lint: add clippy

init.lua

@@ -118,7 +118,6 @@ local lsp = require 'lspconfig'
 -- Use an on_attach function to only map the following keys
 -- after the language server attaches to the current buffer
 local on_lsp_attach = function(client, bufnr)
-	vim.pretty_print(bufnr)
 	-- See `:help vim.lsp.*` for documentation on any of the below functions
 	vim.keymap.set('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
 	vim.keymap.set('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
@@ -166,21 +165,84 @@ g.ale_go_golangci_lint_options = ''
 g.ale_go_golangci_lint_package = 1
 ---- nvim-lint ----
 local lint = require 'lint'
+local clippy_format = '%E%f:%l:%c: %\\d%#:%\\d%# %.%\\{-}'
+			.. 'error:%.%\\{-} %m,%W%f:%l:%c: %\\d%#:%\\d%# %.%\\{-}'
+			.. 'warning:%.%\\{-} %m,%C%f:%l %m,%-G,%-G'
+			.. 'error: aborting %.%#,%-G'
+			.. 'error: Could not compile %.%#,%E'
+			.. 'error: %m,%Eerror[E%n]: %m,%-G'
+			.. 'warning: the option `Z` is unstable %.%#,%W'
+			.. 'warning: %m,%Inote: %m,%C %#--> %f:%l:%c'
+
+lint.linters.clippy = {
+	cmd = 'cargo clippy',
+	stdin = false,
+	append_fname = true,
+	args = {},
+	stream = nil, -- ('stdout' | 'stderr' | 'both') configure the stream to which the linter outputs the linting result.
+	ignore_exitcode = false,
+	env = nil,
+	parser = require('lint.parser').from_errorformat(clippy_format)
+}
+
 linters = {
 	bash = {'shellcheck'},
-	go = {'golangcilint',},
+	go = {'golangcilint'},
 	python = {'flake8'},
+	rust = {'clippy'},
 	yaml = {'yamllint'},
 	zsh = {'shellcheck'},
 }
 -- set linters --
 lint.linters_by_ft = linters
 -- set autocommands --
-vim.api.nvim_create_autocmd({ "BufWritePost" }, {
-	callback = function()
-		lint.try_lint(nil, {ignore_errors=true})
-	end,
-})
+for ft, ft_linters in pairs(linters) do
+	local on_change = false
+	local on_write = false
+	for l in pairs(ft_linters) do
+		if lint.linters.l.stdin then
+			on_change = true
+		else
+			on_write = true
+		end
+	end
+	if on_change then
+		vim.api.nvim_create_autocmd(
+			{"FileType"},
+			{
+				pattern=ft,
+				callback = function()
+					vim.api.nvim_create_autocmd(
+						{"TextChanged" },
+						{
+							callback = function()
+								lint.try_lint(nil, {ignore_errors=true})
+							end,
+						}
+					)
+				end
+			}
+		)
+	end
+	if on_write then
+		vim.api.nvim_create_autocmd(
+			{"FileType"},
+			{
+				pattern=ft,
+				callback = function()
+					vim.api.nvim_create_autocmd(
+						{"BufWritePost" },
+						{
+							callback = function()
+								lint.try_lint(nil, {ignore_errors=true})
+							end,
+						}
+					)
+				end
+			}
+		)
+	end
+end
 
 ---- completion-nvim
 local cmp = require'cmp'