2024-07-28 11:39:46 -04:00
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use anyhow::{bail, Context, Error, Result};
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use std::{
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env,
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fs::{self, File},
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io::{Read, StdoutLock, Write},
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path::Path,
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process::{Command, Stdio},
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thread,
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};
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2024-04-10 20:51:02 -04:00
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2024-04-24 19:56:01 -04:00
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use crate::{
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2024-04-29 19:41:08 -04:00
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clear_terminal,
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2024-08-01 09:23:54 -04:00
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cmd::CmdRunner,
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collections::hash_set_with_capacity,
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embedded::EMBEDDED_FILES,
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exercise::{Exercise, RunnableExercise},
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info_file::ExerciseInfo,
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};
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2024-04-13 23:13:27 -04:00
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const STATE_FILE_NAME: &str = ".rustlings-state.txt";
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const BAD_INDEX_ERR: &str = "The current exercise index is higher than the number of exercises";
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2024-04-12 14:06:56 -04:00
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#[must_use]
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pub enum ExercisesProgress {
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// All exercises are done.
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AllDone,
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// The current exercise failed and is still pending.
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CurrentPending,
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// A new exercise is now pending.
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NewPending,
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}
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2024-04-14 10:03:49 -04:00
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pub enum StateFileStatus {
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Read,
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NotRead,
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}
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2024-04-10 20:51:02 -04:00
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pub struct AppState {
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current_exercise_ind: usize,
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exercises: Vec<Exercise>,
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// Caches the number of done exercises to avoid iterating over all exercises every time.
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n_done: u16,
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final_message: String,
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// Preallocated buffer for reading and writing the state file.
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file_buf: Vec<u8>,
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official_exercises: bool,
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cmd_runner: CmdRunner,
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// Running in VS Code.
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vs_code: bool,
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}
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impl AppState {
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// Update the app state from the state file.
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fn update_from_file(&mut self) -> StateFileStatus {
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self.file_buf.clear();
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self.n_done = 0;
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if File::open(STATE_FILE_NAME)
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.and_then(|mut file| file.read_to_end(&mut self.file_buf))
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.is_err()
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{
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return StateFileStatus::NotRead;
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}
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// See `Self::write` for more information about the file format.
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let mut lines = self.file_buf.split(|c| *c == b'\n').skip(2);
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let Some(current_exercise_name) = lines.next() else {
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return StateFileStatus::NotRead;
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};
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if current_exercise_name.is_empty() || lines.next().is_none() {
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return StateFileStatus::NotRead;
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}
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2024-08-08 17:46:21 -04:00
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let mut done_exercises = hash_set_with_capacity(self.exercises.len());
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for done_exerise_name in lines {
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if done_exerise_name.is_empty() {
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break;
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}
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done_exercises.insert(done_exerise_name);
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}
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for (ind, exercise) in self.exercises.iter_mut().enumerate() {
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if done_exercises.contains(exercise.name.as_bytes()) {
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exercise.done = true;
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self.n_done += 1;
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}
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if exercise.name.as_bytes() == current_exercise_name {
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self.current_exercise_ind = ind;
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}
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}
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StateFileStatus::Read
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}
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2024-04-14 10:03:49 -04:00
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pub fn new(
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exercise_infos: Vec<ExerciseInfo>,
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final_message: String,
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) -> Result<(Self, StateFileStatus)> {
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2024-08-01 09:23:54 -04:00
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let cmd_runner = CmdRunner::build()?;
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2024-04-14 10:03:49 -04:00
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let exercises = exercise_infos
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.into_iter()
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.map(|exercise_info| {
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// Leaking to be able to borrow in the watch mode `Table`.
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// Leaking is not a problem because the `AppState` instance lives until
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// the end of the program.
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let path = exercise_info.path().leak();
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let name = exercise_info.name.leak();
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let dir = exercise_info.dir.map(|dir| &*dir.leak());
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2024-08-02 10:28:05 -04:00
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let hint = exercise_info.hint.leak().trim_ascii();
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Exercise {
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dir,
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name,
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path,
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test: exercise_info.test,
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strict_clippy: exercise_info.strict_clippy,
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hint,
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// Updated in `Self::update_from_file`.
