Provide a way of getting a map supporting lookup from packageName to Uri

[nex3]

By analogy with Platform.packageRoot. This is useful for ensuring that spawned tools like the analyzer or the VM run in the same package context as the current process.

/cc @davidmorgan

[sethladd]

For completeness, what would the getter return?

[nex3]

Personally, I'd prefer it return the URI of the package spec file if one was used for the current isolate (or maybe for the VM as a whole?). That doesn't exactly match the behavior of Platform.packageRoot, though, which returns exactly the value of the --package-root flag provided to the VM, if any. In general that tends to be less than optimally helpful, though, since there may be a package root/spec in effect even if it's not explicitly passed.

[mit-mit]

Punting to 1.13 based on prioritization in #23372

[sethladd]

cc @iposva-google who I think is looking into this.

[mit-mit]

Landed: https://codereview.chromium.org/1334353002/

[sethladd]

👍

[nex3]

This has been rolled back, so I'm re-opening.

Also, the new name for this property is Isolate.packageConfig.

[mit-mit]

I believe this has landed

[nex3]

This hasn't landed yet; the new APIs don't include a map, just a function to do the lookup, which isn't what we asked for. @mit-mit can you reopen?

[iposva-google]

"Personally, I'd prefer it return the URI of the package spec file if one was used for the current isolate" is exactly what you asked for and getting with Isolate.packageConfig. Keeping closed.

[nex3]

I'm sorry, you're right. I'll file a separate issue for the map.