Table of Contents

• pip Environment Variables
• Vendor(Embed) dependencies

pip Environment Variables reference

pip's command line options can be set with environment variables using the format PIP_<UPPER_LONG_NAME>. Dashes (-) have to be replaced with underscores (_).

Vendor(Embed) dependencies howto

Updating vendored dependencies is based on how pip does. For more details about vendoring, SEE Vendoring Policy.

1. First, install target dependencies within a _vedor/ (or the name you like) folder.

   pip install -t _vendor -r _vendor/requirements.txt --no-compile --no-deps

2. (Optional) To make vendored packages compact, delete unnecessary things like *.dist-info, *.egg-info, bin/, etc.
3. Decide how to expose vendored packages:

   • If you are vendoring for only a specific application you write, the easiest way is to append the _vendor path to sys.path

     import os
     import sys
     
     # Add vendor directory to module search path
     parent_dir = os.path.abspath(os.path.dirname(__file__))
     vendor_dir = os.path.join(parent_dir, 'vendor')
     
     sys.path.append(vendor_dir)
     
     # Now you can import any library located in the "vendor" folder!
     import requests

   • If you need completely insulated vendored dependencies, you need to rewrite imports in vendored code and use absolute imports:
     • Rewrite imports; import <name>, from <name>(.*) import to import _vendor.<name>, from _vendor.<name>(.*) import.
     • Import vendored dependencies from _vendor import library1.

4. (Optional) Apply some patches for specific packages, like requests.patch.