feat: initial commit

.cargo/config

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+[alias]
+scaffold = "run -p scaffold --release --quiet --"
+download = "run -p download --release --quiet --"
+solve = "run --bin"

.env.example

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+TOKEN=secret
+YEAR=year

.github/workflows/ci.yml

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+name: Check
+
+on: push
+
+env:
+    CARGO_TERM_COLOR: always
+
+jobs:
+    check:
+        runs-on: ubuntu-latest
+        name: Check
+        steps:
+            - uses: actions/checkout@v3
+            - name: cargo check
+              run: cargo check
+    test:
+        runs-on: ubuntu-latest
+        name: Test
+        steps:
+            - uses: actions/checkout@v3
+            - name: cargo test
+              run: cargo test
+    clippy:
+        runs-on: ubuntu-latest
+        name: Lint (clippy)
+        steps:
+            - uses: actions/checkout@v3
+            - name: cargo clippy
+              run: cargo clippy -- -D warnings
+    fmt:
+        runs-on: ubuntu-latest
+        name: Format
+        steps:
+            - uses: actions/checkout@v3
+            - name: cargo fmt
+              run: cargo fmt --check

.gitignore

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+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# aoc-template
+# env vars
+.env
+
+# downloaded inputs
+/data/inputs/*
+!/data/inputs/.keep
+

Cargo.toml

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+[workspace.package]
+description = "advent of code 2023"
+readme = "README.md"
+version = "46.0.0"
+edition = "2021"
+license = "MIT"
+authors = ["Matej Janežič <janezic.mj@gmail.com>"]
+repository = "https://git.janezic.dev/janezicmatej/aoc2023.git"
+
+[workspace]
+members = ["utils/download", "utils/scaffold"]
+
+[package]
+name = "aoc"
+description.workspace = true
+readme.workspace = true
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+repository.workspace = true
+
+[dependencies]
+

LICENSE

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+MIT License
+
+Copyright (c) 2023 Matej Janežič
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+![ci](https://github.com/janezicmatej/aoc2023/actions/workflows/ci.yml/badge.svg)
+# Advent-of-Code 2023
+*This is a dumbed down version of [fspoettel/advent-of-code-rust](https://github.com/fspoettel/advent-of-code-rust) with some extra features*
+
+## Project overview
+
+### Project structure
+- `data/` :
+    - `examples/`: example files go here; you can push this as test are run in ci
+    - `inputs/`: this directory is gitignored, input files go here
+- `src/` :
+    - `bin/`:
+        - `<day>.rs`: solution files 
+    - `lib.rs`: library entrypoint, reusable code goes here
+    - `template.rs`: contains template code
+- `utils/`: binary packages with convenience scripts structured using cargo workspaces
+- `.env.example`: example dotenv file
+
+### Cli
+- `cargo scaffold <day>`: prepare solution files for `day`
+- `cargo download <day>`: download input file for `day`
+- `cargo solve <day>`: run solution against input for `day`
+
+*Run `cargo build --workspace --release` once so scaffold and download packages get compiled, otherwise they will have to be compiled on first run.*
+
+### dotenv
+
+set `YEAR` to whichever year you are solving for and `TOKEN` to AoC session Cookie
+
+### FAQ
+
+#### How are your commits numbered in ascending order?
+[https://westling.dev/b/extremely-linear-git](https://westling.dev/b/extremely-linear-git)

src/lib.rs

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+pub mod template;

src/template.rs

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+/*
+ * This file contains template code.
+ * There is no need to edit this file unless you want to change template functionality.
+ */
+
+use std::env;
+use std::fs;
+
+pub const ANSI_ITALIC: &str = "\x1b[3m";
+pub const ANSI_BOLD: &str = "\x1b[1m";
+pub const ANSI_RESET: &str = "\x1b[0m";
+
+use std::fmt::Display;
+use std::time::Duration;
+use std::time::Instant;
+
+fn time_solution<T>(func: impl FnOnce(&str) -> Option<T>, input: &str) -> Option<(T, Duration)> {
+    let timer = Instant::now();
+    let result = func(input);
+    let elapsed = timer.elapsed();
+
+    result.map(|result| (result, elapsed))
+}
+
+pub fn print_result<T: Display>(func: impl FnOnce(&str) -> Option<T>, input: &str, part: u8) {
+    match time_solution(func, input) {
+        Some((result, elapsed)) => {
+            println!(
+                "{}Part {}{}: {} {}(elapsed: {:.2?}){}",
+                ANSI_BOLD, part, ANSI_RESET, result, ANSI_ITALIC, elapsed, ANSI_RESET
+            );
+        }
+        None => {
+            println!("{}Part {}{}: not solved.", ANSI_BOLD, part, ANSI_RESET)
+        }
+    }
+}
+
+#[macro_export]
+macro_rules! solution {
+    ($day:expr) => {
+        fn main() {
+            let input = aoc::template::read_file("inputs", $day);
+            aoc::template::print_result(part_one, &input, 1);
+            aoc::template::print_result(part_two, &input, 2);
+        }
+    };
+}
+
+#[must_use]
+pub fn read_file(folder: &str, day: u8) -> String {
+    let cwd = env::current_dir().unwrap();
+    let filepath = cwd.join("data").join(folder).join(format!("{day:02}.txt"));
+    let f = fs::read_to_string(filepath);
+    f.expect("could not open input file").trim().to_string()
+}

