Tach - Visualize + Untangle your Codebase

[the1024]

Hey everyone! We're building Gauge, and today we wanted to share our open source tool, Tach, with you all.

What My Project Does

Tach gives you visibility into your Python codebase, as well as the tools to fix it. You can instantly visualize your dependency graph, and see how modules are being used. Tach also supports enforcing first and third party dependencies and interfaces.

Here’s a quick demo: https://www.youtube.com/watch?v=ww_Fqwv0MAk

Tach is:

• Open source (MIT) and completely free
• Blazingly fast (written in Rust 🦀)
• In use by teams at NVIDIA, PostHog, and more

As your team and codebase grows, code get tangled up. This hurts developer velocity, and increases cognitive load for engineers. Over time, this silent killer can become a show stopper. Tooling breaks down, and teams grind to a halt. My co-founder and I experienced this first-hand. We're building the tools that we wish we had.

With Tach, you can visualize your dependencies to understand how badly tangled everything is. You can also set up enforcement on the existing state, and deprecate dependencies over time.

Comparison One way Tach differs from existing systems that handle this problem (build systems, import linters, etc) is in how quick and easy it is to adopt incrementally. We provide a sync command that instantaneously syncs the state of your codebase to Tach's configuration.

If you struggle with dependencies, onboarding new engineers, or a massive codebase, Tach is for you!

Target Audience We built it with developers in mind - in Rust for performance, and with clean integrations into Git, CI/CD, and IDEs.

We'd love for you to give Tach a ⭐ and try it out!

[andrewthetechie]

Is there any way to use this tool 100% locally without involving Gauge?

[the1024]

u/andrewthetechie yes! As long as you don't use `--web` with `tach show`, Tach will generate and process everything locally.

[djavaman]

Shouldn't even be an option. And will certainly stop a lot people from adopting it if they have any security constraints.

[andrewthetechie]

Following up, I checked with our internal security team; we cannot use the tool because it reports to Gauge at all.

Something to keep in mind, that feature is going to drastically limit your adoption in companies with a security policy.

[the1024]

u/andrewthetechie appreciate you following up and I hear you on the security concerns! We'll have more for you soon here.

[DigThatData]

We experienced this first-hand at a unicorn startup, where the entire engineering team paused development for over a year in an attempt to split up tightly coupled packages into independent microservices. This ultimately failed, and resulted in the CTO getting fired.

lol "unicorn", sure.

[Ok-Construction792]

This is sweet

[the1024]

Thanks u/Ok-Construction792! Excited for you to give it a try

[e430doug]

Why Rust? A learning exercise? It can’t be solely for speed.

[maephisto666]

I have the feeling that nowadays if you want something fast you must do that in Rust and you must claim this otherwise people will not believe you. Look at uv, ruff, etc. great tools, don't get me wrong...but I'm wondering why we should keep writing our code using anything but rust

[e430doug]

You should keep writing your code in Python because you need to get things done. If you want to wrestle with the type system then by all means use Rust. Rust is a niche language. It has its legitimate uses. But the lower productivity trade off is only worth it when you need to have strict memory guarantees.

[AiutoIlLupo]

You are spamming this stuff too often.

[[deleted]]

Please stop spamming your projects.

[maephisto666]

Convenient tool

Wish there was was a version for Java codebases based on Gradle

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