeMounts:
            - name: code
              mountPath: /SHARED_CODE
      volumes:
        - name: code
          hostPath:
            path: /development/codebase