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Use dart::bin::SetupDartIo to setup dart:io#176714

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mraleph:reduce-duplication-in-embedder
Mar 4, 2026
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Use dart::bin::SetupDartIo to setup dart:io#176714
auto-submit[bot] merged 2 commits intoflutter:masterfrom
mraleph:reduce-duplication-in-embedder

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@mraleph mraleph commented Oct 8, 2025

WIP

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It looks like this pull request may not have tests. Please make sure to add tests or get an explicit test exemption before merging.

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. If you believe this PR qualifies for a test exemption, contact "@test-exemption-reviewer" in the #hackers channel in Discord (don't just cc them here, they won't see it!). The test exemption team is a small volunteer group, so all reviewers should feel empowered to ask for tests, without delegating that responsibility entirely to the test exemption group.

@github-actions github-actions bot added the engine flutter/engine related. See also e: labels. label Oct 8, 2025
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Code Review

This pull request refactors the dart:io setup to use the centralized dart::bin::SetupDartIoLibrary function, which is a good simplification. I've found one issue regarding an unused parameter that seems important for network security. Please see my detailed comment.

@mraleph mraleph marked this pull request as draft October 8, 2025 13:21
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This pull request has been changed to a draft. The currently pending flutter-gold status will not be able to resolve until a new commit is pushed or the change is marked ready for review again.

For more guidance, visit Writing a golden file test for package:flutter.

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

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Piinks commented Dec 15, 2025

Greetings from stale PR triage! 👋
Is this change still on your radar?

@mraleph mraleph force-pushed the reduce-duplication-in-embedder branch 5 times, most recently from 1ef8cdd to aafeab2 Compare December 16, 2025 13:15
@mraleph mraleph force-pushed the reduce-duplication-in-embedder branch from aafeab2 to 978015d Compare March 3, 2026 10:31
@mraleph mraleph force-pushed the reduce-duplication-in-embedder branch from 978015d to 174de9e Compare March 3, 2026 20:37
@mraleph mraleph requested a review from mkustermann March 4, 2026 07:38
@mraleph mraleph marked this pull request as ready for review March 4, 2026 07:38
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Code Review

This pull request refactors the dart:io initialization to use the centralized dart::bin::SetupDartIoLibrary function. This simplifies the engine code by removing manual setup of native resolvers, hooks, and other properties, delegating this responsibility to the Dart SDK. The changes look good and improve code maintainability. I've found one minor issue regarding an unused parameter after the refactoring.

Comment on lines 18 to +20
void DartIO::InitForIsolate(bool may_insecurely_connect_to_all_domains,
const std::string& domain_network_policy) {
// TODO(https://dartbug.com/61694): move this code into dart_io_api.h
Dart_Handle io_lib = Dart_LookupLibrary(ToDart("dart:io"));
Dart_Handle result = Dart_SetNativeResolver(io_lib, dart::bin::LookupIONative,
dart::bin::LookupIONativeSymbol);
FML_CHECK(!CheckAndHandleError(result));
result = Dart_SetFfiNativeResolver(io_lib, dart::bin::LookupIOFfiNative);
FML_CHECK(!CheckAndHandleError(result));

const std::string& domain_network_policy,
const std::string& script_uri) {
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medium

The domain_network_policy parameter is unused within this function following the refactoring. It should be removed to keep the API clean and avoid confusion.

This change will require corresponding updates to:

  • The function declaration in engine/src/flutter/lib/io/dart_io.h.
  • The call site in engine/src/flutter/runtime/dart_isolate.cc.
void DartIO::InitForIsolate(bool may_insecurely_connect_to_all_domains,
                            const std::string& script_uri) {
References
  1. The repository style guide (line 43) mandates following the Google C++ Style Guide, which recommends removing unused function parameters. (link)

@mraleph mraleph added the autosubmit Merge PR when tree becomes green via auto submit App label Mar 4, 2026
@auto-submit auto-submit bot added this pull request to the merge queue Mar 4, 2026
Merged via the queue into flutter:master with commit eb0b756 Mar 4, 2026
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@flutter-dashboard flutter-dashboard bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Mar 4, 2026
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Roll Flutter from 46fb7210422d to d3dd7744e81f (33 revisions)

flutter/flutter@46fb721...d3dd774

2026-03-04 [email protected] Show warning when plugins do not support SwiftPM (flutter/flutter#182506)
2026-03-04 [email protected] Give guided message when project is not compatible with SwiftPM (flutter/flutter#182394)
2026-03-04 [email protected] Pass --web-define through to web runner when using --machine mode (flutter/flutter#183228)
2026-03-04 [email protected] Improve SwiftPM minimum platform mismatch diagnostics (flutter/flutter#182375)
2026-03-04 [email protected] Use dart::bin::SetupDartIo to setup dart:io (flutter/flutter#176714)
2026-03-04 [email protected] Roll Skia from 3197848b14ad to ada0b7628c79 (5 revisions) (flutter/flutter#183221)
2026-03-04 [email protected] Roll Skia from fe9e9f22c531 to 3197848b14ad (15 revisions) (flutter/flutter#183198)
2026-03-04 [email protected] refactor: remove material in reorderable_list_test, scroll_notification_test, scroll_physics_test, shortcuts_test, sliver_floating_header_test, snapshot_widget_test (flutter/flutter#182698)
2026-03-04 [email protected] refactor: remove material in pop_scope_test, route_notification_message_test, two_dimensional_utils, two_dimensional_viewport_test (flutter/flutter#182699)
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2026-03-03 [email protected] [Impeller] Update comments to reflect new info about 2-pass rendering (flutter/flutter#183050)
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2026-03-03 [email protected] Roll Fuchsia Linux SDK from 0dCDM2oORHwDf_pyb... to JJw5EJ87vLGqFVl4h... (flutter/flutter#183177)
2026-03-03 [email protected] Support mixed color spaces in `Color.lerp` (flutter/flutter#182934)
2026-03-03 [email protected] Add warning when there is a widget with color between `Material` and `ListTile` (flutter/flutter#181402)
2026-03-03 [email protected] [ios]uitest for admob banner in scrollable list gesture issue (flutter/flutter#183128)
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2026-03-03 [email protected] fix: bump matcher (flutter/flutter#183167)
2026-03-02 [email protected] Use isA to test for exceptions (flutter/flutter#183129)
2026-03-02 [email protected] [two_dimensional_scrollables] Fix tableview janks when first row/column pinned (flutter/flutter#180563)
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2026-03-02 [email protected] Merge changelog from 3.41.3. (flutter/flutter#183131)
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