chain gateway build fix

ci/scripts/common/ensure_env_version.sh

@@ -4,14 +4,16 @@ set -eu
 echo "[fx-pipeline] rewriting .env.version" >&2
 
 if [ -f ./.env.version ]; then
-  tmp_env="$(mktemp .env.version.sanitized.XXXXXX)"
-  if grep -E '^[[:alpha:]_][[:alnum:]_]*=' ./.env.version >"$tmp_env" 2>/dev/null; then
-    # shellcheck disable=SC1091
-    . "$tmp_env" || true
-  else
-    echo "[fx-pipeline] ignoring legacy .env.version contents" >&2
+  while IFS= read -r line || [ -n "$line" ]; do
+    case "$line" in
+      ''|\#*) continue ;;
+    esac
+    if printf '%s' "$line" | grep -Eq '^[[:alpha:]_][[:alnum:]_]*='; then
+      key="${line%%=*}"
+      value="${line#*=}"
+      export "$key=$value"
     fi
-  rm -f "$tmp_env"
+  done < ./.env.version
 fi
 
 if [ -n "${WOODPECKER_COMMIT:-}" ]; then