Single pump for both lua and mdb outputs

Do I continue like this? or just integrate the mdb runner itself into
luadebug?

.lite_project.lua

@@ -4,7 +4,7 @@ config.plugins.jpdebug = {
   targets = {
     ["test - msys"] = {
       type = "shell",
-      cmd = {"C:\\msys64\\msys2_shell.cmd", "-defterm", "-here", "-no-start", "-ucrt64", "-shell", "bash", "-c", "lua test.lua"}
+      cmd = {"C:\\msys64\\ucrt64\\bin\\lua.exe", "test.lua"}
     },
     ["test"] = {
       type = "shell",
@@ -14,7 +14,8 @@ config.plugins.jpdebug = {
       type = "luadebug",
       entry = "test.lua",
       cwd = ".",
-      lua = {"lua"},
+      -- lua = {"lua"},
+      lua = {"C:\\msys64\\ucrt64\\bin\\lua.exe"},
     },
   },
   default_target = "luadebug"

debugger.lua

@@ -2,72 +2,137 @@ local core = require "core"
 
 ---@class runner
 local runner = {
-  new = function(self, o) end, ---@meta
+  new = function(self, o)
+    o = o or {}
+    setmetatable(o, self)
+    self.__index = self
+    return o
+  end,
+
+  caps = {
+    can_pause = false,
+    can_continue = false,
+    can_step_in = false,
+    can_step_over = false,
+    can_step_out = false,
+    can_breakpoints = false,
+    has_stack = false,
+    has_locals = false,
+    can_eval = false,
+  },
+
   run = function(self, target, name) end,  ---@meta
-  wait = function(sefl, time) end,  ---@meta 
+  pause = function(self) end, --@meta
+  continue = function(self) end, --@meta
+  step_in = function(self) end, --@meta
+  step_over = function(self) end, --@meta
+  step_out = function(self) end, --@meta
+
+  wait = function(self, time) end,  ---@meta 
   kill = function(self) end, ---@meta 
-  terminate = function(self) end, ---@meta 
+  terminate = function(self) end, ---@meta
+
+  -- Callbacks
+  log = function(msg) end, ---@meta
+  error = function(msg) end, ---@meta
+  on_stdout = function(msg) end, ---@meta
+  on_stderr = function(msg) end, ---@meta
+  on_exit = function(exitcode) end, ---@meta
+  on_state = function(state) end, ---@meta
+  on_break = function(file, line, reason) end, --@meta
+  on_stack = function(frames) end, ---@meta
+  on_locals = function(frame, vars) end, ---@meta
+  on_evaluated = function(expr, ok, value) end, ---@meta
 }
 
-local debugger = {}
+local debugger = {
-local debugwindow = nil ---@type JPDebugView
+  runner = runner, -- Set here as member to let runners extend this base class
-local debugrunner = nil ---@type runner|nil
+  debugwindow = nil, ---@type JPDebugView
+  debugrunner = nil, ---@type runner|nil
+  state = "idle",
+}
 
 function debugger.log(msg)
   core.log("[jpdebug][debugger] %s", msg)
-  if debugwindow then debugwindow:push("meta", "debugger] "..msg) end
+  if debugger.debugwindow then debugger.debugwindow:push("meta", "debugger] "..msg) end
 end
 
 function debugger.error(msg)
   core.error("[jpdebug][debugger]"..msg)
-  if debugwindow then debugwindow:push("meta", "debugger] ERROR: "..msg) end
+  if debugger.debugwindow then debugger.debugwindow:push("meta", "debugger] ERROR: "..msg) end
 end
 
-function debugger.stdout(msg)
+function debugger.on_stdout(msg)
-  if debugwindow then debugwindow:push("stdout", msg) end
+  if debugger.debugwindow then debugger.debugwindow:push("stdout", msg) end
 end
 
-function debugger.stderr(msg)
+function debugger.on_stderr(msg)
-  if debugwindow then debugwindow:push("stderr", msg) end
+  if debugger.debugwindow then debugger.debugwindow:push("stderr", msg) end
 end
 
 function debugger.is_running()
-  return debugrunner~=nil
+  return debugger.debugrunner~=nil
+end
+
+function debugger.on_state(state)
+  debugger.log(string.format("state %s -> %s", debugger.state, state))
+  debugger.state = state
+end
+
+function debugger.on_break(file, line, reason)
+  debugger.log(string.format("breakpoint hit: %s:%d", file, line))
+  -- Temporary continue at unknown breaks
+  if file=='?' and line==-1 then
+    if debugger.debugrunner.caps.can_continue then
+      debugger.debugrunner:continue()
+    end
+  end
 end
 
 function debugger.run(target, name, r, view)
-  debugwindow = view
+  if debugger.debugrunner then
-  debugwindow:clear()
+    if debugger.state == "paused" then
+      debugger.debugrunner:continue()
+    else
+      debugger.error("Already an active session")
+    end
+    return
+  end
+  debugger.debugwindow = view
+  debugger.debugwindow:clear()
   debugger.log(string.format("Running %s", name))
 
