feat(builtins): add gotests support in code actions

lua/null-ls/builtins/code_actions/gotests.lua

@@ -0,0 +1,89 @@
+local h = require("null-ls.helpers")
+local log = require("null-ls.logger")
+local methods = require("null-ls.methods")
+
+local CODE_ACTION = methods.internal.CODE_ACTION
+
+return h.make_builtin({
+    name = "gotests",
+    meta = {
+        url = "https://github.com/cweill/gotests",
+        description = "Go tool to generate tests",
+        notes = { "Requires installing the Go tree-sitter parser." },
+    },
+    method = CODE_ACTION,
+    filetypes = { "go" },
+    can_run = function()
+        return require("null-ls.utils").is_executable("gotests")
+    end,
+    generator_opts = {
+        command = "gotests",
+        args = { "-w" },
+    },
+    factory = function(opts)
+        return {
+            fn = function(params)
+                local bufnr = params.bufnr
+                local bufname = params.bufname
+                local row = params.range.row
+                local col = params.range.col
+
+                local exec = function(cmd_opts)
+                    local cmd = table.concat(cmd_opts, " ")
+                    local output = vim.fn.system(cmd)
+                    if vim.api.nvim_get_vvar("shell_error") == 0 then
+                        vim.fn.execute(":e " .. bufname) -- reload the file
+                    else
+                        log:error(output) -- print the error message
+                    end
+                end
+                local add_function_test = function(fn_name)
+                    return {
+                        title = "gtests: add test for function: " .. fn_name,
+                        action = function()
+                            local cmd_opts = vim.list_extend({ opts.command }, opts.args or {})
+                            vim.list_extend(cmd_opts, { "--only", fn_name })
+                            vim.list_extend(cmd_opts, { bufname })
+                            return exec(cmd_opts)
+                        end,
+                    }
+                end
+                local add_package_test = function(pkg_name)
+                    return {
+                        title = "gotests: add tests for package: " .. pkg_name,
+                        action = function()
+                            local cmd_opts = vim.list_extend({ opts.command }, opts.args or {})
+                            vim.list_extend(cmd_opts, { "--all" })
+                            vim.list_extend(cmd_opts, { vim.fn.expand("%:p:h") })
+                            return exec(cmd_opts)
+                        end,
+                    }
+                end
+
+                -- Main
+                local tsnode = vim.treesitter.get_node_at_pos(bufnr, row - 1, col - 1, {})
+                local actions = {}
+                local package_name
+                local function_name
+
+                -- Ops on function name
+                if (tsnode:type()) == "identifier" then
+                    function_name = vim.treesitter.query.get_node_text(tsnode, 0)
+                    if function_name == nil then
+                        return
+                    end
+
+                    table.insert(actions, add_function_test(function_name))
+                end
+                if (tsnode:type()) == "package_clause" then
+                    local tscnode = tsnode:child(1)
+                    if tscnode ~= nil and (tscnode:type() == "package_identifier") then
+                        package_name = vim.treesitter.query.get_node_text(tscnode, 0)
+                    end
+                    table.insert(actions, add_package_test(package_name))
+                end
+                return actions
+            end,
+        }
+    end,
+})