Provide onDidChangeShell event which is fired when default terminal profile changes

[karrtikr]

Python extension is planning to use environment collection API to activate Python environments for a particular shell. Environment variables to use depends on the shell itself, so when the default shell setting changes, we would like to be notified so we could prepare the new set of environment variables to use the next time terminal opens.

As a workaround we could use onDidOpenTerminal to detect this change with a delay, however that requires the user to relaunch the terminal once environment collection is updated.

cc/ @Tyriar feel free to close this if this is a dup of #160694.

[gjsjohnmurray]

It looks like PR #160900 already added that event as proposed API.

[meganrogge]

/duplicate #160694

[karrtikr]

When I attempt to use the proposal it says:

Can you please clarify on what is needed to done from extension's end to use this?

[meganrogge]

You have to add the proposed API to your package.json like this

[karrtikr]

That is where the screenshot is from in the original pic.

[karrtikr]

Should I create a new issue?

[gjsjohnmurray]

What version of the vscode engine does your extension declare that it uses?

[karrtikr]

It's 1.75.0-20230123:

[karrtikr]

This proposal cannot be used because for this extension the product defines a fixed set of API proposals. You can test your extension but before publishing you MUST reach out to the VS Code team.

Does VSCode have a products file internally which declares which extension gets to use the proposal?