Per-month Temp rotated directory in Linux

temp-rotate.sh

#!/usr/bin/env sh

# Repo: https://gist.github.com/MurzNN/b3b7ecd3ab340786127e35822bbf5c95
#
# A script to manage the per-month temp directory in Linux system.
# It creates a new directory for every new month and updates the
# symlink `~/!temp` to the directory of the current month.
# Configure this script to run every day:
# ```
# systemd-run --user --unit=temp-rotate --on-calendar=daily --timer-property=Persistent=true ~/.local/share/temp-rotate/temp-rotate.sh
# ```

TEMP_LOCATION=~/temp-archive
LINK=~/!temp

MONTH=`date +'%Y-%m'`

if [ ! -d $TEMP_LOCATION ]; then
  echo "Temp storage folder $TEMP_LOCATION is missing, creating."
  mkdir $TEMP_LOCATION
fi

FOLDER=$TEMP_LOCATION/$MONTH

if [ ! -d $FOLDER ]; then
  echo "Month storage folder $FOLDER is missing, creating."
  mkdir $FOLDER
  cat <<EOF > $FOLDER/.directory
[Desktop Entry]
Icon=folder-temp
EOF

fi

if [ ! "$(readlink $LINK)" = "$FOLDER" ]; then
  echo "Update symlink to current month: $FOLDER"
  if [ -e "$LINK" ]; then
    if [ -L "$LINK" ]; then
      rm $LINK
    else
      echo "The main link location is busy, remove the directory manually and run again."
      exit 1
    fi
  fi
  ln -sfn $FOLDER $LINK
fi