Jade Includes conditionals to check the actual page

Is there a way to check which page are you in Jade and include something (a partial page or a specific CSS Style) based in that page? For example:

If I am in homepage, then include just the HOMEPAGE-head.jade

Else - include the NORMAL-head.jade

Here is an in context example:

doctype html
html
  body
    if HOMEPAGE
      include ./includes/HOMEPAGE-head.jade
    else
      include ./includes/NORMAL-head.jade

    h1 My Site
    p Welcome to my super lame site.
    include ./includes/foot.jade

Thank you!

Solution

There are two approaches I know of.

Option A: 2 layouts and extends

Make two layouts: layout.jade and layout-homepage.jade, changing the include line accordingly. Most of your pages will extends layout, but index.jade will extends layout-homepage.

Option B: variables block

in layout.jade:

- var HOMEPAGE = false;
block variables
doctype html
html
  body
    if HOMEPAGE
      include ./includes/HOMEPAGE-head.jade
    else
      include ./includes/NORMAL-head.jade

    h1 My Site
    p Welcome to my super lame site.
    include ./includes/foot.jade

Then in index.jade:

block variables
  - HOMEPAGE = true;
h1 This is your home page template...

All the rest of your pages will default to HOMEPAGE = false so they don't need any changes to make this approach work.