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