feat!: make conform.nvim and nvim-lint the default formatters/linters

lua/lazyvim/plugins/linting.lua

@@ -0,0 +1,67 @@
+return {
+  {
+    "mfussenegger/nvim-lint",
+    event = "LazyFile",
+    opts = {
+      -- Event to trigger linters
+      events = { "BufWritePost", "BufReadPost", "InsertLeave" },
+      linters_by_ft = {
+        fish = { "fish" },
+      },
+      -- LazyVim extension to easily override linter options
+      -- or add custom linters.
+      ---@type table<string,table>
+      linters = {
+        -- -- Example of using selene only when a selene.toml file is present
+        -- selene = {
+        --   -- `condition` is another LazyVim extension that allows you to
+        --   -- dynamically enable/disable linters based on the context.
+        --   condition = function(ctx)
+        --     return vim.fs.find({ "selene.toml" }, { path = ctx.filename, upward = true })[1]
+        --   end,
+        -- },
+      },
+    },
+    config = function(_, opts)
+      local M = {}
+
+      local lint = require("lint")
+      for name, linter in pairs(opts.linters) do
+        if type(linter) == "table" and type(lint.linters) == "table" then
+          lint.linters[name] = vim.tbl_deep_extend("force", lint.linters[name], linter)
+        end
+      end
+      lint.linters_by_ft = opts.linters_by_ft
+
+      function M.debounce(ms, fn)
+        local timer = vim.loop.new_timer()
+        return function(...)
+          local argv = { ... }
+          timer:start(ms, 0, function()
+            timer:stop()
+            vim.schedule_wrap(fn)(unpack(argv))
+          end)
+        end
+      end
+
+      function M.lint()
+        local names = lint.linters_by_ft[vim.bo.filetype] or {}
+        local ctx = { filename = vim.api.nvim_buf_get_name(0) }
+        ctx.dirname = vim.fn.fnamemodify(ctx.filename, ":h")
+        names = vim.tbl_filter(function(name)
+          local linter = lint.linters[name]
+          return linter and not (type(linter) == "table" and linter.condition and not linter.condition(ctx))
+        end, names)
+
+        if #names > 0 then
+          lint.try_lint(names)
+        end
+      end
+
+      vim.api.nvim_create_autocmd(opts.events, {
+        group = vim.api.nvim_create_augroup("nvim-lint", { clear = true }),
+        callback = M.debounce(100, M.lint),
+      })
+    end,
+  },
+}