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done: false,
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}
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})
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.collect::<Vec<_>>();
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2024-04-13 23:13:27 -04:00
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let mut slf = Self {
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current_exercise_ind: 0,
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exercises,
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n_done: 0,
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final_message,
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file_buf: Vec::with_capacity(2048),
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2024-04-18 06:41:17 -04:00
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official_exercises: !Path::new("info.toml").exists(),
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cmd_runner,
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vs_code: env::var_os("TERM_PROGRAM").is_some_and(|v| v == "vscode"),
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};
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2024-04-14 10:03:49 -04:00
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let state_file_status = slf.update_from_file();
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2024-04-27 11:31:51 -04:00
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Ok((slf, state_file_status))
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}
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#[inline]
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pub fn current_exercise_ind(&self) -> usize {
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self.current_exercise_ind
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}
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#[inline]
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pub fn exercises(&self) -> &[Exercise] {
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&self.exercises
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}
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#[inline]
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pub fn n_done(&self) -> u16 {
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self.n_done
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}
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#[inline]
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2024-04-13 19:15:43 -04:00
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pub fn current_exercise(&self) -> &Exercise {
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&self.exercises[self.current_exercise_ind]
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}
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2024-04-26 22:14:59 -04:00
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#[inline]
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2024-08-01 09:23:54 -04:00
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pub fn cmd_runner(&self) -> &CmdRunner {
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&self.cmd_runner
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2024-04-26 22:14:59 -04:00
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}
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2024-08-27 19:19:53 -04:00
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#[inline]
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pub fn vs_code(&self) -> bool {
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self.vs_code
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}
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2024-04-29 11:01:47 -04:00
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// Write the state file.
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// The file's format is very simple:
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// - The first line is a comment.
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// - The second line is an empty line.
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// - The third line is the name of the current exercise. It must end with `\n` even if there
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// are no done exercises.
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// - The fourth line is an empty line.
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// - All remaining lines are the names of done exercises.
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fn write(&mut self) -> Result<()> {
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self.file_buf.clear();
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self.file_buf
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.extend_from_slice(b"DON'T EDIT THIS FILE!\n\n");
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self.file_buf
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.extend_from_slice(self.current_exercise().name.as_bytes());
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self.file_buf.push(b'\n');
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for exercise in &self.exercises {
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if exercise.done {
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self.file_buf.push(b'\n');
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self.file_buf.extend_from_slice(exercise.name.as_bytes());
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}
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}
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fs::write(STATE_FILE_NAME, &self.file_buf)
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.with_context(|| format!("Failed to write the state file {STATE_FILE_NAME}"))?;
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Ok(())
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}
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2024-05-12 11:40:53 -04:00
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pub fn set_current_exercise_ind(&mut self, exercise_ind: usize) -> Result<()> {
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2024-05-13 11:06:11 -04:00
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if exercise_ind == self.current_exercise_ind {
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return Ok(());
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}
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2024-05-12 11:40:53 -04:00
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if exercise_ind >= self.exercises.len() {
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2024-04-10 20:51:02 -04:00
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bail!(BAD_INDEX_ERR);
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}
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2024-05-12 11:40:53 -04:00
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self.current_exercise_ind = exercise_ind;
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2024-04-10 20:51:02 -04:00
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2024-04-13 23:13:27 -04:00
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self.write()
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2024-04-10 20:51:02 -04:00
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}
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pub fn set_current_exercise_by_name(&mut self, name: &str) -> Result<()> {
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2024-04-13 19:15:43 -04:00
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// O(N) is fine since this method is used only once until the program exits.
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// Building a hashmap would have more overhead.
