Upgrading images to be used with CircleCI

 * Ignore timeout status of nc command

.circleci/config.yml

@@ -7,11 +7,11 @@ jobs:
   build:
     docker:
       # specify the version you desire here
-       - image: circleci/ruby:2.4.1-node-browsers
+       - image: circleci/ruby:2.6.2-node-browsers-legacy
          environment: 
             TEST_DRB: false
 
-       - image: memcached:1.4-alpine
+       - image: memcached:latest
 
     working_directory: ~/repo
 
@@ -50,6 +50,6 @@ jobs:
             if [[ -p /dev/stdout ]]; then echo "this is a PIPE!"; else echo "this is NOT a pipe"; fi
             if [[ ! -t 1 && ! -p /dev/stdout ]]; then echo "this is a REDIRECT!"; else echo "this is NOT a redirect"; fi
             echo "Flushing MemCached...."
-            echo flush_all | nc -G 4 127.0.0.1 11211
+            echo flush_all | timeout -k 2 -s HUP 10 nc -G 4 127.0.0.1 11211 || true
             timeout -k 2 -s HUP 30 bundle exec rspec --order random --backtrace
 

README.md

@@ -487,7 +487,12 @@ The above example will take an unencrypted key passed in `$mykey`, ask for a pas
 
 Nobody likes to re-type passwords over and over again, and for this reason *Sym* supports password caching via a locally running `memcached` instance (using the default port 11211, if available).
 
-Specifics of configuring both Cache Providers is left to the `Configuration` class, an example of which is shown below in the Ruby API section.
+*Multiple Providers*
+
+Cache is written using the Provider design pattern (a.k.a. plugin architecture), and so it's easy to add a new Cache Provider that uses a custom backend. The supplied production-ready provider only works with a `memcached` daemon running (ideally) locally.
+
+
+For customization of memcached location, we refer you to the `Configuration` class for an example of how to configure MemCached provider — shown below in the Ruby API section.
 
 In order to control password caching, the following flags are available:
 

lib/sym/constants.rb

@@ -37,7 +37,7 @@ module Log
     end
 
     ENV_ARGS_VARIABLE_NAME = 'SYM_ARGS'.freeze
-    SYM_KEY_FILE           = "#{ENV['HOME']}/.sym.key"
+    SYM_KEY_FILE           = "#{Dir.home}/.sym.key".freeze
 
   end
 end