CODEWITHSUNDEEP
regexgroovy
marglet
marglet

Reputation: 21

How to remove everything after some character and Hyphen in regex?

I am trying to get some data from Annotations:

Annotations:            deployment.kubernetes.io/revision: 1
                        kubernetes.io/change-cause:
                          Branch=master-9eb8251 Message=Revert "ON-1796 Re-write the cart GET for edit cart (#1256)" (#1284)

                          This reverts commit 27e600f83ecd98923713e2996d0aeea0da2df8fa. Author=Gautam Prajapati Timestamp=2019-07-29T16:26:32.622777

I want to get the result as (only branch name):

master

I am using the following command:

System.out.println(/*"branch:" +*/ result.getMetadata().getAnnotations().get("kubernetes.io/change-cause").replaceAll("Message=.*[^/]*$", "").replaceAll("Branch=", "").replaceAll("-[^-]+$", ""));

I get the errors because this is compatible only with Java not Groovy.

Upvotes: 1

Views: 481

Answers (2)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626835

You may extract the value after Branch= using:

String s = 'Annotations: deployment.kubernetes.io/revision: 1 kubernetes.io/change-cause: Branch=master-9eb8251 Message=Revert "ON-1796 Re-write the cart GET for edit cart (#1256)" (#1284) This reverts commit 27e600f83ecd98923713e2996d0aeea0da2df8fa. Author=Gautam Prajapati Timestamp=2019-07-29T16:26:32.622777'
def m = (s =~ /Branch=(\S*?)(?:-[^\s-]*)?(?!\S)/ )
if (m) {
    print(m.group(1))
}

See the Groovy demo, output - master.

Also, see the regex demo. Details:

  • Branch= - literal string
  • (\S*?) - Group 1 (the required value): any 0 or more non-whitespace chars as few as possible, but followed with
  • (?:-[^\s-]*)? - an optional sequence of - and then 0+ chars other than whitespace and hyphen
  • (?!\S) - followed with a whitespace or end of string.

Upvotes: 1

A.Joly
A.Joly

Reputation: 2387

you can use this to remove version tag from your branch :

import java.util.regex.Pattern
import java.util.regex.Matcher
paragraph = 'Annotations:            deployment.kubernetes.io/revision: 1                        kubernetes.io/change-cause:                          Branch=master-9eb8251 Message=Revert "ON-1796 Re-write the cart GET for edit cart (#1256)" (#1284)                          This reverts commit 27e600f83ecd98923713e2996d0aeea0da2df8fa. Author=Gautam Prajapati Timestamp=2019-07-29T16:26:32.622777'

Pattern regex = ~ /Branch=\w*/
matcher = paragraph =~ regex

println matcher[0]

it will stop at '-', but your branch name can have digits or '_'. depending on your needs you can use \s or other options

result is Branch=master

If your branch name contains '-', you'll have to modify some things : first modify the regex 

Pattern regex = ~ /Branch=(\w*-\w*)*/

in the example change the branch name to Branch=master-TEST-test-9eb8251 then add some post processing on the resulting string :

myBranch = matcher[0][0] - matcher[0][0].split('-')[-1] // to remove the part after the last '-'
myBranch = myBranch.substring(0,myBranch.length() -1) // to remove the hyphen itself
println myBranch

you'll end up with Branch=master-TEST-test

Upvotes: 0

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