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self.current_exercise_ind = self
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2024-04-10 20:51:02 -04:00
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.exercises
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.iter()
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2024-04-13 19:15:43 -04:00
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.position(|exercise| exercise.name == name)
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2024-04-10 20:51:02 -04:00
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.with_context(|| format!("No exercise found for '{name}'!"))?;
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2024-04-13 23:13:27 -04:00
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self.write()
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2024-04-10 20:51:02 -04:00
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}
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2024-05-12 11:40:53 -04:00
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pub fn set_pending(&mut self, exercise_ind: usize) -> Result<()> {
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let exercise = self
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.exercises
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.get_mut(exercise_ind)
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.context(BAD_INDEX_ERR)?;
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2024-04-13 19:15:43 -04:00
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if exercise.done {
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exercise.done = false;
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2024-04-10 20:51:02 -04:00
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self.n_done -= 1;
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2024-04-13 23:13:27 -04:00
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self.write()?;
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2024-04-10 20:51:02 -04:00
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}
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Ok(())
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}
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2024-04-29 11:01:47 -04:00
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// Official exercises: Dump the original file from the binary.
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// Third-party exercises: Reset the exercise file with `git stash`.
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2024-05-12 11:40:53 -04:00
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fn reset(&self, exercise_ind: usize, path: &str) -> Result<()> {
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2024-04-18 06:41:17 -04:00
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if self.official_exercises {
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return EMBEDDED_FILES
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2024-05-12 11:40:53 -04:00
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.write_exercise_to_disk(exercise_ind, path)
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2024-04-18 06:41:17 -04:00
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.with_context(|| format!("Failed to reset the exercise {path}"));
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}
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let output = Command::new("git")
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.arg("stash")
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.arg("push")
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.arg("--")
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.arg(path)
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.stdin(Stdio::null())
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.stdout(Stdio::null())
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.output()
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.with_context(|| format!("Failed to run `git stash push -- {path}`"))?;
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if !output.status.success() {
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bail!(
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"`git stash push -- {path}` didn't run successfully: {}",
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String::from_utf8_lossy(&output.stderr),
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);
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}
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Ok(())
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}
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pub fn reset_current_exercise(&mut self) -> Result<&'static str> {
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self.set_pending(self.current_exercise_ind)?;
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2024-04-23 13:18:25 -04:00
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let exercise = self.current_exercise();
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2024-05-12 11:40:53 -04:00
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self.reset(self.current_exercise_ind, exercise.path)?;
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2024-04-18 06:41:17 -04:00
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2024-04-23 13:18:25 -04:00
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Ok(exercise.path)
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2024-04-18 06:41:17 -04:00
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}
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2024-08-25 14:29:54 -04:00
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// Reset the exercise by index and return its name.
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2024-04-18 06:41:17 -04:00
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pub fn reset_exercise_by_ind(&mut self, exercise_ind: usize) -> Result<&'static str> {
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if exercise_ind >= self.exercises.len() {
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bail!(BAD_INDEX_ERR);
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}
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self.set_pending(exercise_ind)?;
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2024-04-23 13:18:25 -04:00
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let exercise = &self.exercises[exercise_ind];
|
2024-05-12 11:40:53 -04:00
|
|
|
self.reset(exercise_ind, exercise.path)?;
|
2024-04-18 06:41:17 -04:00
|
|
|
|
2024-08-25 14:29:54 -04:00
|
|
|
Ok(exercise.name)
|
2024-04-18 06:41:17 -04:00
|
|
|
}
|
|
|
|
|
2024-04-29 11:01:47 -04:00
|
|
|
// Return the index of the next pending exercise or `None` if all exercises are done.
|
2024-04-12 12:57:04 -04:00
|
|
|
fn next_pending_exercise_ind(&self) -> Option<usize> {
|
2024-04-13 19:15:43 -04:00
|
|
|
if self.current_exercise_ind == self.exercises.len() - 1 {
|
2024-04-10 20:51:02 -04:00
|
|
|
// The last exercise is done.
|
|
|
|
// Search for exercises not done from the start.
|
2024-04-13 19:15:43 -04:00
|
|
|
return self.exercises[..self.current_exercise_ind]
|
2024-04-10 20:51:02 -04:00
|
|
|
.iter()
|
2024-04-13 19:15:43 -04:00
|
|
|
.position(|exercise| !exercise.done);
|
2024-04-10 20:51:02 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
// The done exercise isn't the last one.
|
|
|
|
// Search for a pending exercise after the current one and then from the start.
|
2024-04-13 19:15:43 -04:00
|
|
|
match self.exercises[self.current_exercise_ind + 1..]
