Migration script - rename files to kebab-lowercase and add a heading to the start

migration.sh

# Loop over all markdown files
for file in *.md

  do

    # Remove the file extension
    filename=${file%.*}


    # Create new filename it by replacing spaces with - and lowercasing it
    newFileName="`echo $file | sed s/\ /\-/g | tr 'A-Z' 'a-z'`"

    # Rename file
    mv "$file" "$newFileName"

    # Capitalize the first letter for heading
    heading="$(tr '[:lower:]' '[:upper:]' <<< ${filename:0:1})${filename:1}"

    # Add heading to file
    # echo "# $heading\n" >> $file

    # Add heading to file
    # TODO this part is not working
    sed -i '' "# $heading\n" $newFileName
  done