Script to convert book from docx to markdown with Pandoc

pandoc-docx-Rmd.bat

:: pandoc-docx-Rmd.bat
::
:: Don't show these commands to the user
@ECHO off
:: Set the title of the window
TITLE Convert docx to markdown with Pandoc
:: Select file marker
:selectfile
:: Clear any preexisting filename variables
SET filename=
:: Ask which file we're converting.
SET /p filename=Which file? (Don't include the .docx file extension): 
:: Feedback
ECHO Running pandoc...
:: Run pandoc
CALL pandoc -f docx -t markdown+auto_identifiers -s "$filename".docx -o "$filename".Rmd --atx-headers --wrap=none --extract-media=""
:: Feedback
ECHO Done. Ready for another file.
:: Let the user easily run that again
SET repeat=
SET /p repeat=Hit enter to convert another file, or any other key and enter to stop. 
IF "%repeat%"=="" GOTO selectfile
:: Otherwise end
:end

pandoc-docx-Rmd.sh

#!/bin/bash
cd -- "$(dirname "$0")"
# That tells the system to use a Bourne shell interpreter,
# and then tells OSX to run this script from the current directory.
# Don't echo these commands:
set +v

repeat=

while [ "$repeat" = "" ]
do
    # Clear any preexisting filename variables
    filename=
    # Ask which file we're converting.
    echo "Which file? (Don't include the .docx file extension): "
    read filename
    # Feedback
    echo "Running pandoc..."
    # Run pandoc
    pandoc -f docx -t markdown+auto_identifiers -s "$filename".docx -o "$filename".Rmd --atx-headers --wrap=none --extract-media=""
    # Feedback
    echo "Done. Ready for another file."
    # Let the user easily run that again
    repeat=
    echo "Hit enter to convert another file, or any other key and enter to stop. "
    read repeat
    # Otherwise end
done