fix(nvim): fix nvim-lint conditional linting

2 files changed, 82 insertions, 38 deletions

diff --git a/nvim/.config/nvim/lua/plugins/nvim-lint.lua b/nvim/.config/nvim/lua/plugins/nvim-lint.lua
index d8a8640..a6ceaa7 100644
--- a/nvim/.config/nvim/lua/plugins/nvim-lint.lua
+++ b/nvim/.config/nvim/lua/plugins/nvim-lint.lua
@@ -1,3 +1,38 @@
+local utils = require("tobyvin.utils")
+
+local function find_config(filename)
+	local config = unpack(vim.fs.find(filename, {
+		path = vim.api.nvim_buf_get_name(0),
+		upward = true,
+	})) or ("%s/%s/%s"):format(vim.env.XDG_CONFIG_HOME, vim.fs.basename(filename), filename)
+	if vim.fn.filereadable(config) == 1 then
+		return config
+	end
+end
+
+local function try_lint()
+	local lint = require("lint")
+	local names = lint._resolve_linter_by_ft(vim.bo.filetype)
+
+	if #names == 0 then
+		vim.list_extend(names, lint.linters_by_ft["_"] or {})
+	end
+
+	vim.list_extend(names, lint.linters_by_ft["*"] or {})
+
+	names = vim.tbl_filter(function(name)
+		local linter = lint.linters[name]
+		if not linter then
+			vim.notify("Linter not found: " .. name, vim.log.levels.WARN, { title = "nvim-lint" })
+		end
+		return linter and not (type(linter) == "table" and linter.condition and not linter.condition())
+	end, names)
+
+	if #names > 0 then
+		lint.try_lint(names)
+	end
+end
+
 ---@type LazyPluginSpec
 local M = {
 	"mfussenegger/nvim-lint",
@@ -11,57 +46,53 @@ local M = {
 		},
 		linters = {
 			markdownlint = {
-				config = "markdownlint.yaml",
+				prepend_args = {
+					"--config",
+					function()
+						return find_config("markdownlint.yaml")
+					end,
+				},
+				condition = function()
+					return find_config("markdownlint.yaml")
+				end,
 			},
 			selene = {
-				config = "selene.toml",
+				prepend_args = {
+					"--config",
+					function()
+						return find_config("selene.toml")
+					end,
+				},
+				condition = function()
+					return find_config("selene.toml")
+				end,
 			},
 		},
 	},
 }
 
-local function prepend(tbl, items)
-	for i, arg in ipairs(items or {}) do
-		table.insert(tbl, i, arg)
-	end
-	return tbl
-end
-
-local function with_config(args, filename)
-	return prepend(args, {
-		function()
-			local config = unpack(vim.fs.find(filename, {
-				path = vim.api.nvim_buf_get_name(0),
-				upward = true,
-			})) or ("%s/%s"):format(vim.fs.basename(filename), filename)
-			return vim.fn.filereadable(config) == 1 and string.format("--config=%s", config) or ""
-		end,
-	})
-end
-
 function M:init()
-	local linters = self.opts.linters or {}
-	self.opts.linters = setmetatable({}, {
-		__index = function(t, k)
-			local ok, linter = pcall(require, "lint.linters." .. k)
-			if ok and linters[k] then
-				t[k] = vim.tbl_extend("force", { args = {} }, linter, linters[k] or {})
-				prepend(with_config(t[k].args, t[k].config), t[k].prepend_args)
-			end
-			return t[k]
-		end,
-	})
-
 	vim.api.nvim_create_autocmd({ "BufWritePost", "BufReadPost", "InsertLeave" }, {
-		callback = function()
-			require("lint").try_lint()
-		end,
+		group = vim.api.nvim_create_augroup("nvim-lint", { clear = true }),
+		callback = utils.debounce(100, try_lint),
 	})
 end
 
 function M:config(opts)
-	require("lint").linters = opts.linters
-	require("lint").linters_by_ft = opts.linters_by_ft
+	local lint = require("lint")
+
+	for name, linter in pairs(opts.linters) do
+		if type(linter) == "table" and type(lint.linters[name]) == "table" then
+			lint.linters[name] = vim.tbl_deep_extend("force", lint.linters[name], linter)
+			for _, arg in pairs(lint.linters[name].prepend_args) do
+				lint.linters[name].args = lint.linters[name].args or {}
+				table.insert(lint.linters[name].args, arg)
+			end
+		else
+			lint.linters[name] = linter
+		end
+	end
+	lint.linters_by_ft = opts.linters_by_ft
 end
 
 return M
diff --git a/nvim/.config/nvim/lua/tobyvin/utils.lua b/nvim/.config/nvim/lua/tobyvin/utils.lua
index af54cae..61410ce 100644
--- a/nvim/.config/nvim/lua/tobyvin/utils.lua
+++ b/nvim/.config/nvim/lua/tobyvin/utils.lua
@@ -5,6 +5,19 @@ function M.inspect(v)
 	return v
 end
 
+---@param ms integer
+---@param fn function
+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
+
 ---Register callback to run when a lsp server matching a filter attaches to a buffer
 ---@param on_attach fun(client: lsp.Client, buffer: integer): boolean|nil
 ---@param filter vim.lsp.get_clients.filter|nil