From 06afc9babca12e8ae557c5a9aaf5a7f78ba35399 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Mon, 4 Mar 2019 03:54:29 +0100
Subject: build: support windows

TDM is old and ugly, but musl.cc is having issues right now.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 .gitignore |  1 +
 README.md  | 24 +++++++++++-------------
 build.bat  | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 64 insertions(+), 13 deletions(-)
 create mode 100644 build.bat

diff --git a/.gitignore b/.gitignore
index 1cf866a4..494c3301 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 *.syso
 .tmp
 .idea
+deps
diff --git a/README.md b/README.md
index 9772c996..2795c484 100644
--- a/README.md
+++ b/README.md
@@ -4,28 +4,26 @@ Nothing to see here yet. Come back later.
 
 ### Requirements
 
-  - [Go ≥1.12](https://www.golang.org)
   - [Wintun](https://git.zx2c4.com/wintun)
 
-### Clone
+### Building on Windows
 
-This has a few submodules at the moment, so you'll need to clone recursively. While building (below) uses WSL, it's recommended that you still clone into Windows per usual.
+The build script will take care of downloading (without verification) and installing Go 1.12 and Mingw.
 
 ```
-$ cd Projects
-$ git clone --recursive https://git.zx2c4.com/wireguard-windows
+C:\Projects> git clone https://git.zx2c4.com/wireguard-windows
+C:\Projects> cd wireguard-windows
+C:\Projects\wireguard-windows> build
 ```
 
-### Building
+### Building on Linux
 
-The use of cgo/mingw makes it slightly easier to compile from WSL. Here are instructions for [Ubuntu 18.04 from the Windows Store](https://www.microsoft.com/en-us/p/ubuntu-1804-lts/9n9tngvndl3q) on WSL:
+You must first have Go 1.12 and Mingw installed.
 
 ```
-$ sudo apt update
-$ sudo apt install mingw-w64 make
-$ curl https://dl.google.com/go/go1.12.linux-amd64.tar.gz | tar xzf -
-$ export PATH="$PWD/go/bin:$PATH"
-$ cd /mnt/c/Users/YourUsername/Projects/wireguard-windows
+$ sudo apt install mingw-w64 golang-go
+$ git clone https://git.zx2c4.com/wireguard-windows
+$ cd wireguard-windows
 $ make
 ```
 
@@ -34,5 +32,5 @@ $ make
 After you've built the application, run `wireguard.exe` to install the manager service and show the UI.
 
 ```
-$ ./wireguard.exe
+C:\Projects\wireguard-windows> wireguard
 ```
diff --git a/build.bat b/build.bat
new file mode 100644
index 00000000..e440e56c
--- /dev/null
+++ b/build.bat
@@ -0,0 +1,52 @@
+@echo off
+set STARTDIR=%cd%
+set OLDPATH=%PATH%
+if not exist deps\.prepared call :installdeps
+set PATH=%STARTDIR%\deps\tdm\bin\;%STARTDIR%\deps\go\bin\;%PATH%
+set CC=x86_64-w64-mingw32-gcc.exe
+set GOOS=windows
+set GOARCH=amd64
+set GOPATH=%STARTDIR%\deps\gopath
+set GOROOT=%STARTDIR%\deps\go
+set CGO_ENABLED=1
+echo Assembling resources
+go run github.com/akavel/rsrc -manifest ui/manifest.xml -ico ui/icon/icon.ico -arch amd64 -o resources.syso || goto :error
+echo Building program
+go build -ldflags="-H windowsgui" -o wireguard.exe || goto :error
+goto :out
+
+:installdeps
+	rmdir /s /q deps 2> NUL
+	mkdir deps || goto :error
+	cd deps || goto :error
+	echo Downloading golang
+	curl -#o go.zip https://dl.google.com/go/go1.12.windows-amd64.zip || goto :error
+	echo Downloading gcc
+	curl -#Lo gcc.zip https://sourceforge.net/projects/tdm-gcc/files/TDM-GCC%%205%%20series/5.1.0-tdm64-1/gcc-5.1.0-tdm64-1-core.zip || goto :error
+	echo Downloading binutils
+	curl -#Lo binutils.zip https://sourceforge.net/projects/tdm-gcc/files/GNU%%20binutils/binutils-2.25-tdm64-1.zip || goto :error
+	echo Downloading mingw64rt
+	curl -#Lo mingw64rt.zip https://sourceforge.net/projects/tdm-gcc/files/MinGW-w64%%20runtime/GCC%%205%%20series/mingw64runtime-v4-git20150618-gcc5-tdm64-1.zip
+	echo Extracting golang
+	tar -xf go.zip || goto :error
+	mkdir tdm || goto :error
+	cd tdm || goto :error
+	echo Extracting gcc
+	tar -xf ..\gcc.zip || goto :error
+	echo Extracting binutils
+	tar -xf ..\binutils.zip || goto :error
+	echo Extracting mingw64rt
+	tar -xf ..\mingw64rt.zip || goto :error
+	cd .. || goto :error
+	echo Cleaning up
+	del go.zip gcc.zip binutils.zip mingw64rt.zip || goto :error
+	copy /y NUL .prepared > NUL || goto :error
+	cd .. || goto :error
+	exit /b
+
+:error
+	echo Failed with error #%errorlevel%.
+:out
+	set PATH=%OLDPATH%
+	cd %STARTDIR%
+	exit /b %errorlevel%
-- 
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