Question

From layout, how can I set crumbInfo/link is Mage::getBaseUrl() for breadcrumbs?

<layout version="0.1.0">
    <contacts_index_index translate="label">
        <reference name="breadcrumbs">
            <action method="addCrumb">
                <crumbName>Accueil</crumbName>
                <crumbInfo>
                    <label>Accueil</label>
                    <title>Accueil</title>
                    <link>/</link><!--How can I set Mage::getBaseUrl() here-->
                </crumbInfo>
            </action>
            <action method="addCrumb">
                <crumbName>Contactez-nous</crumbName>
                <crumbInfo>
                    <label>Contactez-nous</label>
                    <title>Contactez-nous</title>
                </crumbInfo>
            </action>
        </reference>
    </contacts_index_index>
</layout>

Answer 1

For argument nodes in layout XML, you can specify a helper and method; the return value of the method will be passed as the argument.

In your xml above, you can pass <link helper="class_group/classname/method" /> and create a helper to return the URL value that you like.