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[flutter_tools] Avoid File.exists and File.stat, as per enforced lint rule#183463

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srawlins merged 2 commits intoflutter:masterfrom
srawlins:file-exists
Mar 16, 2026
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[flutter_tools] Avoid File.exists and File.stat, as per enforced lint rule#183463
srawlins merged 2 commits intoflutter:masterfrom
srawlins:file-exists

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avoid_slow_async_io is already enforced, but there was a bug where it wasn't catching File.exists and File.stat. This PR prepares flutter/flutter for a fix.

The fix is landing to support extension types: dart-lang/sdk#58838.
The fix will be a re-landing of https://dart-review.googlesource.com/c/sdk/+/486420.

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  • I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
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  • I read the [Tree Hygiene] wiki page, which explains my responsibilities.
  • I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement].
  • I signed the [CLA].
  • I listed at least one issue that this PR fixes in the description above.
  • I updated/added relevant documentation (doc comments with ///).
  • I added new tests to check the change I am making, or this PR is [test-exempt].
  • I followed the [breaking change policy] and added [Data Driven Fixes] where supported.
  • All existing and new tests are passing.

@srawlins srawlins requested review from a team as code owners March 10, 2026 18:18
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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 a: tests "flutter test", flutter_test, or one of our tests tool Affects the "flutter" command-line tool. See also t: labels. framework flutter/packages/flutter repository. See also f: labels. a: desktop Running on desktop team-ios Owned by iOS platform team team-macos Owned by the macOS platform team labels Mar 10, 2026
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Code Review

This pull request successfully migrates numerous instances of File.exists() and File.stat() to their synchronous counterparts, File.existsSync() and File.statSync(), respectively. This change aligns with the avoid_slow_async_io lint rule and prepares the codebase for an upcoming Dart SDK fix. The modifications are consistent across all affected files and directly address the stated objective of the pull request.

Note: Security Review did not run due to the size of the PR.

@srawlins srawlins added this pull request to the merge queue Mar 16, 2026
Merged via the queue into flutter:master with commit 66fd677 Mar 16, 2026
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@srawlins srawlins deleted the file-exists branch March 16, 2026 16:58
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 16, 2026
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 16, 2026
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 16, 2026
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 17, 2026
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 17, 2026
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 17, 2026
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 17, 2026
auto-submit bot pushed a commit to flutter/packages that referenced this pull request Mar 18, 2026
Roll Flutter from 732e05dd483c to d117642c18e0 (47 revisions)

