[nvim] Remove null-ls in favor of nvim-lint

.config/nvim/lua/plugins/lint.lua

@@ -0,0 +1,26 @@
+-- https://github.com/mfussenegger/nvim-lint
+return {
+    "mfussenegger/nvim-lint",
+    config = function()
+        local lint = require("lint")
+        -- Configure linters by filetype
+        lint.linters_by_ft = {
+            sh = {"shellcheck"},
+        }
+        -- Configure auto commands to trigger linting when opening and writing to disk
+        vim.api.nvim_create_autocmd({"FileType"}, {
+            pattern = "sh",
+            once = true,
+            callback = function()
+                -- Trigger lint whenever writing to disk
+                vim.api.nvim_create_autocmd({"BufWritePost"}, {
+                    callback = function()
+                        lint.try_lint("shellcheck")
+                    end,
+                })
+                -- Trigger linting now
+                lint.try_lint("shellcheck")
+            end,
+        })
+    end,
+}

.config/nvim/lua/plugins/nullls.lua

@@ -1,16 +0,0 @@
--- https://github.com/jose-elias-alvarez/null-ls.nvim
-return {
-    "jose-elias-alvarez/null-ls.nvim",
-    dependencies = {
-        {"nvim-lua/plenary.nvim"},
-    },
-    config = function()
-        local null_ls = require("null-ls")
-        local opts = {
-            sources = {
-                null_ls.builtins.diagnostics.shellcheck,
-            },
-        }
-        null_ls.setup(opts)
-    end,
-}