scrunge, qode

Not only is it particular about it's cwd and exe name, it's
particular about it's command line arguments. scrunge scringe scrin

Makefile

@@ -18,6 +18,12 @@ build: clean dist/index.js
 	move $(build) $@
 	$(rcedit) $@/qode.exe --set-icon misc/icon.ico
 
+f: build/$(name).exe
+	./$<
+
+build/$(name).exe: src/stub.c
+	clang $< -Ofast -o $@
+
 clean:
 	-rd /s /q dist deploy build
 

src/gui.js

@@ -11,6 +11,7 @@ const {
    QListWidget,
    QListWidgetItem,
    QIcon,
+   QMessageBox,
 } = require("@nodegui/nodegui");
 
 const win = new QMainWindow;
@@ -207,3 +208,10 @@ go_button.addEventListener("clicked", () => {
 
 win.show();
 global.win = win;
+
+for (const arg of process.argv) {
+   console.log(arg);
+   const qlwi = new QListWidgetItem;
+   qlwi.setText(arg);
+   depth1_list.addItem(qlwi);
+}

src/stub.c

@@ -0,0 +1,86 @@
+#include <wchar.h>
+#define WIN32_LEAN_AND_MEAN
+#include <stdio.h>
+#include <windows.h>
+
+#define qode "qode.exe"
+#define true 1
+#define SETCWDTO "SETCWDTO"
+
+STARTUPINFOW si;
+
+#define LEN(s) (sizeof(s) - 1)
+
+int wmain(int argc, wchar_t *argv[]) {
+   DWORD name_len = 0;
+   wchar_t *name = *argv;
+   int last_backslash = -1;
+
+   wchar_t c;
+   while ((c = name[name_len])) {
+      if (c == L'\\' || c == L'/') {
+         last_backslash = name_len;
+      }
+      name_len++;
+   }
+
+   // includes null byte
+   size_t qode_len = last_backslash + sizeof(qode);
+   for (size_t i = 0; i < sizeof(qode); ++i) {
+      // + 1 because we want to write starting after the '/'
+      name[last_backslash + 1 + i] = qode[i];
+   }
+
+   // name is now `${__dirname}/qode.exe`
+
+   // includes null byte
+   DWORD cwd_len = GetCurrentDirectoryW(0, NULL);
+
+   // the memory layout is going to look like `${__dirname}\0${qode} ${cwd}`
+   wchar_t *dirname = _alloca(
+      sizeof(wchar_t) * (0
+         + last_backslash + LEN("\0")
+         + qode_len + LEN(" ") + LEN(SETCWDTO) + LEN(" ") + cwd_len
+      )
+   );
+
+   for (size_t i = 0; i < last_backslash; ++i) {
+      dirname[i] = name[i];
+   }
+   dirname[last_backslash] = '\0';
+
+   wchar_t *qode_arg = dirname + last_backslash + 1;
+   for (size_t i = 0; i < qode_len; ++i) {
+      qode_arg[i] = name[i];
+   }
+
+   wchar_t *cwd_arg = qode_arg + qode_len;
+   *cwd_arg++ = ' ';
+
+   for (size_t i = 0; i < LEN(SETCWDTO); ++i) {
+      *cwd_arg++ = SETCWDTO[i];
+   }
+
+   GetCurrentDirectoryW(cwd_len, cwd_arg);
+
+   wprintf(L"qode: %s\ndirname: %s\nargs: %s\n", name, dirname, qode_arg);
+
+   PROCESS_INFORMATION pi;
+
+   BOOL success = CreateProcessW(
+      name,    // lpApplicationName
+      qode_arg, // lpCommandLine
+      NULL,    // lpProcessAttributes
+      NULL,    // lpThreadAttributes
+      true,    // bInheritHandles
+      0,       // dwCreationFlags
+      NULL,    // lpEnvironment
+      dirname, // lpCurrentDirectory
+      &si,     // lpStartupInfo
+      &pi      // lpProcessInformation
+   );
+
+   {
+      printf("Error: %lu\n", GetLastError());
+   }
+}