Offer users an extension downgrade if certain failure conditions detected.

Suppose we intend to introduce some functionality that will benefit most users, but after release, we realize it breaks for 5-10% of users. I've seen people try downgrading to a previous version. That alone is useful when tracking the problem and works well enough for them. However, I wonder how many users encounter the breaking issue, and don't know what to do, or might stop using the extension.

If the issue can't be immediately fixed, and we don't want to (can't) revert the change could we use some kind of issue detection (stacktrace/condition in LS or client itself) in a subsequent service release, and then offer the user a downgrade to the last safe version ? Then just perform :

commands.executeCommand("workbench.extensions.installExtension", `redhat.java@${safeVersion}`);

To avoid having to do a release, would it make sense to have some kind of publicly defined file that maps between expected errors and the corresponding downgrade to propose ?

I don't feel that strongly about this (so I'm fine with just closing), but a lot of regressions can be quickly solved by a downgrade, and making the process more user-friendly would be nice.

CC: @testforstephen @fbricon for thoughts.

Không có tệp hoặc bài kiểm thử nào được nêu tên. Hãy bắt đầu bằng việc xác định phần xử lý của extension đối với các lỗi của language server hoặc client, cùng VS Code extension-install command được hiển thị trong issue. Xác định xem việc phát hiện lỗi và safe-version mapping có khả thi hay không; để được xem là hoàn tất, cần có scope đã được thống nhất, hành vi downgrade và các bài kiểm thử.