heroku-buildpack-elixir
A Heroku buildpack for deploying Elixir applications with prebuilt binaries, caching, and flexible configuration.
What is heroku-buildpack-elixir?
Heroku Buildpack for Elixir is a deployment tool that automates the process of building and running Elixir applications on Heroku. It handles Elixir and Erlang version management, dependency caching, and compilation, reducing the complexity of deploying Elixir apps to Heroku. It solves the problem of manual configuration and slow builds by providing prebuilt binaries and efficient caching.
Elixir developers who deploy applications on Heroku and want a reliable, configurable build process. It's also useful for teams needing consistent deployment pipelines for Elixir projects.
Developers choose this buildpack for its robust feature set, including prebuilt binaries, caching, and flexible hooks, which streamline deployments. It's a community-tested solution that reduces setup time and ensures compatibility with Heroku's platform.
Overview
Heroku Buildpack for Elixir with nitro boost
Use Cases
Best For
- Deploying Elixir Phoenix applications to Heroku
- Managing Elixir and Erlang version compatibility in deployments
- Speeding up Heroku builds with dependency caching
- Customizing build steps with pre- and post-compilation hooks
- Building Elixir releases for production deployments on Heroku
- Ensuring protocol consolidation for performance in production
Not Ideal For
- Teams deploying Elixir applications to platforms other than Heroku, such as AWS ECS or Kubernetes
- Projects adopting Cloud Native Buildpack standards, as this buildpack is not guaranteed compatible
- Applications requiring seamless integration with other Heroku buildpacks for asset compilation when using Elixir releases
- Organizations needing immediate support for the latest Heroku stacks, as version compatibility can lag
Pros & Cons
Pros
Uses prebuilt Elixir and Erlang binaries to reduce build times, as highlighted in the features for streamlined deployment.
Offers an easy-to-use elixir_buildpack.config file for customizing versions, hooks, and build steps, allowing extensive control over the deployment process.
Caches Hex packages, Mix dependencies, and downloads to speed up subsequent builds, improving deployment efficiency as noted in the README.
Supports hook_pre_compile, hook_compile, and hook_post_compile for integrating custom steps like testing or asset compilation, adding flexibility.
Cons
Exclusively designed for Heroku, making it unsuitable for other deployment platforms without significant modifications or workarounds.
Requires careful pinning of buildpack versions via commit SHAs to avoid breaking changes, as updates may not support all old Elixir/Erlang versions or Heroku stacks.
Not guaranteed compatible with Cloud Native Buildpacks, necessitating the use of a separate buildpack for modern container-based workflows.
Using Elixir releases can interfere with other buildpacks like Phoenix static, as warned in the README, requiring additional configuration or alternatives.
Frequently Asked Questions
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