restore.cmd fails under a proxy environment

To Reproduce

Steps to reproduce the behavior:

1. Execute restore.cmd under a proxy environment.
2. Fail to download install.ps1 here. https://github.com/aspnet/AspNetCore/blob/28678ee430e9f9a8407e846441ab98692b9f9507/eng/common/tools.ps1#L162

Logs

C:\github\AspNetCore>build.cmd
WARNING: No default group of projects was specified, so building the 'managed' subsets of projects. Run `build.cmd
-help` for more details.
Detected JDK in C:\Program Files\AdoptOpenJDK\jdk-11.0.3.7-hotspot (via JAVA_HOME)
at GetDotNetInstallScript, C:\github\AspNetCore\eng\common\tools.ps1: line 162
at InstallDotNet, C:\github\AspNetCore\eng\common\tools.ps1: line 173
at InstallDotNetSdk, C:\github\AspNetCore\eng\common\tools.ps1: line 169
at InitializeDotNetCli, C:\github\AspNetCore\eng\common\tools.ps1: line 135
at InitializeBuildTool, C:\github\AspNetCore\eng\common\tools.ps1: line 354
at InitializeToolset, C:\github\AspNetCore\eng\common\tools.ps1: line 448
at <ScriptBlock>, C:\github\AspNetCore\build.ps1: line 342
at <ScriptBlock>, <No file>: line 1
authentication_failed

Are there any instructions as to build from source under a proxy environment? I cannot find one in here.

[dougbu]

@SIkebe I transferred this because I’m not familiar w/ using eng/common/tools.ps1 when a proxy is necessary. This repo is the owner of that file.

[chcosta]

@Slkebe, I’m going to close this issue.

In principal, I’m not opposed to a PR to Arcade to support a proxy. As you may have inferred, however, there may be some push back by others. My primary concern, and the reason I think we’re unlikely to actually merge the PR, is that I don’t think we’re set up to support / maintain the functionality. It would be very easy for someone to unintentionally break the proxy authentication support and we wouldn’t find out until we impacted you / others. That’s a poor story and would likely cause a lot of bad experiences (both for you and for others).

Please feel free to push back if you feel that there is a strong case for further investment here.