diff --git a/rustlings-macros/src/lib.rs b/rustlings-macros/src/lib.rs index fc2bcf14..4417a4f9 100644 --- a/rustlings-macros/src/lib.rs +++ b/rustlings-macros/src/lib.rs @@ -25,14 +25,28 @@ pub fn include_files(_: TokenStream) -> TokenStream { let solution_files = exercises .iter() .map(|exercise| format!("../solutions/{}/{}.rs", exercise.dir, exercise.name)); - let dirs = exercises.iter().map(|exercise| &exercise.dir); - let readmes = exercises + + let mut dirs = Vec::with_capacity(32); + let mut dir_inds = vec![0; exercises.len()]; + + for (exercise, dir_ind) in exercises.iter().zip(&mut dir_inds) { + // The directory is often the last one inserted. + if let Some(ind) = dirs.iter().rev().position(|dir| *dir == exercise.dir) { + *dir_ind = dirs.len() - 1 - ind; + continue; + } + + dirs.push(exercise.dir.as_str()); + *dir_ind = dirs.len() - 1; + } + + let readmes = dirs .iter() - .map(|exercise| format!("../exercises/{}/README.md", exercise.dir)); + .map(|dir| format!("../exercises/{dir}/README.md")); quote! { EmbeddedFiles { - exercise_files: &[#(ExerciseFiles { exercise: include_bytes!(#exercise_files), solution: include_bytes!(#solution_files) }),*], + exercise_files: &[#(ExerciseFiles { exercise: include_bytes!(#exercise_files), solution: include_bytes!(#solution_files), dir_ind: #dir_inds }),*], exercise_dirs: &[#(ExerciseDir { name: #dirs, readme: include_bytes!(#readmes) }),*] } } diff --git a/src/app_state.rs b/src/app_state.rs index 8cb3e466..492be345 100644 --- a/src/app_state.rs +++ b/src/app_state.rs @@ -193,12 +193,12 @@ impl AppState { Ok(()) } - pub fn set_current_exercise_ind(&mut self, ind: usize) -> Result<()> { - if ind >= self.exercises.len() { + pub fn set_current_exercise_ind(&mut self, exercise_ind: usize) -> Result<()> { + if exercise_ind >= self.exercises.len() { bail!(BAD_INDEX_ERR); } - self.current_exercise_ind = ind; + self.current_exercise_ind = exercise_ind; self.write() } @@ -215,8 +215,11 @@ impl AppState { self.write() } - pub fn set_pending(&mut self, ind: usize) -> Result<()> { - let exercise = self.exercises.get_mut(ind).context(BAD_INDEX_ERR)?; + pub fn set_pending(&mut self, exercise_ind: usize) -> Result<()> { + let exercise = self + .exercises + .get_mut(exercise_ind) + .context(BAD_INDEX_ERR)?; if exercise.done { exercise.done = false; @@ -229,16 +232,10 @@ impl AppState { // Official exercises: Dump the original file from the binary. // Third-party exercises: Reset the exercise file with `git stash`. - fn reset(&self, ind: usize, dir_name: Option<&str>, path: &str) -> Result<()> { + fn reset(&self, exercise_ind: usize, path: &str) -> Result<()> { if self.official_exercises { return EMBEDDED_FILES - .write_exercise_to_disk( - ind, - dir_name.context( - "Official exercises must be nested in the `exercises` directory", - )?, - path, - ) + .write_exercise_to_disk(exercise_ind, path) .with_context(|| format!("Failed to reset the exercise {path}")); } @@ -265,7 +262,7 @@ impl AppState { pub fn reset_current_exercise(&mut self) -> Result<&'static str> { self.set_pending(self.current_exercise_ind)?; let exercise = self.current_exercise(); - self.reset(self.current_exercise_ind, exercise.dir, exercise.path)?; + self.reset(self.current_exercise_ind, exercise.path)?; Ok(exercise.path) } @@ -277,7 +274,7 @@ impl AppState { self.set_pending(exercise_ind)?; let exercise = &self.exercises[exercise_ind]; - self.reset(exercise_ind, exercise.dir, exercise.path)?; + self.reset(exercise_ind, exercise.path)?; Ok(exercise.path) } @@ -315,18 +312,9 @@ impl AppState { let current_exercise = self.current_exercise(); if self.official_exercises { - let dir_name = current_exercise - .dir - .context("Official exercises must be nested in the `exercises` directory")?; - let solution_path = format!