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First PR review changes

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This commit is contained in:
mo8it 2024-10-10 19:43:35 +02:00
parent d3f819f86f
commit 685e069c58
5 changed files with 171 additions and 189 deletions
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318
src/app_state.rs
View file

@ -1,16 +1,18 @@
use anyhow::{bail, Context, Result};
use anyhow::{bail, Context, Error, Result};
use crossterm::{
queue,
style::{Print, ResetColor, SetForegroundColor},
terminal,
style::{ResetColor, SetForegroundColor},
terminal, QueueableCommand,
};
use std::{
env,
fs::{File, OpenOptions},
io::{self, Read, Seek, StdoutLock, Write},
io::{Read, Seek, StdoutLock, Write},
path::{Path, MAIN_SEPARATOR_STR},
process::{Command, Stdio},
sync::{atomic::AtomicUsize, mpsc, Arc},
sync::{
atomic::{AtomicUsize, Ordering::Relaxed},
mpsc,
},
thread,
};
@ -42,11 +44,17 @@ pub enum StateFileStatus {
NotRead,
}
#[derive(Clone, Copy, PartialEq)]
enum AllExercisesResult {
enum ExerciseCheckProgress {
Checking,
Done,
Pending,
Error,
}
#[derive(Clone, Copy)]
enum ExerciseCheckResult {
Done,
Pending,
Success,
Failed,
Error,
}
@ -280,7 +288,7 @@ impl AppState {
}
// Set the status of an exercise without saving. Returns `true` if the
// status actually changed (and thus needs saving later)
// status actually changed (and thus needs saving later).
pub fn set_status(&mut self, exercise_ind: usize, done: bool) -> Result<bool> {
let exercise = self
.exercises
@ -288,23 +296,25 @@ impl AppState {
.context(BAD_INDEX_ERR)?;
if exercise.done == done {
Ok(false)
} else {
exercise.done = done;
if done {
self.n_done += 1;
} else {
self.n_done -= 1;
}
Ok(true)
return Ok(false);
}
exercise.done = done;
if done {
self.n_done += 1;
} else {
self.n_done -= 1;
}
Ok(true)
}
// Set the status of an exercise to "pending" and save
// Set the status of an exercise to "pending" and save.
pub fn set_pending(&mut self, exercise_ind: usize) -> Result<()> {
if self.set_status(exercise_ind, false)? {
self.write()?;
}
Ok(())
}
@ -403,173 +413,154 @@ impl AppState {
}
// Return the exercise index of the first pending exercise found.
pub fn check_all_exercises(
&mut self,
stdout: &mut StdoutLock,
final_check: bool,
) -> Result<Option<usize>> {
if !final_check {
stdout.write_all(INTERMEDIATE_CHECK_MSG)?;
} else {
stdout.write_all(FINAL_CHECK_MSG)?;
}
let n_exercises = self.exercises.len();
pub fn check_all_exercises(&mut self, stdout: &mut StdoutLock) -> Result<Option<usize>> {
stdout.write_all("Checking all exercises…\n".as_bytes())?;
let n_exercises = self.exercises.len() as u16;
let next_exercise_ind = AtomicUsize::new(0);
let term_width = terminal::size()
.context("Failed to get the terminal size")?
.0;
let (mut checked_count, mut results) = thread::scope(|s| {
let (tx, rx) = mpsc::channel();
let exercise_ind = Arc::new(AtomicUsize::default());
let mut results = vec![ExerciseCheckResult::Error; self.exercises.len()];
let mut done = 0;
let mut pending = 0;
let num_core = thread::available_parallelism()
thread::scope(|s| {
let mut checking = 0;
let (exercise_result_sender, exercise_result_receiver) = mpsc::channel();
let n_threads = thread::available_parallelism()
.map_or(DEFAULT_CHECK_PARALLELISM, |count| count.get());
(0..num_core).for_each(|_| {
let tx = tx.clone();
let exercise_ind = exercise_ind.clone();
let this = &self;
let _ = thread::Builder::new().spawn_scoped(s, move || {
loop {
let exercise_ind =
exercise_ind.fetch_add(1, std::sync::atomic::Ordering::AcqRel);
let Some(exercise) = this.exercises.get(exercise_ind) else {
// No more exercises
for _ in 0..n_threads {
let exercise_result_sender = exercise_result_sender.clone();
let next_exercise_ind = &next_exercise_ind;
let slf = &self;
thread::Builder::new()
