Merge 59e8f70e55 into 0d258b9e96

Cargo.lock

@@ -95,9 +95,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "clap"
-version = "4.5.17"
+version = "4.5.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e5a21b8495e732f1b3c364c9949b201ca7bae518c502c80256c96ad79eaf6ac"
+checksum = "b0956a43b323ac1afaffc053ed5c4b7c1f1800bacd1683c353aabbb752515dd3"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -105,9 +105,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.17"
+version = "4.5.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8cf2dd12af7a047ad9d6da2b6b249759a22a7abc0f474c1dae1777afa4b21a73"
+checksum = "4d72166dd41634086d5803a47eb71ae740e61d84709c36f3c34110173db3961b"
 dependencies = [
  "anstream",
  "anstyle",
@@ -117,9 +117,9 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.5.13"
+version = "4.5.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "501d359d5f3dcaf6ecdeee48833ae73ec6e42723a1e52419c79abf9507eec0a0"
+checksum = "4ac6a0c7b1a9e9a5186361f67dfa1b88213572f427fb9ab038efb2bd8c582dab"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -289,9 +289,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.158"
+version = "0.2.159"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8adc4bb1803a324070e64a98ae98f38934d91957a99cfb3a43dcbc01bc56439"
+checksum = "561d97a539a36e26a9a5fad1ea11a3039a67714694aaa379433e580854bc3dc5"
 
 [[package]]
 name = "libredox"
@@ -434,9 +434,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.5.4"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0884ad60e090bf1345b93da0a5de8923c93884cd03f40dfcfddd3b4bee661853"
+checksum = "355ae415ccd3a04315d3f8246e86d67689ea74d88d915576e1589a351062a13b"
 dependencies = [
  "bitflags 2.6.0",
 ]
@@ -536,9 +536,9 @@ dependencies = [
 
 [[package]]
 name = "serde_spanned"
-version = "0.6.7"
+version = "0.6.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb5b1b31579f3811bf615c144393417496f152e12ac8b7663bf664f4a815306d"
+checksum = "87607cb1398ed59d48732e575a4c28a7a8ebf2454b964fe3f224f2afc07909e1"
 dependencies = [
  "serde",
 ]
@@ -620,9 +620,9 @@ dependencies = [
 
 [[package]]
 name = "toml_edit"
-version = "0.22.21"
+version = "0.22.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b072cee73c449a636ffd6f32bd8de3a9f7119139aff882f44943ce2986dc5cf"
+checksum = "4ae48d6208a266e853d946088ed816055e556cc6028c5e8e2b84d9fa5dd7c7f5"
 dependencies = [
  "indexmap",
  "serde",
@@ -846,9 +846,9 @@ checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
 name = "winnow"
-version = "0.6.18"
+version = "0.6.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68a9bda4691f099d435ad181000724da8e5899daa10713c2d432552b9ccd3a6f"
+checksum = "36c1fec1a2bb5866f07c25f68c26e565c4c200aebb96d7e55710c19d3e8ac49b"
 dependencies = [
  "memchr",
 ]

Cargo.toml

@@ -20,7 +20,7 @@ rust-version = "1.80"
 
 [workspace.dependencies]
 serde = { version = "1.0.210", features = ["derive"] }
-toml_edit = { version = "0.22.21", default-features = false, features = ["parse", "serde"] }
+toml_edit = { version = "0.22.22", default-features = false, features = ["parse", "serde"] }
 
 [package]
 name = "rustlings"
@@ -48,7 +48,7 @@ include = [
 [dependencies]
 ahash = { version = "0.8.11", default-features = false }
 anyhow = "1.0.89"
-clap = { version = "4.5.17", features = ["derive"] }
+clap = { version = "4.5.18", features = ["derive"] }
 crossterm = { version = "0.28.1", default-features = false, features = ["windows", "events"] }
 notify = { version = "6.1.1", default-features = false, features = ["macos_fsevent"] }
 os_pipe = "1.2.1"

