Improved support for `debug-adapter-protocol` (#4186)

* Improve support for \`debug-adapter-protocol\`

* More improvements, fix formatting in debug console

* Fix attaching

* Prepare for source maps

* Start of source map support, breakpoints work

* Source map support

* add some package.jsons

* wip

* Update package.json

* More fixes

* Make source maps safer if exception occurs

* Check bun version if it fails

* Fix console.log formatting

* Fix source maps partly

* More source map fixes

* Prepare for extension

* watch mode with dap

* Improve preview code

* Prepare for extension 2

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/packages/bun-debug-adapter-protocol/debugger/sourcemap.test.ts b/packages/bun-debug-adapter-protocol/debugger/sourcemap.test.ts
new file mode 100644
index 000000000..44d9ca362
--- /dev/null
+++ b/packages/bun-debug-adapter-protocol/debugger/sourcemap.test.ts
@@ -0,0 +1,31 @@
+import { test, expect } from "bun:test";
+import { readFileSync } from "node:fs";
+import { SourceMap } from "./sourcemap";
+
+test("works without source map", () => {
+  const sourceMap = getSourceMap("without-sourcemap.js");
+  expect(sourceMap.generatedLocation({ line: 7 })).toEqual({ line: 7, column: 0, verified: true });
+  expect(sourceMap.generatedLocation({ line: 7, column: 2 })).toEqual({ line: 7, column: 2, verified: true });
+  expect(sourceMap.originalLocation({ line: 11 })).toEqual({ line: 11, column: 0, verified: true });
+  expect(sourceMap.originalLocation({ line: 11, column: 2 })).toEqual({ line: 11, column: 2, verified: true });
+});
+
+test("works with source map", () => {
+  const sourceMap = getSourceMap("with-sourcemap.js");
+  // FIXME: Columns don't appear to be accurate for `generatedLocation`
+  expect(sourceMap.generatedLocation({ line: 3 })).toMatchObject({ line: 4, verified: true });
+  expect(sourceMap.generatedLocation({ line: 27 })).toMatchObject({ line: 20, verified: true });
+  expect(sourceMap.originalLocation({ line: 32 })).toEqual({ line: 43, column: 4, verified: true });
+  expect(sourceMap.originalLocation({ line: 13 })).toEqual({ line: 13, column: 6, verified: true });
+});
+
+function getSourceMap(filename: string): SourceMap {
+  const { pathname } = new URL(`./fixtures/${filename}`, import.meta.url);
+  const source = readFileSync(pathname, "utf-8");
+  const match = source.match(/\/\/# sourceMappingURL=(.*)$/m);
+  if (match) {
+    const [, url] = match;
+    return SourceMap(url);
+  }
+  return SourceMap();
+}