gistfile1.txt

#!/bin/sh

if [ -z "$XDG_CONFIG_HOME" ]; then
  XDG_CONFIG_HOME="$HOME/.config"
fi

if [ -z "$XDG_DATA_HOME" ]; then
  XDG_DATA_HOME="$HOME/.local/share"
fi

MSYS2_ETC="$XDG_CONFIG_HOME/msys2/etc"
MSYS2_ROOT="$XDG_DATA_HOME/msys2"

mkdir -p "$MSYS2_ROOT/"{mingw32,mingw64,ucrt64,var/cache/pacman,var/lib/pacman,run}

FEDORA_MINGW32_SYSROOT="/usr/i686-w64-mingw32/sys-root/mingw"
FEDORA_MINGW64_SYSROOT="/usr/x86_64-w64-mingw32/sys-root/mingw"

AS_ROOT="--uid 0 --gid 0"

CMD="$@"
if [ -z "$CMD" ]; then
  CMD="$SHELL"
fi

export MSYS2=1

bwrap \
        --unshare-user \
        --share-net \
        $AS_ROOT \
        --bind "$MSYS2_ROOT" / \
        --ro-bind /usr /usr \
        --ro-bind /etc /etc \
        --ro-bind /run/systemd /run/systemd \
        --bind "$HOME" "$HOME" \
        --proc /proc \
        --dev /dev \
        --ro-bind "$MSYS2_ROOT/mingw32" "$FEDORA_MINGW32_SYSROOT" \
        --ro-bind "$MSYS2_ROOT/mingw64" "$FEDORA_MINGW64_SYSROOT" \
        --ro-bind "$MSYS2_ETC/pacman.conf" /etc/pacman.conf \
        --ro-bind "$MSYS2_ETC/pacman.d" /etc/pacman.d \
        --ro-bind "$MSYS2_ROOT" "$MSYS2_ROOT" \
        "$CMD"