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Firebase Functions Python build cannot reliably install private Artifact Registry packages

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まだ誰も着手していません。

評価

難易度
4/5
見積もり時間
3〜5日
初心者へのやさしさ
35/100
issue の種類
バグ
明瞭さ
おおむね明確
活発さ
停滞
技術スタック
google-cloud, python

調査の方向性

まず、指定された builder image で、記載されている google.python.pip buildpack とコマンド python3 -m pip install --requirement requirements.txt を確認します。サンプルの requirements.txt を使って失敗を再現し、Cloud Build サービス アカウントの権限を確認します。Firebase Functions のデプロイで、vendoring、カスタムパイプライン、コンテナ化を行わずに非公開の Artifact Registry パッケージをインストールできれば完了です。

索引モデルが issue の本文から書いたものです。

説明

feature-request

Summary

Deploying Firebase Functions written in Python cannot reliably install private Python packages hosted in Google Artifact Registry using the documented authentication mechanism.

Although Artifact Registry supports authentication via the keyrings.google-artifactregistry-auth backend, the Firebase Functions build process installs dependencies in a single pip invocation. This creates a bootstrapping problem where the authentication backend must already be installed before pip attempts to resolve private dependencies.

As a result, private packages cannot be consumed out-of-the-box during function deployment causing deployment issues and ultimately meaning private packages cannot be consumed in firebase functions. Private Python packages are a common pattern for shared internal libraries, and the current limitation makes this workflow difficult.

Expected Behaviour

A Firebase Functions deployment should be able to install private Python packages hosted in Artifact Registry without requiring custom build pipelines, vendored wheels, or containerization.

For example, the following requirements.txt should work:

--extra-index-url https://<LOCATION>-python.pkg.dev/<PROJECT>/<REPO>/simple/

private-package==0.0.1

provided that:

  • the Cloud Build service account has artifactregistry.reader
  • the repository contains the package

Actual Behaviour

The Artifact Registry authentication mechanism requires the keyring backend to be present before pip attempts to fetch packages.

However pip resolves and downloads packages before installing their dependencies, meaning that adding the backend as a dependency does not help.

Example attempt:

--extra-index-url https://<LOCATION>-python.pkg.dev/<PROJECT>/<REPO>/simple/

keyring
keyrings.google-artifactregistry-auth
private-package==0.0.1

This still fails because pip attempts to resolve private-package before installing the keyring backend. This creates a bootstrap race condition

Why this is a Problem

The current behavior makes it effectively impossible to use private Artifact Registry Python packages with Firebase Functions without workarounds such as:

  • vendoring wheels into the repository
  • migrating to cloud run where the build process can be controlled

Environment Details

Builder image:

europe-west2-docker.pkg.dev/serverless-runtimes/google-22-full/builder/python:python_20260224_RC00_lightweight

Buildpacks used:

google.utils.archive-source
google.python.runtime
google.python.functions-framework
google.python.pip
google.utils.label-image
google.python.link-runtime

The pip step is executed as:

python3 -m pip install --requirement requirements.txt

Python runtime:

Python 3.13.12

Suggested Solutions

Option 1: Preinstall Artifact Registry authentication backend

Ensure the build environment includes:

keyring
keyrings.google-artifactregistry-auth

before the pip install step.

Option 2: Two-phase dependency install

Modify the Python buildpack to run:

pip install keyring keyrings.google-artifactregistry-auth
pip install -r requirements.txt
主要言語
Python
スター
167
フォーク
36
平均マージ
4日 3時間
マージ済み PR(30日)
1

環境構築

はじめの一歩

  1. issue を最後まで読み、次にプロジェクトのコントリビューションガイドを読みます。
  2. 着手することを issue にコメントします — 二人が同じ作業をするのを防げます。
  3. リポジトリをフォークし、ブランチを切って変更します。
  4. issue 番号を参照したプルリクエストを送ります。

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