Using Windows env var %APPDATA% in WSL

I remember Cygwin always inherited Windows environment variables in bash session. In WSL world, there’s another way via WSLENV and it’s explained below.

“WSLENV” to enhance environmental variable interop between Win32/WSL

Share Environment Vars between WSL and Windows – Windows Command Line

If you don’t need to reference Win10 env. var. often from WSL, maybe using powershell.exe like below is good enough.

$ powershell.exe -command 'echo $Env:APPDATA'|tr -d '\r'
C:\Users\kinoue\AppData\Roaming

As an example, this is how to backup Office365 MS-Word global template file Normal.dotm.

$ cp -p $(wslpath $(powershell.exe -command \
 'echo $Env:APPDATA'|tr -d '\r'))/Microsoft/Templates/Normal.dotm{,.backup}
$ command ls -l $(wslpath $(powershell.exe -command \
 'echo $Env:APPDATA'|tr -d '\r'))/Microsoft/Templates/Normal.dotm*
-rwxrwxrwx 1 kinoue kinoue 19229 Jul 24  2018 /mnt/c/Users/kinoue/AppData/Roaming/Microsoft/Templates/Normal.dotm
-rwxrwxrwx 1 kinoue kinoue 19229 Jul 24  2018 /mnt/c/Users/kinoue/AppData/Roaming/Microsoft/Templates/Normal.dotm.backup