Add gdb debugging capability

.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": "Nim Debug",
+            "type": "gdb",
+            "request": "launch",
+            "target": "${workspaceFolder}\\build\\demo\\demo_glfw_debug.exe",
+            "cwd": "${workspaceRoot}",
+            "gdbpath": "${workspaceFolder}\\nim-gdb.bat",
+            "valuesFormatting": "parseText"
+        }
+    ]
+}

gdbcommands.txt

@@ -1 +0,0 @@
-source C:/Users/jyapa/.choosenim/toolchains/nim-#devel/tools/nim-gdb.py

nanovg.nimble

@@ -17,11 +17,10 @@ requires "nim >= 1.0.0",
 
 import os
 
-task buildSDL2Example, "Build SDL2 example":
-  let buildDir = "build/demosdl2"
+proc setupBuildDir(buildDir: string, prefixes: openArray[string]) =
+  var arch = ""
   if system.existsDir(buildDir):
     rmDir buildDir
-  var arch = ""
   if defined(amd64):
     arch = "64bit"
   else:
@@ -30,24 +29,33 @@ task buildSDL2Example, "Build SDL2 example":
   var files = listFiles "lib/" & arch & "/"
   for fpath in files:
     let fname = fpath.extractFileName()
-    if fname.startsWith("lib") or fname.startsWith("SDL2") or fname.startsWith("glew"):
-      cpFile fpath, buildDir & "/" & fname
+    for prefix in prefixes:
+      if fname.startsWith(prefix):
+        cpFile fpath, buildDir & "/" & fname
+
+proc setupGLFW(): string =
+  switch("define", "useGlfw")
+  let buildDir = "build/demo"
+  setupBuildDir(buildDir, ["gl"])
+  return buildDir
+
+proc setupSDL2(): string =
+  let buildDir = "build/demosdl2"
+  setupBuildDir(buildDir, ["lib", "SDL2", "glew"])
+  return buildDir
+
+task buildSDL2Example, "Build SDL2 example":
+  let buildDir = setupSDL2()
   exec "nim c --app:gui -d:release -d:danger -o:" & buildDir & "/" & "demo_sdl2".toExe & " -r examples/demo_sdl2.nim"
 
+task buildSDL2ExampleDebug, "Build SDL2 example debug":
+  let buildDir = setupSDL2()
+  exec "nim c --app:gui --debugger:native -o:" & buildDir & "/" & "demo_sdl2_debug".toExe & " -r examples/demo_sdl2.nim"
+
 task buildGLFWExample, "Build GLFW example":
-  switch("define", "useGlfw")
-  var arch = ""
-  let buildDir = "build/demo"
-  if system.existsDir(buildDir):
-    rmDir buildDir
-  if defined(amd64):
-    arch = "64bit"
-  else:
-    arch = "32bit"
-  mkDir buildDir
-  var files = listFiles "lib/" & arch & "/"
-  for fpath in files:
-    let fname = fpath.extractFileName()
-    if fname.startsWith("gl"):
-      cpFile fpath, buildDir & "/" & fname
-  exec "nim c --app:gui -d:release -d:danger -o:" & buildDir & "/" & "demo_glfw".toExe & " -r examples/demo.nim"
+  let buildDir = setupGLFW()
+  exec "nim c --app:gui -d:release -d:danger -o:" & buildDir & "/" & "demo_glfw".toExe & " -r examples/demo.nim"
+
+task buildGLFWExampleDebug, "Build GLFW example debug":
+  let buildDir = setupGLFW()
+  exec "nim c --app:gui --debugger:native -o:" & buildDir & "/" & "demo_glfw_debug".toExe & " -r examples/demo.nim"

nim-gdb

@@ -13,7 +13,8 @@ GDB_PYTHON_MODULE_PATH="$NIM_SYSROOT/tools/nim-gdb.py"
 # Run GDB with the additional arguments that load the pretty printers
 # Set the environment variable `NIM_GDB` to overwrite the call to a
 # different/specific command (defaults to `gdb`).
-NIM_GDB="${NIM_GDB:-gdb.exe}"
+NIM_GDB="${NIM_GDB:-gdb}"
+echo "source $GDB_PYTHON_MODULE_PATH" > gdbcommands.txt
 # exec replaces the new process of bash with gdb. It is always good to
 # have fewer processes.
 exec ${NIM_GDB} --command="gdbcommands.txt" "$@"

nim-gdb.bat

@@ -0,0 +1,14 @@
+@echo off
+for %%i in (nim.exe) do (set NIM_BIN=%%~dp$PATH:i)
+
+for %%i in ("%NIM_BIN%\..\") do (set NIM_ROOT=%%~fi)
+
+set @GDB_PYTHON_MODULE_PATH=%NIM_ROOT%\tools\nim-gdb.py
+set @NIM_GDB=gdb.exe
+
+@echo source %@GDB_PYTHON_MODULE_PATH%> wingdbcommand.txt
+
+%@NIM_GDB% --command="wingdbcommand.txt" %*
+
+EXIT /B %ERRORLEVEL%
+@echo on