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Miniconda Cloud Native Buildpack

Integration

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

[[requires]]

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

  # The version of the conda dependency is not required. In the case it
  # is not specified, the buildpack will provide the default version, which can
  # be seen in the buildpack.toml file.
  # If you wish to request a specific version, the buildpack supports
  # specifying a semver constraint in the form of "4.*", "4.7.*", or even
  # "4.7.12".
  version = "4.7.12"

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

    # Setting the build flag to true will ensure that the conda
    # dependency is available on the $PATH for subsequent buildpacks during
    # their build phase. If you are writing a buildpack that needs to run
    # miniconda during its build process, this flag should be set to true.
    build = true

    # Setting the launch flag to true will ensure that the conda
    # dependency is available on the $PATH for the running application. If you are
    # writing an application that needs to run miniconda at runtime, this flag
    # should be set to true.
    launch = true

Usage

To package this buildpack for consumption:

$ ./scripts/package.sh --version <version-number>

This will create a buildpackage.cnb file under the build directory which you can use to build your app as follows: pack build <app-name> -p <path-to-app> -b build/buildpackage.cnb -b <other-buildpacks..>

Vendoring

Follow these steps to vendor python packages in your app using conda

Prerequisites

  • Must be run on linux OS and case-sensitive file system
  • Install conda build tools: conda install conda-build

Steps

  1. cd <my_conda_app>
  2. Create environment.yml file in the root of your app
  3. CONDA_PKGS_DIRS=vendor/noarch conda env create -f environment.yml -n <env_name>
  4. conda index vendor
  5. conda list -n <env_name> -e > package-list.txt
  6. Commit environment.yml, vendor, and package-list.txt

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