From 3dc620166bd3c914722c04120ec0b127294d66a7 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Mon, 13 Oct 2025 12:53:15 +0900
Subject: win32: Install the same packages as vcpkg even on msys

---
 win32/install-msys-packages.cmd | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100755 win32/install-msys-packages.cmd

diff --git a/win32/install-msys-packages.cmd b/win32/install-msys-packages.cmd
new file mode 100755
index 0000000000..d3adbaf595
--- /dev/null
+++ b/win32/install-msys-packages.cmd
@@ -0,0 +1,29 @@
+::- Install msys packages for rubygems
+::- The dependencies are taken from vcpkg.json to share the common info.
+
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b - 1
+@set PROMPT=$h$e[96m$g$e[39m$s
+@set script=%0
+@call set "srcdir=%%script:\win32\%~nx0=%%"
+
+@if not defined MINGW_PACKAGE_PREFIX (
+    ::- Enable msys environment by ridk (from RubyInstaller-DevKit)
+    where ridk >nul 2>&1 || (
+        (echo MINGW_PACKAGE_PREFIX is not set, you have to enable development environment.) 1>&2
+        exit /b 1
+    )
+    call ridk enable %*
+    echo:
+) else if not "%1" == "" (
+    ::- Switch msys environment by ridk (from RubyInstaller-DevKit)
+    call ridk enable %*
+    echo:
+)
+
+@set pkgs=
+@(
+    for /f %%I in ('powershell -c "(ConvertFrom-Json $input).dependencies"') do @(
+        call set "pkgs=%%pkgs%% %%MINGW_PACKAGE_PREFIX%%-%%%%I"
+    )
+) < "%srcdir%\vcpkg.json"
+pacman -S --needed --noconfirm %pkgs:~1%
-- 
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