Alexskc Alexskc - 1 year ago 154
Node.js Question

Installing node modules in Openshift Python gear

I have a Python application in Openshift, with Python 3.3 and PostgreSQL cartridges. The Python cartridge is running Django 1.8, based off the template on the Website.

Recently, I started using Gulp to automate my build, and while it's worked great on my local machine, I can't figure out what to do to use it in Openshift. I have django-gulp installed so it just runs whenever I use

, but the Openshift server obviously doesn't have gulp or any plugins installed, so that won't do anything. I don't know how to install them on the server, though.

Including a
does nothing. I've tested it and it works fine if I go with a node cartridge, but I've got a Python one.

Since npm is on the server, I tried SSHing and running
npm install
manually, but it threw up a permission denied error.

Answer Source

So, after trying to work this out for a while, I've finally figured out a solution. This is a bit convoluted, but it does work:

  1. Install your own Node and npm. The version included in Openshift is hopelessly outdated and doesn't really work. SSH into your server and install a local version in your dependencies folder. cd $OPENSHIFT_HOMEDIR/app_root/dependencies; wget; tar xf node-v6.3.0-linux-x64.tar.xz; rm node-v6.3.0-linux-x64.tar.xz Install the dev version. DO NOT install the stable version as that'll burn through your inodes like nothing else.
  2. Change your PATH to include the the new node version export PATH="$OPENSHIFT_HOMEDIR/app_root/dependencies/node_modules/.bin/:$OPENSHIFT_HOMEDIR/app_root/dependencies/node/bin/:$PATH" Environment variables get reset whenever you disconnect from the server. You can change them permanently with rhc env set, but as this is only used before deployment, I recommend sticking this in the /.openshift/action_hooks/pre_build.
  3. You also need to change the NPM_CONFIG_USERCONFIG variable. export NPM_CONFIG_USERCONFIG=$OPENSHIFT_HOMEDIR/app-root/build-dependencies/.npmrc. Once again, I recommend doing this in the pre_build hook.
  4. At this point, you can change the cache without getting a permission denied error. npm config set cache "$OPENSHIFT_HOMEDIR/app_root/dependencies/.npm
  5. You can now finally use npm install! Install the packages you need. Use the --prefix flag to install to the node_modules folder.
  6. However, to use gulp, you need to have a gulp module installed in the place you're calling from, so npm install gulp WITHOUT the prefix flag.
  7. You can now call gulp! However, your gulpfile will not not find the modules unless you edit your gulpfile to link to the dependencies folder you have set up. So instead of require('gulp-cssnano'), you'd have require([OPENSHIFT_HOMEDIR]/app_root/dependencies/node_modules/gulp-cssnano). I keep a separate gulpfile for Openshift to maintain my sanity.
  8. Call gulp with your new gulpfile in pre_build.
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