This reverts commit 8b6baae4.

Our current top crasher is an unclear error when ProcessManager fails to resolve an executable path. To fix this, we'd like to being adjusting the process resolution logic and adding more instrumentation to track failures. In order to begin the process, the ProcessManager has been folded back into the flutter tool

* opt out the flutter tool

* oops EOF

* fix import

* Update tool_backend.dart

* Update daemon_client.dart

* fix more

There have been some more additional reports of a missing 'package:characters' import after upgrading flutter. This has me concerned that our pub caching logic is incorrect. Instead of the tool attempting to guess when pub should be run, always delegate to pub.

Also takes an opportunity to fix the kernel snapshot depending on the .packages or package_config. Due to the generated: date field this causes extra rebuilds. Instead when pub get is run, write out an additional file with just the package contents and version.

Fixes #66777
Fixes #65723

This reverts commit 76cbc462.

There have been some more additional reports of a missing 'package:characters' import after upgrading flutter, as well as problems with detecting the correct language version. This has me concerned that our pub caching logic is incorrect. Instead of the tool attempting to guess when pub should be run, always delegate to pub.

Otherwise the heuristics we have may decide to skip running pub. We should consider reducing the number of dimensions of caching here to a single check optimized for the run/test case.

Delete the destination directory for the web sdk before copying the new contents. This might fix an error where the OS refuses to overwrite the files on dev

[flutter_tools] use flutter tool handler for dwds resources and precache tool pub dependencies (#65814)

If the tool is downloaded from a precompiled snapshot, or if the backing source files in the pub cache are deleted, the dwds debugging functionality will break as the client.js file cannot be located. Instead use the PackageConfig to verify that package location, downloading if it is missing.

Override the dwds middleware to avoid Isolate.resolvePackageUri

Fixes #53644
Fixes #65475

Fixes #64246

If decoding the string contents of a stamp file fails, treat it as if the stamp file is missing. This is always safe to do, since at worst it downloads more artifacts. The files could end up corrupted if they were edited by another program, for example

Add feature flags for android, ios, and fuchsia (on by default). After updating the g3 rollers, the fuchsia feature will be turned off by default. Creates a simpler base type of feature flags for g3 to extend.

Updates android, ios, fuchsia workflows to use feature flags check.
Removes concept of stable artifacts and checks on flutter version.

Fixes #58999
#52859
#12768

update flutter precache --force to delete all stamp files. In the event that a user is hitting a cache issue, this should be easier than re-downloading all artifacts or manually blowing away the cache.

This is probably how it should have worked in the first place

- Update windows precache to include placeholder profile/release artifacts
- Update Linux and windows unpack to account for the cpp_client_wrapper code to live separate from the engine binaries
- Cleanup testing in unpack_linux and remove test cases that are covered in build_system_test.dart

Makes the following changes to the behavior of precache:
- The --all-platforms flags now fetches all artifacts, rather than just
  turning off platform filtering of selected artifacts.
- Explicitly requested artifacts are no longer subject to platform
  filtering. E.g., 'precache --ios' will download iOS artifacts on
  Windows and Linux (but 'precache' without an 'ios' flag will still
  only download iOS artifacts on macOS).
- Desktop platform artifacts now respect the bypassing of platform
  filtering.

Fixes #53272

* Reland: [flutter_tool] Where possible, catch only subtypes of Exception

* Add armv7f to getIOSArchForName

This reverts commit 57c6721c.

This reverts commit 9de7787f.