Build error: Transforms Dart2JS on all emitted asset

[Hecatoncheir]

Dart VM version: 1.14.2 (Tue Feb 9 15:09:45 2016) on "linux_x64"
Pub 1.14.2

Hi. When I try run pub serve of generated polymer element, I get error:

Build error:
Transforms {Dart2JS on wysiwyg_e|example/packages/test/src/runner/browser/static/host.dart} all emitted asset wysiwyg_e|example/packages/test/src/runner/browser/static/host.dart.js.

Yaml for custom-element-apigen:

files_to_generate:
    - wysiwyg-e/wysiwyg-e.html
    - iron-flex-layout/iron-flex-layout.html
    - iron-flex-layout/iron-flex-layout-classes.html
    - iron-icon/iron-icon.html
    - iron-icons/iron-icons.html
    - iron-media-query/iron-media-query.html
    - font-roboto/roboto.html
    - paper-button/paper-button.html
    - paper-item/paper-item.html
    - paper-listbox/paper-listbox.html
    - paper-menu-button/paper-menu-button.html
    - iron-behaviors/iron-control-state.html
    - paper-behaviors/paper-ripple-behavior.html
files_to_load:
    - lib/src/undo-mgr/behavior.html
    - lib/src/paper-behaviors/paper-button-behavior.html
    - lib/src/paper-item/paper-item-behavior.html
    - lib/src/iron-behaviors/iron-button-state.html
    - lib/src/iron-menu-behavior/iron-menu-behavior.html
    - lib/src/iron-selector/iron-multi-selectable.html
    - lib/src/iron-selector/iron-selectable.html
    - lib/src/iron-a11y-keys-behavior/iron-a11y-keys-behavior.html

StackOverflow
Repository with generated element

[jakemac53]

Something weird is going on here, pub seems to think that the file example/packages/test/src/runner/browser/static/host.dart is part of the wysiwyg_e package, which it is not.

[Hecatoncheir]

How can I fix this?

[jakemac53]

cc @nex3 do you have any idea what would cause this?

[nex3]

This error usually means that there's a copy of the given file on the filesystem and a transformer is trying to generate one, which produces a conflict.

[jakemac53]

This asset id doesn't seem to make any sense either tho wysiwyg_e|example/packages/test/src/runner/browser/static/host.dart, my guess would be that lies at the root of the issue?

[nex3]

Yeah, that is strange. Transformers shouldn't ever be running on a file in /packages/.

[Hecatoncheir]

it's important to me. I meet with this error with every element that I want to do port.

[jakemac53]

I noticed you have checked in a .packages file as well as the packages symlink in the example folder. These should both be added to your .gitignore, not sure if it might be affecting things or not.

[jakemac53]

I sent out https://github.com/Rasarts/wysiwyg-e/pull/1 which cleans up things to use the stubs_to_generate and package_mappings options. I was not seeing the reported issue though.

[Hecatoncheir]

Thanks for pr. The error can be seen at terminal, when localhost open in Dartium.

[jakemac53]

Yes I checked there, everything is working fine for me (although i do get some runtime errors). I would recommend cloning the repo in a new folder and trying to start over? Or possibly running pub cache repair and deleting your .pub directory.

[Hecatoncheir]

Yes, thanks. Now work without error.