Support preparing debugger shell ahead of "open DevTools" (#53437)

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Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/53437

Changelog: [Internal]

The React Native DevTools standalone shell is distributed as a DotSlash file that downloads the required binaries lazily. This diff adds support in dev-middleware for a new `BrowserLauncher.unstable_prepareFuseboxShell` method that integrations can use to kick off the download early. Integrations are expected to implement this by calling the `unstable_prepareDebuggerShell` function (added to the `debugger-shell` package in D78413091).

If `BrowserLauncher.unstable_prepareFuseboxShell` returns an error, dev-middleware will fall back to the browser-based launch flow, even for users opted into the `enableStandaloneFuseboxShell` experiment.

Reviewed By: huntie

Differential Revision: D78413092

fbshipit-source-id: 6868bf07e16353fcd83337ae54c87c5a641a0f99

This commit is contained in:

Moti Zilberman

2025-08-27 02:50:05 -07:00

committed by

Facebook GitHub Bot

parent 7046c24702

commit b5dfb32ed3

7 changed files with 94 additions and 6 deletions

									
										packages/debugger-shell/src/node/index.flow.js
									
		+1
		
												View File
												
				@@ -87,6 +87,7 @@ async function unstable_spawnDebuggerShellWithArgs(

				export type DebuggerShellPreparationResult = $ReadOnly<{

				  code:

				    | 'success'

				    | 'not_implemented'

				    | 'likely_offline'

				    | 'platform_not_supported'

				    | 'possible_corruption'