Create a global directory for node modules installed with npm

src/freedombone-utils-nodejs

@@ -173,6 +173,8 @@ EOF
     fi
     rm "$rootdir/usr/bin/test_nodejs_install"
     NODE_UPGRADE=
+
+    nodejs_setup_global_modules
 }
 
 function nodejs_upgrade {
@@ -201,6 +203,21 @@ function nodejs_upgrade {
     npm update -g
 }
 
+function nodejs_setup_global_modules {
+    if [ ! -d /root/.npm-global ]; then
+        mkdir /root/.npm-global
+    fi
+    npm config set prefix '/root/.npm-global'
+    export PATH=/root/.npm-global/bin:$PATH
+    if ! grep -q "PATH=/root/.npm-global/bin" /root/.bashrc; then
+        echo "PATH=/root/.npm-global/bin:\$PATH" >> /root/.bashrc
+    fi
+    if ! grep -q "NPM_CONFIG_PREFIX=" /root/.bashrc; then
+        echo "export NPM_CONFIG_PREFIX=/root/.npm-global" >> /root/.bashrc
+    fi
+    export NPM_CONFIG_PREFIX=/root/.npm-global
+}
+
 function remove_nodejs {
     if [ ! "$1" ]; then
         return