[Bug] Failing to use "yarn install" behind a proxy

• I’d be willing to implement a fix

Describe the bug

• yarn 2.4.0 (project-wide), yarn 1.22.1 (global install)
• debian machine

On install (yarn install) yarn2 tries to download yarn classic (nightly) even though a stable yarn classic is already installed (yarn -v => 1.22.1). That attempt is made ignoring httpProxy setting.

Our CI environment can only connect to the outside through a proxy. Thus yarn install fails.

cat /tmp/xfs-d71dd059/pack.log

Installing the project using Yarn Classic

➤ YN0000: Downloading https://nightly.yarnpkg.com/latest.js
➤ YN0001: RequestError: connect ETIMEDOUT 104.16.171.99:443
    at ClientRequest.<anonymous> (/home/gaming1/buildAgent/work/34b05846fe2fe691/.yarn/releases/yarn-berry.cjs:23:31294)
    at Object.onceWrapper (events.js:421:26)
    at ClientRequest.emit (events.js:326:22)
    at ClientRequest.e.emit (/home/gaming1/buildAgent/work/34b05846fe2fe691/.yarn/releases/yarn-berry.cjs:2:583004)
    at TLSSocket.socketErrorListener (_http_client.js:428:9)
    at TLSSocket.emit (events.js:314:20)
    at emitErrorNT (internal/streams/destroy.js:92:8)
    at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
    at processTicksAndRejections (internal/process/task_queues.js:84:21)
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1145:16)
➤ YN0000: Failed with errors in 2m 14s

I tried downloading the file https://nightly.yarnpkg.com/latest.js using wget (which has a proper proxy configuration and works) but running latest.js from command line only seems to start yarn install again:

 ./latest.js
➤ YN0000: ┌ Resolution step
...

1. I don’t get why it’s trying to install yarn classic when it’s already installed
2. I don’t get why the installed yarn classic should be a nightly build instead of a stable release
3. I don’t get why the download attempt does not use the proxy configuration from .yarnrc

Please note that

• I am not responsible for the recent change, in our repo, from yarn classic to yarn berry
• I have no power over the security put in place, so I have to use a proxy to download something from the outside, no other option

I have no idea how to progress further, I’ve been stuck for 2 days (+ a weekend) without CI, so any help would be appreciated.

[merceyz]

The request is for a https url so you need to use

httpsProxy: "http://1.2.3.4:1234"

[merceyz]

I don’t get why it’s trying to install yarn classic when it’s already installed I don’t get why the installed yarn classic should be a nightly build instead of a stable release

One of your dependencies is a git repo using Yarn 1, but since the version in use isn’t specified by the repo we fetch the latest nightly. (could probably be stable)

I don’t get why the download attempt does not use the proxy configuration from .yarnrc

It’s in the external project which doesn’t have that config, we should probably fix that but as a temp workaround you can add the proxy to your global config in ~/.yarnrc.yml