Heroku Buildpack for N|Solid

This is the official Heroku buildpack for N|Solid apps.

The buildpack is based on the Heroku buildpack for Node.js.

For more information on the N|Solid product from NodeSource, visit the N|Solid documentation site.

Documentation

To use this buildpack with your Node.js application, run the following command:

heroku buildpacks:set https://github.com/nodesource/heroku-buildpack-nsolid -a my-app-name

Since this buildpack is based on the Heroku buildpack for Node.js, most of the documentation for that buildpack applies to this one. For more information about using the Node.js buildpack on Heroku, see these Heroku Dev Center articles:

• Heroku Node.js Support
• Getting Started with Node.js on Heroku

For more general information about buildpacks on Heroku:

• Buildpacks
• Buildpack API

Differences from the Heroku buildpack for Node.js

The primary difference between this buildpack and the Heroku buildpack for Node.js, is that this buildpack will install N|Solid runtimes instead of Node.js runtimes.

The most current version of N|Solid runtimes is always selected, and the LTS version (eg, 4.x, 6.x, 8.x) can be selected by setting the engines.node property as described in the Heroku docs for specifying a Node.js version. To select a particular LTS version, the engines.node property should be a string that starts with the specific version. For example, the following property values all select the LTS 4.x version of N|Solid:

• 4
• 4.x
• 4.8.4

If the first characters of the engines.node property do not match an existing LTS version available, or if engines.node not specified at all, the most recent supported LTS version will be selected. For example, if LTS 4 and 6 versions are available, version 6 will be used unless the engines.node property is to a string that starts with 4.

Locking to a buildpack version

In production, you frequently want to lock all of your dependencies - including buildpacks - to a specific version. That way, you can regularly update and test them, upgrading with confidence.

First, find the version you want from the list of buildpack tags which include nsolid in the tag name. Then, specify that version with buildpacks:set:

heroku buildpacks:set https://github.com/nodesource/heroku-buildpack-nsolid#v111-nsolid-1 -a my-app-name

If you have trouble upgrading to the latest version of the buildpack, please open an issue in the GitHub repo so we can assist.

Chain Node with multiple buildpacks

This buildpack automatically exports node, npm, and any node_modules binaries into the $PATH for easy use in subsequent buildpacks.

Changes made to the Heroku Buildpack for Node.js files

The following files have been changed from the Heroku Buildpack for Node.js, for this buildpack:

• bin/compile - calls lib/nsolid.sh to replace the install_bins function so that an N|Solid runtime is installed instead of Node.js
• lib/nsolid.sh - implements a new install_bins function to install the N|Solid runtime
• test/run - commented out some tests not applicable to this buildpack, and changed a few expectations of runtime versions installed
• test/utils - removed messages from graceful-fs in stderr

Feedback

Having trouble? Dig it? Feature request?

• GitHub issues

Hacking

To make changes to this buildpack, fork it on GitHub. Push up changes to your fork, then create a new Heroku app to test it, or configure an existing app to use your buildpack:

# Create a new Heroku app that uses your buildpack
heroku create --buildpack <your-github-url>

# Configure an existing Heroku app to use your buildpack
heroku buildpacks:set <your-github-url>

# You can also use a git branch!
heroku buildpacks:set <your-github-url>#your-branch

Tests

The buildpack tests use Docker to simulate Heroku's Cedar-14 and Heroku-16 containers.

To run the test suite:

make test

Or to just test in cedar or cedar-14:

make test-cedar-14
make test-heroku-16

The tests are run via the vendored shunit2 test framework.