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use anyhow::{bail, Context, Result};
use std::fs;
use crate::{
info_file::{ExerciseInfo, InfoFile},
DEVELOPING_OFFIFICAL_RUSTLINGS,
};
pub fn bins_start_end_ind(cargo_toml: &str) -> Result<(usize, usize)> {
let start_ind = cargo_toml
.find("bin = [")
.context("Failed to find the start of the `bin` list (`bin = [`)")?
+ 7;
let end_ind = start_ind
+ cargo_toml
.get(start_ind..)
.and_then(|slice| slice.as_bytes().iter().position(|c| *c == b']'))
.context("Failed to find the end of the `bin` list (`]`)")?;
Ok((start_ind, end_ind))
}
pub fn append_bins(
buf: &mut Vec<u8>,
exercise_infos: &[ExerciseInfo],
exercise_path_prefix: &[u8],
) {
buf.push(b'\n');
for exercise_info in exercise_infos {
buf.extend_from_slice(b" { name = \"");
buf.extend_from_slice(exercise_info.name.as_bytes());
buf.extend_from_slice(b"\", path = \"");
buf.extend_from_slice(exercise_path_prefix);
buf.extend_from_slice(b"exercises/");
if let Some(dir) = &exercise_info.dir {
buf.extend_from_slice(dir.as_bytes());
buf.push(b'/');
}
buf.extend_from_slice(exercise_info.name.as_bytes());
buf.extend_from_slice(b".rs\" },\n");
}
}
fn check_cargo_toml(
exercise_infos: &[ExerciseInfo],
current_cargo_toml: &str,
exercise_path_prefix: &[u8],
) -> Result<()> {
let (bins_start_ind, bins_end_ind) = bins_start_end_ind(current_cargo_toml)?;
let old_bins = ¤t_cargo_toml.as_bytes()[bins_start_ind..bins_end_ind];
let mut new_bins = Vec::with_capacity(1 << 13);
append_bins(&mut new_bins, exercise_infos, exercise_path_prefix);
if old_bins != new_bins {
bail!("`Cargo.toml` is outdated. Run `rustlings dev update` to update it");
}
Ok(())
}
pub fn check() -> Result<()> {
let info_file = InfoFile::parse()?;
// TODO: Add checks
if DEVELOPING_OFFIFICAL_RUSTLINGS {
check_cargo_toml(
&info_file.exercises,
include_str!("../../dev/Cargo.toml"),
b"../",
)
.context("The file `dev/Cargo.toml` is outdated. Please run `cargo run -- dev update` to update it")?;
} else {
let current_cargo_toml =
fs::read_to_string("Cargo.toml").context("Failed to read the file `Cargo.toml`")?;
check_cargo_toml(&info_file.exercises, ¤t_cargo_toml, b"").context(
"The file `Cargo.toml` is outdated. Please run `rustlings dev update` to update it",
)?;
}
println!("\nEverything looks fine!");
Ok(())
}
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