Shell command used in actual work - sed

background

At present, the interface automation of running is through Testng + Jenkins To do the , But the project may run on different platforms , Different platforms have different ip.

At present, it is used Jenkins Parameterized build function of , Every time I run , Manually enter a ip, And then ip Automated testing of services .

Testng The configuration file for the framework is application.properties, We will serve ip Record in this file .

demand

According to from Jenkins Incoming parameter , Dynamic modification application.properties Medium ip Variable , Then carry out the follow-up test .

application.properties Example

server_ip=http://192.168.100.100

port=9000

path=/home/data

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Demand analysis

At present, the methods thought of are 2 individual :

• use python The script reads the file , Regular substitution formulates text , Generate a new file
• use shell Script to operate

From the simplest point of view , Give priority to shell Methods .

Linux Yes 3 Swordsman : grep ,sed, awk. among grep Mainly for filtration , sed Mainly do text related processing ( Such as modification and replacement ),awk Mainly do data processing , Report output, etc . So we should consider using sed Order to solve this problem .

Actual operation

1. From the Internet search under the relevant sed usage , Reference link : https://blog.csdn.net/ganfanren00001/article/details/122765854

What is used this time sed Command screenshot

1. The lines , This is how I use

sed "/server_ip=/c server_ip=http://192.168.200.200" application.properties

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1. But there's a problem with that , This modification is only temporary , It doesn't actually affect the real file . Actually sed There is one -i Parameters , Add this parameter to the real file , So under optimization

sed -i "/server_ip=/c server_ip=http://192.168.200.200" application.properties

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1. This command runs through the local area , The next step is to integrate into Jenkins Use this command in

• First, in the Jenkins in , Select parametric build , The parameter name I define is server_ip

• stay shell Use this variable in the script

notes : Jenkins The format of using the passed in variable is :${ Variable name }

#!/bin/bash

echo " Incoming ip yes :${server_ip}"

#  Modify the project according to the passed in parameters ip
cd /home/data/jenkins/workspace/maven_testng/maven_testng/src/main/resources
sed -i "/server_ip=/c server_ip=http://${server_ip}" application.properties
echo " The item has been changed to an incoming ip: ${server_ip}"

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Step on the pit : sed Use double quotation marks after the command , You can't use single quotes , Otherwise, the variable will be recognized as a normal string ！