In Jenkins, how to checkout a project into a specific directory (using GIT)

node{
    sh"""
    mkdir('foo')
    """
    dir ('foo') {
        git branch: "<ref spec>", changelog: false, poll: false, url: '<clone url>'
        ......
    }
}

from : https://stackoverflow.com/questions/9767919/in-jenkins-how-to-checkout-a-project-into-a-specific-directory-using-git

passing variable to bash script in a jenkins pipeline job

def UNIQUE = sh(returnStdout: true, script: 'uuidgen').trim()

from : https://stackoverflow.com/questions/40323490/passing-variable-to-bash-script-in-a-jenkins-pipeline-job

How do I make curl ignore the proxy?

curl --noproxy "*" http://www.stackoverflow.com

vi ~/.curlrc

noproxy=*

proxy=yourproxy.com:8080

from : https://stackoverflow.com/questions/800805/how-do-i-make-curl-ignore-the-proxy

Replace one substring for another string in shell script

#!/bin/bash
firstString="I love Suzi and Marry"
secondString="Sara"
echo "${firstString/Suzi/$secondString}"    
# prints 'I love Sara and Marry'

EXAMPLE 2:
URL="http://hostname/project/branches/Old_Branch/package"
SRC="Old_Branch"
REP="New_Branch"

echo "${URL/$SRC/$REP}"

from : https://stackoverflow.com/questions/13210880/replace-one-substring-for-another-string-in-shell-script

Loop through an array of strings in Bash?

## declare an array variable
declare -a arr=("element1" "element2" "element3")

## now loop through the above array
for i in "${arr[@]}"
do
   echo "$i"
   # or do whatever with individual element of the array
done

# You can access them using echo "${arr[0]}", "${arr[1]}" also

from : https://stackoverflow.com/questions/8880603/loop-through-an-array-of-strings-in-bash

In Bash, how can I check if a string begins with some value?

This snippet on the Advanced Bash Scripting Guide says:

# The == comparison operator behaves differently within a double-brackets
# test than within single brackets.

[[ $a == z* ]]   # True if $a starts with a "z" (wildcard matching).
[[ $a == "z*" ]] # True if $a is equal to z* (literal matching).

string='My long string'
if [[ $string == *"My long"* ]]; then
  echo "It's there!"
fi

from : https://stackoverflow.com/questions/2172352/in-bash-how-can-i-check-if-a-string-begins-with-some-value

Print array elements on separate lines in Bash?

Try doing this :

$ printf '%s\n' "${my_array[@]}"

from : https://stackoverflow.com/questions/15691942/print-array-elements-on-separate-lines-in-bash

Create array in loop from number of arguments

You can use the += operator to append to an array.

args=()
for i in "$@"; do
    args+=("$i")
done
echo "${args[@]}"

from : https://stackoverflow.com/questions/15420790/create-array-in-loop-from-number-of-arguments

Run bash command on jenkins pipeline

The Groovy script you provided is formatting the first line as a blank line in the resultant script. The shebang, telling the script to run with /bin/bash instead of /bin/sh, needs to be on the first line of the file or it will be ignored.

So instead, you should format your Groovy like this:

stage('Setting the variables values') {
    steps {
         bash '''#!/bin/bash
                 echo "hello world" 
         '''
    }
}

from : https://stackoverflow.com/questions/44330148/run-bash-command-on-jenkins-pipeline

Is there a better way to write this null check, and a non-empty check, in groovy?

There is indeed a Groovier Way.

if(members){
    //Some work
}

from : https://stackoverflow.com/questions/17256855/is-there-a-better-way-to-write-this-null-check-and-a-non-empty-check-in-groovy/17256864

Check if a file exists in jenkins pipeline

def exists = fileExists 'file'

if (exists) {
    echo 'Yes'
} else {
    echo 'No'
}

from : https://stackoverflow.com/questions/38534781/check-if-a-file-exists-in-jenkins-pipeline

Sonar_Integration_with_Jenkins.MD

SonarQube Integration with Jenkins

Integration SonarQube server with Jenkins is necessary to store your reports. Follow below steps to enable that.

Follow this in YouTube

Prerequisites

1. SonarQube Server Get Help here
2. Jenkins Server Get Help here

Implementation

Login to Jenkins server and install sonarqube scanner.

• SonarQube scanner URL : https://docs.sonarqube.org/display/SCAN/Analyzing+with+SonarQube+Scanner
• Package : https://sonarsource.bintray.com/Distribution/sonar-scanner-cli/sonar-scanner-cli-3.2.0.1227-linux.zip

# wget https://sonarsource.bintray.com/Distribution/sonar-scanner-cli/sonar-scanner-cli-3.2.0.1227-linux.zip
# unzip sonar-scanner-cli-3.2.0.1227-linux.zip
# mv sonar-scanner-3.2.0.1227-linux /opt/sonar_scanner 

Set SonarQube server details in sonar-scanner property file

• Sonar properties file: /opt/sonar_scanner/conf/sonar-scanner.properties
  • sonar.host.url=http://<SONAR_SERVER_IP>:9000

Login to Jenkins GUI console and install " SonarQube scanner" plugin

• Manage Jenkins > Manage Plugins > Avalable > SonarQube scanner

Configure SonarQube scanner home path

• Manage Jenkins > Global Tool Configuration > SonarQube Scanner
  • Name : sonar_scanner
  • SONAR_RUNNER_HOME : /opt/sonar_scanner

Configure SonarQube server name and authentication token

• Manage Jenkins > Configure Systems > SonarQube Servers
  • Name : SonarQube
  • ServerURL : http://<Sonarqube_server>:9000/sonar
  • Server authentication token To Get Authentication code follow below steps. Login to SonarQube server as a admin My Account > Security > Generate Token

Create a job to test SonarQube. Provide below sonar properties details in the job under build

• Build:
  • Execute SonarQube Scanner > Analysis properties (it is mandatary).
    • sonar.projectKey=Valaxy
    • sonar.projectName=ValaxyDemo
    • sonar.projectVersion=1.0
    • sonar.sources=/var/lib/jenkins/workspace/$JOB_NAME/<PROJECT_NAME>/src

Execute job to get analysis report.

Next Step

•  Nexus Installation

from : https://github.com/ValaxyTech/DevOpsDemos/blob/master/SonarQube/Sonar_Integration_with_Jenkins.MD

sonarqube-docker-compose.yml

version: "3"
	services:
	sonarqube:
	image: sonarqube
	expose:
	- 9000
	ports:
	- "127.0.0.1:9000:9000"
	networks:
	- sonarnet
	environment:
	- SONARQUBE_JDBC_URL=jdbc:postgresql://db:5432/sonar
	- SONARQUBE_JDBC_USERNAME=sonar
	- SONARQUBE_JDBC_PASSWORD=sonar
	volumes:
	- sonarqube_conf:/opt/sonarqube/conf
	- sonarqube_data:/opt/sonarqube/data
	- sonarqube_extensions:/opt/sonarqube/extensions
	- sonarqube_bundled-plugins:/opt/sonarqube/lib/bundled-plugins
	db:
	image: postgres
	networks:
	- sonarnet
	environment:
	- POSTGRES_USER=sonar
	- POSTGRES_PASSWORD=sonar
	volumes:
	- postgresql:/var/lib/postgresql
	- postgresql_data:/var/lib/postgresql/data
	networks:
	sonarnet:
	volumes:
	sonarqube_conf:
	sonarqube_data:
	sonarqube_extensions:
	sonarqube_bundled-plugins:
	postgresql:
	postgresql_data:

from : https://gist.github.com/Warchant/0d0f0104fe7adf3b310937d2db67b512