made scripts more robust

scripts/setup-env.sh

@@ -1,15 +1,22 @@
-#!/usr/bin/env bash
-set -e
+#!/usr/bin/env zsh
+
 # -------------------------------------------------------------------
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+if [ -n "$BASH_SOURCE" ]; then
+    SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+elif [ -n "$ZSH_NAME" ]; then
+    SCRIPT_DIR="$(cd "$(dirname "${(%):-%N}")" && pwd)"
+else
+    echo "This script must be run with bash or zsh!" >&2
+    exit 1
+fi
 source "${SCRIPT_DIR}/setup-paths.sh"
 
 # -------------------------------------------------------------------
 
 # Sanity checks
 if [ ! -d "${POKY_DIR}" ]; then
-    echo "ERROR: poky not found at ${POKY_DIR}"
+    echo "ERROR: poky not found at ${POKY_DIR}" >&2
     return 1 2>/dev/null || exit 1
 fi