ConvertHiddenFieldsToRegular.groovy

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.fields.layout.field.FieldLayoutManager
import org.ofbiz.core.entity.DelegatorInterface
import org.ofbiz.core.entity.EntityExpr
import org.ofbiz.core.entity.EntityOperator

def delegatorInterface = ComponentAccessor.getComponent(DelegatorInterface)
def customFieldManager = ComponentAccessor.customFieldManager
def fieldLayoutManager = ComponentAccessor.getComponent(FieldLayoutManager)

def replacementFieldTypes = [
    'com.onresolve.jira.groovy.groovyrunner:hideable-textfield': 'com.atlassian.jira.plugin.system.customfieldtypes:textfield',
    'com.onresolve.jira.groovy.groovyrunner:hideable-textarea' : 'com.atlassian.jira.plugin.system.customfieldtypes:textarea',
]

delegatorInterface.findByOr('CustomField', replacementFieldTypes.keySet().collect {
    new EntityExpr('customfieldtypekey', EntityOperator.EQUALS, it)
}).each {
    def replacementType = replacementFieldTypes[it.getString('customfieldtypekey')]
    log.warn ("Converting '${it.getString('name')}' to $replacementType.")
    it.put('customfieldtypekey', replacementType)
    delegatorInterface.store(it, true)
}

fieldLayoutManager.refresh()
customFieldManager.clear()

"Fields converted"