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Optimize the notify event handler

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This commit is contained in:
mo8it 2024-04-25 14:44:12 +02:00
parent 88f27a5377
commit 14fe248b4b
3 changed files with 22 additions and 13 deletions
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8
src/main.rs
View file

@ -144,23 +144,23 @@ fn main() -> Result<()> {
match args.command {
None => {
let notify_exercise_paths: Option<&'static [&'static str]> = if args.manual_run {
let notify_exercise_names = if args.manual_run {
None
} else {
// For the the notify event handler thread.
// Leaking is not a problem because the slice lives until the end of the program.
Some(
app_state
&*app_state
.exercises()
.iter()
.map(|exercise| exercise.path)
.map(|exercise| exercise.name.as_bytes())
.collect::<Vec<_>>()
.leak(),
)
};
loop {
match watch::watch(&mut app_state, notify_exercise_paths)? {
match watch::watch(&mut app_state, notify_exercise_names)? {
WatchExit::Shutdown => break,
// It is much easier to exit the watch mode, launch the list mode and then restart
// the watch mode instead of trying to pause the watch threads and correct the

6
src/watch.rs
View file

@ -42,19 +42,19 @@ pub enum WatchExit {
pub fn watch(
app_state: &mut AppState,
notify_exercise_paths: Option<&'static [&'static str]>,
notify_exercise_names: Option<&'static [&'static [u8]]>,
) -> Result<WatchExit> {
let (tx, rx) = channel();
let mut manual_run = false;
// Prevent dropping the guard until the end of the function.
// Otherwise, the file watcher exits.
let _debouncer_guard = if let Some(exercise_paths) = notify_exercise_paths {
let _debouncer_guard = if let Some(exercise_names) = notify_exercise_names {
let mut debouncer = new_debouncer(
Duration::from_millis(500),
DebounceEventHandler {
tx: tx.clone(),
exercise_paths,
exercise_names,
},
)
.inspect_err(|_| eprintln!("{NOTIFY_ERR}"))?;

21
src/watch/notify_event.rs
View file

@ -5,7 +5,7 @@ use super::WatchEvent;
pub struct DebounceEventHandler {
pub tx: Sender<WatchEvent>,
pub exercise_paths: &'static [&'static str],
pub exercise_names: &'static [&'static [u8]],
}
impl notify_debouncer_mini::DebounceEventHandler for DebounceEventHandler {
@ -15,15 +15,24 @@ impl notify_debouncer_mini::DebounceEventHandler for DebounceEventHandler {
let Some(exercise_ind) = event
.iter()
.filter_map(|event| {
if event.kind != DebouncedEventKind::Any
|| !event.path.extension().is_some_and(|ext| ext == "rs")
{
if event.kind != DebouncedEventKind::Any {
return None;
}
self.exercise_paths
let file_name = event.path.file_name()?.to_str()?.as_bytes();
if file_name.len() < 4 {
return None;
}
let (file_name_without_ext, ext) = file_name.split_at(file_name.len() - 3);
if ext != b".rs" {
return None;
}
self.exercise_names
.iter()
.position(|path| event.path.ends_with(path))
.position(|exercise_name| *exercise_name == file_name_without_ext)
})
.min()
else {