only set initial debugger breakpoint once (#4441)

* unset `set_breakpoint_on_first_line` on reload

* move to `module_loader.zig`

1 files changed, 11 insertions, 2 deletions

diff --git a/src/bun.js/module_loader.zig b/src/bun.js/module_loader.zig
index e165b20fa..0c3313a46 100644
--- a/src/bun.js/module_loader.zig
+++ b/src/bun.js/module_loader.zig
@@ -172,6 +172,15 @@ fn dumpSource(specifier: string, printer: anytype) !void {
     }
 }
 
+fn setBreakPointOnFirstLine() bool {
+    const s = struct {
+        var set_break_point: bool = true;
+    };
+    var ret = s.set_break_point;
+    s.set_break_point = false;
+    return ret;
+}
+
 pub const RuntimeTranspilerStore = struct {
     const debug = Output.scoped(.compile, false);
 
@@ -403,7 +412,7 @@ pub const RuntimeTranspilerStore = struct {
                     vm.main.len == path.text.len and
                     vm.main_hash == hash and
                     strings.eqlLong(vm.main, path.text, false),
-                .set_breakpoint_on_first_line = vm.debugger != null and vm.debugger.?.set_breakpoint_on_first_line and strings.eqlLong(vm.main, path.text, true),
+                .set_breakpoint_on_first_line = vm.debugger != null and vm.debugger.?.set_breakpoint_on_first_line and strings.eqlLong(vm.main, path.text, true) and setBreakPointOnFirstLine(),
             };
 
             defer {
@@ -1440,7 +1449,7 @@ pub const ModuleLoader = struct {
                     .dont_bundle_twice = true,
                     .allow_commonjs = true,
                     .inject_jest_globals = jsc_vm.bundler.options.rewrite_jest_for_tests and is_main,
-                    .set_breakpoint_on_first_line = is_main and jsc_vm.debugger != null and jsc_vm.debugger.?.set_breakpoint_on_first_line,
+                    .set_breakpoint_on_first_line = is_main and jsc_vm.debugger != null and jsc_vm.debugger.?.set_breakpoint_on_first_line and setBreakPointOnFirstLine(),
                 };
                 defer {
                     if (should_close_input_file_fd and input_file_fd != 0) {