base on A Python tool to visualize + enforce dependencies, using modular architecture 🌎 Open source 🐍 Installable via pip 🔧 Able to be adopted incrementally - ⚡ Implemented with no runtime impact ♾️ Interoperable with your existing systems 🦀 Written in rust # Tach [](https://pepy.tech/project/tach) [](https://pypi.Python.org/pypi/tach) [](https://pypi.Python.org/pypi/tach) [](https://pypi.Python.org/pypi/tach) [](https://github.com/gauge-sh/tach/actions/workflows/ci.yml) [](https://microsoft.github.io/pyright/) [](https://github.com/astral-sh/ruff) Tach is a Python tool to enforce dependencies and interfaces, written in Rust. Tach is inspired by the [modular monolith](https://www.milanjovanovic.tech/blog/what-is-a-modular-monolith) architecture. [Docs](https://docs.gauge.sh) [Discord](https://discord.gg/Kz2TnszerR) <div align="center"> <img src="docs/assets/light_logo.png" alt="gauge-logo" width="30%" style="border-radius: 50%; padding-bottom: 20px"/> </div> https://github.com/user-attachments/assets/11eec4a1-f80a-4f13-9ff3-91a9760133b6 Tach can enforce: - 📋 Imports only come from [declared dependencies](https://docs.gauge.sh/usage/configuration#modules) - 🤝 Cross-module calls use the [public interface](https://docs.gauge.sh/usage/configuration#interfaces) - ⛓️‍💥 [No cycles](https://docs.gauge.sh/usage/configuration) in the dependency graph Tach is: - 🌎 Open source - 🐍 Installable via pip - 🔧 Able to be adopted incrementally - ⚡ Implemented with no runtime impact - ♾️ Interoperable with your existing systems ## Getting Started ### Installation ```bash pip install tach ``` ### Setup Tach will guide you through initial project setup. Run: ```bash tach init ``` After an introductory message, you will see a file tree interface allowing you to interactively configure your project. Use the arrow keys to navigate, and mark each module boundary with 'Enter'. You can mark all of your top-level Python packages, or just a few that you want to track. FAQ: [What is a module?](https://docs.gauge.sh/usage/faq#what-is-a-module%3F) If your Python code lives below your project root, or if you are working in a monorepo with multiple Python packages, mark your Python [source roots](https://docs.gauge.sh/usage/configuration#source-roots) using the 's' key. ### Enforcement Tach comes with a cli command to enforce the boundaries that you just set up! From the root of your Python project, run: ```bash tach check ``` You will see: ```bash ✅ All modules validated! ``` You can validate that Tach is working by: 1. Removing an item from the `depends_on` key in `tach.toml`, or marking it as [deprecated](https://docs.gauge.sh/usage/deprecate) 2. By adding an import between modules that didn't previously import from each other. Give both a try and run `tach check` again. This will generate an error: ```bash ❌ tach/check.py[L8]: Cannot use 'tach.filesystem'. Module 'tach' cannot depend on 'tach.filesystem'. ``` Each error indicates an import which violates your dependencies. If your terminal supports hyperlinks, click on the file path to go directly to the error. When an error is detected, `tach check` will exit with a non-zero code. It can be easily integrated with CI/CD, [Pre-commit hooks](https://docs.gauge.sh/usage/commands#tach-install), and [VS Code](https://marketplace.visualstudio.com/items?itemName=Gauge.tach), and more! ### Extras Visualize your dependency graph. ```bash tach show [--web] ``` Tach will generate a graph of your dependencies. Here's what this looks like for Tach:  Note that this graph is generated remotely with the contents of your `tach.toml` when running `tach show --web`. If you would like to use the [GraphViz DOT format](https://graphviz.org/about/) locally, simply running `tach show` will generate `tach_module_graph.dot` in your working directory. You can view the dependencies and usages for a given path: ```bash tach report my_package/ # OR tach report my_module.py ``` e.g.: ```bash > tach report python/tach/filesystem [Dependencies of 'python/tach/filesystem'] python/tach/filesystem/install.py[L6]: Import 'tach.hooks.build_pre_commit_hook_content' python/tach/filesystem/project.py[L5]: Import 'tach.constants.CONFIG_FILE_NAME' ... ------------------------------- [Usages of 'python/tach/filesystem'] python/tach/cache/access.py[L8]: Import 'tach.filesystem.find_project_config_root' python/tach/cache/setup.py[L7]: Import 'tach.filesystem.find_project_config_root' ... ``` Tach also supports: - [Public interfaces for modules](https://docs.gauge.sh/usage/interfaces/) - [Deprecating individual dependencies](https://docs.gauge.sh/usage/deprecate) - [Layered architecture](https://docs.gauge.sh/usage/layers) - [Incremental adoption](https://docs.gauge.sh/usage/unchecked-modules) - [Generating JSON dependency maps](https://docs.gauge.sh/usage/commands#tach-map) - [Monorepos and namespace packages](https://docs.gauge.sh/usage/configuration#source-roots) - [Domain ownership](https://docs.gauge.sh/usage/configuration#tach-domain-toml) - [Inline 'ignore' comments](https://docs.gauge.sh/usage/tach-ignore) - [Pre-commit hooks](https://docs.gauge.sh/usage/commands#tach-install) More info in the [docs](https://docs.gauge.sh/). Tach logs anonymized usage statistics which can be [opted out](https://docs.gauge.sh/usage/faq/) of. If you have any feedback, we'd love to talk! If you have any questions or run into any issues, let us know by either reaching out on [Discord](https://discord.gg/Kz2TnszerR) or submitting a [Github Issue](https://github.com/gauge-sh/tach/issues)! --- ### Contributors <a href="https://github.com/gauge-sh/tach/graphs/contributors"> <img src="https://contrib.rocks/image?repo=gauge-sh/tach" /> </a> ", Assign "at most 3 tags" to the expected json: {"id":"13040","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"