Problems with pub [...] serve

[BKBuEGmbH]

Using pub [...] serve I get the following error messages (yes i made a clean pub get, pub serve): [SEVERE] build_web_compilers|ddc on package:resource/resource.dartdevc.module: Error compiling dartdevc module:resource|lib/resource.ddc.js

[error] Target of URI doesn't exist: 'io_none.dart'. (package:resource/src/resource_loader.dart, line 8, col 8) [error] Target of URI doesn't exist: 'io_io.dart'. (package:resource/src/resource_loader.dart, line 10, col 26)

Please fix all errors before compiling (warnings are okay). } [...] [SEVERE] build_web_compilers|ddc on package:time_machine/time_machine.dartdevc.module: Error compiling dartdevc module:time_machine|lib/time_machine.ddc.js

[error] Target of URI doesn't exist: 'src/platforms/vm.dart'. (package:time_machine/time_machine.dart, line 12, col 24)

Please fix all errors before compiling (warnings are okay). }

When I change the imports and remove the "SEVERE" ones, I can run the app. I only use LocalDate in my app.

[Dana-Ferguson]

That's weird. Is this only happening for DDC? Will this also happen for Dart2JS as wel? If you're only using LocalDate you don't need to do any initialize calls at the beginning ~ those load the timezone database and discover your local timezone (for ZonedDateTime)

[BKBuEGmbH]

If I use the build process, the analyzer throws no error. Haven't checked, if it ist working deployed to an web server. I am just starting with the project (and this is the first dart project for me, too).

[rich-j]

We have this issue with DDC and have found a workaround. The problem is Config specific imports don't work with analyzer/ddc (dart-lang/sdk#34177) with related open issue https://github.com/dart-lang/sdk/issues/33347. Time_machine has a dependency on https://github.com/dart-lang/resource which has open issue https://github.com/dart-lang/resource/issues/30.

The workaround is mentioned in https://github.com/dart-lang/sdk/issues/34177

I can work around the issue with // ignore: URI_DOES_NOT_EXIST comments (although I need one for every single condition...), but that shouldn't be necessary :).

For development we change time_machine.dart import statements to:

// ignore: URI_DOES_NOT_EXIST
import 'src/platforms/platform_io.dart'
  // `dart.library.js` is compatible with node and browser via dart2js -- `dart.library.html` will only work for the browser
  // or at lest it seemed it should be, when I tried `dart.library.js` in chrome, it failed to evaluate to true
  // ignore: URI_DOES_NOT_EXIST
  if (dart.library.html) 'src/platforms/web.dart'
  // ignore: URI_DOES_NOT_EXIST
  if (dart.library.io) 'src/platforms/vm.dart'
as timeMachine;

and the resource dependency resource_loader.dart imports to:

// ignore: URI_DOES_NOT_EXIST
import "io_none.dart"
    // ignore: URI_DOES_NOT_EXIST
    if (dart.library.html) "io_html.dart"
    // ignore: URI_DOES_NOT_EXIST
    if (dart.library.io) "io_io.dart" as io;

We can then run under DDC and it has no impact on Dart2JS or the Dart VM.