debug debugger

* `.vscode/launch.json` helping debugging extension.
* commit debugging workspace (which is being excluded at the
  build time, thankas to .vscodeignore)

Bonus track:
* proper .luacheckrc to check generated lua sources

Author: tsafin

.luacheckrc

@@ -0,0 +1,38 @@
+std = "luajit"
+globals = {"box", "_TARANTOOL", "tonumber64", "utf8"}
+ignore = {
+    -- Accessing an undefined field of a global variable <debug>.
+    "143/debug",
+    -- Accessing an undefined field of a global variable <os>.
+    "143/os",
+    -- Accessing an undefined field of a global variable <string>.
+    "143/string",
+    -- Accessing an undefined field of a global variable <table>.
+    "143/table",
+    -- Unused argument <self>.
+    "212/self",
+    -- Redefining a local variable.
+    "411",
+    -- Redefining an argument.
+    "412",
+    -- Shadowing a local variable.
+    "421",
+    -- Shadowing an upvalue.
+    "431",
+    -- Shadowing an upvalue argument.
+    "432",
+    -- Unused variable with `_` prefix.
+    "212/_.*",
+    -- Unused loop variable with `_` prefix.
+    "213/_.*",
+}
+
+include_files = {
+    "**/*.lua",
+}
+
+exclude_files = {
+    "debug-workspace/*.lua",
+    ".rocks/**/*.lua",
+    ".git/**/*.lua",
+}

.vscode/launch.json

@@ -7,12 +7,13 @@
       "request": "launch",
       "runtimeExecutable": "${execPath}",
       "args": [
-        "--extensionDevelopmentPath=${workspaceFolder}"
+        "--extensionDevelopmentPath=${workspaceFolder}",
+        "${workspaceFolder}/debug-workspace"
       ],
       "outFiles": [
         "${workspaceFolder}/**/*.js"
       ],
-      // "preLaunchTask": "npm: watch"
+      "preLaunchTask": "Build Debugger"
     },
     {
       "name": "Server",

debug-workspace/.vscode/launch.json

@@ -0,0 +1,18 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Tarantool Lua Debug",
+            "type": "lua-tarantool",
+            "request": "launch",
+            "program": {
+                "tarantool": "/home/tsafin/datetime/tarantoolt/build/src/tarantool",
+                "file": "${file}",
+            },
+            "args": ["-1", "-2", "-3"]
+        }
+    ]
+}

debug-workspace/debug-dbg.lua

@@ -0,0 +1,33 @@
+local date = require 'datetime'
+local fiber = require('fiber')
+
+print(#arg)
+for i = -1,#arg,1 do
+    if arg[i] ~= nil then
+        print('arg['..i..'] = ' .. arg[i])
+    end
+end
+print('1.out:', fiber.id())
+local function fiber_function()
+    print('1.in:', "I'm a fiber")
+    print('2.in:', fiber.id())
+    fiber.yield()
+    fiber.sleep(10)
+    print('3.in:')
+end
+print('2.out:', fiber.id())
+
+local fiber_object = fiber.create(fiber_function)
+print('3.out:', "Fiber started")
+
+local T = date.new{hour = 3, tzoffset = '+0300'}
+print('4.out:', T)
+
+local fmt = '%Y-%m-%dT%H%M%z'
+local S  = T:format(fmt)
+print('5.out:', S)
+local T1 = date.parse(S, {format = fmt})
+print('6.out:', T1)
+fiber.sleep(30)
+
+os.exit(0)