Check if running with --stacktrace

In a custom plugin I need to check if gradle is run with --stacktrace. I have tried the following:

testLogging {
        if ( project.hasProperty("--stacktrace") ) {
          println
"POSITIVE";
        } else {
          println
"NEGATIVE";
        }
      }

and I run it with:

gradle clean install --stacktrace

but it prints: NEGATIVE. How do I add a check for build-in commandline options?

You’d check ‘project.gradle.startParameter’, which is of type org.gradle.StartParameter.

I just stumbled on this as well. It turns out that

if (project.gradle.startParameter.showStacktrace) {
          println
"POSITIVE";
        } else {
          println
"NEGATIVE";
        }
}

also always displays “NEGATIVE”. Here’s what worked for me:

import org.gradle.logging.ShowStacktrace
  if (project.gradle.startParameter.showStacktrace != ShowStacktrace.INTERNAL_EXCEPTIONS) {
          println
"POSITIVE";
        } else {
          println
"NEGATIVE";
        }
}

ShowStacktrace is an enum with three possible values:

INTERNAL_EXCEPTIONS := no stacktrace parameters
ALWAYS
:= "--stacktrace"
ALWAYS_FULL := "--full-stacktrace".