1 files changed, 19 insertions, 0 deletions
diff --git a/tool/missing-baseruby.bat b/tool/missing-baseruby.bat
new file mode 100755
index 0000000000..87a9857e06
--- /dev/null
+++ b/tool/missing-baseruby.bat
@@ -0,0 +1,19 @@
+:"" == "
+@echo off || (
+  :warn
+    echo>&2.%~1
+  goto :eof
+  :abort
+    exit /b 1
+)||(
+:)"||(
+  s = %^#
+)
+: ; call() { local call=${1#:}; shift; $call "$@"; }
+: ; warn() { echo "$1" >&2; }
+: ; abort () { exit 1; }
+
+call :warn "executable host ruby is required.  use --with-baseruby option."
+call :warn "Note that BASERUBY must be Ruby 3.0.0 or later."
+call :abort
+: || (:^; abort if RUBY_VERSION < s[%r"warn .*Ruby ([\d.]+)(?:\.0)?",1])