   -- Create new runner object
-  debugrunner = r:new({
+  debugger.debugrunner = r:new({
+    -- Set callbacks
     log = debugger.log,
     error = debugger.error,
-    stdout = debugger.stdout,
+    on_stdout = debugger.on_stdout,
-    stderr = debugger.stderr,
+    on_stderr = debugger.on_stderr,
-    exited = debugger.exited,
+    on_exit = debugger.on_exit,
+    on_state = debugger.on_state,
+    on_break = debugger.on_break,
   })
   -- And run
-  debugrunner:run(target, name)
+  debugger.debugrunner:run(target, name)
 end
 
 function debugger.stop()
-  if debugrunner then
+  if debugger.debugrunner then
-    debugrunner:kill()
+    debugger.debugrunner.on_exit = function() end
-    local exitcode = debugrunner:wait(1000)
+    debugger.debugrunner:kill()
+    local exitcode = debugger.debugrunner:wait(1000)
     -- TODO terminate if needed
-    debugger.log(string.format("... Stoped: %d", exitcode))
+    debugger.log(string.format("... Stoped with exit code %d", exitcode))
   end
-  debugrunner = nil
+  debugger.debugrunner = nil
+  debugger.on_state('idle')
 end
 
-function debugger.exited()
+function debugger.on_exit(exitcode)
-  if debugrunner then
+  debugger.log(string.format("exit: %d", exitcode))
-    local exitcode = debugrunner:wait(process.WAIT_INFINITE)
+  debugger.debugrunner = nil
-    debugger.log(string.format("exit: %d", exitcode))
+  debugger.on_state('idle')
-  end
-  debugrunner = nil
 end
 
 return debugger

init.lua

@@ -153,19 +153,30 @@ local function get_selected_target()
 end
 
 -- ---------- run target & pipe stdout/stderr into the view ----------
+local function ensure_debug_view()
+  if active_view then
+    return active_view
+  end
+
+  local node = core.root_view:get_active_node()
+  local view = JPDebugView()
+
+  -- Defer the add until the node is unlocked (next tick).
+  core.add_thread(function()
+    -- Wait until the layout is safe to mutate
+    while node.locked do coroutine.yield(0) end
+    node:add_view(view)
+    core.redraw = true
+  end)
+
+  active_view = view
+  return view
+end
+
 local function run_target(target, name)
   -- Create/get view to push text to
   -- TODO fix this, it throws a node is locked error once in a while
-  local view = nil
+  local view = ensure_debug_view()
-  if active_view then
-    -- If there is already a view use that one
-    view = active_view
-  else
-    -- Otherwhise lets make one
-    view = JPDebugView()
-    core.root_view:get_active_node():add_view(view)
-    active_view = view
-  end
 
   -- Check if we have a runner
   for runner_name,runner in pairs(core.jpdebug.runners) do
@@ -233,6 +244,11 @@ if required_toolbar_plugins and ToolbarView then
     else
       table.insert(t, {symbol = "D", command = "jpdebug:stop"})
     end
+
+    if debugger.is_running() then
+      if debugger.debugrunner.caps.can_pause then table.insert(t, {symbol="C",command=""}) end
+    end
+
     table.insert(t, {symbol = "E", command = "jpdebug:reload-runners"})
     self.toolbar_commands = t
   end

runners/luadebug.lua

@@ -1,5 +1,6 @@
 local core = require "core"
 local process = require "process"
+local debugger = require "plugins.jpdebug.debugger"
 
 -- tiny helpers
 local function dirname(p) return p:match("^(.*)[/\\]") or "" end
@@ -14,8 +15,95 @@ local function get_plugin_root()
   return dirname(here)                         -- …/jpdebug
 end
 
