#!/bin/bash
# moves a directory and then links it back
# good for moving directories from one partition to another but without changing any settings

SCRIPT_NAME='mvln'
USAGE_STRING='usage: '$SCRIPT_NAME' <source_path> <destination_dir_path>'

# Show usage and exit with status
show_usage_and_exit () {
    echo $USAGE_STRING
    exit 1
}

# ERROR file does not exist
no_file () {
    echo $SCRIPT_NAME': '$1': No such file or directory'
    exit 2
}

# Check syntax
if [ $# -ne 2 ]; then
    show_usage_and_exit
fi

# Check file existence
if [ ! -e "$1" ]; then
    no_file $1
fi

# Get paths
source_path=$1
destination_path=$2

# Check that destination ends with a slash
[[ $destination_path != */ ]] && destination_path="$destination_path"/

# Move source
[[ -d "$destination_path" ]] || mkdir -p "$destination_path"
mv "$source_path" "$destination_path"

# Get original path
original_path=$destination_path$(basename $source_path)

# Create symlink in source dir
ln -s "$original_path" "${source_path%/}"