Remove unrar installation for Linux

Unrar seems to only play nice when certain files are in very specific
locations. Unfortunately these locations are owned by root. A fix could
be put together using sudo, but it makes more sense to install from apt
if sudo has to be used anyway. For now the README notes the unrar requirement
for Linux platforms.

README.rst

@@ -12,7 +12,8 @@ Requirements
 ============
 
 * VirtualBox (http://virtualbox.org)
-* Curl (Ubuntu: ``apt-get install curl``)
+* Curl (Ubuntu: ``sudo apt-get install curl``)
+* Linux Only: unrar (Ubuntu: ``sudo apt-get install unrar``)
 * Patience
 
 

ievms.sh

@@ -55,11 +55,15 @@ check_virtualbox() {
     fi
 }
 
-download_unrar() {
+install_unrar() {
     case $kernel in
-        Darwin) url="http://www.rarlab.com/rar/rarosx-4.0.1.tar.gz" ;;
-        Linux) url="http://www.rarlab.com/rar/rarlinux-4.0.1.tar.gz" ;;
+        Darwin) download_unrar ;;
+        Linux) fail "Linux support requires unrar (sudo apt-get install for Ubuntu/Debian)" ;;
     esac
+}
+
+download_unrar() {
+    url="http://www.rarlab.com/rar/rarosx-4.0.1.tar.gz"
     archive="rar.tar.gz"
 
     log "Downloading unrar from ${url} to ${ievms_home}/${archive}"
@@ -79,7 +83,7 @@ download_unrar() {
 
 check_unrar() {
     PATH="${PATH}:${ievms_home}/rar"
-    hash unrar 2>&- || download_unrar
+    hash unrar 2>&- || install_unrar
 }
 
 build_ievm() {
@@ -176,4 +180,4 @@ do
     build_ievm $ver
 done
 
-log "Done!"
+log "Done!"