replaced fatalExit function for 'inline' exit

exit on errors (set -e)
simplified if for NVM_DIR and NVM_SOURCE, corrected indentation

install-gitless.sh

@@ -1,15 +1,16 @@
 #!/bin/bash
 
+set -e
+
 fatalExit (){
   echo "$@" && exit 1;
 }
 
-# an alternative URL that could be used: https://github.com/creationix/nvm/tarball/master
-if [ "$NVM_SOURCE" = "" ]; then
+if [ ! "$NVM_SOURCE" ]; then
   NVM_SOURCE="https://raw.github.com/creationix/nvm/master/nvm.sh"
 fi
 
-if [ "$NVM_DIR" = "" ]; then
+if [ ! "$NVM_DIR" ]; then
   NVM_DIR="$HOME/.nvm"
 fi
 
@@ -20,9 +21,9 @@ echo -ne "=> Downloading... "
 
 # Detect if curl or wget is installed to download NVM_SOURCE
 if type curl > /dev/null 2>&1; then
-  curl --silent "$NVM_SOURCE" -o nvm.sh || fatalExit "Failed";
+  curl --silent "$NVM_SOURCE" -o nvm.sh || fatalExit "Failed downloading $NVM_SOURCE";
 elif type wget > /dev/null 2>&1; then 
-  wget --quiet "$NVM_SOURCE" -O nvm.sh || fatalExit "Failed";
+  wget --quiet "$NVM_SOURCE" -O nvm.sh || fatalExit "Failed downloading $NVM_SOURCE";
 else
   fatalExit "Must have curl or wget to install nvm";
 fi

install.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -e
+
 NVM_DIR="$HOME/.nvm"
 
 if ! hash git 2>/dev/null; then