use sh for inner script

epm-docker-test.sh

@@ -381,31 +381,30 @@ build_container_script() {
   local script_path="$1"
 
   cat >"$script_path" <<'EOF'
-#!/usr/bin/env bash
+#!/bin/sh
 
-set -euo pipefail
+set -eu
 
 TEST_COMMAND="$1"
 APP_NAME="$2"
 SOURCE_DIR="/work/eepm"
 
 run_eepm() {
-  bash ./bin/eepm "$@"
+  ./bin/eepm "$@"
 }
 
 os_id="unknown"
-if [[ -r /etc/os-release ]]; then
-  # shellcheck disable=SC1091
+if [ -r /etc/os-release ]; then
   . /etc/os-release
   os_id="${ID:-unknown}"
 fi
 
 printf '[container] bootstrap: os_id=%s\n' "$os_id" >&2
 
-[[ -f "$SOURCE_DIR/bin/eepm" ]] || {
+if [ ! -f "$SOURCE_DIR/bin/eepm" ]; then
   printf '[container] eepm tree does not contain ./bin/eepm\n' >&2
   exit 3
-}
+fi
 
 export HOME="/tmp/epm-home"
 mkdir -p "$HOME"
@@ -429,7 +428,7 @@ esac
 
 case "$TEST_COMMAND" in
   play)
-    exec bash ./bin/eepm play --auto "$APP_NAME"
+    exec ./bin/eepm play --auto "$APP_NAME"
     ;;
   *)
     printf '[container] unsupported test command: %s\n' "$TEST_COMMAND" >&2
@@ -470,7 +469,7 @@ run_container_locally() {
     --volume "$resolved_source:/work/eepm:ro" \
     --volume "$inner_script:/tmp/epm-docker-test-inner.sh:ro" \
     "$SYSTEM_IMAGE" \
-    bash /tmp/epm-docker-test-inner.sh "$COMMAND" "$APP_NAME"; then
+    sh /tmp/epm-docker-test-inner.sh "$COMMAND" "$APP_NAME"; then
     status=0
   else
     status=$?