Is there a way to show diagnostics in popup?

[Martinsos]

Is there a way to show diagnostics in popup?

[HaraldKi]

Indeed for diagnostics, in particular compiler error messages, the sideline is not that helpful. I don't have the editor window full screen, so even with a Lsp Ui Sideline Diagnostic Max Line Length of 150 many compiler error message fall off the screen to the right.

[jcs090218]

You can turn off the diagnostic by setting lsp-ui-sideline-show-diagnostics to nil.

[Martinsos]

You can turn off the diagnostic by setting lsp-ui-sideline-show-diagnostics to nil.

What do I get with that though -> they start showing in minibuffer, right?

What I was hoping for instead was to have them in the popup, or on the sideline but better formatted.

[jcs090218]

What do I get with that though -> they start showing in minibuffer, right?

No, it depends on the value of the variable flycheck-display-errors-function. The default value is #'flycheck-display-error-messages, so you will see it in the minibuffer.

What I was hoping for instead was to have them in the popup, or on the sideline but better formatted.

Here are some alternatives:

• sideline + sideline-flycheck (this is the one I used/created)
• flycheck-popup-tip
• flycheck-pos-tip
• flycheck-posframe

[HaraldKi]

I tried flycheck-popup-tip as well as flycheck-posframe and both have problems with flycheck-next/previous-error.

• The first one has a post-command hook which seems to immediately remove the popup again.
• The second one show the popup only if the flycheck-next-error jumps to a position which does not need scrolling. If scrolling is needed, no popup is shown.

Both work when using cursor movement to walk the cursor onto a point where flycheck has marked an error.

I am not asking anyone to investigate this, as reasons may still be found in my peculiar setup, but the above may safe someone some head scratching when seeing the same problems.