.spawn_scoped(s, move || loop {
let exercise_ind = next_exercise_ind.fetch_add(1, Relaxed);
let Some(exercise) = slf.exercises.get(exercise_ind) else {
// No more exercises.
break;
};
// Notify the progress bar that this exercise is pending
if tx.send((exercise_ind, None)).is_err() {
// Notify the progress bar that this exercise is pending.
if exercise_result_sender
.send((exercise_ind, ExerciseCheckProgress::Checking))
.is_err()
{
break;
};
let result = exercise.run_exercise(None, &this.cmd_runner);
let success = exercise.run_exercise(None, &slf.cmd_runner);
let result = match success {
Ok(true) => ExerciseCheckProgress::Done,
Ok(false) => ExerciseCheckProgress::Pending,
Err(_) => ExerciseCheckProgress::Error,
};
// Notify the progress bar that this exercise is done
if tx.send((exercise_ind, Some(result))).is_err() {
// Notify the progress bar that this exercise is done.
if exercise_result_sender.send((exercise_ind, result)).is_err() {
break;
}
}
});
});
})
.context("Failed to spawn a thread to check all exercises")?;
}
// Drop this `tx`, since the `rx` loop will not stop while there is
// at least one tx alive (i.e. we want the loop to block only while
// there are `tx` clones, i.e. threads)
drop(tx);
// Drop this sender to detect when the last thread is done.
drop(exercise_result_sender);
// Print the legend
queue!(
stdout,
Print("Color legend: "),
SetForegroundColor(term::PROGRESS_FAILED_COLOR),
Print("Failure"),
ResetColor,
Print(" - "),
SetForegroundColor(term::PROGRESS_SUCCESS_COLOR),
Print("Success"),
ResetColor,
Print(" - "),
SetForegroundColor(term::PROGRESS_PENDING_COLOR),
Print("Checking"),
ResetColor,
Print("\n"),
)
.unwrap();
// We expect at least a few "pending" notifications shortly, so don't
// bother printing the initial state of the progress bar and flushing
// stdout
// Print the legend.
stdout.write_all(b"Color legend: ")?;
stdout.queue(SetForegroundColor(term::PROGRESS_FAILED_COLOR))?;
stdout.write_all(b"Pending")?;
stdout.queue(ResetColor)?;
stdout.write_all(b" - ")?;
stdout.queue(SetForegroundColor(term::PROGRESS_SUCCESS_COLOR))?;
stdout.write_all(b"Done")?;
stdout.queue(ResetColor)?;
stdout.write_all(b" - ")?;
stdout.queue(SetForegroundColor(term::PROGRESS_PENDING_COLOR))?;
stdout.write_all(b"Checking")?;
stdout.queue(ResetColor)?;
stdout.write_all(b"\n")?;
let line_width = terminal::size().unwrap().0;
let mut results = vec![AllExercisesResult::Pending; n_exercises];
let mut pending = 0;
let mut success = 0;
let mut failed = 0;
while let Ok((exercise_ind, result)) = rx.recv() {
while let Ok((exercise_ind, result)) = exercise_result_receiver.recv() {
match result {
None => {
ExerciseCheckProgress::Checking => checking += 1,
ExerciseCheckProgress::Done => {
results[exercise_ind] = ExerciseCheckResult::Done;
checking -= 1;
done += 1;
}
ExerciseCheckProgress::Pending => {
results[exercise_ind] = ExerciseCheckResult::Pending;
checking -= 1;
pending += 1;
}
Some(Err(_)) => {
results[exercise_ind] = AllExercisesResult::Error;
}
Some(Ok(true)) => {
results[exercise_ind] = AllExercisesResult::Success;
pending -= 1;
success += 1;
}
Some(Ok(false)) => {
results[exercise_ind] = AllExercisesResult::Failed;
pending -= 1;
failed += 1;
}
ExerciseCheckProgress::Error => checking -= 1,
}
write!(stdout, "\r").unwrap();
stdout.write_all(b"\r")?;
progress_bar_with_success(
stdout,
checking,
pending,
failed,
success,
n_exercises as u16,
line_width,
)
.unwrap();
done,
n_exercises,
term_width,
)?;
stdout.flush()?;
}
Ok::<_, io::Error>((success, results))
Ok::<_, Error>(())
})?;
// If we got an error while checking all exercises in parallel,
// it could be because we exceeded the limit of open file descriptors.
// Therefore, re-try those one at a time (i.e. sequentially).
results
.iter_mut()
.enumerate()
