actionjack

# Bash best practices and style-guide

Just simple methods to keep the code clean.

Inspired by [progrium/bashstyle](https://github.com/progrium/bashstyle) and [Kfir Lavi post](http://www.kfirlavi.com/blog/2012/11/14/defensive-bash-programming/).


## Quick big rules
* All code goes in a function
* Always double quote variables

actionjack

# Source: https://gist.github.com/vfarcic/78c1d2a87baf31512b87a2254194b11c

###############################################################
# How To Create A Complete Internal Developer Platform (IDP)? #
# https://youtu.be/Rg98GoEHBd4                                #
###############################################################

# Additional Info:
# - DevOps MUST Build Internal Developer Platform (IDP): https://youtu.be/j5i00z3QXyU
# - How To Create A "Proper" CLI With Shell And Charm Gum: https://youtu.be/U8zCHA-9VLA

actionjack

0. SSH to server
1. Edit /opt/bitnami/apps/jenkins/jenkins_home/config.xml

2. set userSecurity to false: <userSecurity>false</userSecurity>

3. delete
<authorizationStrategy> and <securityRealm>

4. /etc/init.d/bitnami restart

actionjack

#!/usr/bin/env bash

# seems to work on any filesystem
# final size is (bs * seek) in bytes
# this creates a 4MB sparse file

dd if=/dev/zero of=/tmp/file bs=1 count=0 seek=4194304

# or 

actionjack

import os
import sys
import uuid
import boto3
import tweepy
from urllib.parse import unquote_plus

# Twitter authentication variables
consumer_key = os.environ.get('TWITTER_CONSUMER_KEY', 'ap-northeast-1')
consumer_secret = os.environ.get('TWITTER_CONSUMER_SECRET', 'ap-northeast-1')

actionjack

import requests
import logging
import httplib

# Debug logging
httplib.HTTPConnection.debuglevel = 1
logging.basicConfig()
logging.getLogger().setLevel(logging.DEBUG)
req_log = logging.getLogger('requests.packages.urllib3')
req_log.setLevel(logging.DEBUG)

actionjack

AWS_ROOT_CA_FILE=$HOME/aws.root.ca.bundle.pem
cp /dev/null $AWS_ROOT_CA_FILE

for ca in \
    https://www.amazontrust.com/repository/AmazonRootCA1.pem \
    https://www.amazontrust.com/repository/AmazonRootCA2.pem \
    https://www.amazontrust.com/repository/AmazonRootCA3.pem \
    https://www.amazontrust.com/repository/AmazonRootCA4.pem \
    https://www.symantec.com/content/en/us/enterprise/verisign/roots/VeriSign-Class%203-Public-Primary-Certification-Authority-G5.pem; do

actionjack

import java.util.ArrayList;
import hudson.model.*;

def q = Jenkins.instance.queue
for (queued in Jenkins.instance.queue.items) {
    q.cancel(queued.task)
}

for (job in Jenkins.instance.items) {
    stopJobs(job)

actionjack

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 > some-changes.patch

actionjack

node {
    echo 'Results included as an inline comment exactly how they are returned as of Jenkins 2.121, with $BUILD_NUMBER = 1'
    echo 'No quotes, pipeline command in single quotes'
    sh 'echo $BUILD_NUMBER' // 1
    echo 'Double quotes are silently dropped'
    sh 'echo "$BUILD_NUMBER"' // 1
    echo 'Even escaped with a single backslash they are dropped'
    sh 'echo \"$BUILD_NUMBER\"' // 1
    echo 'Using two backslashes, the quotes are preserved'
    sh 'echo \\"$BUILD_NUMBER\\"' // "1"