Follow up on release 0.27.3

[bestander]

• Update: add regression tests for Git.spawn env issues #3759 was reverted because of jest complains, need to reland it with the fixes
• We don't have tests that cover how current Yarn will run Yarn's jest tests Running jest via yarn run breaks jest #3767. Circle CI could compile Yarn and use it to drive test-ci command
• We don't cover private packages installation e2e yarn@0.27.3 consistently 404s on private packages #3765

[Daniel15]

We don't have tests that cover how current Yarn will run Yarn's jest tests #3767. Circle CI could compile Yarn and use it to drive test-ci command

We could make CircleCI use the latest nightly build of Yarn, rather than the current release build. This would help us more easily catch issues with Yarn itself. That's a one-line change in scripts/bootstrap-env-ubuntu.sh:

-echo "deb http://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+echo "deb http://nightly.yarnpkg.com/debian/ nightly main" | sudo tee /etc/apt/sources.list.d/yarn.list

Or the RC instead.

Having said that, that also means that a broken version of Yarn would also break the build, and the build won't be fixed until the fix is committed 😕

[bestander]

I think nightly on Circle and stable on Travis could be a good mix.

[Daniel15]

Given CircleCI is the backbone of our release infra, it might be safer to use nightly on Travis 😛

[bestander]

True!

[bestander]

As a matter of fact Circle is using yarn v0.21.3 and is green.
We might configure one matrix rule on Travis to run on nightly (or compiled current)

[arcanis]

Re: private packages; I've setup a private package at @arcanis/private-pkg for debugging and fixing the issue, but it would be better to have something on the @yarnpkg organization.