+-- Check if string starts with a substring
+local function starts_with(str, word)
+  return str:sub(1, #word) == word
+end
+
+-- ------------------- Runner API --------------------------------
+
+---@class luadebug: runner
+local luadebug = debugger.runner:new({
+  name = "luadebug",
+  proc = nil, ---@type process|nil
+
+  caps = {
+    can_pause = false,
+    can_continue = true,
+    can_step_in = true,
+    can_step_over = true,
+    can_step_out = true,
+    can_breakpoints = true,
+    has_stack = true,
+    has_locals = true,
+    can_eval = false,
+  },
+})
+
+function luadebug:run(target, name)
+  if target.entry == nil then
+    self.error("target.entry is required for "..name)
+    return
+  end
+  local entry = target.entry
+  local lua = target.lua or "lua"
+  local cwd = target.cwd or "."
+  local env = target.env or {}
+
+  -- spawn the debugger
+  self:spawn_mdb(lua)
+  -- TODO error checking
+
+  -- spawn the main lua process
+  local proc = self:spawn_lua_process(entry, lua, cwd, env)
+  if proc == nil then
+    self.error("Failed to start "..entry)
+    -- TODO kill mdb
+    return
+  end
+  self.proc = proc
+
+  self.on_state('connecting')
+
+  -- Start output pump
+  self:pumps()
+end
+
+function luadebug:continue()
+  self.mdb:write('run\n')
+  self.on_state('running')
+end
+
+function luadebug:wait(time)
+  if not self.proc then return end
+  return self.proc:wait(time)
+end
+
+function luadebug:read_stdout()
+  if not self.proc then return end
+  local sl = self.proc:read_stdout()
+  return sl
+end
+
+function luadebug:read_stderr()
+  if not self.proc then return end
+  local sl = self.proc:read_stderr()
+  return sl
+end
+
+function luadebug:kill()
+  if not self.proc then return end
+  self.proc:kill()
+end
+
+function luadebug:terminate()
+  if not self.proc then return end
+  self.proc:terminate()
+end
+
+-- --------------- Lua Process -----------------------------------
 -- Main lua process spawner
-local function spawn_lua_process(entry, lua, cwd, env)
+function luadebug:spawn_lua_process(entry, lua, cwd, env)
   local host = "localhost"
   local port = 8172
 
@@ -26,13 +114,17 @@ local function spawn_lua_process(entry, lua, cwd, env)
   local dbg_call = string.format([[
     local ok, m = pcall(require, "mobdebug"); if ok then
       print("Connecting to "..%q..":"..tostring(%d))
+      m.connecttimeout = 0.1
       local connected = m.start(%q, %d)
+      if not connecten then m.off() end
     end
+    print("Test123")
   ]], host, port, host, port)
   local launcher = string.format([[
     package.path = %q .. ";" .. package.path
     %s
     dofile(%q)
+    os.exit()
   ]], vendor_glob, dbg_call, entry)
 
   -- Spawn the process
@@ -50,66 +142,92 @@ local function spawn_lua_process(entry, lua, cwd, env)
     stdout = process.REDIRECT_PIPE,
     stderr = process.REDIRECT_PIPE,
   })
+
   return proc
 end
 
----@class LDB
+-- ---------------- Mobdebug -------------------------------------
-local LDB = {
+function luadebug:spawn_mdb(lua)
-  name = "luadebug"
+  local host = "localhost"
-}
+  local port = 8172
 
----@param target table Target table
+  -- Resolve vendor/?.lua so "require('mobdebug')" finds the bundled file
----@param name string Name of the target to run
+  local vendor_glob = join(get_plugin_root(), "vendor/?.lua")
----@praam debuginfo table Debugging information
+
----@return process|nil
+  local cmd = {}
-function LDB:run(target, name, debuginfo)
+  if type(lua) == "table" then
-  if target.entry == nil then
+    for i=1, #lua do table.insert(cmd, lua[i]) end
-    core.error("[jpdebug][luadebug] target.entry is required")
+  else
+    table.insert(cmd, lua)
+  end
+  table.insert(cmd, "-e")
+  table.insert(cmd, string.format([[
+    package.path = %q .. ";" .. package.path
+    require("mobdebug").listen(%s, %d)
+    os.exit()
+  ]], vendor_glob, host, port))
+
+  local proc = process.start(cmd, {
+    stdout = process.REDIRECT_PIPE,
+    stderr = process.REDIRECT_PIPE,
+  })
+  if proc == nil then
+    self.error("Failed to start debugger")
     return
   end
-  local entry = target.entry
-  local lua = target.lua or "lua"
-  local cwd = target.cwd or "."
-  local env = target.env or {}
 
