feat: initial release

lua/tiny-lightbulb/init.lua

@@ -0,0 +1,55 @@
+local M = {}
+
+function M.setup(opts)
+  opts = vim.tbl_extend("force", {
+    sign = "💡",
+    hl = "DiagnosticWarn",
+    priority = 10,
+  }, opts or {})
+
+  local ns = vim.api.nvim_create_namespace("tiny-lightbulb")
+  local gen = 0
+
+  local function clear()
+    gen = gen + 1
+    vim.api.nvim_buf_clear_namespace(0, ns, 0, -1)
+  end
+
+  vim.api.nvim_create_autocmd({ "CursorHold", "CursorHoldI" }, {
+    group = vim.api.nvim_create_augroup("tiny-lightbulb", { clear = true }),
+    callback = function()
+      local buf, lnum = vim.api.nvim_get_current_buf(), vim.fn.line(".") - 1
+      clear()
+      if #vim.lsp.get_clients({ bufnr = buf, method = "textDocument/codeAction" }) == 0 then
+        return
+      end
+      local id = gen
+      vim.lsp.buf_request(buf, "textDocument/codeAction", {
+        textDocument = vim.lsp.util.make_text_document_params(buf),
+        range = { start = { line = lnum, character = 0 }, ["end"] = { line = lnum, character = 0 } },
+        context = { diagnostics = vim.diagnostic.get(buf, { lnum = lnum }) },
+      }, function(err, results)
+        if
+          id == gen
+          and not err
+          and results
+          and #results > 0
+          and vim.api.nvim_buf_is_valid(buf)
+        then
+          vim.api.nvim_buf_set_extmark(buf, ns, lnum, 0, {
+            sign_text = opts.sign,
+            sign_hl_group = opts.hl,
+            priority = opts.priority,
+          })
+        end
+      end)
+    end,
+  })
+
+  vim.api.nvim_create_autocmd({ "CursorMoved", "CursorMovedI", "InsertEnter" }, {
+    group = vim.api.nvim_create_augroup("tiny-lightbulb-clear", { clear = true }),
+    callback = clear,
+  })
+end
+
+return M