Merge pull request #2 from Lullabot/post-checkout-hook

Add a post-checkout hook.

Author: deviantintegral

README.md

@@ -26,6 +26,19 @@ The easiest way to get going is to use https://github.com/Lullabot/trusty32-lamp
 which includes these commands. Otherwise, these scripts expect a
 thinly-provisioned LVM volume named "master" in a "mysql" volume group.
 
+LMM supports the following hooks in `/etc/lmm`. Each hook must be an executable
+file.
+
+* `post-checkout`
+
+An example `post-checkout` hook to clear memcache when switching databases:
+
+```sh
+#!/bin/bash
+
+echo 'flush_all' | nc 127.0.0.1 11211
+```
+
 Examples
 --------
 

functions.sh

@@ -111,5 +111,9 @@ checkout() {
   echo "Setting $VG_PATH/$1 as the active database."
   rm /var/lib/mysql
   ln -s $VG_PATH/$1 /var/lib/mysql
+  if [[ -x "/etc/lmm/post-checkout" ]]
+  then
+    /etc/lmm/post-checkout
+  fi
   service mysql start
 }