|
2024-04-10 20:51:02 -04:00
|
|
|
.iter()
|
2024-04-13 19:15:43 -04:00
|
|
|
.position(|exercise| !exercise.done)
|
2024-04-10 20:51:02 -04:00
|
|
|
{
|
2024-04-13 19:15:43 -04:00
|
|
|
Some(ind) => Some(self.current_exercise_ind + 1 + ind),
|
|
|
|
None => self.exercises[..self.current_exercise_ind]
|
2024-04-10 20:51:02 -04:00
|
|
|
.iter()
|
2024-04-13 19:15:43 -04:00
|
|
|
.position(|exercise| !exercise.done),
|
2024-04-10 20:51:02 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2024-05-13 15:40:40 -04:00
|
|
|
/// Official exercises: Dump the solution file form the binary and return its path.
|
|
|
|
/// Third-party exercises: Check if a solution file exists and return its path in that case.
|
2024-04-23 20:52:30 -04:00
|
|
|
pub fn current_solution_path(&self) -> Result<Option<String>> {
|
2024-08-01 09:23:54 -04:00
|
|
|
if cfg!(debug_assertions) {
|
2024-04-23 20:52:30 -04:00
|
|
|
return Ok(None);
|
2024-04-10 20:51:02 -04:00
|
|
|
}
|
|
|
|
|
2024-04-23 20:52:30 -04:00
|
|
|
let current_exercise = self.current_exercise();
|
|
|
|
|
|
|
|
if self.official_exercises {
|
2024-05-12 11:40:53 -04:00
|
|
|
EMBEDDED_FILES
|
|
|
|
.write_solution_to_disk(self.current_exercise_ind, current_exercise.name)
|
|
|
|
.map(Some)
|
2024-04-23 20:52:30 -04:00
|
|
|
} else {
|
2024-08-27 19:10:19 -04:00
|
|
|
let sol_path = current_exercise.sol_path();
|
|
|
|
|
|
|
|
if Path::new(&sol_path).exists() {
|
|
|
|
return Ok(Some(sol_path));
|
2024-04-23 20:52:30 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
Ok(None)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2024-05-13 15:40:40 -04:00
|
|
|
/// Mark the current exercise as done and move on to the next pending exercise if one exists.
|
|
|
|
/// If all exercises are marked as done, run all of them to make sure that they are actually
|
|
|
|
/// done. If an exercise which is marked as done fails, mark it as pending and continue on it.
|
2024-08-25 17:53:50 -04:00
|
|
|
pub fn done_current_exercise(&mut self, stdout: &mut StdoutLock) -> Result<ExercisesProgress> {
|
2024-04-23 20:52:30 -04:00
|
|
|
let exercise = &mut self.exercises[self.current_exercise_ind];
|
|
|
|
if !exercise.done {
|
|
|
|
exercise.done = true;
|
|
|
|
self.n_done += 1;
|
2024-04-23 18:47:46 -04:00
|
|
|
}
|
|
|
|
|
2024-04-29 11:01:47 -04:00
|
|
|
if let Some(ind) = self.next_pending_exercise_ind() {
|
|
|
|
self.set_current_exercise_ind(ind)?;
|
2024-05-12 20:32:25 -04:00
|
|
|
return Ok(ExercisesProgress::NewPending);
|
2024-04-29 11:01:47 -04:00
|
|
|
}
|
2024-04-12 13:30:29 -04:00
