feat: added next up message with the path of next exercise

Added a new property to Exercise, next_path. I populate this property,
when loading the exercises.

src/exercise.rs

@@ -54,6 +54,8 @@ pub struct Exercise {
     pub mode: Mode,
     // The hint text associated with the exercise
     pub hint: String,
+    // The path of the next exercise
+    pub next_path: Option<PathBuf>
 }
 
 // An enum to track of the state of an Exercise.

src/main.rs

@@ -9,7 +9,7 @@ use notify_debouncer_mini::{new_debouncer, DebouncedEventKind};
 use std::ffi::OsStr;
 use std::fs;
 use std::io::{self, prelude::*};
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use std::process::{Command, Stdio};
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::mpsc::{channel, RecvTimeoutError};
@@ -108,9 +108,11 @@ fn main() {
     }
 
     let toml_str = &fs::read_to_string("info.toml").unwrap();
-    let exercises = toml::from_str::<ExerciseList>(toml_str).unwrap().exercises;
+    let mut exercises = toml::from_str::<ExerciseList>(toml_str).unwrap().exercises;
     let verbose = args.nocapture;
 
+    edit_exercises(&mut exercises);
+
     let command = args.command.unwrap_or_else(|| {
         println!("{DEFAULT_OUT}\n");
         std::process::exit(0);
@@ -245,6 +247,20 @@ fn main() {
     }
 }
 
+fn edit_exercises(exercises: &mut Vec<Exercise>){
+    let siz = exercises.len();
+    for i in 0.. siz {
+        if i == siz - 1 {
+            exercises[i].next_path = None;
+            break;
+        }
+        let next_path = &exercises[i + 1].path;
+        let mut x = PathBuf::new();
+        x.push(next_path);
+        exercises[i].next_path = Some(x);
+    }
+}
+
 fn spawn_watch_shell(
     failed_exercise_hint: &Arc<Mutex<Option<String>>>,
     should_quit: Arc<AtomicBool>,

src/verify.rs

@@ -171,6 +171,13 @@ fn prompt_for_completion(
 
     let no_emoji = env::var("NO_EMOJI").is_ok();
 
+    match &exercise.next_path {
+        Some(path) => {
+            println!("Next up: {:?}", path);
+        }
+        None => {}
+    }
+
     let clippy_success_msg = if no_emoji {
         "The code is compiling, and Clippy is happy!"
     } else {