How to declare global variable with pug/jade
<p>I am totally new in the jade/pug thing and I am now playing around and discovering this new technology. 
So far so good but somehow I do not know how do I define global variables to be use for all of my solution.</p>

<p>It kinda looks like this.</p>

<p>I have my mixins as below</p>

<pre><code>mixin headerSearch(projectName)
ul.navbar-search
    li
    a(href="#",class=projectName + "-menu-icon" + projectName + "-menubar-search", id="open-search-form")
        span.sr-only Search
        span.icon.icon-search


mixin headerNavigationIcons(navigationIconList,projectName)
ul.navbar-icons
    each navigationIcon in navigationIconList.length  ? navigationIconList : ["account","wishlist","carte"]
        li(class="menubar-"+ navigationIcon)
            a(href="#",class=projectName+"-hidden-text")
                span.heracles-hidden-text=navigationIcon
</code></pre>

<p>I would like to set the projectName variable to a global one so I can change it according to my projects.</p>

<p>How to do so? </p>

<p>Please help</p>