Bazel pip rules

Overview

This repository provides support for installing pip packages. Usage is similar to rules_python.

Main features

• Fetch pip packages incrementally. Fetch happens only if needed by a target.

• Support for namespace packages

• Reproducible wheel builds.

• Support for passing arguments to pip_install. You can optionally pass the same arguments that pip install accepts to pip_install. For example, if you have wheels for all the packages you can have pip_install(["--only-binary", ":all"]).

• Support for python version. The assumption is that each python version has its own requirements file and the python binary of that version exists in the global environment.

NOTE: For full hermetic builds always use a requirements files that is produced by pip-compile. In that case, you can disable internal call to pip-compile by passing compile = False to pip_import rule. Also pre-build the wheels in advance.

Setup

Add the following to your WORKSPACE file:

load("@bazel_tools//tools/build_defs/repo:git.bzl", "http_archive")

http_archive(
    name = "com_github_ali5h_rules_pip",
    strip_prefix = "rules_pip-<revision>",
    sha256 = "<revision_hash>",
    urls = ["https://github.com/ali5h/rules_pip/archive/<revision>.tar.gz"],
)

load("@com_github_ali5h_rules_pip//:defs.bzl", "pip_import")

pip_import(
   name = "pip_deps",
   requirements = "//path/to:requirements.txt",

   # default value is "python"
   # python_interpreter="python3",

   # or specify a python runtime label
   # python_runtime="@python3_x86_64//:bin/python3",

   # set compile to false only if requirements files is already compiled
   # compile = False
)

load("@pip_deps//:requirements.bzl", "pip_install")
pip_install([<optional pip install args])