dev/Cargo.toml

@@ -116,6 +116,8 @@ bin = [
   { name = "generics1_sol", path = "../solutions/14_generics/generics1.rs" },
   { name = "generics2", path = "../exercises/14_generics/generics2.rs" },
   { name = "generics2_sol", path = "../solutions/14_generics/generics2.rs" },
+  { name = "generics3", path = "../exercises/14_generics/generics3.rs" },
+  { name = "generics3_sol", path = "../solutions/14_generics/generics3.rs" },
   { name = "traits1", path = "../exercises/15_traits/traits1.rs" },
   { name = "traits1_sol", path = "../solutions/15_traits/traits1.rs" },
   { name = "traits2", path = "../exercises/15_traits/traits2.rs" },

exercises/14_generics/generics3.rs

@@ -0,0 +1,54 @@
+// generics3.rs
+// Execute `rustlings hint generics3` or use the `hint` watch subcommand for a hint.
+
+// This function should take an array of `Option` elements and returns array of not None elements
+// TODO fix this function signature
+fn into_dispose_nulls(list: Vec<Option<&str>>) -> Vec<&str> {
+    list.into_iter().flatten().collect()
+}
+
+fn main() {
+    // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn store_str_on_list() {
+        let names_list = vec![Some("maria"), Some("jacob"), None, Some("kacper"), None];
+        let only_values = into_dispose_nulls(names_list);
+        assert_eq!(only_values.len(), 3);
+    }
+
+    #[test]
+    fn store_numbers_on_list() {
+        let numbers_list = vec![Some(1), Some(2), None, Some(3)];
+        let only_values = into_dispose_nulls(numbers_list);
+        assert_eq!(only_values.len(), 3);
+    }
+
+    #[test]
+    fn store_custom_type_on_list() {
+        #[allow(dead_code)]
+        struct Rectangle {
+            width: i32,
+            height: i32,
+        }
+        impl Rectangle {
+            fn new(width: i32, height: i32) -> Self {
+                Self { width, height }
+            }
+        }
+
+        let custom_list = vec![
+            Some(Rectangle::new(1, 2)),
+            None,
+            None,
+            Some(Rectangle::new(3, 4)),
+        ];
+        let only_values = into_dispose_nulls(custom_list);
+        assert_eq!(only_values.len(), 2);
+    }
+}

rustlings-macros/info.toml

@@ -749,6 +749,17 @@ hint = """
 Related section in The Book:
 https://doc.rust-lang.org/book/ch10-01-syntax.html#in-method-definitions"""
 
+[[exercises]]
+name = "generics3"
+dir = "14_generics"
+hint = """
+Vectors in Rust use generics to create dynamically-sized arrays of any type.
+The `into_dispose_nulls` function takes a vector as an argument, but only accepts vectors that store the &str type.
+To allow the function to accept vectors that store any type, you can leverage your knowledge about generics.
+If you're unsure how to proceed, please refer to the Rust Book at:
+https://doc.rust-lang.org/book/ch10-01-syntax.html#in-function-definitions.
+"""
+
 # TRAITS
 
 [[exercises]]

solutions/14_generics/generics3.rs

@@ -0,0 +1,53 @@
+// generics3.rs
+// Execute `rustlings hint generics3` or use the `hint` watch subcommand for a hint.
+
+// Here we added generic type `T` to function signature
+// Now this function can be used with vector of any
+fn into_dispose_nulls<T>(list: Vec<Option<T>>) -> Vec<T> {
+    list.into_iter().flatten().collect()
+}
+
+fn main() {
+    // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn store_str_on_list() {
+        let names_list = vec![Some("maria"), Some("jacob"), None, Some("kacper"), None];
+        let only_values = into_dispose_nulls(names_list);
+        assert_eq!(only_values.len(), 3);
+    }
+
+    #[test]
+    fn store_numbers_on_list() {
+        let numbers_list = vec![Some(1), Some(2), None, Some(3)];
+        let only_values = into_dispose_nulls(numbers_list);
+        assert_eq!(only_values.len(), 3);
+    }
+
+    #[test]
+    fn store_custom_type_on_list() {
+        struct Rectangle {
+            width: i32,
+            height: i32,
+        }
+        impl Rectangle {
+            fn new(width: i32, height: i32) -> Self {
+                Self { width, height }
+            }
+        }
+
+        let custom_list = vec![
+            Some(Rectangle::new(1, 2)),
+            None,
+            None,
+            Some(Rectangle::new(3, 4)),
+        ];
+        let only_values = into_dispose_nulls(custom_list);
+        assert_eq!(only_values.len(), 2);
+    }
+}