flutter/flutter@732e05d...d117642

2026-03-17 [email protected] Roll Skia from fa3bb1f60d99 to dba893a44d7a (1 revision) (flutter/flutter#183783)
2026-03-17 [email protected] [ios][pv]fix admob banner scrollable on ios 18.2 (flutter/flutter#183274)
2026-03-17 [email protected] Roll Packages from 0f2eeae to a9d36fb (2 revisions) (flutter/flutter#183782)
2026-03-17 [email protected] Update goldctl version (flutter/flutter#183538)
2026-03-17 [email protected] Roll Skia from 69be1087807b to fa3bb1f60d99 (1 revision) (flutter/flutter#183779)
2026-03-17 [email protected] Roll Dart SDK from 38dedf00c2cd to 30cdd2634429 (1 revision) (flutter/flutter#183778)
2026-03-17 [email protected] Roll Fuchsia Linux SDK from s7rq9m8tH2aZtX-kP... to zYBvfzIH95BY3cCzL... (flutter/flutter#183777)
2026-03-17 [email protected] Roll Skia from 4ea039236580 to 69be1087807b (2 revisions) (flutter/flutter#183772)
2026-03-17 [email protected] Roll Skia from fb402093cfb5 to 4ea039236580 (1 revision) (flutter/flutter#183770)
2026-03-17 [email protected] Roll Skia from d6bc6d17d637 to fb402093cfb5 (8 revisions) (flutter/flutter#183765)
2026-03-17 [email protected] Roll Dart SDK from ff50ab8ecea4 to 38dedf00c2cd (2 revisions) (flutter/flutter#183764)
2026-03-17 [email protected] Wrap EGL image usage in a GObject (flutter/flutter#183539)
2026-03-17 [email protected] Adds platform_view_test_macos_impeller (flutter/flutter#183760)
2026-03-17 [email protected] Adds flush to metal screenshotter. (flutter/flutter#183758)
2026-03-16 [email protected] Add a platform OpenGL context. (flutter/flutter#183715)
2026-03-16 [email protected] Fix formatting, capitalization, and grammar in activation issue template (flutter/flutter#183061)
2026-03-16 [email protected] Roll Dart SDK from 4a6febbf882e to ff50ab8ecea4 (2 revisions) (flutter/flutter#183739)
2026-03-16 [email protected] docs: add code review guidance to CONTRIBUTING.md (flutter/flutter#182778)
2026-03-16 [email protected] Filter 'waiting for customer response' issues from macOS triage (flutter/flutter#183552)
2026-03-16 [email protected] Adds github action to reset cicd when new branches come (flutter/flutter#183675)
2026-03-16 [email protected] Adds macos impeller complex layout performance test (flutter/flutter#183669)
2026-03-16 [email protected] Roll Dart SDK from b74e5b537d71 to 4a6febbf882e (2 revisions) (flutter/flutter#183695)
2026-03-16 [email protected] Use properties to configure leak_tracking and test_randomization_off in .ci.yaml (flutter/flutter#183605)
2026-03-16 [email protected] [flutter_tools] Avoid File.exists and File.stat, as per enforced lint rule (flutter/flutter#183463)
2026-03-16 [email protected] Properly parse URIs for testPath when the host is running on Windows. (flutter/flutter#176881)
2026-03-16 [email protected] Roll Packages from 91f7c33 to 0f2eeae (6 revisions) (flutter/flutter#183730)
2026-03-16 [email protected] Roll Skia from a6ccaf95c6e0 to d6bc6d17d637 (5 revisions) (flutter/flutter#183726)
2026-03-16 [email protected] Roll Fuchsia Linux SDK from WOfyEFkxf9JX26VS-... to s7rq9m8tH2aZtX-kP... (flutter/flutter#183723)
2026-03-15 [email protected] Roll Skia from 34ace196b838 to a6ccaf95c6e0 (2 revisions) (flutter/flutter#183712)
2026-03-14 [email protected] Roll Fuchsia Linux SDK from vAWG8mRvsQHblDBsy... to WOfyEFkxf9JX26VS-... (flutter/flutter#183694)
2026-03-14 [email protected] Roll Skia from 06106120c6bf to 34ace196b838 (1 revision) (flutter/flutter#183677)
2026-03-14 [email protected] Roll Dart SDK from 6a3dc9d4f881 to b74e5b537d71 (2 revisions) (flutter/flutter#183676)
2026-03-14 [email protected] Add some quality of life improvements to the release GitHub workflows. (flutter/flutter#183658)
2026-03-14 [email protected] Fix RouteAware.didPushNext documentation inaccuracy (flutter/flutter#183097)
2026-03-13 [email protected] Adds complex layout impeller startup benchmark (flutter/flutter#183655)
2026-03-13 [email protected] Adds switch for sdf rendering plus golden tests (flutter/flutter#183543)
2026-03-13 [email protected] Made complex_layout_scroll_perf explicitly skia (flutter/flutter#183663)
2026-03-13 [email protected] Update android integration test to match the current android semantics (flutter/flutter#183548)
2026-03-13 [email protected] Roll Skia from 6c0346103c24 to 06106120c6bf (3 revisions) (flutter/flutter#183654)
2026-03-13 [email protected] Roll Dart SDK from d5f6d3c17499 to 6a3dc9d4f881 (1 revision) (flutter/flutter#183652)
2026-03-13 [email protected] Fix PinnedHeaderSliver semantics focus capture (flutter/flutter#179023)
2026-03-13 [email protected] [a11y][android] In Android 16, sendWindowContentChangeEvent when check state changes (flutter/flutter#183606)
2026-03-13 [email protected] Update gradle utils to know about kgp 2.3.10 constraints (flutter/flutter#183416)
2026-03-13 [email protected] Roll Skia from 029229d8be91 to 6c0346103c24 (5 revisions) (flutter/flutter#183648)
2026-03-13 [email protected] Roll Fuchsia Linux SDK from jJbpv4J_tjW-wuKDq... to vAWG8mRvsQHblDBsy... (flutter/flutter#183646)
2026-03-13 [email protected] [flutter_tools] Support flavors and transformers for shaders (flutter/flutter#181889)
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