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|
use anyhow::{bail, Context, Result};
use std::{
env::set_current_dir,
fs::{create_dir, OpenOptions},
io::{self, ErrorKind, Write},
path::Path,
};
use crate::{embedded::EMBEDDED_FILES, info_file::ExerciseInfo, trust::trust_current_dir};
fn create_cargo_toml(exercise_infos: &[ExerciseInfo]) -> io::Result<()> {
let mut cargo_toml = Vec::with_capacity(1 << 13);
cargo_toml.extend_from_slice(b"bin = [\n");
for exercise_info in exercise_infos {
cargo_toml.extend_from_slice(b" { name = \"");
cargo_toml.extend_from_slice(exercise_info.name.as_bytes());
cargo_toml.extend_from_slice(b"\", path = \"exercises/");
if let Some(dir) = &exercise_info.dir {
cargo_toml.extend_from_slice(dir.as_bytes());
cargo_toml.push(b'/');
}
cargo_toml.extend_from_slice(exercise_info.name.as_bytes());
cargo_toml.extend_from_slice(b".rs\" },\n");
}
cargo_toml.extend_from_slice(
br#"]
[package]
name = "rustlings"
edition = "2021"
publish = false
"#,
);
OpenOptions::new()
.create_new(true)
.write(true)
.open("Cargo.toml")?
.write_all(&cargo_toml)
}
fn create_gitignore() -> io::Result<()> {
OpenOptions::new()
.create_new(true)
.write(true)
.open(".gitignore")?
.write_all(GITIGNORE)
}
fn create_vscode_dir() -> Result<()> {
create_dir(".vscode").context("Failed to create the directory `.vscode`")?;
OpenOptions::new()
.create_new(true)
.write(true)
.open(".vscode/extensions.json")?
.write_all(VS_CODE_EXTENSIONS_JSON)?;
Ok(())
}
pub fn init(exercise_infos: &[ExerciseInfo]) -> Result<()> {
if Path::new("exercises").is_dir() && Path::new("Cargo.toml").is_file() {
bail!(PROBABLY_IN_RUSTLINGS_DIR_ERR);
}
let rustlings_path = Path::new("rustlings");
if let Err(e) = create_dir(rustlings_path) {
if e.kind() == ErrorKind::AlreadyExists {
bail!(RUSTLINGS_DIR_ALREADY_EXISTS_ERR);
}
return Err(e.into());
}
set_current_dir("rustlings")
.context("Failed to change the current directory to `rustlings`")?;
EMBEDDED_FILES
.init_exercises_dir()
.context("Failed to initialize the `rustlings/exercises` directory")?;
create_cargo_toml(exercise_infos)
.context("Failed to create the file `rustlings/Cargo.toml`")?;
create_gitignore().context("Failed to create the file `rustlings/.gitignore`")?;
create_vscode_dir().context("Failed to create the file `rustlings/.vscode/extensions.json`")?;
trust_current_dir()?;
Ok(())
}
const GITIGNORE: &[u8] = b"/target
/.rustlings-state.txt
";
const VS_CODE_EXTENSIONS_JSON: &[u8] = br#"{"recommendations":["rust-lang.rust-analyzer"]}"#;
const PROBABLY_IN_RUSTLINGS_DIR_ERR: &str =
"A directory with the name `exercises` and a file with the name `Cargo.toml` already exist
in the current directory. It looks like Rustlings was already initialized here.
Run `rustlings` for instructions on getting started with the exercises.
If you didn't already initialize Rustlings, please initialize it in another directory.";
const RUSTLINGS_DIR_ALREADY_EXISTS_ERR: &str =
"A directory with the name `rustlings` already exists in the current directory.
You probably already initialized Rustlings.
Run `cd rustlings`
Then run `rustlings` again";
|
