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Paketo Buildpack for Bundler

gcr.io/paketo-buildpacks/bundler

The Bundler CNB provides the Bundler binary.

The buildpack installs Bundler onto the $PATH and $GEM_PATH which makes it available for subsequent buildpacks and/or in the final running container.

Integration

The Bundler CNB provides bundler as a dependency. Downstream buildpacks can require the bundler dependency by generating a Build Plan TOML file that looks like the following:

[[requires]]

  # The name of the Bundler dependency is "bundler". This value is considered
  # part of the public API for the buildpack and will not change without a plan
  # for deprecation.
  name = "bundler"

  # The Bundler buildpack supports some non-required metadata options.
  [requires.metadata]

    # Use `version` to request a specific version of `bundler`.
    # This buildpack supports specifying a semver constraint in the form of "2.*", "2.1.*",
    # or even "2.1.4".
    # Optional, defaults to the latest version of `bundler` found in the `buildpack.toml` file.
    version = "2.1.4"

    # When `build` is true, this buildpack will ensure that `bundler` is available
    # on the `$PATH` and `$GEM_PATH` for later buildpacks.
    # Optional, default false.
    build = true

    # When `launch` is true, this buildpack will ensure that `bundler` is available
    # on the `$PATH` and `$GEM_PATH` for the running application.
    # Optional, default false.
    launch = true

Packaging

To package this buildpack for consumption:

./scripts/package.sh --version 0.8.48

This will build the buildpack for all target architectures specified in buildpack.toml (amd64 and arm64 by default) and create architecture-specific archives in the build/ directory.

Publishing

To publish this buildpack to a registry:

./scripts/publish.sh \
  --image-ref 348674388966.dkr.ecr.us-east-1.amazonaws.com/neeto-deploy/paketo/buildpack/bundler:0.8.48

The script will automatically:

  • Read target architectures from buildpack.toml
  • Detect architecture-specific buildpack archives
  • Publish each architecture separately
  • Create and push a multi-arch manifest list

Bundler Configurations

Specifying the Bundler version through buildpack.yml configuration will be deprecated in Bundler Buildpack v1.0.0.

To migrate from using buildpack.yml please set the $BP_BUNDLER_VERSION environment variable at build time either directly (ex. pack build my-app --env BP_BUNDLER_VERSION=2.7.*) or through a project.toml file

$BP_BUNDLER_VERSION="2.1.4"

This will replace the following structure in buildpack.yml:

bundler:
  version: 2.1.4

Logging Configurations

To configure the level of log output from the buildpack itself, set the $BP_LOG_LEVEL environment variable at build time either directly (ex. pack build my-app --env BP_LOG_LEVEL=DEBUG) or through a project.toml file If no value is set, the default value of INFO will be used.

The options for this setting are:

  • INFO: (Default) log information about the progress of the build process
  • DEBUG: log debugging information about the progress of the build process
$BP_LOG_LEVEL="DEBUG"

Compatibility

This buildpack is currently only supported on the Paketo Bionic and Jammy stack distributions. A pre-compiled distribution of Bundler is provided for the Paketo stacks (i.e. io.buildpacks.stack.jammy and io.buildpacks.stacks.bionic).