From 3ce19f871c6a03ae6e39076e220a09b21cddbbb3 Mon Sep 17 00:00:00 2001
From: Kevin MacMartin <prurigro@gmail.com>
Date: Wed, 1 Jun 2016 22:59:52 -0400
Subject: [PATCH] Implement cache busting for javascript and css assets

---
 .env.example                                |  2 ++
 init.sh                                     | 10 +++++++++-
 resources/views/layouts/dashboard.blade.php |  6 +++---
 resources/views/layouts/public.blade.php    |  8 ++++----
 4 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/.env.example b/.env.example
index e8ddc62..abf3cf1 100644
--- a/.env.example
+++ b/.env.example
@@ -6,6 +6,8 @@ APP_DEBUG=true
 APP_KEY=random_string
 APP_URL=http://localhost
 
+CACHE_BUST=
+
 LR_HOST=localhost
 
 DB_HOST=localhost
diff --git a/init.sh b/init.sh
index a5c8929..fdb0217 100755
--- a/init.sh
+++ b/init.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 # dependencies
-deps=('bower' 'composer' 'gulp' 'npm' 'php')
+deps=('bower' 'composer' 'egrep' 'gulp' 'npm' 'php' 'sed')
 
 # Colour scheme
 [[ -t 1 ]] && {
@@ -59,6 +59,14 @@ trap 'error "script killed"' SIGINT SIGQUIT
 msg "Running: ${c_m}composer installl --no-dev"
 composer install --no-interaction --no-dev || error "${c_m}composer install --no-interaction --no-dev$c_w exited with an error status"
 
+egrep -q '^CACHE_BUST=' .env || {
+    msg "Adding the ${c_y}CACHE_BUST$c_w variable"
+    printf '\n%s\n' 'CACHE_BUST=' >> .env
+}
+
+msg "Updating ${c_y}CACHE_BUST$c_w variable"
+sed -i 's|^CACHE_BUST=.*|CACHE_BUST='"$(</dev/urandom tr -dc A-Za-z0-9 | head -c"${1:-32}")"'|' .env
+
 msg "Running: ${c_m}php artisan migrate"
 php artisan migrate || error "${c_m}php artisan migrate$c_w exited with an error status"
 
diff --git a/resources/views/layouts/dashboard.blade.php b/resources/views/layouts/dashboard.blade.php
index 96e3496..93d9d6e 100644
--- a/resources/views/layouts/dashboard.blade.php
+++ b/resources/views/layouts/dashboard.blade.php
@@ -1,9 +1,9 @@
 @extends('layouts.base')
 
 @section('page-includes')
-    <script src="/js/lib-dashboard.js"></script>
-    <script src="/js/dashboard.js"></script>
-    <link rel="stylesheet" href="/css/dashboard.css" />
+    <script src="/js/lib-dashboard.js?version={{ env('CACHE_BUST') }}"></script>
+    <script src="/js/dashboard.js?version={{ env('CACHE_BUST') }}"></script>
+    <link rel="stylesheet" href="/css/dashboard.css?version={{ env('CACHE_BUST') }}" />
 @endsection
 
 @section('page-top')
diff --git a/resources/views/layouts/public.blade.php b/resources/views/layouts/public.blade.php
index c5886c4..22243e5 100644
--- a/resources/views/layouts/public.blade.php
+++ b/resources/views/layouts/public.blade.php
@@ -1,10 +1,10 @@
 @extends('layouts.base')
 
 @section('page-includes')
-    <script src="/js/modernizr.js"></script>
-    <script src="/js/lib.js"></script>
-    <script src="/js/app.js"></script>
-    <link rel="stylesheet" href="/css/app.css" />
+    <script src="/js/modernizr.js?version={{ env('CACHE_BUST') }}"></script>
+    <script src="/js/lib.js?version={{ env('CACHE_BUST') }}"></script>
+    <script src="/js/app.js?version={{ env('CACHE_BUST') }}"></script>
+    <link rel="stylesheet" href="/css/app.css?version={{ env('CACHE_BUST') }}" />
 @endsection
 
 @section('page-top')