Merge pull request #4121 from xmake-io/luadbg

Add lua debugger

2 files changed, 83 insertions, 2 deletions

diff --git a/xmake/core/base/debugger.lua b/xmake/core/base/debugger.lua
new file mode 100644
index 000000000..87762bceb
--- /dev/null
+++ b/xmake/core/base/debugger.lua
@@ -0,0 +1,72 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+-- Copyright (C) 2015-present, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        debugger.lua
+--
+
+-- define module
+local debugger = {}
+
+-- load modules
+local os        = require("base/os")
+local path      = require("base/path")
+
+-- start emmylua debugger
+--
+-- e.g.
+--
+-- xrepo env -b emmylua_debugger xmake --version
+--
+function debugger:_start_emmylua_debugger()
+    local debugger_libfile = os.getenv("EMMYLUA_DEBUGGER")
+    local script, errors = package.loadlib(debugger_libfile, "luaopen_emmy_core")
+    if not script then
+        return false, errors
+    end
+    local debugger_inst = script()
+    if not debugger_inst then
+        return false, "cannot get debugger module!"
+    end
+    debugger_inst.tcpListen("localhost", 9966)
+    debugger_inst.waitIDE()
+    debugger_inst.breakHere()
+    return true
+end
+
+-- start debugging
+function debugger:start()
+    if self:has_emmylua() then
+        return self:_start_emmylua_debugger()
+    end
+end
+
+-- has emmylua debugger?
+function debugger:has_emmylua()
+    local debugger_libfile = os.getenv("EMMYLUA_DEBUGGER")
+    if debugger_libfile and os.isfile(debugger_libfile) then
+        return true
+    end
+end
+
+-- debugger is enabled?
+function debugger:enabled()
+    return self:has_emmylua()
+end
+
+-- return module
+return debugger
+
diff --git a/xmake/core/main.lua b/xmake/core/main.lua
index bb883d659..796a69b44 100644
--- a/xmake/core/main.lua
+++ b/xmake/core/main.lua
@@ -40,6 +40,7 @@ local config        = require("project/config")
 local project       = require("project/project")
 local localcache    = require("cache/localcache")
 local profiler      = require("base/profiler")
+local debugger      = require("base/debugger")
 
 -- init the option menu
 local menu =
@@ -139,6 +140,14 @@ end
 -- the init function for main
 function main._init()
 
+    -- start debugger
+    if debugger:enabled() then
+        local ok, errors = debugger:start()
+        if not ok then
+            return false, errors
+        end
+    end
+
     -- disable scheduler first
     scheduler:enable(false)
 
@@ -148,9 +157,9 @@ function main._init()
     -- e.g. `xmake f -c -P xxx` will be parsed as `-c=-P`, it's incorrect.
     --
     -- maybe we will improve this later
-    local options, err = main._basicparse()
+    local options, errors = main._basicparse()
     if not options then
-        return false, err
+        return false, errors
     end
 
     -- init project paths only for xmake engine