[flutter_tools] support all engine debugging options with FLUTTER_ENGINE_SWITCH environment variables #67150
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| <String>[ | ||
| executable, | ||
| ], | ||
| environment: _computeEnvironment(debuggingOptions, traceStartup, route), |
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Do these options work in release mode on other platforms? Since they won't currently on desktop, maybe we should see if this is non-empty and if the build mode is release, output a warning that the options will be ignored and to file an issue describing their use case.
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The tooling will already ignore the unsupported values when constructing the debugging options object:
That seems like a reasonable place to insert some logging to warn users if they are passing flags that have no effect.
| /// * FLUTTER_ENGINE_SWITCHES to the number of switches. | ||
| /// * FLUTTER_ENGINE_SWITCH_<N> (indexing from 1) to the individual switches. | ||
| Map<String, String> _computeEnvironment(DebuggingOptions debuggingOptions, bool traceStartup, String route) { | ||
| int flags = 1; |
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Wouldn't it be clearer to start this as zero, increment flags at the start of addFlag instead of the end, and not have to subtract in finish?
| } | ||
| if (!debuggingOptions.debuggingEnabled) { | ||
| finish(); | ||
| return environment; |
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Skimming, I almost missed that this was an early return instead of just another flag. Maybe wrap all the rest in if (debuggingOptions.debuggingEnabled) {...} instead of early return so it's clearer?
(As a concrete issue, I think there's a good chance that if I were ever to add anything to the flags here as currently written, I would accidentally add it to the end of the function not realizing that it wouldn't always get there.)
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Updated to only have a single return
Description
Allow providing all debugging options to the desktop engine via the FLUTTER_ENGINE_SWITCH_ environment variables.
Fixes #66532
Fixes #46005
Fixes #58882
The underling engine changes have already landed for Windows, macOS, but linux is still in progress