utils/download/Cargo.toml

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+[package]
+name = "download"
+description.workspace = true
+readme.workspace = true
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+repository.workspace = true
+
+[dependencies]
+reqwest = { version = "0.11.22", features = ["blocking"] }
+dotenvy = "0.15.6"
+pico-args = "0.5.0"

utils/download/src/main.rs

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+use dotenvy::dotenv;
+use reqwest::blocking::Client;
+use reqwest::header;
+use std::{env, fs::OpenOptions, io::Write, process};
+
+pub fn parse_args() -> Result<u8, pico_args::Error> {
+    let mut args = pico_args::Arguments::from_env();
+    args.free_from_str()
+}
+
+fn main() {
+    let day: u8 = match parse_args() {
+        Ok(day) => day,
+        Err(_) => {
+            eprintln!("Need to specify a day (as integer). example: `cargo download 7`");
+            process::exit(1);
+        }
+    };
+    dotenv().ok();
+
+    let day_padded = format!("{day:02}");
+    let token = env::var("TOKEN").expect("$TOKEN is not set");
+    let year = env::var("YEAR")
+        .expect("$YEAR is not set")
+        .parse::<u32>()
+        .expect("$YEAR must be a number");
+
+    let mut headers = header::HeaderMap::new();
+    let mut session_header = header::HeaderValue::from_str(format!("session={token}").as_str())
+        .expect("Error building cookie header");
+    session_header.set_sensitive(true);
+    headers.insert(header::COOKIE, session_header);
+
+    let client = Client::builder().default_headers(headers).build().unwrap();
+    let res = client
+        .get(format!("https://adventofcode.com/{year}/day/{day}/input"))
+        .send()
+        .unwrap()
+        .text()
+        .unwrap();
+
+    let input_path = format!("data/inputs/{day_padded}.txt");
+    let mut file = match OpenOptions::new()
+        .write(true)
+        .create(true)
+        .open(&input_path)
+    {
+        Ok(file) => file,
+        Err(e) => {
+            eprintln!("Failed to create module file: {e}");
+            process::exit(1);
+        }
+    };
+
+    match file.write_all(res.as_bytes()) {
+        Ok(_) => {
+            println!("Downloaded input file \"{}\"", &input_path);
+        }
+        Err(e) => {
+            eprintln!("Failed to write module contents: {e}");
+            process::exit(1);
+        }
+    }
+}

utils/scaffold/Cargo.toml

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+[package]
+name = "scaffold"
+description.workspace = true
+readme.workspace = true
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+repository.workspace = true
+
+[dependencies]
+reqwest = { version = "0.11.22", features = ["blocking"] }
+dotenvy = "0.15.6"
+pico-args = "0.5.0"

utils/scaffold/src/main.rs

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+/*
+ * This file contains template code.
+ * There is no need to edit this file unless you want to change template functionality.
+ */
+use std::{
+    fs::{File, OpenOptions},
+    io::Write,
+    process,
+};
+
+const MODULE_TEMPLATE: &str = r#"pub fn part_one(input: &str) -> Option<u32> {
+    None
+}
+
+pub fn part_two(input: &str) -> Option<u32> {
+    None
+}
+
+aoc::solution!(DAY);
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn test_part_one() {
+        assert_eq!(part_one(&aoc::template::read_file("examples", DAY)), None);
+    }
+    #[test]
+    fn test_part_two() {
+        assert_eq!(part_two(&aoc::template::read_file("examples", DAY)), None);
+    }
+}
+"#;
+
+pub fn parse_args() -> Result<u8, pico_args::Error> {
+    let mut args = pico_args::Arguments::from_env();
+    args.free_from_str()
+}
+
+fn safe_create_file(path: &str) -> Result<File, std::io::Error> {
+    OpenOptions::new().write(true).create_new(true).open(path)
+}
+
+fn create_file(path: &str) -> Result<File, std::io::Error> {
+    OpenOptions::new().write(true).create(true).open(path)
+}
+
+fn main() {
+    let day = match parse_args() {
+        Ok(day) => day,
+        Err(_) => {
+            eprintln!("Need to specify a day (as integer). example: `cargo scaffold 7`");
+            process::exit(1);
+        }
+    };
+
+    let day_padded = format!("{day:02}");
+
+    let input_path = format!("data/inputs/{day_padded}.txt");
+    let example_path = format!("data/examples/{day_padded}.txt");
+    let module_path = format!("src/bin/{day_padded}.rs");
+
+    let mut file = match safe_create_file(&module_path) {
+        Ok(file) => file,
+        Err(e) => {
+            eprintln!("Failed to create module file: {e}");
+            process::exit(1);
+        }
+    };
+
+    match file.write_all(MODULE_TEMPLATE.replace("DAY", &day.to_string()).as_bytes()) {
+        Ok(_) => {
+            println!("Created module file \"{}\"", &module_path);
+        }
+        Err(e) => {
+            eprintln!("Failed to write module contents: {e}");
+            process::exit(1);
+        }
+    }
+
+    match create_file(&input_path) {
+        Ok(_) => {
+            println!("Created empty input file \"{}\"", &input_path);
+        }
+        Err(e) => {
+            eprintln!("Failed to create input file: {e}");
+            process::exit(1);
+        }
+    }
+
+    match create_file(&example_path) {
+        Ok(_) => {
+            println!("Created empty example file \"{}\"", &example_path);
+        }
+        Err(e) => {
+            eprintln!("Failed to create example file: {e}");
+            process::exit(1);
+        }
+    }
+
+    println!("---");
+    println!("Type `cargo solve {}` to run your solution.", &day_padded);
+}