Jenkins and Groovy and Regex

groovyJenkins

I am very new to using groovy. Especially when it comes to Jenkins+Groovy+Pipelines.

I have a string variable that can change from time to time and want to apply a regex to accomodate the 2 or 3 possible results the string may return.

In my groovy code I have:

r = "Some text that will always end in either running, stopped, starting." def regex = ~/(.*)running(.*)/ assert regex.matches(r)

But I receive an error in the jenkins output:

hudson.remoting.ProxyException: groovy.lang.MissingMethodException: No signature of method: java.util.regex.Pattern.matches() is applicable for argument types: (java.lang.String)

UPDATE:
I was able to create a pretty nifty jenking groovy while loop in a pipeline job i am creating to wait for a remote process using the regex info here and a tip in a different post (do .. while() in Groovy with inputStream?).

            while({
                def r = sh returnStdout: true, script: 'ssh "Insert your remote ssh command that returns text'
                println "Process still running.  Waiting on Stop"
                println "Status returned: $r"
                r =~ /running|starting|partial/
            }());

Best Answer

Straight-forward would be:

String r = "Some text that will always end in either running, stopped, starting."
assert r =~ /(.*)running(.*)/

Related Solutions

Converting a string to int in Groovy

Use the toInteger() method to convert a String to an Integer, e.g.

int value = "99".toInteger()

An alternative, which avoids using a deprecated method (see below) is

int value = "66" as Integer

If you need to check whether the String can be converted before performing the conversion, use

String number = "66"

if (number.isInteger()) {
  int value = number as Integer
}

Deprecation Update

In recent versions of Groovy one of the toInteger() methods has been deprecated. The following is taken from org.codehaus.groovy.runtime.StringGroovyMethods in Groovy 2.4.4

/**
 * Parse a CharSequence into an Integer
 *
 * @param self a CharSequence
 * @return an Integer
 * @since 1.8.2
 */
public static Integer toInteger(CharSequence self) {
    return Integer.valueOf(self.toString().trim());
}

/**
 * @deprecated Use the CharSequence version
 * @see #toInteger(CharSequence)
 */
@Deprecated
public static Integer toInteger(String self) {
    return toInteger((CharSequence) self);
}

You can force the non-deprecated version of the method to be called using something awful like:

int num = ((CharSequence) "66").toInteger()

Personally, I much prefer:

int num = 66 as Integer

Jenkins – How to restart Jenkins manually

To restart Jenkins manually, you can use either of the following commands (by entering their URL in a browser):

(jenkins_url)/safeRestart - Allows all running jobs to complete. New jobs will remain in the queue to run after the restart is complete.

(jenkins_url)/restart - Forces a restart without waiting for builds to complete.

Related Topic