How to find and replace string using groovy script - groovy

Question

I need to search some text from file and replace with other string using Groovy script. I am explaining my file below.
test.yml:
devices:
test-server:
type: test1
os: test
tacacs:
username: admin
passwords:
tacacs: admin
connections:
defaults:
class: unicon.Unicon
cli:
protocol: ssh
ip: 1.1.1.1
port: 2024
rest:
protocol: http
ip: 1.1.1.1
port: 8080
username: admin
password: admin
RFS1:
type: test
os: test
tacacs:
username: admin
passwords:
tacacs: admin
connections:
defaults:
class: unicon.Unicon
cli:
protocol: ssh
ip: 1.1.1.1
port: 2024
rest:
protocol: http
ip: 4.4.4.4
port: 8080
username: admin
password: admin
RFS2:
type: test
os: test
tacacs:
username: admin
passwords:
tacacs: admin
connections:
defaults:
class: unicon.Unicon
cli:
protocol: ssh
ip: 1.1.1.1
port: 2024
rest:
protocol: http
ip: 6.6.6.6
port: 8080
username: admin
password: admin
Here I need to search the IP which is under devices:/test-server:/connections:/cli:/ip: 1.1.1.1 with some new charcter like ip:10.10.10.10 using groovy script. I am using below code.
def myFile = new File("test.yml")
def fileText = myFile.text
fileText = (fileText =~ /ip:1.1.1.1/).replaceFirst("ip:10.10.10.10")
myFile.write(fileText)
Here my issue is its replacing the required string in whole file where ip:1.1.1.1 is present but I need to replace under devices:/test-server:/connections:/cli:/ip: 1.1.1.1. Please help me to resolve this issue.

Answer 1

A better way to do this is to simply do YAML parsing, manipulating the object, and saving back to the file.
Here's an example using Jackson:
#Grab(group='com.fasterxml.jackson.dataformat',
module='jackson-dataformat-yaml',
version='2.12.2')
def myFile = new File("test.yml")
def om = new com.fasterxml.jackson.databind.ObjectMapper(
new com.fasterxml.jackson.dataformat.yaml.YAMLFactory());
def value = om.readValue(myFile, Map)
value['devices']['test-server']['connections']['cli']['ip'] = '10.10.10.10'
That replaces the value in the in-memory object. You can then just save that back to a file, with something like:
om.writeValue(myFile, value)