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use anyhow::{bail, Context, Result};
use std::{
env::set_current_dir,
fs::{self, create_dir},
io::ErrorKind,
path::Path,
};
use crate::embedded::EMBEDDED_FILES;
const CARGO_TOML: &[u8] = {
let cargo_toml = include_bytes!("../dev/Cargo.toml");
// Skip the first line (comment).
let mut start_ind = 0;
while cargo_toml[start_ind] != b'\n' {
start_ind += 1;
}
cargo_toml.split_at(start_ind + 1).1
};
pub fn init() -> 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")?;
fs::write("Cargo.toml", CARGO_TOML)
.context("Failed to create the file `rustlings/Cargo.toml`")?;
fs::write(".gitignore", GITIGNORE)
.context("Failed to create the file `rustlings/.gitignore`")?;
create_dir(".vscode").context("Failed to create the directory `rustlings/.vscode`")?;
fs::write(".vscode/extensions.json", VS_CODE_EXTENSIONS_JSON)
.context("Failed to create the file `rustlings/.vscode/extensions.json`")?;
println!("{POST_INIT_MSG}");
Ok(())
}
pub const GITIGNORE: &[u8] = b"Cargo.lock
.rustlings-state.txt
target
";
pub 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";
const POST_INIT_MSG: &str = "Done initialization!
Run `cd rustlings` to go into the generated directory.
Then run `rustlings` to get started.";
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