Add Rust environment (#3)

Adds a Rust environment with necessary tooling like `cargo`, `rustc`,
and linkers, and recommended tooling like `clippy` and `rustfmt`.

---------

Co-authored-by: Rok Garbas <rok@flox.dev>

README.md

@@ -7,6 +7,7 @@
 | |
 | **Languages:** |
 | `python-poetry`  | ✅ | ✅ | ✅ | |
+| `rust`  | ✅ | ✅ | ✅ | Rust environment |
 | **Databases:** |
 | `postgres`  | ✅ | ✅ | ✅ | |
 | `redis`     | ✅ | ✅ | ✅ | |
@@ -21,8 +22,7 @@
 | `qmk` | ✅ | ✅ | ✅ | Open-source keyboard firmware for Atmel AVR and Arm USB families |
 | `anthropic`       |  |  |  | |
 | `direnv`          |  |  |  | |
-| `flaim`           |  |  |  | |
-| `flaim` | ✅ | ✅ | | A stack of Python modules for Stable Diffusion |
+| `flaim` | ✅ | ✅ | ✅ | A stack of Python modules for Stable Diffusion |
 | `fooocus`         |  |  |  | |
 | `metabase`        |  |  |  | |
 | `ollama`          |  |  |  | |

rust/.flox/env.json

@@ -0,0 +1 @@
+{"name":"rust","version":1}

rust/.flox/env/manifest.toml

@@ -0,0 +1,51 @@
+version = 1
+
+[install]
+# Rust toolchain, put them in the same package group
+# so rustc/cargo/etc exactly match versions/dependencies.
+cargo.pkg-path = "cargo"
+cargo.pkg-group = "rust-toolchain"
+rustc.pkg-path = "rustc"
+rustc.pkg-group = "rust-toolchain"
+clippy.pkg-path = "clippy"
+clippy.pkg-group = "rust-toolchain"
+rustfmt.pkg-path = "rustfmt"
+rustfmt.pkg-group = "rust-toolchain"
+rust-lib-src.pkg-path = "rustPlatform.rustLibSrc"
+rust-lib-src.pkg-group = "rust-toolchain"
+
+# rust-analyzer goes in its own group because it's updated
+# on a different cadence from the compiler and doesn't need
+# to match versions
+rust-analyzer.pkg-path = "rust-analyzer"
+rust-analyzer.pkg-group = "rust-analyzer"
+
+# Linkers
+clang.pkg-path = "clang"
+clang.systems = ["aarch64-darwin", "x86_64-darwin"]
+gcc.pkg-path = "gcc"
+gcc.systems = ["aarch64-linux", "x86_64-linux"]
+
+# Platform-specific libraries
+libiconv.pkg-path = "libiconv"
+libiconv.systems = ["aarch64-darwin", "x86_64-darwin"]
+
+# Extra tools
+cargo-nextest.pkg-path = "cargo-nextest"
+cargo-watch.pkg-path = "cargo-watch"
+cargo-semver-checks.pkg-path = "cargo-semver-checks"
+# For more use search: flox search cargo- --all
+
+[vars]
+
+[hook]
+
+[profile]
+
+[options]
+systems = [
+  "aarch64-darwin",
+  "x86_64-darwin",
+  "aarch64-linux",
+  "x86_64-linux",
+]

rust/.gitignore

@@ -0,0 +1 @@
+/target

rust/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

rust/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

rust/test.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+set -eo pipefail
+
+check_command() {
+    if ! command -v $1 2>&1 >/dev/null
+    then
+        echo "Error: '$1' command could not be found."
+        exit 1
+    fi
+}
+
+check_command rustc
+check_command rustfmt
+check_command cargo
+check_command cargo-fmt
+check_command cargo-clippy
+
+
+cargo fmt
+echo ">>> Formatting code"
+
+cargo clippy
+echo ">>> Linting code"
+
+cargo run
+echo ">>> Building and running code"
+
+cargo test
+echo ">>> Testing code"