Open a file or directory by the default application from command in the wsl, Like xdg-open.

wsl-open

#!/bin/bash -eu

target=${1:-.}
cmd=

if [[ -d $target ]]; then
  # open directory
  cmd=explorer.exe
fi
if [[ -e $target ]]; then
  # target exists
  target=$(wslpath -a -w "$target")
elif [[ $target == *://* ]]; then
  # open uri
  :
else
  echo "File not found: $target" >&2
  exit 2
fi

# avoid UNC path error in cmd.exe
[[ -d /mnt/c ]] && cd /mnt/c

cmd.exe /c start $cmd "$target"