polymer-dart pub build not supported behind proxy

[DartBot]

This issue was originally filed by empyrean...@gmail.com

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1. Create a new polymer library web application in DartEditor with sample content
2. either Build Polymer App from DartEditor (pub build --no-minify) or run 'pub build' from the command line

When running outside of a proxy, the build goal succeeds. When behind a corporate proxy, 'pub build' fails with an error: "Transformer library "package:polymer/transformer.dart" not found."

Dart 1.0.0.3_r30188, Mac OS X 10.8 and 10.9

Pub is able to see the proxy settings ("pub upgrade" successfully downloads dependencies) but the transformer library does not seem to respect those settings. Could this be related in any way to the IPv6 issues in [Issue #14677]? (though I'm not trying to run pub serve)

[DartBot]

This comment was originally written by c.targett...@gmail.com

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I have encountered the same issue.

Pub files and output: https://gist.github.com/xlevus/acba5f930214eff6d693

Additionally, when running pub build with blank http_proxy environment variables, it also fails.

    $ http_proxy='' https_proxy='' pub build
    Transformer library "package:polymer/transformer.dart" not found.

While

    $ env --unset=http_proxy --unset=https_proxy pub build

Works.

[DartBot]

This comment was originally written by c.targ...@gmail.com

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And further, setting the no_proxy env var to contain IPv6 localhost addresses, does not work either.

$ no_proxy="localhost,127.0.0.0/8,::1,[::1]" pub build
Transformer library "package:polymer/transformer.dart" not found.

[sethladd]

Added Area-Pub, Triaged labels.

[nex3]

Pub doesn't explicitly handle any proxy configuration; it just calls dart:io and dart:isolate and lets those libraries do the low-level work.

The problem here is that pub starts a server that serves Dart code, then spawns an isolate that imports this Dart code. Apparently this isn't working when a proxy is active. I've filed issue #15215 to track the issue in the underlying libraries.

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Marked this as being blocked by #15215.

[nex3]

Issue #15582 has been merged into this issue.

[sgjesse]

After looking further into this the 'no_proxy' setting in comment #­2 is wrong. The syntax 127.0.0.0/8 is not supported. Use 127.0.0.1 instead:

$ no_proxy="localhost,127.0.0.1,::1,[::1]" pub build

Should work.

[munificent]

Removed Priority-Unassigned label.
Added Priority-Medium label.

[DartBot]

This comment was originally written by trevor.bo...@gmail.com

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I'm having the same issue with 'Transformer library "package:observe/transformer.dart" not found.', but I'm not behind a proxy. My code works fine in dartium, run alone or with the dart-editor, but when I try to "pub build" on the command line, it fails with the aforementioned "not found" error. Very confused, because the file is obviously there. Here's the output of my pub build -v: http://sprunge.us/AJRI

I've also attached it to this message.

There are some warnings in there.

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Attachment:
build.log (136.80 KB)

[DartBot]

This comment was originally written by trevor.borti...@gmail.com

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Oh, and for reference, here's my example project: https://github.com/wulftone/tabby-element/

[munificent]

@trevor, I'm not seeing any errors in either of those logs. Am I missing something?

[munificent]

This looks like it might be stale. Is anyone on this thread still having problems?

[munificent]

Added AssumedStale label.

[DartBot]

This comment was originally written by blit...@gmail.com

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hi i am seeing the same error on window
Pub build failed, [1] Transformer library "package:observe/transformer.dart" not found.

with Dart Editor version 1.2.0.release behind a proxy.

code works fine in dartium but cannont build and run as javascript.

[DartBot]

This comment was originally written by marti...@lundogbendsen.dk

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Hi. I saw the same in dart 1.3...without a proxy...
pub serve
Loading source assets... (0.8s)
Loading di transformers... (0.8s)
Transformer library "package:di/di.dart" not found.

Turns out my pub cache (AppData\Roaming\Pub\Cache) was corrupt (because I once was behind a proxy), and removing it solved the problem.

[DartBot]

This comment was originally written by berz...@gmail.com

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It's not stale. Still having some problems, probably related to that proxy issue.

[nex3]

It sounds from issue #15215 that the solution is to disable the proxy when using pub by setting the environment variable "no_proxy=localhost" when invoking pub.

[DartBot]

This issue has been moved to dart-lang/pub#729.