src/app_state.rs

@@ -381,7 +381,7 @@ impl AppState {
 
     // Return the exercise index of the first pending exercise found.
     fn check_all_exercises(&self, stdout: &mut StdoutLock) -> Result<Option<usize>> {
-        stdout.write_all(RERUNNING_ALL_EXERCISES_MSG)?;
+        stdout.write_all(FINAL_CHECK_MSG)?;
         let n_exercises = self.exercises.len();
 
         let status = thread::scope(|s| {
@@ -441,7 +441,10 @@ impl AppState {
     /// 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.
-    pub fn done_current_exercise(&mut self, stdout: &mut StdoutLock) -> Result<ExercisesProgress> {
+    pub fn done_current_exercise<const CLEAR_BEFORE_FINAL_CHECK: bool>(
+        &mut self,
+        stdout: &mut StdoutLock,
+    ) -> Result<ExercisesProgress> {
         let exercise = &mut self.exercises[self.current_exercise_ind];
         if !exercise.done {
             exercise.done = true;
@@ -453,6 +456,12 @@ impl AppState {
             return Ok(ExercisesProgress::NewPending);
         }
 
+        if CLEAR_BEFORE_FINAL_CHECK {
+            clear_terminal(stdout)?;
+        } else {
+            stdout.write_all(b"\n")?;
+        }
+
         if let Some(pending_exercise_ind) = self.check_all_exercises(stdout)? {
             stdout.write_all(b"\n\n")?;
 
@@ -482,8 +491,7 @@ 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 RERUNNING_ALL_EXERCISES_MSG: &[u8] = b"
-All exercises seem to be done.
+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 = "+----------------------------------------------------+

src/run.rs

@@ -44,7 +44,7 @@ pub fn run(app_state: &mut AppState) -> Result<()> {
         stdout.write_all(b"\n")?;
     }
 
-    match app_state.done_current_exercise(&mut stdout)? {
+    match app_state.done_current_exercise::<false>(&mut stdout)? {
         ExercisesProgress::NewPending | ExercisesProgress::CurrentPending => {
             stdout.write_all(b"Next exercise: ")?;
             app_state

src/watch.rs

@@ -69,11 +69,11 @@ fn run_watch(
     // Prevent dropping the guard until the end of the function.
     // Otherwise, the file watcher exits.
     let _watcher_guard = if let Some(exercise_names) = notify_exercise_names {
+        let notify_event_handler =
+            NotifyEventHandler::build(watch_event_sender.clone(), exercise_names)?;
+
         let mut watcher = RecommendedWatcher::new(
-            NotifyEventHandler {
-                sender: watch_event_sender.clone(),
-                exercise_names,
-            },
+            notify_event_handler,
             Config::default().with_poll_interval(Duration::from_secs(1)),
         )
         .inspect_err(|_| eprintln!("{NOTIFY_ERR}"))?;

src/watch/notify_event.rs

@@ -1,15 +1,71 @@
+use anyhow::{Context, Result};
 use notify::{
-    event::{MetadataKind, ModifyKind},
+    event::{AccessKind, AccessMode, MetadataKind, ModifyKind, RenameMode},
     Event, EventKind,
 };
-use std::sync::{atomic::Ordering::Relaxed, mpsc::Sender};
+use std::{
+    sync::{
+        atomic::Ordering::Relaxed,
+        mpsc::{sync_channel, RecvTimeoutError, Sender, SyncSender},
+    },
+    thread,
+    time::Duration,
+};
 
 use super::{WatchEvent, EXERCISE_RUNNING};
 
