Jenkins groovy regex match string : Error: java.io.NotSerializableException: java.util.regex.Matcher

pogorman :

I'm trying to get the matched string from a regex in groovy. The matched string prints to the console without problems, but when I try use the matched string in a git command I get the following error:

Err: Incremental Build failed with Error: java.io.NotSerializableException: java.util.regex.Matcher

Here is the code:

                def binaryName = "298_application_V2_00_Build_07.hex"

                def matches = (binaryName =~ /(V)(\d+)(_)(\d+)(_)(Build)(_)(\d+)/)
                versionTag = ""+matches[0].getAt(0)                 
                echo "${matches}"
                echo "$versionTag"
                bat("git tag $versionTag")
                bat("git push origin --tags")

How can I get the matched string from the regex?

StephenKing :

This problem is caused by Jenkins' CPS, which serializes all pipeline executions to store as resumable state.

Calls to non-serializable methods have to be wrapped in a method annotated with @NonCPS:

@NonCPS
String getVersion(String binaryName) {
  def matches = (binaryName =~ /(V)(\d+)(_)(\d+)(_)(Build)(_)(\d+)/)
  versionTag = ""+matches[0].getAt(0)
  versionTag
}

this method can now be called from your pipeline. In case your Jenkins master restarts during execution of this method, it would just run through it completely - which is in many cases, such as yours, absolutely no problem.

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