|
|
|
|
2024-08-25 17:53:50 -04:00
|
|
|
stdout.write_all(RERUNNING_ALL_EXERCISES_MSG)?;
|
2024-04-12 12:57:04 -04:00
|
|
|
|
2024-07-28 11:39:46 -04:00
|
|
|
let n_exercises = self.exercises.len();
|
|
|
|
|
|
|
|
let pending_exercise_ind = thread::scope(|s| {
|
|
|
|
let handles = self
|
|
|
|
.exercises
|
|
|
|
.iter_mut()
|
|
|
|
.map(|exercise| {
|
|
|
|
s.spawn(|| {
|
2024-08-01 09:23:54 -04:00
|
|
|
let success = exercise.run_exercise(None, &self.cmd_runner)?;
|
2024-07-28 11:39:46 -04:00
|
|
|
exercise.done = success;
|
|
|
|
Ok::<_, Error>(success)
|
|
|
|
})
|
|
|
|
})
|
|
|
|
.collect::<Vec<_>>();
|
|
|
|
|
|
|
|
for (exercise_ind, handle) in handles.into_iter().enumerate() {
|
2024-08-25 17:53:50 -04:00
|
|
|
write!(stdout, "\rProgress: {exercise_ind}/{n_exercises}")?;
|
|
|
|
stdout.flush()?;
|
2024-07-28 11:39:46 -04:00
|
|
|
|
|
|
|
let success = handle.join().unwrap()?;
|
|
|
|
if !success {
|
2024-08-25 17:53:50 -04:00
|
|
|
stdout.write_all(b"\n\n")?;
|
2024-07-28 11:39:46 -04:00
|
|
|
return Ok(Some(exercise_ind));
|
|
|
|
}
|
2024-04-14 10:04:05 -04:00
|
|
|
}
|
2024-04-12 12:57:04 -04:00
|
|
|
|
2024-07-28 11:39:46 -04:00
|
|
|
Ok::<_, Error>(None)
|
|
|
|
})?;
|
|
|
|
|
|
|
|
if let Some(pending_exercise_ind) = pending_exercise_ind {
|
|
|
|
self.current_exercise_ind = pending_exercise_ind;
|
|
|
|
self.n_done = self
|
|
|
|
.exercises
|
|
|
|
.iter()
|
|
|
|
.filter(|exercise| exercise.done)
|
|
|
|
.count() as u16;
|
|
|
|
self.write()?;
|
|
|
|
return Ok(ExercisesProgress::NewPending);
|
2024-04-29 11:01:47 -04:00
|
|
|
}
|
2024-04-13 23:13:27 -04:00
|
|
|
|
2024-07-07 07:55:39 -04:00
|
|
|
// Write that the last exercise is done.
|
|
|
|
self.write()?;
|
|
|
|
|
2024-08-25 17:53:50 -04:00
|
|
|
clear_terminal(stdout)?;
|
|
|
|
stdout.write_all(FENISH_LINE.as_bytes())?;
|
2024-04-13 23:13:27 -04:00
|
|
|
|
2024-08-02 10:28:05 -04:00
|
|
|
let final_message = self.final_message.trim_ascii();
|
2024-04-29 11:01:47 -04:00
|
|
|
if !final_message.is_empty() {
|
2024-08-25 17:53:50 -04:00
|
|
|
stdout.write_all(final_message.as_bytes())?;
|
|
|
|
stdout.write_all(b"\n")?;
|
2024-04-13 23:13:27 -04:00
|
|
|
}
|
|
|
|
|
2024-04-29 11:01:47 -04:00
|
|
|
Ok(ExercisesProgress::AllDone)
|
2024-04-13 23:13:27 -04:00
|
|
|
}
|
2024-04-10 20:51:02 -04:00
|
|
|
}
|
2024-04-12 12:57:04 -04:00
|
|
|
|
|
|
|
const RERUNNING_ALL_EXERCISES_MSG: &[u8] = b"
|
|
|
|
All exercises seem to be done.
|
|
|
|
Recompiling and running all exercises to make sure that all of them are actually done.