+const DEBOUNCE_DURATION: Duration = Duration::from_millis(200);
+
 pub struct NotifyEventHandler {
-    pub sender: Sender<WatchEvent>,
-    /// Used to report which exercise was modified.
-    pub exercise_names: &'static [&'static [u8]],
+    error_sender: Sender<WatchEvent>,
+    // Sends the index of the updated exercise.
+    update_sender: SyncSender<usize>,
+    // Used to report which exercise was modified.
+    exercise_names: &'static [&'static [u8]],
+}
+
+impl NotifyEventHandler {
+    pub fn build(
+        watch_event_sender: Sender<WatchEvent>,
+        exercise_names: &'static [&'static [u8]],
+    ) -> Result<Self> {
+        let (update_sender, update_receiver) = sync_channel(0);
+        let error_sender = watch_event_sender.clone();
+
+        // Debouncer
+        thread::Builder::new()
+            .spawn(move || {
+                let mut exercise_updated = vec![false; exercise_names.len()];
+
+                loop {
+                    match update_receiver.recv_timeout(DEBOUNCE_DURATION) {
+                        Ok(exercise_ind) => exercise_updated[exercise_ind] = true,
+                        Err(RecvTimeoutError::Timeout) => {
+                            for (exercise_ind, updated) in exercise_updated.iter_mut().enumerate() {
+                                if *updated {
+                                    if watch_event_sender
+                                        .send(WatchEvent::FileChange { exercise_ind })
+                                        .is_err()
+                                    {
+                                        break;
+                                    }
+
+                                    *updated = false;
+                                }
+                            }
+                        }
+                        Err(RecvTimeoutError::Disconnected) => break,
+                    }
+                }
+            })
+            .context("Failed to spawn a thread to debounce file changes")?;
+
+        Ok(Self {
+            error_sender,
+            update_sender,
+            exercise_names,
+        })
+    }
 }
 
 impl notify::EventHandler for NotifyEventHandler {
@@ -22,8 +78,8 @@ impl notify::EventHandler for NotifyEventHandler {
             Ok(v) => v,
             Err(e) => {
                 // An error occurs when the receiver is dropped.
-                // After dropping the receiver, the debouncer guard should also be dropped.
-                let _ = self.sender.send(WatchEvent::NotifyErr(e));
+                // After dropping the receiver, the watcher guard should also be dropped.
+                let _ = self.error_sender.send(WatchEvent::NotifyErr(e));
                 return;
             }
         };
@@ -32,6 +88,10 @@ impl notify::EventHandler for NotifyEventHandler {
             EventKind::Any => (),
             EventKind::Modify(modify_kind) => match modify_kind {
                 ModifyKind::Any | ModifyKind::Data(_) => (),
+                ModifyKind::Name(rename_mode) => match rename_mode {
+                    RenameMode::Any | RenameMode::To => (),
+                    RenameMode::From | RenameMode::Both | RenameMode::Other => return,
+                },
                 ModifyKind::Metadata(metadata_kind) => match metadata_kind {
                     MetadataKind::Any | MetadataKind::WriteTime => (),
                     MetadataKind::AccessTime
@@ -40,12 +100,17 @@ impl notify::EventHandler for NotifyEventHandler {
                     | MetadataKind::Extended
                     | MetadataKind::Other => return,
                 },
-                ModifyKind::Name(_) | ModifyKind::Other => return,
+                ModifyKind::Other => return,
             },
-            EventKind::Access(_)
-            | EventKind::Create(_)
-            | EventKind::Remove(_)
-            | EventKind::Other => return,
+            EventKind::Access(access_kind) => match access_kind {
+                AccessKind::Any => (),
+                AccessKind::Close(access_mode) => match access_mode {
+                    AccessMode::Any | AccessMode::Write => (),
+                    AccessMode::Execute | AccessMode::Read | AccessMode::Other => return,
+                },
+                AccessKind::Read | AccessKind::Open(_) | AccessKind::Other => return,
+            },
+            EventKind::Create(_) | EventKind::Remove(_) | EventKind::Other => return,
         }
 
         let _ = input_event
@@ -62,6 +127,6 @@ impl notify::EventHandler for NotifyEventHandler {
                     .iter()
                     .position(|exercise_name| *exercise_name == file_name_without_ext)
             })
-            .try_for_each(|exercise_ind| self.sender.send(WatchEvent::FileChange { exercise_ind }));
+            .try_for_each(|exercise_ind| self.update_sender.send(exercise_ind));
     }
 }

src/watch/state.rs

@@ -113,7 +113,7 @@ impl<'a> WatchState<'a> {
             return Ok(ExercisesProgress::CurrentPending);
         }
 
-        self.app_state.done_current_exercise(stdout)
+        self.app_state.done_current_exercise::<true>(stdout)
     }
 
     fn show_prompt(&self, stdout: &mut StdoutLock) -> io::Result<()> {