From c9a0f8501fdf186f7368732dd41e6a19caf49188 Mon Sep 17 00:00:00 2001
From: puppe1990 <matheus.puppe90@hotmail.com>
Date: Thu, 24 Sep 2026 12:36:24 -0300
Subject: [PATCH] feat(runtime): detect Cargo.toml as rust

cleat init and app registration pick rust for Loco/Cargo projects so
the panel builds them instead of defaulting to phoenix.
---
 README.md                         | 20 +++++++++++++++++---
 lib/cleat/commands/init.ex        |  1 +
 lib/cleat/runtime.ex              |  5 ++++-
 test/cleat/commands/init_test.exs | 19 +++++++++++++++++++
 test/cleat/runtime_test.exs       | 21 +++++++++++++++++++++
 5 files changed, 62 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index b1b7d24..1b6743f 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,8 @@
 
 `cleat` is the command-line client for [Cleat](https://github.com/cleat-cloud/cleat-deploy),
 a self-hosted PaaS that deploys Phoenix/Elixir, Go, Node (Next.js / TanStack
-Start), Ruby on Rails and static apps to Hetzner Cloud and AWS Lightsail over
-SSH.
+Start), Ruby on Rails, Rust (Loco) and static apps to Hetzner Cloud and AWS
+Lightsail over SSH.
 
 It talks to the panel's JSON API (`/api/v1`) to list servers and apps, manage env
 vars, trigger deploys, and watch build and runtime logs.
@@ -175,6 +175,20 @@ Ruby version resolution order: `ruby_version` → `.ruby-version` → the Gemfil
 `ruby` directive → 3.3.6. Start command: `start_command` → `bundle exec puma -C
 config/puma.rb` → `bundle exec puma -b tcp://0.0.0.0:$PORT`.
 
+For Rust / Loco, `cleat init` detects a `Cargo.toml` and picks the `rust`
+runtime. The panel installs rustup, runs `cargo build --release`, publishes
+`bin/server` plus `config/`/`assets/`/`frontend/`, and starts a systemd unit.
+Loco apps (`loco-rs` or `config/production.yaml`) use `./bin/server start` and
+`./bin/server db migrate`. Set `DATABASE_URL` and `JWT_SECRET` as panel env
+vars.
+
+```json
+{
+  "runtime": "rust",
+  "start_command": "./bin/server start"
+}
+```
+
 Commit the manifest so the panel picks it up on the next deploy.
 
 ### Logs
@@ -222,7 +236,7 @@ Register and deploy in one shot. If the repo is unknown, pass `--server` and
 `--host`; the app is created with sane defaults (slug from the repo name). The
 runtime is detected from the local project the same way `cleat init` does, so a
 Next.js / TanStack Start repo registers as `node`; override it with `--runtime`
-(`phoenix`, `golang`, `node`, `rails` or `static`):
+(`phoenix`, `golang`, `node`, `rails`, `rust` or `static`):
 
 ```bash
 cleat deploy --repo owner/repo --server 3 --host repo.example.com --watch
diff --git a/lib/cleat/commands/init.ex b/lib/cleat/commands/init.ex
index fa453ee..2d7b6be 100644
--- a/lib/cleat/commands/init.ex
+++ b/lib/cleat/commands/init.ex
@@ -63,6 +63,7 @@ defmodule Cleat.Commands.Init do
   defp default_release_name("static"), do: nil
   defp default_release_name("node"), do: nil
   defp default_release_name("rails"), do: nil
+  defp default_release_name("rust"), do: nil
   defp default_release_name("phoenix"), do: mix_app()
 
   defp mix_app do
diff --git a/lib/cleat/runtime.ex b/lib/cleat/runtime.ex
index 84c74f6..56aa3c9 100644
--- a/lib/cleat/runtime.ex
+++ b/lib/cleat/runtime.ex
@@ -7,7 +7,7 @@ defmodule Cleat.Runtime do
   `node` instead of silently defaulting to `phoenix`.
   """
 
-  @runtimes ~w(phoenix golang static node rails)
+  @runtimes ~w(phoenix golang static node rails rust)
 
   @doc """
   Detects the runtime for the current working directory, defaulting to `phoenix`.
@@ -25,6 +25,9 @@ defmodule Cleat.Runtime do
       file?(dir, "mix.exs") ->
         "phoenix"
 
+      file?(dir, "Cargo.toml") ->
+        "rust"
+
       rails?(dir) ->
         "rails"
 
diff --git a/test/cleat/commands/init_test.exs b/test/cleat/commands/init_test.exs
index b6e7402..107b053 100644
--- a/test/cleat/commands/init_test.exs
+++ b/test/cleat/commands/init_test.exs
@@ -114,6 +114,25 @@ defmodule Cleat.Commands.InitTest do
     assert read_manifest()["runtime"] == "node"
   end
 
+  test "detects a Loco project as rust" do
+    File.write!(
+      "Cargo.toml",
+      """
+      [package]
+      name = "hello_loco"
+      version = "0.1.0"
+
+      [dependencies]
+      loco-rs = "0.16"
+      """
+    )
+
+    assert :ok = Init.run(%{})
+
+    manifest = read_manifest()
+    assert manifest["runtime"] == "rust"
+  end
+
   test "detects a Rails project as rails" do
     File.write!("Gemfile", ~s(source "https://rubygems.org"\ngem "rails", "~> 7.1"\n))
     File.mkdir_p!("config")
diff --git a/test/cleat/runtime_test.exs b/test/cleat/runtime_test.exs
index 627dbdd..001330a 100644
--- a/test/cleat/runtime_test.exs
+++ b/test/cleat/runtime_test.exs
@@ -59,6 +59,27 @@ defmodule Cleat.RuntimeTest do
     assert Runtime.detect() == "rails"
   end
 
+  test "detects a Loco / Cargo project as rust" do
+    File.write!(
+      "Cargo.toml",
+      """
+      [package]
+      name = "hello_loco"
+      version = "0.1.0"
+
+      [dependencies]
+      loco-rs = "0.16"
+      """
+    )
+
+    assert Runtime.detect() == "rust"
+  end
+
+  test "normalizes rust as a valid runtime" do
+    assert Runtime.normalize("rust") == "rust"
+    assert Runtime.normalize("RUST") == "rust"
+  end
+
   test "detects a bare package.json as static" do
     File.write!("package.json", ~s({"name":"site"}))