RFR: 8355697: Create windows devkit on wsl and msys2 [v2]

[kuaiwei]

On Mon, 28 Apr 2025 16:19:09 GMT, Frederic Thevenet <fthevenet at openjdk.org> wrote:

> **Please note that this is not a formal review, as I am not an OpenJDK reviewer.**
> 
> `createWindowsDevkit.sh` will fail to run when MSYS2 is started under any other environment[1] other than "MSYS" (i.e. `MINGW64`, `UCRT64`, `CLANG64`, etc...), because for all other env, `uname -s` will return `MINGW64_NT-10.0-26100` instead of `MSYS_NT-10.0-26100` which throws off the cygwin/msys2/wsl detection.
> 
> Is this deliberate, so as to ensure only the MSYS environment is supported for this feature, or an oversight?
> 
> Cheers!
> 
> [1] https://www.msys2.org/docs/environments/

Thanks for testing it. I checked other environments and think it's more reliable to check output of `uname -o` for msys. It always output 'Msys' in my testing.

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PR Comment: https://git.openjdk.org/jdk/pull/24916#issuecomment-2837295634