.filter(|(_, result)| {
**result == AllExercisesResult::Pending || **result == AllExercisesResult::Error
})
.try_for_each(|(exercise_ind, result)| {
let exercise = self.exercises.get(exercise_ind).context(BAD_INDEX_ERR)?;
*result = match exercise
.run_exercise(None, &self.cmd_runner)
.context("Sequential retry")
{
Ok(true) => AllExercisesResult::Success,
Ok(false) => AllExercisesResult::Failed,
Err(err) => bail!(err),
};
checked_count += 1;
write!(stdout, "\rProgress: {checked_count}/{n_exercises}")?;
stdout.flush()?;
Ok(())
})?;
let mut first_pending_exercise_ind = None;
for (exercise_ind, result) in results.into_iter().enumerate() {
match result {
ExerciseCheckResult::Done => {
self.set_status(exercise_ind, true)?;
}
ExerciseCheckResult::Pending => {
self.set_status(exercise_ind, false)?;
if first_pending_exercise_ind.is_none() {
first_pending_exercise_ind = Some(exercise_ind);
}
}
ExerciseCheckResult::Error => {
// If we got an error while checking all exercises in parallel,
// it could be because we exceeded the limit of open file descriptors.
// Therefore, try running exercises with errors sequentially.
let exercise = &self.exercises[exercise_ind];
let success = exercise.run_exercise(None, &self.cmd_runner)?;
if success {
done += 1;
} else {
pending += 1;
if first_pending_exercise_ind.is_none() {
first_pending_exercise_ind = Some(exercise_ind);
}
}
self.set_status(exercise_ind, success)?;
// Update the state of each exercise and return the first that failed
let first_fail = results
.iter()
.enumerate()
.filter_map(|(exercise_ind, result)| {
match result {
AllExercisesResult::Success => self
.set_status(exercise_ind, true)
.map_or_else(|err| Some(Err(err)), |_| None),
AllExercisesResult::Failed => self
.set_status(exercise_ind, false)
.map_or_else(|err| Some(Err(err)), |_| Some(Ok(exercise_ind))),
// The sequential check done earlier will have converted all
// exercises to Success/Failed, or bailed, so those are unreachable
AllExercisesResult::Pending | AllExercisesResult::Error => unreachable!(),
stdout.write_all(b"\r")?;
progress_bar_with_success(
stdout,
u16::from(pending + done < n_exercises),
pending,
done,
n_exercises,
term_width,
)?;
stdout.flush()?;
}
})
.try_fold(None::<usize>, |current_min, index| {
match (current_min, index) {
(_, Err(err)) => Err(err),
(None, Ok(index)) => Ok(Some(index)),
(Some(current_min), Ok(index)) => Ok(Some(current_min.min(index))),
}
})?;
}
}
self.write()?;
stdout.write_all(b"\n\n")?;
Ok(first_fail)
Ok(first_pending_exercise_ind)
}
/// Mark the current exercise as done and move on to the next pending exercise if one exists.
@ -596,18 +587,12 @@ impl AppState {
stdout.write_all(b"\n")?;
}
if let Some(pending_exercise_ind) = self.check_all_exercises(stdout, true)? {
stdout.write_all(b"\n\n")?;
self.current_exercise_ind = pending_exercise_ind;
self.exercises[pending_exercise_ind].done = false;
if let Some(first_pending_exercise_ind) = self.check_all_exercises(stdout)? {
self.set_current_exercise_ind(first_pending_exercise_ind)?;
return Ok(ExercisesProgress::NewPending);
}
// Write that the last exercise is done.
self.write()?;
self.render_final_message(stdout)?;
Ok(ExercisesProgress::AllDone)
@ -629,11 +614,6 @@ impl AppState {
const BAD_INDEX_ERR: &str = "The current exercise index is higher than the number of exercises";
const STATE_FILE_HEADER: &[u8] = b"DON'T EDIT THIS FILE!\n\n";
const INTERMEDIATE_CHECK_MSG: &[u8] = b"Checking all exercises
";
const FINAL_CHECK_MSG: &[u8] = b"All exercises seem to be done.
Recompiling and running all exercises to make sure that all of them are actually done.
";
const FENISH_LINE: &str = "+----------------------------------------------------+
| You made it to the Fe-nish line! |
+-------------------------- ------------------------+

