Build back-end (CLI) of mkvtoolnix from git on MSYS2

mkvtoolnix.sh

#!/usr/bin/bash

update-core
pacman -Suu
if [ "$MSYSTEM" == "MSYS" ] ; then
 pacman -S git
 pacman -S base-devel
 pacman -S ruby
else
 cd ~
 if [ -d mkvtoolnix ] ; then
  cd mkvtoolnix
  git pull
 else
  [ "$MSYSTEM" == "MINGW32" ] && b=i686
  [ "$MSYSTEM" == "MINGW64" ] && b=x86_64
  mb=mingw-w64-$b
  echo $mb
  pacman -S $mb-toolchain
  pacman -S $mb-libebml
  pacman -S $mb-libmatroska
  pacman -S $mb-libogg
  pacman -S $mb-libvorbis
  pacman -S $mb-zlib
  pacman -S $mb-boost
  pacman -S $mb-flac
  pacman -S $mb-curl
  git clone git://github.com/mbunkus/mkvtoolnix.git
  cd mkvtoolnix
 fi
  grep -q ${MSYSTEM,,} build-config  || {
  ./autogen.sh
  ./configure --with-boost=/${MSYSTEM,,}
  ./drake clean
  }
 ./drake
 mv -f src/*.exe /${MSYSTEM,,}/bin
 mv -f src/tools/*.exe /${MSYSTEM,,}/bin
fi

set bit=32
cd c:\msys%bit%
msys2_shell.bat
./mkvtoolnix.sh
exit
mingw%bit%_shell.bat
./mkvtoolnix.sh

Tested only:
mkvmerge.exe
mkvextract.exe
mkvpropedit.exe
mkvinfo.exe
ebml_validator.exe
All with shared libraries

Building with a mingw (shared libraries) on windows with MSYS2.

• MSYS2 installation.
• a MSYS2 from https://sourceforge.net/projects/msys2/
• roughly 5 GB of free space available.
  The rest of this guide assumes that you've installed MSYS2
  into the directory c:\msys64.
• Build script.
• Load mkvtoolnix.sh to ~
• MSYS2 preparations.
• Fist run from windows:
  c:\msys64\msys2_shell.bat
• From the ~ run:
  ./mkvtoolnix.sh
exit
• Execution for 64 bit binaries.
• For 64bit binaries run from windows:
  c:\msys64\mingw64_shell.bat
• From the ~ run:
  ./mkvtoolnix.sh
  If everything works fine you'll end up with a configured MKVToolNix
  source tree, build binares and copied it to c:\msys64\mingw64\bin
  Use it on windows from c:\msys64\mingw64\bin.
• Execution for 32 bit binaries.
• For 32bit binaries run from windows:
  c:\msys64\mingw32_shell.bat
• From the ~ run:
  ./mkvtoolnix.sh
  If everything works fine you'll end up with a configured MKVToolNix
  source tree, build binares and copied it to c:\msys64\mingw32\bin.
  Use it on windows from c:\msys64\mingw32\bin