Abhishek Kumar isurfer21

Visionary logical man. Loves to simplify things. Eager to automate process. Craves for research.

3 followers · 3 following

View GitHub Profile

Recently created

Least recently created

Recently updated

Least recently updated

isurfer21 / gen-video-list.ts

Created December 4, 2025 16:17

A CLI tool to generate video list for a given directory to be used with FFmpeg app.

isurfer21 / sync-dir.sh

Created November 30, 2025 07:15

Shell script to synchronize source directory to target directory on external hard disk

	#!/bin/zsh

	# Script to synchronize source directory to target directory on external hard disk
	# Default: one-way sync without deleting files on target.
	# Options:
	# -d, --dry → Simulate deletions (dry-run with --delete)
	# -x, --prune → Perform actual deletions (--delete)
	# -h, --help → Show help menu

	show_help() {

isurfer21 / node_modules_age.sh

Last active August 5, 2025 05:33

A CLI tool which calculates the age of the node_modules directory in days.

	#!/bin/bash

	# Define the path to the node_modules directory
	NODE_MODULES_DIR="node_modules"

	# Check if node_modules directory exists
	if [ ! -d "$NODE_MODULES_DIR" ]; then
	echo "node_modules directory does not exist."
	else
	# Get the last modified time of the most recently modified file in node_modules

isurfer21 / generate_ssh_key.sh

Created July 15, 2025 04:02

Here's a simple Bash script that generates an SSH key pair (if one doesn't already exist) and displays the public key so you can copy it to a remote system for SSH access:

	#!/bin/bash

	# Set the key file path
	KEY_PATH="$HOME/.ssh/id_rsa"

	# Check if the SSH key already exists
	if [ -f "$KEY_PATH.pub" ]; then
	echo "SSH key already exists at $KEY_PATH.pub"
	else
	echo "Generating a new SSH key..."

isurfer21 / concatenate-files.sh

Last active July 3, 2025 09:03

Here's a Bash script that recursively traverses a directory, reads each file, and concatenates them into a single output file. It adds a comment at the top of each file's content using the appropriate syntax based on the file extension.

	#!/bin/bash

	# Function to get relative path from given absoule path & base path
	get_relative_path() {
	local absolute_path="$1"
	local base_path="$2"

	# Remove trailing slashes for consistency
	absolute_path="${absolute_path%/}"
	base_path="${base_path%/}"

isurfer21 / concatenate_files_to_markdown.sh

Last active May 21, 2025 08:27

Created a bash script to concatenate all the files in the directory and their sub-directories (of source code) along with their filename into single consolidated file in markdown format persisting file type

	#!/bin/bash

	# Script to concatenate all files in a directory and its subdirectories
	# into a single markdown file with filenames and content preserved.
	# Usage: ./concatenate_files_to_markdown.sh [source_directory] [output_file.md]
	# Defaults: source_directory = current directory, output_file.md = consolidated.md

	SOURCE_DIR="${1:-.}"
	OUTPUT_FILE="${2:-consolidated.md}"

isurfer21 / merge-pdfs.sh

Created November 19, 2024 13:05

Here is a Bash script that takes command line arguments for the source PDF files and the output merged PDF file. The script uses Ghostscript (gs) to merge the specified PDF files.

	#!/bin/bash

	# Check if at least two arguments are provided (at least one source and one output)
	if [ "$#" -lt 2 ]; then
	echo "Usage: ${0##*/} output.pdf source1.pdf [source2.pdf ... sourceN.pdf]"
	exit 1
	fi

	# The first argument is the output file
	output_file="$1"

isurfer21 / png2jpg.sh

Created October 24, 2024 16:06

ImageMagick based command-line utility shell script to convert `png` to `jpg` with white background if having transparent background by default

	#!/bin/bash

	# Function to print help message
	function print_help() {
	app_name=${0##*/}
	echo "Syntax: $app_name <input_image> <output_image>"
	echo " -h: Display this help message"
	echo "Usage: "
	echo " $app_name input.png output.jpg"
	echo " $app_name '*.png' output.jpg"

isurfer21 / rust.sh

Created July 19, 2024 03:16

A bash script expects rust filename then compiles, executes & deletes binary to automate the process

	#!/bin/bash

	HELP_MENU="Usage: ${0##*/} [-h\|--help] <rust_filename>
	Compile and run a Rust file, then delete the binary.

	Options:
	-h, --help Show this help menu
	"

	if [ $# -eq 0 ]; then

isurfer21 / copy-file.sh

Last active July 3, 2024 06:17

A CLI tool is a bash script that creates multiple copies of a specified file, renaming each copy with an incrementing number.

	#!/bin/bash

	# Check if the required arguments are provided
	if [ $# -ne 2 ]; then
	echo "Usage: ${0##*/} <file-path> <copy-count>"
	exit 1
	fi

	# Assign the arguments to variables
	file_path=$1

NewerOlder

	#!/usr/bin/env bun

	import { readdir, writeFile, stat } from 'fs/promises';
	import { resolve, join, extname } from 'path';

	// Define common video file extensions (lowercase)
	const VIDEO_EXTENSIONS = new Set([
	'.mp4', '.mkv', '.avi', '.mov', '.wmv', '.flv', '.webm', '.m4v', '.3gp'
	]);