feat: a nix package, config and devShell for supabase-auth

[samrose]

Add Nix Flake for Supabase Auth Service

Overview

This PR adds a Nix flake configuration for the Supabase Auth service, providing a reproducible build environment and configuration management system. The flake packages the Go application and generates configuration files based on a Nix module system.

Key Features

• Reproducible Builds: Uses buildGoModule to create a reproducible build of the auth service
• Configuration Management: Implements a Nix module system for managing service configuration
• Multi-platform Support: Supports multiple systems (x86_64-linux, aarch64-linux, aarch64-darwin)
• Development Environment: Includes a development shell with all necessary Go tools

Configuration

The flake provides two main configuration components:

1. Auth Module: Defines all service configuration options with sensible defaults
2. Management Script: Generates a manage-auth script for controlling the service

Environment Variables

The configuration supports both legacy and GOTRUE_-prefixed environment variables:

{
  GOTRUE_DB_DRIVER = "postgres";
  GOTRUE_SITE_URL = "http://localhost:3000";
  SITE_URL = "http://localhost:3000";
  # ... other configuration options
}

Usage

Building

nix build

Development

nix develop

Running the Service

./result/bin/manage-auth start

Requirements

• PostgreSQL database running (default: localhost:5432)
• Database user and password configured in the settings

Todo

Testing

• The flake will be able to run the test suite with:

nix flake check -L

gh action CI

• To build and cache the package

[coveralls]

Pull Request Test Coverage Report for Build 15089670950

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 9 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.3%) to 69.637%

---

Files with Coverage Reduction	New Missed Lines	%
internal/api/web3.go	9	88.98%

Totals
Change from base Build 14865651045:	0.3%
Covered Lines:	10949
Relevant Lines:	15723

---

💛 - Coveralls

[cstockton]

Thanks for your efforts here, but we can't accept this pr as we don't intend on maintaining auth packages in this repository. For big undertakings like this my suggestion is to follow the contributing guidelines and open an issue to discuss things first.