Commits on Oct 21, 2024

1. Add support for LSP diagnostic "additional information". …

   This change provides support for additional information that can be
   provided with an LSP diagnostic, for both Flycheck and Flymake
   interfaces.  The main change treats each piece of "additional
   information" as a separate diagnostic with the same severity level as
   the main diagnostic.  Flycheck supports the concept of a group, so for
   Flycheck diagnostics the main diagnostic and all of it's "additional
   information" diagnostics are placed in the same Flycheck group.
   
   "Additional information" diagnostics may refer to a file which is not
   the current buffer.  Flycheck handles this as part of it's normal
   diagnostic interface, however Flymake makes a distinction between
   diagnostics related to the current buffer and those external to
   it (i.e., foreign diagnostics).  For Flymake, the foreign diagnostics
   are managed in the `flymake-list-only-diagnostics` variable.  Flymake
   treats these as interim diagnostics until the file has been opened.
   Therefore, diagnostics placed in `flymake-list-only-diagnostics` are
   removed when that buffer reports its own diagnostics.  Additionally,
   with Flymake, foreign diagnostics are only visible when reporting
   diagnostics for the project (`flymake-show-project-diagnostics`), not
   when reporting diagnostics for the current
   buffer (`flymake-show-buffer-diagnostics`).  Flycheck on the other
   hand, does not make this distinction and will report both types of
   diagnostics together (`flycheck-list-errors`).
   
   Additional changes that drive conformity between Flycheck and Flymake
   were also applied.  When an LSP diagnostic provides a source, this is
   supplied to Flycheck as the "checker", otherwise the default "lsp"
   checker is used.  This is useful to properly identify the LSP backends
   generating the diagnostics when it is available.  Flymake doesn't
   provide a way to specify the checker (or a code), so the diagnostic
   message is appended with this information when provided.

   

   brownts committed Oct 21, 2024
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