Conflicts with source assets should have a better error message

[nex3]

Right now when barback detects a conflict between a generated asset and a source asset, it displays it like so:

    Transforms {Dart2JS on wordherd|web/solver/solver.dart} all emitted asset wordherd|web/solver/solver.dart.js.

This makes it look like a bug, since there's only one transformer there. The error should make it clear that the conflict was with a source asset on the physical filesystem.

[nex3]

See also issue #14554.

[sigmundch]

Marked this as blocking #14771.

[nex3]

Issue #15668 has been merged into this issue.

[sethladd]

thanks for de-duping!

[sigmundch]

FYI - this bug might be also the reason behind issue #15823, I just replied there to clarify. It seems that the process described in issue #14771 (clicking 'Run As Javascript') is going to trip a lot of people with this error.

[lrhn]

Removed Area-Library label.
Added Area-Pkg label.

[nex3]

Issue #16374 has been merged into this issue.

[anders-sandholm]

Removed Library-Barback label.
Added Pkg-Barback label.

[nex3]

Issue #16748 has been merged into this issue.

[sethladd]

Issue #16748 has been merged into this issue.

[kasperl]

Removed this from the Later milestone.
Added Oldschool-Milestone-Later label.

[kasperl]

Removed Oldschool-Milestone-Later label.

[sonoranDesert]

I'm getting an "all emitted asset" error similar to the one described in this ticket when I run the pub build command on my project.

Is there some way I can determine which asset is causing the conflict?

[sonoranDesert]

Sorry for the emails, but I figured out the issue. If the build artifact already exists then pub build gives you that inscrutable error message, but there is no problem if you clean up beforehand.

[DartBot]

This issue has been moved to dart-archive/barback#18.