Marrying NT Emacs and MSYS2 Mercurial?

For the smooth integration I am using Cygwin (with w32 Emacs for native UI + copy/paste). But its `fork` is slow, especially with corporate antivirus. In the past I used NT Emacs with Cygwin and in order to make `hg` work I created an executable wrapper that re-invoke the command stripping `.exe` extension: https://hg.defun.work/utils/file/tip/cygwin/cygrun/cygrun.c Because `hg` is a Python script in Cygwin! And this is not enough: I set `CYGWIN="noglob"`, otherwise braces are removed from expression `--template {rev}`, see https://sourceware.org/legacy-ml/cygwin/2011-11/msg00225.html Now I face the same issue with MSYS2: `hg` is a Python script so Windows apps (фтв ТЕ Уьфсі ші) cannot directly call it... What would you do to marry NT Emacs and MSYS2?

This seems like an interesting question, but a bit hard to understand. You might be more likely to get answers if you add more explanation for those who aren't as familiar with the details.

NT Emacs is able to invoke `.exe` or `.bat` files, not Bash or Python scripts from MSYS. Mercurial comes as a Python script in MSYS so Windows Emacs cannot call it. Wrapper with batch file (`hg.bat` with `c:\msys64\usr\bin\python3 /usr/bin/hg "$@"`) damages arguments enough (quoting??) so Emacs VC mode cannot work with it, I have a C program for Cygwin which I used as a wrapper in the past. I wonder if there are any attempts to befriend NT Emacs & MSYS2 other way around. **PS** Lots of projects create wrapper which are re-calling executables, to workaround Windows stupidity, for example Scoop package manager has so called shims: https://github.com/ScoopInstaller/Shim

Thanks, that's a good explanation. :) If you can't find answers here, you might ask on gnu-emacs-help or emacs-devel.