move input files into exercise directory

src/embedded.rs

@@ -17,6 +17,8 @@ struct ExerciseFiles {
     solution: &'static [u8],
     // Index of the related `ExerciseDir` in `EmbeddedFiles::exercise_dirs`.
     dir_ind: usize,
+    // Files that are read by the exercise.
+    input_files: &'static [InputFile],
 }
 
 // Input files that may be read by exercises.
@@ -64,7 +66,6 @@ pub struct EmbeddedFiles {
     pub info_file: &'static str,
     exercise_files: &'static [ExerciseFiles],
     pub exercise_dirs: &'static [ExerciseDir],
-    pub input_files: &'static [InputFile],
 }
 
 impl EmbeddedFiles {
@@ -97,6 +98,12 @@ impl EmbeddedFiles {
 
             fs::write(&exercise_path, exercise_files.exercise)
                 .with_context(|| format!("Failed to write the exercise file {exercise_path}"))?;
+
+            for InputFile { name, content } in exercise_files.input_files {
+                let path = format!("{prefix}/{dir_name}/{name}", dir_name = dir.name);
+                fs::write(&path, content)
+                    .with_context(|| format!("Failed to write the input file {path}"))?;
+            }
         }
 
         Ok(())

src/init.rs

@@ -144,15 +144,6 @@ pub fn init() -> Result<()> {
             .with_context(|| format!("Failed to create the file {solution_path}"))?;
     }
 
-    // init input files
-    create_dir("input_files").context("Failed to create the directory `input_files`")?;
-    for input_file in EMBEDDED_FILES.input_files {
-        fs::write(
-            format!("input_files/{}", input_file.name),
-            input_file.content,
-        )?;
-    }
-
     let current_cargo_toml = include_str!("../dev-Cargo.toml");
     // Skip the first line (comment).
     let newline_ind = current_cargo_toml