copy files with a 'pv' progress bar and rate info

progresscopy

#!/bin/bash

# Ensure that at least two arguments are provided (source(s) and destination)
if [ "$#" -lt 2 ]; then
    echo "Usage: $0 <source1> [<source2> ...] <destination>"
    exit 1
fi

# The last argument is the destination
destination="${@: -1}"

# All arguments except the last one are considered sources
sources=("${@:1:$(($#-1))}")

echo "Destination directory: $destination"
echo "Source item(s): ${sources[*]}"

# Create the destination directory if it does not exist
echo "Ensuring that the destination directory exists..."
mkdir -p "$destination"

# Calculate total size for pv
echo "Calculating total size of source item(s) for progress estimation..."
local total_size=0
if [[ ${#sources[@]} -eq 1 && -d ${sources[0]} ]]; then
    total_size=$(du -sb "${sources[0]}" | cut -f1)
else
    # Handling for multiple files or a glob pattern
    # This calculation assumes all sources are in the same directory or the shell has expanded them correctly
    total_size=$(du -cb "${sources[@]}" 2>/dev/null | tail -1 | cut -f1)
fi

echo "Total size to copy: $total_size bytes"

# Copy process
if [[ ${#sources[@]} -eq 1 && -d ${sources[0]} ]]; then
    echo "Copying directory..."
    tar -cf - -C "${sources[0]}" . | pv -s "$total_size" | tar -xf - -C "$destination"
else
    echo "Copying multiple files/glob..."
    sourcedir="$(dirname "${sources[0]}")"
    tar -cf - -C "$sourcedir" "${sources[@]/#$sourcedir\//}" | pv -s "$total_size" | tar -xf - -C "$destination"
fi

echo "Copy operation completed successfully."