CARBONNEAUX Mathieu mcarbonneaux

Steps to migrate from SVN to GitLab

This process worked for me. I take no responsibility for any damage or loss incurred as a result of following or not following these steps or, for that matter, anything else you might do or not do.

Setup

SVN is hosted at svn.domain.com.au.
SVN is accessible via http (other protocols should work).
GitLab is hosted at git.domain.com.au and:

Introductory Material

Add Graal JIT Compilation to Your JVM Language in 5 Steps, A Tutorial http://stefan-marr.de/2015/11/add-graal-jit-compilation-to-your-jvm-language-in-5-easy-steps-step-1/
The SimpleLanguage, an example of using Truffle with great JavaDocs. It is the officle getting-started project: https://github.com/graalvm/simplelanguage
Truffle Tutorial, Christan Wimmer, PLDI 2016, 3h recording https://youtu.be/FJY96_6Y3a4 Slides

How to generate and apply patches with git?

It sometimes happen you need change code on a machine from which you cannot push to the repo. You’re ready to copy/paste what diff outputs to your local working copy.

You think there must be a better way to proceed and you’re right. It’s a simple 2 steps process:

1. Generate the patch:

git diff &gt; some-changes.patch

Use curl to get the JSON response for the latest release
Use grep to find the line containing file URL
Use cut and tr to extract the URL
Use wget to download it

curl -s https://api.github.com/repos/jgm/pandoc/releases/latest \
| grep "browser_download_url.*deb" \
| cut -d : -f 2,3 \
| tr -d \" \

Symmetic encryption

For symmetic encryption, you can use the following:

To encrypt:

openssl aes-256-cbc -salt -a -e -in plaintext.txt -out encrypted.txt

To decrypt:

The newer versions of bash (>= 3.0) include a regex operator =~

Simple example

$ re='t(es)t'
$ [[ "test" =~ $re ]]
$ echo $?
0
$ echo ${BASH_REMATCH[1]}
es

	import javax.crypto.Cipher;

	class Test {
	public static void main(String[] args) {
	try {
	System.out.println("Hello World!");
	int maxKeyLen = Cipher.getMaxAllowedKeyLength("AES");
	System.out.println(maxKeyLen);
	} catch (Exception e){
	System.out.println("Sad world :(");

	/**
	* Check if a given ip is in a network
	* @param string $ip IP to check in IPV4 format eg. 127.0.0.1
	* @param string $range IP/CIDR netmask eg. 127.0.0.0/24, also 127.0.0.1 is accepted and /32 assumed
	* @return boolean true if the ip is in this range / false if not.
	*/
	function ip_in_range( $ip, $range ) {
	if ( strpos( $range, '/' ) == false ) {
	$range .= '/32';
	}

	:: This version is not as powerfull as vbs version, please prefere the other one.
	:: It's just there if you need a non-visual basic way to perform this.
	:: Restrictions:
	:: - Password cannot contain a % or finish with @
	:: - Chrome adds a / at the end of the URL, not yet managed

	:: The aim of this script is to execute putty with parameters like ssh://login@host
	:: Installation:
	:: - Launch putty.reg to associate ssh:// and telnet:// to this script
	:: - Edit the putty path in parameter below like puttyPath="C:\Program Files (x86)\putty.exe"

	// Uses the default AWS SDK Credentials; e.g. via the environment
	// AWS_REGION=region AWS_ACCESS_KEY_ID=key AWS_SECRET_ACCESS_KEY=secret
	package main

	import (
	"bytes"
	"flag"
	"fmt"
	"io"
	"log"