`kamal app exec` does not quote it's arguments

[arturaz]

kamal 2.7.0

$ kamal app exec -d staging /app/bin/appServer maintenance 'We are upgrading our infrastructure, we will be back soon.'
Get most recent version available as an image...
Launching command with version latest-staging from new container...
  INFO [6a00eb16] Running docker login europe-west2-docker.pkg.dev -u [REDACTED] -p [REDACTED] on REDACTED
  INFO [6a00eb16] Finished in 1.345 seconds with exit status 0 (successful).
  INFO [62747e3a] Running docker run --rm --network kamal --env REDACTED="true" --env REDACTED="postgres" --env REDACTED="REDACTED" --env REDACTED="127.0.0.1" --env REDACTED="3005" --env REDACTED="REDACTED-postgresql" --env REDACTED="redis://REDACTED-redis" --env REDACTED="https://dev.REDACTED.com" --env-file .kamal/apps/REDACTED-staging/env/roles/web.env --log-opt max-size="10m" europe-west2-docker.pkg.dev/REDACTED-448312/docker/REDACTED-staging:latest-staging /app/bin/appServer maintenance We are upgrading our infrastructure, we will be back soon. on REDACTED
  ERROR (SSHKit::Command::Failed): Exception while executing on host REDACTED: docker exit status: 1
docker stdout: 
...
Unknown command: maintenance We are upgrading our infrastructure, we will be back soon.
docker stderr: Nothing written

The appServer should receive "maintenance" "We are upgrading our infrastructure, we will be back soon." as arguments.

Workaround:

#!/bin/bash

set -e

if [ -z "$1" ];  then
  echo "Usage: $0 <destination> [args]"
  exit 1
fi

destination="$1"
shift

# This correctly handles all special characters, including single quotes.
quoted_args=$(printf '%q ' "$@")

# Construct the full command string that will be executed on the remote.
remote_command="/app/bin/appServer $quoted_args"

# Pipe the command string into an interactive bash session via kamal.
# The remote bash shell will read the command from its stdin and execute it.
echo "$remote_command" | kamal app exec -d "$destination" --interactive -- bash