hi.groovy

// vim: set fenc=utf-8 ts=2 sts=2 sw=2 :
import jenkins.model.Jenkins
import groovy.json.JsonBuilder

def jenkins = Jenkins.instance
def ret = [:]
jenkins.items.each {item ->
  def list = []
  item.builds.each {build ->
    list.add(
      number: build.number,
      duration: build.duration,
      timestamp: build.timestamp.timeInMillis
    )
  }
  ret.put item.displayName, list
}

print new JsonBuilder(ret).toString()

return

• Jenkins Script Console - Jenkins - Jenkins Wiki
• Overview (Jenkins main module 1.555 API)

% curl -d "script=$(cat hi.groovy)" http://localhost:8080/scriptText