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Document init

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This commit is contained in:
mo8it 2024-05-14 00:35:12 +02:00
parent a67e63cce0
commit 700605ff35
1 changed files with 13 additions and 11 deletions
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24
src/init.rs
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@ -11,8 +11,11 @@ use std::{
use crate::{cargo_toml::updated_cargo_toml, embedded::EMBEDDED_FILES, info_file::InfoFile};
pub fn init() -> Result<()> {
if Path::new("exercises").is_dir() && Path::new("Cargo.toml").is_file() {
bail!(PROBABLY_IN_RUSTLINGS_DIR_ERR);
// Prevent initialization in a directory that contains the file `Cargo.toml`.
// This can mean that Rustlings was already initialized in this directory.
// Otherwise, this can cause problems with Cargo workspaces.
if Path::new("Cargo.toml").exists() {
bail!(CARGO_TOML_EXISTS_ERR);
}
let rustlings_path = Path::new("rustlings");
@ -24,7 +27,7 @@ pub fn init() -> Result<()> {
}
set_current_dir("rustlings")
.context("Failed to change the current directory to `rustlings`")?;
.context("Failed to change the current directory to `rustlings/`")?;
let info_file = InfoFile::parse()?;
EMBEDDED_FILES
@ -37,9 +40,10 @@ pub fn init() -> Result<()> {
.as_bytes()
.iter()
.position(|c| *c == b'\n')
.context("The embedded `Cargo.toml` is empty or contains only one line.")?;
let current_cargo_toml =
&current_cargo_toml[(newline_ind + 1).min(current_cargo_toml.len() - 1)..];
.context("The embedded `Cargo.toml` is empty or contains only one line")?;
let current_cargo_toml = current_cargo_toml
.get(newline_ind + 1..)
.context("The embedded `Cargo.toml` contains only one line")?;
let updated_cargo_toml = updated_cargo_toml(&info_file.exercises, current_cargo_toml, b"")
.context("Failed to generate `Cargo.toml`")?;
fs::write("Cargo.toml", updated_cargo_toml)
@ -77,12 +81,10 @@ 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.
const CARGO_TOML_EXISTS_ERR: &str = "The current directory contains the file `Cargo.toml`.
If you didn't already initialize Rustlings, please initialize it in another directory.";
If you already initialized Rustlings, run the command `rustlings` for instructions on getting started with the exercises.
Otherwise, please run `rustlings init` again in another directory.";
const RUSTLINGS_DIR_ALREADY_EXISTS_ERR: &str =
"A directory with the name `rustlings` already exists in the current directory.