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[flutter_tools] Support flavors and transformers for shaders - #181889

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Laurie-Lin:pr/shader-transformers
Mar 13, 2026
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[flutter_tools] Support flavors and transformers for shaders#181889
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Laurie-Lin:pr/shader-transformers

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@Laurie-Lin

@Laurie-Lin Laurie-Lin commented Feb 4, 2026

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This PR adds support for transformers on entries under flutter: shaders: in pubspec.yaml, bringing it closer to the existing assets entry model.

When a shader entry declares transformers, Flutter tools will run the transformer chain prior to shader compilation (Impeller/impellerc). This is wired through the build/bundle paths as well as DevFS shader recompilation during hot reload, so transformed sources are consistently used.

Fixes #181888

Testing

cd $FLUTTER_ROOT/packages/flutter_tools
../../bin/flutter test test/general.shard/flutter_manifest_test.dart test/general.shard/build_system/targets/assets_test.dart -r expanded

Pre-launch Checklist

@github-actions github-actions Bot added the tool Affects the "flutter" command-line tool. See also t: labels. label Feb 4, 2026

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Code Review

This pull request adds support for transformers to shader entries in pubspec.yaml, aligning them with the existing asset entry model. The changes correctly wire this through the build/bundle paths and DevFS for hot reload. The implementation is solid and well-tested. My main feedback is to address some code duplication in the shader transformation logic to improve maintainability.

Comment thread packages/flutter_tools/lib/src/build_system/targets/assets.dart Outdated
Comment thread packages/flutter_tools/lib/src/bundle_builder.dart Outdated
@bkonyi
bkonyi requested review from bkonyi and chingjun February 9, 2026 15:51
@bkonyi

bkonyi commented Feb 9, 2026

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Thanks for your contribution, @Laurie-Lin!

This LGTM overall (although there are some analysis failures that need to be resolved), but we'll need a second set of eyes on this before it can be approved.

@chingjun chingjun left a comment

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Mostly LGTM other than stricter input check needed.

Also, can we add tests for the changes in bundle_builder.dart and devfs.dart? Thanks!

Comment thread packages/flutter_tools/lib/src/flutter_manifest.dart
Comment thread packages/flutter_tools/lib/src/asset.dart
@Laurie-Lin Laurie-Lin changed the title flutter_tools: support transformers for flutter.shaders [flutter_tools] Support flavors and transformers for shaders Feb 11, 2026
@bkonyi

bkonyi commented Feb 24, 2026

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Thanks for adding flavors and platform support here!

There's some analysis failures that need to be resolved, but this looks good to me once they're resolved:

   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/build_system/targets/assets.dart:157:15 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/build_system/targets/assets.dart:160:23 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/bundle_builder.dart:208:15 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/bundle_builder.dart:210:23 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:244:17 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:300:17 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:360:17 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:511:13 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:546:15 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:583:26 • omit_obvious_local_variable_types
   info • Unnecessary use of a null check ('!') • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:597:59 • unnecessary_null_checks
   info • Unnecessary use of a null check ('!') • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:601:41 • unnecessary_null_checks
   info • Unnecessary use of a null check ('!') • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:602:46 • unnecessary_null_checks

@Laurie-Lin

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Thanks for adding flavors and platform support here!

There's some analysis failures that need to be resolved, but this looks good to me once they're resolved:

   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/build_system/targets/assets.dart:157:15 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/build_system/targets/assets.dart:160:23 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/bundle_builder.dart:208:15 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/bundle_builder.dart:210:23 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:244:17 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:300:17 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:360:17 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:511:13 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:546:15 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:583:26 • omit_obvious_local_variable_types
   info • Unnecessary use of a null check ('!') • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:597:59 • unnecessary_null_checks
   info • Unnecessary use of a null check ('!') • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:601:41 • unnecessary_null_checks
   info • Unnecessary use of a null check ('!') • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:602:46 • unnecessary_null_checks

OK, I'm starting to work on fixing these warnings.

@Laurie-Lin

Laurie-Lin commented Mar 10, 2026

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Thanks for adding flavors and platform support here!