("solutions/{dir_name}/{}.rs", current_exercise.name); - - EMBEDDED_FILES.write_solution_to_disk( - self.current_exercise_ind, - dir_name, - &solution_path, - )?; - - Ok(Some(solution_path)) + EMBEDDED_FILES + .write_solution_to_disk(self.current_exercise_ind, current_exercise.name) + .map(Some) } else { let solution_path = if let Some(dir) = current_exercise.dir { format!("solutions/{dir}/{}.rs", current_exercise.name) diff --git a/src/embedded.rs b/src/embedded.rs index a84e332b..23c8d6e4 100644 --- a/src/embedded.rs +++ b/src/embedded.rs @@ -1,4 +1,4 @@ -use anyhow::{bail, Context, Error, Result}; +use anyhow::{Context, Error, Result}; use std::{ fs::{create_dir, create_dir_all, OpenOptions}, io::{self, Write}, @@ -34,6 +34,7 @@ impl WriteStrategy { struct ExerciseFiles { exercise: &'static [u8], solution: &'static [u8], + dir_ind: usize, } struct ExerciseDir { @@ -43,11 +44,10 @@ struct ExerciseDir { impl ExerciseDir { fn init_on_disk(&self) -> Result<()> { - let path_prefix = "exercises/"; - let readme_path_postfix = "/README.md"; - let mut dir_path = - String::with_capacity(path_prefix.len() + self.name.len() + readme_path_postfix.len()); - dir_path.push_str(path_prefix); + // 20 = 10 + 10 + // exercises/ + /README.md + let mut dir_path = String::with_capacity(20 + self.name.len()); + dir_path.push_str("exercises/"); dir_path.push_str(self.name); if let Err(e) = create_dir(&dir_path) { @@ -60,10 +60,9 @@ impl ExerciseDir { ); } - let readme_path = { - dir_path.push_str(readme_path_postfix); - dir_path - }; + let mut readme_path = dir_path; + readme_path.push_str("/README.md"); + WriteStrategy::Overwrite.write(&readme_path, self.readme)?; Ok(()) @@ -95,30 +94,71 @@ impl EmbeddedFiles { Ok(()) } - pub fn write_exercise_to_disk( - &self, - exercise_ind: usize, - dir_name: &str, - path: &str, - ) -> Result<()> { - let Some(dir) = self.exercise_dirs.iter().find(|dir| dir.name == dir_name) else { - bail!("`{dir_name}` not found in the embedded directories"); - }; + pub fn write_exercise_to_disk(&self, exercise_ind: usize, path: &str) -> Result<()> { + let exercise_files = &EMBEDDED_FILES.exercise_files[exercise_ind]; + let dir = &EMBEDDED_FILES.exercise_dirs[exercise_files.dir_ind]; dir.init_on_disk()?; - WriteStrategy::Overwrite.write(path, self.exercise_files[exercise_ind].exercise) + WriteStrategy::Overwrite.write(path, exercise_files.exercise) } + // Write the solution file to disk and return its path. pub fn write_solution_to_disk( &self, exercise_ind: usize, - dir_name: &str, - path: &str, - ) -> Result<()> { - let dir_path = format!("solutions/{dir_name}"); + exercise_name: &str, + ) -> Result { + let exercise_files = &EMBEDDED_FILES.exercise_files[exercise_ind]; + let dir = &EMBEDDED_FILES.exercise_dirs[exercise_files.dir_ind]; + + // 14 = 10 + 1 + 3 + // solutions/ + / + .rs + let mut dir_path = String::with_capacity(14 + dir.name.len() + exercise_name.len()); + dir_path.push_str("solutions/"); + dir_path.push_str(dir.name); create_dir_all(&dir_path) .with_context(|| format!("Failed to create the directory {dir_path}"))?; - WriteStrategy::Overwrite.write(path, self.exercise_files[exercise_ind].solution) + let mut solution_path = dir_path; + solution_path.push('/'); + solution_path.push_str(exercise_name); + solution_path.push_str(".rs"); + + WriteStrategy::Overwrite.write(&solution_path, exercise_files.solution)?; + + Ok(solution_path) + } +} + +#[cfg(test)] +mod tests { + use serde::Deserialize; + + use super::*; + + #[derive(Deserialize)] + struct ExerciseInfo { + dir: String, + } + + #[derive(Deserialize)] + struct InfoFile { + exercises: Vec, + } + + #[test] + fn dirs() { + let exercises = toml_edit::de::from_str::(include_str!("../info.toml")) + .expect("Failed to parse `info.toml`") + .exercises; + + assert_eq!(exercises.len(), EMBEDDED_FILES.exercise_files.len()); + + for (exercise, exercise_files) in exercises.iter().zip(EMBEDDED_FILES.exercise_files) { + assert_eq!( + exercise.dir, + EMBEDDED_FILES.exercise_dirs[exercise_files.dir_ind].name, + ); + } } }