[dev_setup] Cache Redis tarballs

Test plan: run dev_setup with a cached tarball, without one, and with
a corrupt tarball.
  And to pass BVTs, without doubt.

Change-Id: Iefd2172c8966cef08838e70e6207dbb6c39a4fd2

dev_setup/cookbooks/redis/attributes/default.rb

@@ -5,6 +5,8 @@ default[:redis][:runner] = node[:deployment][:user]
 default[:redis][:port] = 6379
 default[:redis][:password] = "redis"
 
+default[:redis][:checksum] = "6d612b28137c926fb6b668fd85d25862469f9755af4e15f1b37cbe6f88882b32"
+
 default[:redis_node][:capacity] = "200"
 default[:redis_node][:index] = "0"
 default[:redis_node][:max_memory] = "16"

dev_setup/cookbooks/redis/recipes/default.rb

@@ -1,7 +1,7 @@
-remote_file File.join("", "tmp", "redis-#{node[:redis][:version]}.tar.gz") do
+remote_file File.join(node[:deployment][:setup_cache], "redis-#{node[:redis][:version]}.tar.gz") do
   owner node[:deployment][:user]
   source "http://redis.googlecode.com/files/redis-#{node[:redis][:version]}.tar.gz"
-  not_if { ::File.exists?(File.join("", "tmp", "redis-#{node[:redis][:version]}.tar.gz")) }
+  checksum node[:redis][:checksum]
 end
 
 directory "#{node[:redis][:path]}" do
@@ -24,7 +24,7 @@ bash "Install Redis" do
   cwd File.join("", "tmp")
   user node[:deployment][:user]
   code <<-EOH
-  tar xzf redis-#{node[:redis][:version]}.tar.gz
+  tar xzf #{File.join(node[:deployment][:setup_cache], "redis-#{node[:redis][:version]}.tar.gz")}
   cd redis-#{node[:redis][:version]}
   make
   cd src