lsp: remove definitions from the nix store

lua/opdavies/lsp/handlers.lua

@@ -0,0 +1,21 @@
+local M = {}
+
+M.definition = function()
+  local params = vim.lsp.util.make_position_params()
+
+  vim.lsp.buf_request(0, "textDocument/definition", params, function(err, result, ctx, config)
+    local new_result = vim.tbl_filter(function(v)
+      -- Remove any referneces to the nix store via the .direnv directory.
+      return not string.find(v.targetUri, ".direnv")
+    end, result)
+
+    if #new_result > 0 then
+      result = new_result
+    end
+
+    vim.lsp.handlers["textDocument/definition"](err, result, ctx, config)
+    vim.cmd [[normal! zz]]
+  end)
+end
+
+return M

lua/opdavies/lsp/init.lua

@@ -28,6 +28,8 @@ local custom_init = function(client)
   client.config.flags.allow_incremental_sync = true
 end
 
+local handlers = require "opdavies.lsp.handlers"
+
 local custom_attach = function(client)
   local filetype = vim.api.nvim_buf_get_option(0, "filetype")
 
@@ -41,7 +43,7 @@ local custom_attach = function(client)
   buf_nnoremap { "[d", vim.diagnostic.goto_prev }
   buf_nnoremap { "]d", vim.diagnostic.goto_next }
   buf_nnoremap { "gD", vim.lsp.buf.declaration }
-  buf_nnoremap { "gd", vim.lsp.buf.definition }
+  buf_nnoremap { "gd", handlers.definition }
   buf_nnoremap { "gi", vim.lsp.buf.implementation }
   buf_nnoremap { "gT", vim.lsp.buf.type_definition }