Add retries, to make it fail-safe against network interruptions

nvm.sh

@@ -2684,10 +2684,38 @@ nvm() {
 
       # Install version if not available
       if ! nvm ls "$PROVIDED_VERSION" &>/dev/null; then
-        nvm install "$PROVIDED_VERSION"
+        tries_global=3
+        installed_flag="/tmp/.nvm_success"
+
+        while [ $tries_global -gt 0 ]; do
+          ( nvm install "$PROVIDED_VERSION" && touch $installed_flag ) &
+          proc_id="$!"
+          #wait $proc_id
+          #result=$?
+
+          # Check every 2 seconds if the installation finished,
+          # if it did, install the needed npm packages and exit
+          tries_install=10
+          while [ $tries_install -gt 0 ]; do
+            if [ -f $installed_flag ]; then
               npm install -g grunt-cli bower
+
+              rm $installed_flag &>/dev/null
               return
             fi
+            sleep 2
+            tries_install=$(( $tries_install - 1 ))
+          done
+
+          # Kill process after 20 seconds
+          kill $proc_id &>/dev/null
+
+          tries_global=$(( $tries_global - 1 ))
+        done
+
+        echo "Cannot install and use $PROVIDED_VERSION - network/disk space issues might be the reason."
+        return 1
+      fi
 
       if [ "_$VERSION" = '_system' ]; then
         if nvm_has_system_node && nvm deactivate >/dev/null 2>&1; then