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Buildpacks provide framework and runtime support for apps. Buildpacks typically examine your apps to determine what dependencies to download and how to configure the apps to communicate with bound services.
When you push an app, Cloud Foundry automatically detects an appropriate buildpack for it. This buildpack is used to compile or prepare your app for launch.
Note: Cloud Foundry deployments often have limited access to dependencies. This limitation occurs when the deployment is behind a firewall, or when administrators want to use local mirrors and proxies. In these circumstances, Cloud Foundry provides a Buildpack Packager app. For more information, see the Buildpack Packager repository on GitHub.
The following topics discuss different usage scenarios for buildpacks in Cloud Foundry:
For information about the existing buildpacks that Cloud Foundry supports, see System Buildpacks.
A Cloud Foundry-compatible Cloud Native Buildpack (CF-compatible CNB) is a bundled collection of CNBs.
CNBs are modular buildpacks. Using CNBs to deploy apps leads to improved performance, informative logging, and easier configuration as compared to Cloud Foundry-only buildpacks. For general information about CNBs, see What Are Buildpacks? in Buildpacks.io.
CF-compatible CNBs include a Compatibility Layer that allows the CNBs to run on Cloud Foundry.
For information about deploying a sidecar buildpack, see Sidecar Buildpack.
For a list of unsupported, community-created buildpacks, see the Community created section of the Buildpack information for Cloud Foundry v2 page in the cf-docs-contrib repository on GitHub.
For information about customizing existing buildpacks and developing new buildpacks, see Customizing and Developing Buildpacks.
For information about updating and releasing a new version of a Cloud Foundry buildpack through the Cloud Foundry Buildpacks Team Concourse pipeline, see Using CI for Buildpacks. You can use this as a model when working with Concourse to build and release new versions of your own buildpacks.