|
|
|
|
";
|
2024-04-18 05:21:39 -04:00
|
|
|
|
|
|
|
const FENISH_LINE: &str = "+----------------------------------------------------+
|
|
|
|
| You made it to the Fe-nish line! |
|
|
|
|
+-------------------------- ------------------------+
|
|
|
|
\\/\x1b[31m
|
|
|
|
▒▒ ▒▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒▒ ▒▒
|
|
|
|
▒▒▒▒ ▒▒ ▒▒ ▒▒ ▒▒ ▒▒ ▒▒ ▒▒▒▒
|
|
|
|
▒▒▒▒ ▒▒ ▒▒ ▒▒ ▒▒ ▒▒ ▒▒▒▒
|
|
|
|
░░▒▒▒▒░░▒▒ ▒▒ ▒▒ ▒▒ ▒▒░░▒▒▒▒
|
|
|
|
▓▓▓▓▓▓▓▓ ▓▓ ▓▓██ ▓▓ ▓▓██ ▓▓ ▓▓▓▓▓▓▓▓
|
|
|
|
▒▒▒▒ ▒▒ ████ ▒▒ ████ ▒▒░░ ▒▒▒▒
|
|
|
|
▒▒ ▒▒▒▒▒▒ ▒▒▒▒▒▒ ▒▒▒▒▒▒ ▒▒
|
|
|
|
▒▒▒▒▒▒▒▒▒▒▓▓▓▓▓▓▒▒▒▒▒▒▒▒▓▓▓▓▓▓▒▒▒▒▒▒▒▒
|
|
|
|
▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒
|
|
|
|
▒▒▒▒▒▒▒▒▒▒██▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒
|
|
|
|
▒▒ ▒▒▒▒▒▒▒▒▒▒██████▒▒▒▒▒▒▒▒▒▒ ▒▒
|
|
|
|
▒▒ ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ ▒▒
|
|
|
|
▒▒ ▒▒ ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ ▒▒ ▒▒
|
|
|
|
▒▒ ▒▒ ▒▒ ▒▒ ▒▒ ▒▒
|
|
|
|
▒▒ ▒▒ ▒▒ ▒▒\x1b[0m
|
|
|
|
|
|
|
|
";
|
2024-04-29 20:14:20 -04:00
|
|
|
|
|
|
|
#[cfg(test)]
|
|
|
|
mod tests {
|
|
|
|
use super::*;
|
|
|
|
|
|
|
|
fn dummy_exercise() -> Exercise {
|
|
|
|
Exercise {
|
|
|
|
dir: None,
|
|
|
|
name: "0",
|
|
|
|
path: "exercises/0.rs",
|
|
|
|
test: false,
|
|
|
|
strict_clippy: false,
|
2024-08-02 10:28:05 -04:00
|
|
|
hint: "",
|
2024-04-29 20:14:20 -04:00
|
|
|
done: false,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
fn next_pending_exercise() {
|
|
|
|
let mut app_state = AppState {
|
|
|
|
current_exercise_ind: 0,
|
|
|
|
exercises: vec![dummy_exercise(), dummy_exercise(), dummy_exercise()],
|
|
|
|
n_done: 0,
|
|
|
|
final_message: String::new(),
|
|
|
|
file_buf: Vec::new(),
|
|
|
|
official_exercises: true,
|
2024-08-01 09:23:54 -04:00
|
|
|
cmd_runner: CmdRunner::build().unwrap(),
|
2024-08-27 19:19:53 -04:00
|
|
|
vs_code: false,
|
2024-04-29 20:14:20 -04:00
|
|
|
};
|
|
|
|
|
|
|
|
let mut assert = |done: [bool; 3], expected: [Option<usize>; 3]| {
|
|
|
|
for (exercise, done) in app_state.exercises.iter_mut().zip(done) {
|
|
|
|
exercise.done = done;
|
|
|
|
}
|
|
|
|
for (ind, expected) in expected.into_iter().enumerate() {
|
|
|
|
app_state.current_exercise_ind = ind;
|
|
|
|
assert_eq!(
|
|
|
|
app_state.next_pending_exercise_ind(),
|
|
|
|
expected,
|
|
|
|
"done={done:?}, ind={ind}",
|
|
|
|
);
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
assert([true, true, true], [None, None, None]);
|
|
|
|
assert([false, false, false], [Some(1), Some(2), Some(0)]);
|
|
|
|
assert([false, true, true], [None, Some(0), Some(0)]);
|
|
|
|
assert([true, false, true], [Some(1), None, Some(1)]);
|
|
|
|
assert([true, true, false], [Some(2), Some(2), None]);
|
|
|
|
assert([true, false, false], [Some(1), Some(2), Some(1)]);
|
|
|
|
assert([false, true, false], [Some(2), Some(2), Some(0)]);
|
|
|
|
assert([false, false, true], [Some(1), Some(0), Some(0)]);
|
|
|
|
}
|
|
|
|
}
|