Open bigger set of configured projects when opening composite project for operations that operate over multiple projects like rename

[sheetalkamat]

#28261 on top of #32028

• Add tests
• Bigger project opening set means that much longer time to do the operation. So we need some optimizers for this. There are multiple options here and one or many can be chosen.
  • Need some sort of indicator if the operation is exposing something that's outside scope of the project. (eg renaming local function in checker shouldn't need to open this so that we are delaying this as much as possible)
  • May be send more locations as event (eg in find all references if not rename can handle that)
• We need to have way to unload projects (with some sort of priority based) when the operation might cause too many projects resulting in it running out of memory. This could probably be different PR but then we need some sort of flag to opt out of opening that bigger set so that people have a way to work with the set.

[sheetalkamat]

@typescript-bot pack this

[typescript-bot]

Heya @sheetalkamat, I've started to run the tarball bundle task on this PR at e3de872. You can monitor the build here. It should now contribute to this PR's status checks.

[typescript-bot]

Hey @sheetalkamat, I've packed this into an installable tgz. You can install it for testing by referencing it in your package.json like so:

{
    "devDependencies": {
        "typescript": "https://typescript.visualstudio.com/cf7ac146-d525-443c-b23c-0d58337efebc/_apis/build/builds/43089/artifacts?artifactName=tgz&fileId=A5E45FC3E112C3C7DBC263D476706F2CBF49D938579E47EAB6995E7E94213C2402&fileName=/typescript-3.7.0-insiders.20190906.tgz"
    }
}

and then running npm install.

[RyanCavanaugh]

LGTM with some name comments

[DanielRosenwasser]

What does this change imply? Are operations like rename more accurate now?

[sheetalkamat]

This means in our projects setup if you just opened utilities file from compiler and rename some functions in there, it would look for other sibling projects since our solution project references them (even though there is no file from services/server or other such projects open)

[telamonian]

I just ran into this problem today. How lovely to see that it's already solved. Thank you for working on this!

I was wondering, what release of typescript will this be a part of? I can't seem to find any relevant info

[orta]

It should be in 3.8 beta

[sunniejai]

Does this resolve #30823?

[OliverJAsh]

I was linked to #30823 from microsoft/vscode#80423 and microsoft/vscode#80438.

I just tested both of the above issues with 3.8 RC. microsoft/vscode#80438 seems to be fixed, but the issue I described in microsoft/vscode#80423 still remains.

[pokey]

#30823 (comment)