From 0fc5179dea51e44c0280d5d3ae03017eb50291ea Mon Sep 17 00:00:00 2001
From: Christoph Urlacher <christoph.urlacher@protonmail.com>
Date: Wed, 2 Jul 2025 12:32:39 +0200
Subject: [PATCH] Modules/Neovim: Add hover-nvim to display information from
 multiple LSPs + Linters simultaneously

---
 home/modules/neovim/default.nix | 87 ++++++++++++++++++++++++++++++++-
 1 file changed, 86 insertions(+), 1 deletion(-)

diff --git a/home/modules/neovim/default.nix b/home/modules/neovim/default.nix
index 969e44f8..6cada431 100644
--- a/home/modules/neovim/default.nix
+++ b/home/modules/neovim/default.nix
@@ -571,6 +571,90 @@ in {
             # Don't call setup!
           };
 
+          hover = let
+            # Display LSP information and Diagnostics at the same time
+            # https://github.com/lewis6991/hover.nvim/issues/34#issuecomment-1625662866
+            lspWithDiag = ''
+              {
+                 name = "LSP",
+                 priority = 1000,
+                 enabled = function()
+                   return true
+                 end,
+
+                 execute = function(opts, done)
+                   local params = vim.lsp.util.make_position_params()
+                   local ___ = "\n─────────────────────────────────────────────────────────────────────────────\n"
+
+                   vim.lsp.buf_request_all(0, 'textDocument/hover', params, function(responses)
+                     local value = ""
+                     for _, response in pairs(responses) do
+                       local result = response.result
+                       if result and result.contents and result.contents.value then
+                         if value ~= "" then
+                           value = value .. ___
+                         end
+                         value = value .. result.contents.value
+                       end
+                     end
+
+                     local _, row = unpack(vim.fn.getpos("."))
+                     local lineDiag = vim.diagnostic.get(0, { lnum = row - 1 })
+                     for _, d in pairs(lineDiag) do
+                       if d.message then
+                         if value ~= "" then
+                           value = value .. ___
+                         end
+                         value = value .. string.format("*%s* %s", d.source, d.message)
+                       end
+                     end
+                     value = value:gsub("\r", "")
+
+                     if value ~= "" then
+                       done({ lines = vim.split(value, "\n", true), filetype = "markdown" })
+                     else
+                       done()
+                     end
+                   end)
+                 end,
+               }
+            '';
+          in rec {
+            name = "hover";
+            pkg = pkgs.vimPlugins.hover-nvim;
+            lazy = true;
+            event = ["BufReadPost" "BufNewFile"];
+            config = mkDefaultConfig name;
+            opts = {
+              init.__raw = ''
+                function()
+                  -- Register custom providers
+                  require('hover').register(${lspWithDiag})
+
+                  -- Require providers
+                  -- require("hover.providers.lsp")
+                  -- require('hover.providers.diagnostic')
+                  require('hover.providers.fold_preview')
+                  require('hover.providers.man')
+
+                  -- require('hover.providers.gh')
+                  -- require('hover.providers.gh_user')
+                  -- require('hover.providers.jira')
+                  -- require('hover.providers.dap')
+                  -- require('hover.providers.dictionary')
+                  -- require('hover.providers.highlight')
+                end
+              '';
+              preview_opts = {
+                border = "rounded";
+              };
+              # Whether the contents of a currently open hover window should be moved
+              # to a :h preview-window when pressing the hover keymap.
+              preview_window = false;
+              title = false;
+            };
+          };
+
           illuminate = rec {
             name = "illuminate";
             pkg = pkgs.vimPlugins.vim-illuminate;
@@ -789,7 +873,7 @@ in {
                     };
                   };
                 }
-                # {name = "nil_ls";} # Conflicts with nixd's hover
+                {name = "nil_ls";}
                 {
                   name = "nixd";
                   extraOptions.cmd = [
@@ -1859,6 +1943,7 @@ in {
           flash # Highlight f/F search results
           gitsigns # Show git line additions/deletions/changes in the gutter
           haskell-tools # Haskell integration
+          hover # Multiple hover providers
           illuminate # Highlight usages of word under cursor
 
           intellitab # Indent to the correct level on blanklines # TODO: Behaves bit fishy sometimes