feat(debugger): REPL add breakpoint by sourcecode line

tooling/debugger/src/context.rs

@@ -429,6 +429,12 @@ impl<'a, B: BlackBoxFunctionSolver<FieldElement>> DebugContext<'a, B> {
             .filter(|v: &Vec<Location>| !v.is_empty())
     }
 
+    /// Returns the `FileId` of the file associated with the innermost function on the call stack.
+    pub(super) fn get_current_file(&mut self) -> Option<FileId> {
+        self.get_current_source_location()
+            .and_then(|locations| locations.last().map(|location| location.file))
+    }
+
     /// Returns the (possible) stack of source locations corresponding to the
     /// given opcode location. Due to compiler inlining it's possible for this
     /// function to return multiple source locations. An empty vector means that

tooling/debugger/src/repl.rs

@@ -243,6 +243,24 @@ impl<'a, B: BlackBoxFunctionSolver<FieldElement>> ReplDebugger<'a, B> {
         }
     }
 
+    fn add_breakpoint_at_line(&mut self, line_number: i64) {
+        let Some(current_file) = self.context.get_current_file() else {
+            println!("No current file.");
+            return;
+        };
+
+        let best_location =
+            self.context.find_opcode_for_source_location(&current_file, line_number);
+
+        match best_location {
+            Some(location) => {
+                println!("Added breakpoint at line {}", line_number);
+                self.add_breakpoint_at(location)
+            }
+            None => println!("No opcode at line {}", line_number),
+        }
+    }
+
     fn delete_breakpoint_at(&mut self, location: DebugLocation) {
         if self.context.delete_breakpoint(&location) {
             println!("Breakpoint at {location} deleted");
@@ -536,6 +554,16 @@ pub fn run<B: BlackBoxFunctionSolver<FieldElement>>(
                 }
             },
         )
+        .add(
+            "break",
+            command! {
+                "add a breakpoint at a line of the current file",
+                (line_number: i64) => |line_number| {
+                    ref_context.borrow_mut().add_breakpoint_at_line(line_number);
+                    Ok(CommandStatus::Done)
+                }
+            },
+        )
         .add(
             "break",
             command! {