-  -- spawn the main lua process
+  self.mdb = proc
-  local proc = spawn_lua_process(entry, lua, cwd, env)
-
-  if proc == nil then
-    core.error("[jpdebug][luadebug] Failed to start "..entry)
-    return nil
-  end
-
-  return {
-    luaproc=proc
-  }
 end
 
--- Wait untill it ends, possibly with timeout
+-- ---------------- Pumps  ---------------------------------------
-function LDB:wait(proc, time)
+function luadebug:pumps()
-  return proc.luaproc:wait(time)
+  core.add_thread(function()
+    while true do
+      core.redraw = true
+      coroutine.yield(0.016) -- 60FPS
+
+       -- LUA PROGRAM OUTPUT
+      if true then
+        local sout = self.proc:read_stdout()
+        local serr = self.proc:read_stderr()
+
+        if sout == nil or serr == nil then
+          -- Make sure to read stderr for the last time
+          if serr and serr~="" then self.on_stderr(serr) end
+          local exitcode = self.proc:wait(process.WAIT_INFINITE)
+          self.on_exit(exitcode)
+          break
+        end
+        if sout and sout~="" then self.on_stdout(sout) end
+        if serr and serr~="" then self.on_stderr(serr) end
+      end
+      
+      -- MDB OUTPUT  
+      if true then
+        local sout = self.mdb:read_stdout()
+        local serr = self.mdb:read_stderr()
+
+        if sout == nil or serr == nil then
+          -- Make sure to read stderr for the last time
+          if serr and serr~="" then self.on_stderr(serr) end
+          local exitcode = self.proc:wait(process.WAIT_INFINITE)
+          self.on_exit(exitcode)
+          break
+        end
+        if sout and sout~="" then self.on_stdout("mdb> "..sout) end
+        if serr and serr~="" then self.on_stderr("mdb> "..serr) end
+
+        if sout and sout~="" then
+          -- Check output
+          if starts_with(sout, "Paused") then
+            self.on_state('paused')
+            self.on_break('?', -1, 'paused')
+          end
+        end
+      end
+    end
+  end)
 end
 
--- Read the stdout, returns nil if process has stopped
-function LDB:read_stdout(proc)
-  local sl = proc.luaproc:read_stdout()
-  return sl
-end
 
--- Read the stderr
+return luadebug
-function LDB:read_stderr(proc)
-  local sl = proc.luaproc:read_stderr()
-  return sl
-end
-
--- Kill the process
-function LDB:kill(proc)
-  proc.luaproc:kill()
-end
-
--- Terminate the process
-function LDB:terminate(proc)
-  proc.luaproc:terminate()
-end
-
-return LDB

runners/shell.lua

@@ -1,30 +1,12 @@
 local core = require "core"
 local process  = require "process"
+local debugger = require "plugins.jpdebug.debugger"
 
 ---@class shell: runner
-local shell = {
+local shell = debugger.runner:new({
   name = "shell",
   proc = nil ---@type process|nil
-}
+})
-
-function shell:new(o)
-  o = o or {}
-  setmetatable(o, self)
-  self.__index = self
-  return o
-end
-
----@meta
-function shell.log(msg) end
----@meta
-function shell.error(msg) end
----@meta
-function shell.stdout(msg) end
----@meta
-function shell.stderr(msg) end
----@meta
-function shell.exited() end
-
 
 function shell:run(target, name)
   local opts = {
@@ -43,6 +25,8 @@ function shell:run(target, name)
     self.error(string.format("command not specified for target %s", name))
   end
 
+  self.on_state('running')
+
   -- output pump
   core.add_thread(function()
     while true do
@@ -50,12 +34,15 @@ function shell:run(target, name)
       coroutine.yield(0.016) -- 60FPS
       local sout = self.proc:read_stdout()
       local serr = self.proc:read_stderr()
-      if sout == nil and serr == nil then
+      if sout == nil or serr == nil then
-        self.exited()
+        -- Make sure to read stderr for the last time
+        if serr and serr~="" then self.on_stderr(serr) end
+        local exitcode = self.proc:wait(process.WAIT_INFINITE)
+        self.on_exit(exitcode)
         break
       end
-      if sout and sout~="" then self.stdout(sout) end
+      if sout and sout~="" then self.on_stdout(sout) end
-      if serr and serr~="" then self.stderr(serr) end
+      if serr and serr~="" then self.on_stderr(serr) end
     end
   end)
 end