Prepare to make a template

Cargo.lock

@@ -31,7 +31,6 @@ name = "bouncy"
 version = "0.1.0"
 dependencies = [
  "clap",
- "toml",
 ]
 
 [[package]]
@@ -64,12 +63,6 @@ version = "0.2.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9385f66bf6105b241aa65a61cb923ef20efc665cb9f9bb50ac2f0c4b7f378d41"
 
-[[package]]
-name = "serde"
-version = "1.0.125"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "558dc50e1a5a5fa7112ca2ce4effcb321b0300c0d4ccf0776a9f60cd89031171"
-
 [[package]]
 name = "strsim"
 version = "0.8.0"
@@ -85,15 +78,6 @@ dependencies = [
  "unicode-width",
 ]
 
-[[package]]
-name = "toml"
-version = "0.5.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a31142970826733df8241ef35dc040ef98c679ab14d7c3e54d827099b3acecaa"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "unicode-width"
 version = "0.1.8"

Cargo.toml

@@ -1,11 +1,10 @@
 [package]
-name = "bouncy"
-version = "0.1.0"
 authors = ["Sridhar Ratnakumar <srid@srid.ca>"]
 edition = "2018"
+name = "bouncy"
+version = "0.1.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 clap = "2.33.3"
-toml = "0.5.8"

README.md

@@ -1,9 +1,36 @@
-Requires Nix Flakes.
+A template Rust project with fully functional and no-frills Nix support, as well as builtin VSCode configuration to get IDE support without doing anything (open in VSCode and accept the suggestions).
+
+## Adapting this template
+
+Change `name` in Cargo.toml and flake.nix. Also change `description` in flake.nix.
+
+## Development (Flakes)
+
+This repo uses [Flakes](https://nixos.wiki/wiki/Flakes) from the get-go, but compat is provided for traditional nix-shell/nix-build as well (see the section below).
 
 ```
-# dev shell
+# Dev shell
 nix develop
 
 # or just run directly
+nix run
+
+# or run via cargo
 nix develop -c cargo run
-```
+
+# build
+nix build
+```
+
+## Development (Legacy Nix)
+
+```
+# Dev shell
+nix-shell
+
+# run via cargo
+nix-shell --run 'cargo run'
+
+# build
+nix-build
+```

flake.lock

@@ -49,11 +49,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1617636226,
+        "lastModified": 1617899217,
-        "narHash": "sha256-iZhBWrOR2DoDs1C+0FlnM9AQLMol/qoGQ+d+S43CKJM=",
+        "narHash": "sha256-gd5JHH7IkeoIQ/oiGZSqDpGdGt7DMRJTQ8JiD8+hdOQ=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3d1a7716d7f1fccbd7d30ab3b2ed3db831f43bde",
+        "rev": "9e377a6ce42dccd9b624ae4ce8f978dc892ba0e2",
         "type": "github"
       },
       "original": {
@@ -93,11 +93,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1617848844,
+        "lastModified": 1618021386,
-        "narHash": "sha256-nhPuATSHRrzfZNjtl8zmMhZklYFCHiQd7+uf+jQbd+o=",
+        "narHash": "sha256-jxuzRfJZs4+WqnbvduTOFBnPHM0CsusSV+plzP+QG9c=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "70330a767d25daa6063e89e38d68b94b2d971831",
+        "rev": "6642000a09ac2d0a1a8d91849e28a36f2c6c35cf",
         "type": "github"
       },
       "original": {

flake.nix

@@ -2,7 +2,7 @@
 # only `name` and `description` below.
 
 {
-  description = "...";
+  description = "My awesome Rust project";
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

src/main.rs

@@ -1,126 +1,3 @@
-use std::fmt::{Display, Formatter};
+fn main() {
-use clap::{App, SubCommand};
+    println!("Hello World!");
-
-
-enum VertDir {
-    Up,
-    Down,
-}
-
-enum HorizDir {
-    Left,
-    Right,
-}
-
-struct Ball {
-    x: u32,
-    y: u32,
-    vert_dir: VertDir,
-    horiz_dir: HorizDir,
-}
-
-struct Frame {
-    width: u32,
-    height: u32,
-}
-
-struct Game {
-    frame: Frame,
-    ball: Ball,
-}
-
-impl Game {
-    fn new() -> Game {
-        let frame = Frame {
-            width: 60,
-            height: 30,
-        };
-        let ball = Ball {
-            x: 2,
-            y: 4,
-            vert_dir: VertDir::Up,
-            horiz_dir: HorizDir::Left,
-        };
-        Game {frame, ball}
-    }
-
-    fn step(&mut self) {
-        self.ball.bounce(&self.frame);
-        self.ball.mv();
-    }
-}
-
-impl Ball {
-    fn bounce(&mut self, frame: &Frame) {
-        if self.x == 0 {
-            self.horiz_dir = HorizDir::Right;
-        } else if self.x == frame.width - 1 {
-            self.horiz_dir = HorizDir::Left;
-        }
-
-        if self.y == 0 {
-            self.vert_dir = VertDir::Down;
-        } else if self.y == frame.height - 1 {
-            self.vert_dir = VertDir::Up;
-        }
-    }
-
-    fn mv(&mut self) {
-        match self.horiz_dir {
-            HorizDir::Left => self.x -= 1,
-            HorizDir::Right => self.x += 1,
-        }
-        match self.vert_dir {
-            VertDir::Up => self.y -= 1,
-            VertDir::Down => self.y += 1,
-        }
-    }
-}
-
-impl Display for Game {
-    fn fmt(&self, fmt: &mut Formatter) -> std::fmt::Result {
-        let top_bottom = |fmt: &mut Formatter| {
-            write!(fmt, "+");
-            for _ in 0..self.frame.width {
-                write!(fmt, "-");
-            }
-            write!(fmt, "+\n")
-        };
-
-        top_bottom(fmt)?;
-
-        for row in 0..self.frame.height {
-            write!(fmt, "|");
-
-            for column in 0..self.frame.width {
-                let c = if row == self.ball.y && column == self.ball.x {
-                    'o'
-                } else {
-                    ' '
-                };
-                write!(fmt, "{}", c);
-            }
-
-            write!(fmt, "|\n");
-        }
-
-        top_bottom(fmt)
-    }
-}
-
-fn main () {
-    let matches = App::new("bouncy")
-        .version("1.0")
-        .subcommand(SubCommand::with_name("ping")).get_matches();
-    if let Some(_matches) = matches.subcommand_matches("ping") {
-        println!("pong")
-    } else {
-        let mut game = Game::new();
-        let sleep_duration = std::time::Duration::from_millis(33);
-        loop {
-            println!("{}", game);
-            game.step();
-            std::thread::sleep(sleep_duration);
-        }
-    }
 }