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direnv on Windows

Overview

In JavaScript projects, I used to use dotenv so that I could put local environment variables in a .env file for local development. But dotenv requires you to add code to your project. With direnv, you can put local env vars in a .envrc file and those env vars are loaded automatically in the shell.

Steps to install

For these steps, it is assummed that you have installed Git Bash on Windows. I also use VSCode as my editor.

1. Create a folder such as c:\tools to put the direnv.exe file and add it to the Windows PATH

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export HADOOP_HOME=/Users/username/Tools/hadoop-3.1.0
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
 
alias hstart=$HADOOP_HOME/sbin/start-all.sh
alias hstop=$HADOOP_HOME/sbin/stop-all.sh
 
export HIVE_HOME=/Users/username/Tools/apache-hive-2.3.3-bin
export PATH=$PATH:$HIVE_HOME/bin

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Generate Jar with dependencies (fatJar) using Gradle

There are multiple posts (old and new) with instructions on how to generate a fat jar, this is, a jar file for your application containing also your application's dependencies. Most solutions I have tried did not work for me, even in a simple Hello World java application, but I have found one that seems to work as expected.

Here it is:

Instructions

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2021 Update: Easiest option is Justin's repo and image

Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).

docker run -it --rm --privileged --pid=host justincormack/nsenter1

more info: https://github.com/justincormack/nsenter1

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.data
 prompt: .asciiz "Encrypt(E) or Decrypt(D) ?"
 indata: .space 20
 plaintext: .asciiz "Enter Plain text: "
 ciphertext: .asciiz "Enter Cipher text: "
 data: .space 40
 Key: .asciiz "Key ?"
 WrongKeyword: .asciiz "\nPlease enter a valid character"
.text
main:

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#
# https://help.github.com/articles/dealing-with-line-endings/
#
# These are explicitly windows files and should use crlf
*.bat           text eol=crlf

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def modular_sqrt(a, p):

    def legendre_symbol(a, p):
        """ Compute the Legendre symbol a|p using
            Euler's criterion. p is a prime, a is
            relatively prime to p (if p divides
            a, then a|p = 0)

            Returns 1 if a has a square root modulo
            p, -1 otherwise.

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# Basics of Elliptic Curve Cryptography implementation on Python
import collections


def inv(n, q):
    """div on PN modulo a/b mod q as a * inv(b, q) mod q
    >>> assert n * inv(n, q) % q == 1
    """
    for i in range(q):
        if (n * i) % q == 1:

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'''
620031587
Net-Centric Computing Assignment
Part A - RSA Encryption
'''

import random


'''

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#!/usr/bin/env python3

p = 61
q = 53

n = p*q
phi = (p-1)*(q-1)

# Took from SO
def egcd(a, b):