Magento EE Customer Attributes Install-script

config.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Project_Customer>
            <version>0.1.0</version>
        </Project_Customer>
    </modules>
    <global>
        <helpers>
            <project_customer>
                <class>Project_Customer_Helper</class>
            </project_customer>
        </helpers>
        <resources>
            <project_customer_setup>
                <setup>
                    <module>Project_Customer</module>
                    <class>Mage_Eav_Model_Entity_Setup</class>
                </setup>
                <connection>
                    <use>core_setup</use>
                </connection>
            </project_customer_setup>
            <project_customer_setup>
                <connection>
                    <use>core_write</use>
                </connection>
            </project_customer_setup>
            <project_customer_setup>
                <connection>
                    <use>core_read</use>
                </connection>
            </project_customer_setup>
        </resources>
    </global>
</config>

data-install.php

<?php

/* @var Mage_Eav_Model_Entity_Setup $oInstaller */
$oInstaller = $this;

/** @var project_Customer_Helper_Install $oAttributeInstallHelper */
$oAttributeInstallHelper = Mage::helper('project_customer/install');

$oInstaller->startSetup();

// adding some new attributes
$aNewCustomerAttributeData = array(
    'new_customer_field' => array(
        'entity' => 'customer',
        'data'  => array(
            'type'     => 'varchar',
            'backend'  => '',
            'label'    => 'Function',
            'input'    => 'text',
            'global'   => 1,
            'source'   => '',
            'visible'  => true,
            'required' => true,
            'default'  => '',
            'frontend' => '',
            'unique'   => false,
            'note'     => 'Custom Attribute'
        ),
        'advanced' => array(
            'is_used_for_customer_segment' => true,
            'is_system'                    => 0,
            'is_user_defined'              => 1,
            'is_visible'                   => 1,
            'sort_order'                   => 100,
            'used_in_forms'                => array(
                'checkout_register',
                'customer_account_create',
                'customer_account_edit',
                'adminhtml_customer',
                'adminhtml_checkout'
            )
        )
    ),
);

foreach ($aNewCustomerAttributeData as $sIdentifier => $aData) {
    $oInstaller->addAttribute($aData['entity'], $sIdentifier, $aData['data']);

    $oAttributeInstallHelper->addNewAttributeToGroup($aData['entity'], $sIdentifier, $aData['advanced']['sort_order']);
    $oAttributeInstallHelper->saveCustomerAttributeData($sIdentifier, $aData['advanced'], $aData['entity']);
}

// Update some existing attributes
$aUpdateCustomerAttributeData = array(
    'taxvat' => array(
        'entity' => 'customer',
        'data'  => array(
            'is_visible' => true,
            'is_required'   => true,
        )
    ),
    'company' => array(
        'entity' => 'customer_address',
        'data'  => array(
            'is_required' => true
        )
    )
);

foreach ($aUpdateCustomerAttributeData as $sIdentifier => $aData) {
    $oAttributeInstallHelper->saveCustomerAttributeData($sIdentifier, $aData['data'], $aData['entity']);
}

$oInstaller->endSetup();

InstallHelper.php

<?php

class Project_Customer_Helper_Install extends Mage_Core_Helper_Abstract
{
    /**
     * @param string $sEntityIdentifier
     * @param string $sAttributeIdentifier
     * @param string $sSortOrder
     * @throws Mage_Core_Exception
     */
    public function addNewAttributeToGroup ($sEntityIdentifier, $sAttributeIdentifier, $sSortOrder)
    {
        /** @var Mage_Eav_Model_Entity_Setup $oSetup */
        $oSetup = new Mage_Eav_Model_Entity_Setup('core_setup');

        $iEntityTypeId     = $oSetup->getEntityTypeId($sEntityIdentifier);
        $iAttributeSetId   = $oSetup->getDefaultAttributeSetId($iEntityTypeId);
        $iAttributeGroupId = $oSetup->getDefaultAttributeGroupId($iEntityTypeId, $iAttributeSetId);

        $oSetup->addAttributeToGroup(
            $iEntityTypeId,
            $iAttributeSetId,
            $iAttributeGroupId,
            $sAttributeIdentifier,
            $sSortOrder
        );
    }

    /**
     * @param string $sAttributeIdentifier
     * @param array<string|array<string>> $aAdvancedAttributeData
     * @param string $sEntityIdentifier
     */
    public function saveCustomerAttributeData ($sAttributeIdentifier, $aAdvancedAttributeData, $sEntityIdentifier)
    {
        $oAttribute = Mage::getSingleton("eav/config")->getAttribute($sEntityIdentifier, $sAttributeIdentifier);
        $oAttribute->addData($aAdvancedAttributeData);
        
        $oAttribute->save();
    }
}