Bash script to switch maven configurations by name

m2

#!/usr/bin/env bash

LINK_FILE="$HOME/.m2/settings.xml"

if [ ! -L "$LINK_FILE" ]; then
  echo "This program expects $LINK_FILE to be a symbolic link."
  exit 1
fi

if [ -z "$1" ]; then
  ls -lah "$LINK_FILE"
  #out=$(ls -alh "$LINK_FILE")
  #echo "$out"
  exit 0
fi

TARGET_FILE="$HOME/.m2/$1.settings.xml"

if [ ! -f "$TARGET_FILE" ]; then
  echo "$TARGET_FILE does not exist."
  exit 1
fi

ln -sf "$TARGET_FILE" "$LINK_FILE"

ls -lah "$LINK_FILE"