Desktop integration (#2073)

* Open stash in system tray on Windows/MacOS
* Add desktop notifications
* MacOS Bundling
* Add binary icon

Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

vendor/github.com/apenwarr/w32/create_process.go

@@ -0,0 +1,152 @@
+// Copyright 2010-2012 The W32 Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package w32
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+var (
+	kernel32 = syscall.NewLazyDLL("kernel32.dll")
+
+	procCreateProcessW      = kernel32.NewProc("CreateProcessW")
+	procTerminateProcess    = kernel32.NewProc("TerminateProcess")
+	procGetExitCodeProcess  = kernel32.NewProc("GetExitCodeProcess")
+	procWaitForSingleObject = kernel32.NewProc("WaitForSingleObject")
+)
+
+// WINBASEAPI WINBOOL WINAPI
+// CreateProcessW (
+// LPCWSTR lpApplicationName,
+// LPWSTR lpCommandLine,
+// LPSECURITY_ATTRIBUTES lpProcessAttributes,
+// LPSECURITY_ATTRIBUTES lpThreadAttributes
+// WINBOOL bInheritHandles
+// DWORD dwCreationFlags
+// LPVOID lpEnvironment
+// LPCWSTR lpCurrentDirectory
+// LPSTARTUPINFOW lpStartupInfo
+// LPPROCESS_INFORMATION lpProcessInformation
+//);
+func CreateProcessW(
+	lpApplicationName, lpCommandLine string,
+	lpProcessAttributes, lpThreadAttributes *SECURITY_ATTRIBUTES,
+	bInheritHandles BOOL,
+	dwCreationFlags uint32,
+	lpEnvironment unsafe.Pointer,
+	lpCurrentDirectory string,
+	lpStartupInfo *STARTUPINFOW,
+	lpProcessInformation *PROCESS_INFORMATION,
+) (e error) {
+
+	var lpAN, lpCL, lpCD *uint16
+	if len(lpApplicationName) > 0 {
+		lpAN, e = syscall.UTF16PtrFromString(lpApplicationName)
+		if e != nil {
+			return
+		}
+	}
+	if len(lpCommandLine) > 0 {
+		lpCL, e = syscall.UTF16PtrFromString(lpCommandLine)
+		if e != nil {
+			return
+		}
+	}
+	if len(lpCurrentDirectory) > 0 {
+		lpCD, e = syscall.UTF16PtrFromString(lpCurrentDirectory)
+		if e != nil {
+			return
+		}
+	}
+
+	ret, _, lastErr := procCreateProcessW.Call(
+		uintptr(unsafe.Pointer(lpAN)),
+		uintptr(unsafe.Pointer(lpCL)),
+		uintptr(unsafe.Pointer(lpProcessAttributes)),
+		uintptr(unsafe.Pointer(lpProcessInformation)),
+		uintptr(bInheritHandles),
+		uintptr(dwCreationFlags),
+		uintptr(lpEnvironment),
+		uintptr(unsafe.Pointer(lpCD)),
+		uintptr(unsafe.Pointer(lpStartupInfo)),
+		uintptr(unsafe.Pointer(lpProcessInformation)),
+	)
+
+	if ret == 0 {
+		e = lastErr
+	}
+
+	return
+}
+
+func CreateProcessQuick(cmd string) (pi PROCESS_INFORMATION, e error) {
+	si := &STARTUPINFOW{}
+	e = CreateProcessW(
+		"",
+		cmd,
+		nil,
+		nil,
+		0,
+		0,
+		unsafe.Pointer(nil),
+		"",
+		si,
+		&pi,
+	)
+	return
+}
+
+func TerminateProcess(hProcess HANDLE, exitCode uint32) (e error) {
+	ret, _, lastErr := procTerminateProcess.Call(
+		uintptr(hProcess),
+		uintptr(exitCode),
+	)
+
+	if ret == 0 {
+		e = lastErr
+	}
+
+	return
+}
+
+func GetExitCodeProcess(hProcess HANDLE) (code uintptr, e error) {
+	ret, _, lastErr := procGetExitCodeProcess.Call(
+		uintptr(hProcess),
+		uintptr(unsafe.Pointer(&code)),
+	)
+
+	if ret == 0 {
+		e = lastErr
+	}
+
+	return
+}
+
+// DWORD WINAPI WaitForSingleObject(
+//   _In_ HANDLE hHandle,
+//   _In_ DWORD  dwMilliseconds
+// );
+
+func WaitForSingleObject(hHandle HANDLE, msecs uint32) (ok bool, e error) {
+
+	ret, _, lastErr := procWaitForSingleObject.Call(
+		uintptr(hHandle),
+		uintptr(msecs),
+	)
+
+	if ret == WAIT_OBJECT_0 {
+		ok = true
+		return
+	}
+
+	// don't set e for timeouts, or it will be ERROR_SUCCESS which is
+	// confusing
+	if ret != WAIT_TIMEOUT {
+		e = lastErr
+	}
+	return
+
+}