There's some analysis failures that need to be resolved, but this looks good to me once they're resolved:

   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/build_system/targets/assets.dart:157:15 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/build_system/targets/assets.dart:160:23 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/bundle_builder.dart:208:15 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/lib/src/bundle_builder.dart:210:23 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:244:17 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:300:17 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:360:17 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:511:13 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:546:15 • omit_obvious_local_variable_types
   info • Omit the type annotation on a local variable when the type is obvious • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:583:26 • omit_obvious_local_variable_types
   info • Unnecessary use of a null check ('!') • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:597:59 • unnecessary_null_checks
   info • Unnecessary use of a null check ('!') • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:601:41 • unnecessary_null_checks
   info • Unnecessary use of a null check ('!') • packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart:602:46 • unnecessary_null_checks

Done, I fixed the analysis issues and reran targeted analysis on the affected files.

# dart analyze \
  packages/flutter_tools/lib/src/build_system/targets/assets.dart \
  packages/flutter_tools/lib/src/bundle_builder.dart \
  packages/flutter_tools/test/general.shard/build_system/targets/assets_test.dart
Analyzing assets.dart, bundle_builder.dart, assets_test.dart... 0.5s
No issues found!

@bkonyi

@bkonyi bkonyi added the CICD Run CI/CD label Mar 12, 2026

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Looks good to me! Just need signoff from @chingjun before we can submit this.

@chingjun chingjun left a comment

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LGTM, thanks for adding the support for flavors and platforms!

@chingjun chingjun added the autosubmit Merge PR when tree becomes green via auto submit App label Mar 13, 2026
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Merged via the queue into flutter:master with commit cc7d8fb Mar 13, 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 13, 2026
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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)
...
nateshmbhat pushed a commit to nateshmbhat/flutter_packages that referenced this pull request Mar 25, 2026
…r#11276)

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)
...
okorohelijah pushed a commit to okorohelijah/packages that referenced this pull request Mar 26, 2026
…r#11276)

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)
...
mboetger pushed a commit to mboetger/flutter that referenced this pull request Mar 26, 2026
…#181889)

<!--
Thanks for filing a pull request!
Reviewers are typically assigned within a week of filing a request.
To learn more about code review, see our documentation on Tree Hygiene:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
-->

This PR adds support for `transformers` on entries under `flutter:
shaders:` in `pubspec.yaml`, bringing it closer to the existing assets
entry model.

When a shader entry declares transformers, Flutter tools will run the
transformer chain prior to shader compilation (Impeller/impellerc). This
is wired through the build/bundle paths as well as DevFS shader
recompilation during hot reload, so transformed sources are consistently
used.

Fixes flutter#181888

## Testing
```bash
cd $FLUTTER_ROOT/packages/flutter_tools
../../bin/flutter test test/general.shard/flutter_manifest_test.dart test/general.shard/build_system/targets/assets_test.dart -r expanded
```

## Pre-launch Checklist

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

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

---------

Co-authored-by: Ben Konyi <[email protected]>
ahmedsameha1 pushed a commit to ahmedsameha1/flutter that referenced this pull request Apr 14, 2026
…#181889)

<!--
Thanks for filing a pull request!
Reviewers are typically assigned within a week of filing a request.
To learn more about code review, see our documentation on Tree Hygiene:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
-->

This PR adds support for `transformers` on entries under `flutter:
shaders:` in `pubspec.yaml`, bringing it closer to the existing assets
entry model.

When a shader entry declares transformers, Flutter tools will run the
transformer chain prior to shader compilation (Impeller/impellerc). This
is wired through the build/bundle paths as well as DevFS shader
recompilation during hot reload, so transformed sources are consistently
used.

Fixes flutter#181888

## Testing
```bash
cd $FLUTTER_ROOT/packages/flutter_tools
../../bin/flutter test test/general.shard/flutter_manifest_test.dart test/general.shard/build_system/targets/assets_test.dart -r expanded
```

## Pre-launch Checklist

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

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

---------

Co-authored-by: Ben Konyi <[email protected]>
creatorpiyush pushed a commit to creatorpiyush/packages that referenced this pull request Jun 10, 2026
…r#11276)

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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Support transformers for flutter.shaders entries in pubspec.yaml

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