refactor: extract remaining docker e2e scenarios

scripts/lib/docker-e2e-container.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+#
+# Shared helpers for Docker E2E scripts that keep a named container running
+# while polling readiness from the host.
+
+docker_e2e_docker_cmd() {
+  timeout "${DOCKER_COMMAND_TIMEOUT:-600s}" docker "$@"
+}
+
+docker_e2e_container_running() {
+  local container_name="$1"
+  [ "$(docker_e2e_docker_cmd inspect -f '{{.State.Running}}' "$container_name" 2>/dev/null || echo false)" = "true" ]
+}
+
+docker_e2e_container_exec_bash() {
+  local container_name="$1"
+  shift
+  docker_e2e_docker_cmd exec "$container_name" bash -lc "$*"
+}
+
+docker_e2e_wait_container_bash() {
+  local container_name="$1"
+  shift
+  docker_e2e_wait_container_bash_while_running "$container_name" "$container_name" "$@"
+}
+
+docker_e2e_wait_container_bash_while_running() {
+  local running_container_name="$1"
+  local exec_container_name="$2"
+  local attempts="$3"
+  local sleep_seconds="$4"
+  shift 4
+  local probe="$*"
+
+  for _ in $(seq 1 "$attempts"); do
+    if ! docker_e2e_container_running "$running_container_name"; then
+      return 1
+    fi
+    if docker_e2e_container_exec_bash "$exec_container_name" "$probe" >/dev/null 2>&1; then
+      return 0
+    fi
+    sleep "$sleep_seconds"
+  done
+  return 1
+}
+
+docker_e2e_tail_container_file_if_running() {
+  local container_name="$1"
+  local file_path="$2"
+  local lines="${3:-120}"
+  if docker_e2e_container_running "$container_name"; then
+    docker_e2e_container_exec_bash "$container_name" "tail -n $lines $file_path" || true
+  else
+    docker_e2e_docker_cmd logs "$container_name" 2>&1 | tail -n "$lines" || true
+  fi
+}