nvim: move hls to lsp.haskell module

.config/nvim/lua/lsp/haskell.lua

@@ -0,0 +1,47 @@
+local mylsp = require("lsp")
+local border = mylsp.border
+local on_attach = mylsp.on_attach
+
+-- Haskell
+vim.g.haskell_tools = {
+    tools = {
+        log = { level = vim.log.levels.OFF },
+        hover = {
+            border = border,
+            stylize_markdown = true,
+        },
+    },
+    hls = {
+        on_attach = function(client, bufnr)
+            local ht = require("haskell-tools")
+            local nnoremap = function(bind, callback, userargs)
+                local args = userargs or {}
+                args.buffer = bufnr
+                vim.keymap.set("n", bind, callback, args)
+            end
+
+            nnoremap("<leader>hhe", ht.lsp.buf_eval_all)
+            nnoremap("<leader>hhs", ht.hoogle.hoogle_signature)
+            nnoremap("<leader>hhr", ht.repl.toggle)
+
+            on_attach(client, bufnr)
+        end,
+        default_settings = {
+            haskell = {
+                checkProject = false, -- PERF: don't check the entire project on initial load
+                formattingProvider = "fourmolu",
+                plugin = {
+                    rename = {
+                        config = {
+                            diff = true, -- (experimental) rename across modules
+                        },
+                    },
+                },
+            },
+        },
+        settings = function(project_root)
+            local ht = require("haskell-tools")
+            return ht.lsp.load_hls_settings(project_root, { settings_file_pattern = "hls.json" })
+        end,
+    },
+}