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Original PR: #131865

Pre-launch Checklist

  • I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • 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.
  • All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel on Discord.

This PR includes the following changes. These changes only apply to iOS 17 physical devices.

| Command | Change Description  | Changes to User Experience |
| ------------- | ------------- | ------------- |
| `flutter run --release` | Uses `devicectl` to install and launch application in release mode.  | No change.  |
| `flutter run`  | Uses Xcode via automation scripting to run application in debug and profile mode. | Xcode will be opened in the background. Errors/crashes may be caught in Xcode and therefore may not show in terminal. |
| `flutter run --use-application-binary=xxxx` | Creates temporary empty Xcode project and use Xcode to run via automation scripting in debug and profile. | Xcode will be opened in the background. Errors/crashes may be caught in Xcode and therefore may not show in terminal.  |
| `flutter install` | Uses `devicectl` to check installed apps, install app, uninstall app.  | No change.  |
| `flutter screenshot` | Will return error.  | Will return error.  |

Other changes include:
* Using `devicectl` to get information about the device
* Using `idevicesyslog` and Dart VM logging for device logs

Note:
Xcode automation scripting (used in `flutter run` for debug and profile) does not work in a headless (without a UI) interface. No known workaround.

Fixes flutter#128827, flutter#128531.
@github-actions github-actions bot added a: text input Entering text in a text field or keyboard related problems platform-ios iOS applications specifically tool Affects the "flutter" command-line tool. See also t: labels. a: desktop Running on desktop labels Aug 11, 2023
@vashworth vashworth marked this pull request as ready for review August 14, 2023 16:23
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@christopherfujino christopherfujino left a comment

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LGTM

…32491)

Fixes a couple of issues introduced in new iOS 17 physical device tooling: flutter#131865.

1) Duplicate messages were being filtered out too aggressively. 

For example, if on the counter app, you printed "Increment!" on button click, it would only print once no matter how many times you clicked.

Sometimes more than one log source is used at a time and the original intention was to filter duplicates between two log sources, so it wouldn't print the same message from both logs. However, it would also filter when the same message was added more than once via the same log.

The new solution distinguishes a "primary" and a "fallback" log source and prefers to use the primary source unless it's not working, in which it'll use the fallback. If the fallback is faster than the primary, the primary will exclude the logs received by the fallback in a 1-to-1 fashion to prevent too-aggressive filtering. Once a flutter-message has been received by the primary source, fallback messages will be ignored.

Note: iOS < 17 did not regress.

2) There was a race condition between the shutdown hooks and exiting XcodeDebug that was causing a crash when deleting a file that doesn't exist. This only affects CI  - for the new integration tests and when testing with iOS 17 physical devices.
@vashworth
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@christopherfujino Added the logging update to this CP (for 3.14) too. Can you re-approve?

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@christopherfujino christopherfujino left a comment

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Still LGTM

@itsjustkevin itsjustkevin added the autosubmit Merge PR when tree becomes green via auto submit App label Aug 16, 2023
@auto-submit auto-submit bot merged commit 4d8e1f0 into flutter:flutter-3.14-candidate.0 Aug 16, 2023
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a: desktop Running on desktop a: text input Entering text in a text field or keyboard related problems autosubmit Merge PR when tree becomes green via auto submit App platform-ios iOS applications specifically tool Affects the "flutter" command-line tool. See also t: labels.

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3 participants