3
src/main.rs
View file

@ -146,7 +146,7 @@ fn main() -> Result<()> {
}
Some(Subcommands::RunAll) => {
let mut stdout = io::stdout().lock();
if let Some(first_fail) = app_state.check_all_exercises(&mut stdout, false)? {
if let Some(first_fail) = app_state.check_all_exercises(&mut stdout)? {
let pending = app_state
.exercises()
.iter()
@ -156,7 +156,6 @@ fn main() -> Result<()> {
app_state.set_current_exercise_ind(first_fail)?;
}
stdout
.queue(Print("\n"))?
.queue(SetForegroundColor(Color::Red))?
.queue(Print(format!("{pending}")))?
.queue(ResetColor)?;

19
src/term.rs
View file

@ -89,34 +89,35 @@ impl<'a> CountedWrite<'a> for StdoutLock<'a> {
}
}
/// Simple terminal progress bar
/// Simple terminal progress bar.
pub fn progress_bar<'a>(
writer: &mut impl CountedWrite<'a>,
progress: u16,
total: u16,
line_width: u16,
term_width: u16,
) -> io::Result<()> {
progress_bar_with_success(writer, 0, 0, progress, total, line_width)
progress_bar_with_success(writer, 0, 0, progress, total, term_width)
}
/// Terminal progress bar with three states (pending + failed + success)
/// Terminal progress bar with three states (pending + failed + success).
pub fn progress_bar_with_success<'a>(
writer: &mut impl CountedWrite<'a>,
pending: u16,
failed: u16,
success: u16,
total: u16,
line_width: u16,
term_width: u16,
) -> io::Result<()> {
debug_assert!(total < 1000);
debug_assert!((pending + failed + success) <= total);
debug_assert!(pending + failed + success <= total);
const PREFIX: &[u8] = b"Progress: [";
const PREFIX_WIDTH: u16 = PREFIX.len() as u16;
const POSTFIX_WIDTH: u16 = "] xxx/xxx".len() as u16;
const WRAPPER_WIDTH: u16 = PREFIX_WIDTH + POSTFIX_WIDTH;
const MIN_LINE_WIDTH: u16 = WRAPPER_WIDTH + 4;
const MIN_TERM_WIDTH: u16 = WRAPPER_WIDTH + 4;
if line_width < MIN_LINE_WIDTH {
if term_width < MIN_TERM_WIDTH {
writer.write_ascii(b"Progress: ")?;
// Integers are in ASCII.
return writer.write_ascii(format!("{}/{total}", failed + success).as_bytes());
@ -125,7 +126,7 @@ pub fn progress_bar_with_success<'a>(
let stdout = writer.stdout();
stdout.write_all(PREFIX)?;
let width = line_width - WRAPPER_WIDTH;
let width = term_width - WRAPPER_WIDTH;
let mut failed_end = (width * failed) / total;
let mut success_end = (width * (failed + success)) / total;
let mut pending_end = (width * (failed + success + pending)) / total;

2
src/watch.rs
View file

@ -108,7 +108,7 @@ fn run_watch(
{
ExercisesProgress::AllDone => break,
ExercisesProgress::NewPending => watch_state.run_current_exercise(&mut stdout)?,
ExercisesProgress::CurrentPending => (),
ExercisesProgress::CurrentPending => watch_state.render(&mut stdout)?,
},
WatchEvent::Input(InputEvent::Reset) => watch_state.reset_exercise(&mut stdout)?,
WatchEvent::Input(InputEvent::Quit) => {

18
src/watch/state.rs
View file

@ -157,8 +157,9 @@ impl<'a> WatchState<'a> {
/// Move on to the next exercise if the current one is done.
pub fn next_exercise(&mut self, stdout: &mut StdoutLock) -> Result<ExercisesProgress> {
if self.done_status == DoneStatus::Pending {
return Ok(ExercisesProgress::CurrentPending);
match self.done_status {
DoneStatus::DoneWithSolution(_) | DoneStatus::DoneWithoutSolution => (),
DoneStatus::Pending => return Ok(ExercisesProgress::CurrentPending),
}
self.app_state.done_current_exercise::<true>(stdout)
@ -282,14 +283,15 @@ impl<'a> WatchState<'a> {
pub fn check_all_exercises(&mut self, stdout: &mut StdoutLock) -> Result<ExercisesProgress> {
stdout.write_all(b"\n")?;
if let Some(first_fail) = self.app_state.check_all_exercises(stdout, false)? {
// Only change exercise if the current one is done...
if let Some(first_pending_exercise_ind) = self.app_state.check_all_exercises(stdout)? {
// Only change exercise if the current one is done.
if self.app_state.current_exercise().done {
self.app_state.set_current_exercise_ind(first_fail)?;
self.app_state
.set_current_exercise_ind(first_pending_exercise_ind)?;
Ok(ExercisesProgress::NewPending)
} else {
Ok(ExercisesProgress::CurrentPending)
}
// ...but always pretend it's a "new" anyway because that refreshes
// the display
Ok(ExercisesProgress::NewPending)
} else {
self.app_state.render_final_message(stdout)?;
Ok(ExercisesProgress::AllDone)