basic project structure

.gitignore

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+/target
+
+# Devenv
+.devenv*
+devenv.local.nix
+devenv.local.yaml
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml

Cargo.toml

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+[package]
+name = "rust-starter"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

devenv.nix

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+{ pkgs, lib, config, inputs, ... }:
+
+{
+  # https://devenv.sh/basics/
+  env.GREET = "devenv";
+
+  # https://devenv.sh/packages/
+  packages = [ pkgs.git ];
+
+  # https://devenv.sh/languages/
+  # languages.rust.enable = true;
+
+  # https://devenv.sh/processes/
+  # processes.dev.exec = "${lib.getExe pkgs.watchexec} -n -- ls -la";
+
+  # https://devenv.sh/services/
+  # services.postgres.enable = true;
+
+  # https://devenv.sh/scripts/
+  scripts.hello.exec = ''
+    echo hello from $GREET
+  '';
+
+  # https://devenv.sh/basics/
+  enterShell = ''
+    hello         # Run scripts directly
+    git --version # Use packages
+  '';
+
+  # https://devenv.sh/tasks/
+  # tasks = {
+  #   "myproj:setup".exec = "mytool build";
+  #   "devenv:enterShell".after = [ "myproj:setup" ];
+  # };
+
+  # https://devenv.sh/tests/
+  enterTest = ''
+    echo "Running tests"
+    git --version | grep --color=auto "${pkgs.git.version}"
+  '';
+
+  # https://devenv.sh/git-hooks/
+  # git-hooks.hooks.shellcheck.enable = true;
+
+  # See full reference at https://devenv.sh/reference/options/
+}

devenv.yaml

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+# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json
+inputs:
+  nixpkgs:
+    url: github:cachix/devenv-nixpkgs/rolling
+
+# If you're using non-OSS software, you can set allow_unfree to true.
+# allow_unfree: true
+
+# If you're not willing to allow unsupported packages:
+# allow_unsupported_system: false
+
+# If you're willing to use a package that's vulnerable
+# permitted_insecure_packages:
+#  - "openssl-1.1.1w"
+
+# If you have more than one devenv you can merge them
+#imports:
+# - ./backend

flake.nix

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+{
+  description = "A very basic flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }: {
+
+    packages.x86_64-linux.hello = nixpkgs.legacyPackages.x86_64-linux.hello;
+
+    packages.x86_64-linux.default = self.packages.x86_64-linux.hello;
+
+  };
+}

src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}