refactor(tracking): conditional pug include instead of injection (#96)

bin/vendor/deploy.sh

@@ -1,13 +0,0 @@
-#!/bin/bash
-set -e
-
-analytics_file="../bin/vendor/analytics.html"
-layout_file="$(dirname $0)/../../views/layout.pug"
-
-# Replace analytics script in layout
-distro=`uname`
-if [[ $distro != 'Linux' ]]; then
-  sed -i '' 's,'"<!--ANALYTICS-->,include $analytics_file"',g' "$layout_file"
-else  # If running on macOS, the sed command has different syntax
-  sed -i 's,'"<!--ANALYTICS-->,include $analytics_file"',g' "$layout_file"
-fi

views/layout.pug

@@ -194,4 +194,5 @@ section.modal#about-this-modal
 
   script(src='/scripts/index.js')
 
-    <!--ANALYTICS-->
+  if process.env.TRACKING
+    include ./tracking.pug

views/tracking.pug

@@ -1,15 +1,11 @@
-<!-- Google Analytics -->
-<script async src="https://www.googletagmanager.com/gtag/js?id=UA-109296848-1"></script>
-<script>
+script(async src="https://www.googletagmanager.com/gtag/js?id=UA-109296848-1")
+script.
   window.dataLayer = window.dataLayer || [];
   function gtag(){dataLayer.push(arguments);}
   gtag('js', new Date());
 
   gtag('config', 'UA-40725207-13');
-</script>
-<!-- Google Analytics end -->
-<!-- Snowplow starts plowing -->
-<script async>
+script(async).
   ;(function(p,l,o,w,i,n,g){if(!p[i]){p.GlobalSnowplowNamespace=p.GlobalSnowplowNamespace||[];
   p.GlobalSnowplowNamespace.push(i);p[i]=function(){(p[i].q=p[i].q||[]).push(arguments)
   };p[i].q=p[i].q||[];n=l.createElement(o);g=l.getElementsByTagName(o)[0];n.async=1;
@@ -42,5 +38,3 @@
       app_framework: 'nodejs'
     }
   });
-</script>
-<!-- Snowplow stops plowing -->