:: Copyright 2012 The Go Authors. All rights reserved.
:: Use of this source code is governed by a BSD-style
:: license that can be found in the LICENSE file.

:: Environment variables that control make.bat:
::
:: GOROOT_FINAL: The expected final Go root, baked into binaries.
:: The default is the location of the Go tree during the build.
::
:: GOHOSTARCH: The architecture for host tools (compilers and
:: binaries).  Binaries of this type must be executable on the current
:: system, so the only common reason to set this is to set
:: GOHOSTARCH=386 on an amd64 machine.
::
:: GOARCH: The target architecture for installed packages and tools.
::
:: GOOS: The target operating system for installed packages and tools.
::
:: GO_GCFLAGS: Additional 5g/6g/8g arguments to use when
:: building the packages and commands.
::
:: GO_LDFLAGS: Additional 5l/6l/8l arguments to use when
:: building the commands.
::
:: CGO_ENABLED: Controls cgo usage during the build. Set it to 1
:: to include all cgo related files, .c and .go file with "cgo"
:: build directive, in the build. Set it to 0 to ignore them.

@echo off

:: Keep environment variables within this script
:: unless invoked with --no-local.
if x%1==x--no-local goto nolocal
if x%2==x--no-local goto nolocal
setlocal
:nolocal

set GOBUILDFAIL=0

if exist make.bat goto ok
echo Must run make.bat from Go src directory.
goto fail 
:ok

:: Clean old generated file that will cause problems in the build.
del /F ".\pkg\runtime\runtime_defs.go" 2>NUL

:: Grab default GOROOT_FINAL and set GOROOT for build.
:: The expression %VAR:\=\\% means to take %VAR%
:: and apply the substitution \ = \\, escaping the
:: backslashes.  Then we wrap that in quotes to create
:: a C string.
cd ..
set GOROOT=%CD%
cd src
if "x%GOROOT_FINAL%"=="x" set GOROOT_FINAL=%GOROOT%
set DEFGOROOT=-DGOROOT_FINAL="\"%GOROOT_FINAL:\=\\%\""

echo ##### Building C bootstrap tool.
echo cmd/dist
if not exist ..\bin\tool mkdir ..\bin\tool
:: Windows has no glob expansion, so spell out cmd/dist/*.c.
gcc -O2 -Wall -Werror -o cmd/dist/dist.exe -Icmd/dist %DEFGOROOT% cmd/dist/buf.c cmd/dist/build.c cmd/dist/buildgc.c cmd/dist/buildgo.c cmd/dist/buildruntime.c cmd/dist/main.c cmd/dist/windows.c cmd/dist/arm.c
if errorlevel 1 goto fail
.\cmd\dist\dist env -wp >env.bat
if errorlevel 1 goto fail
call env.bat
del env.bat
echo.

if x%1==x--dist-tool goto copydist
if x%2==x--dist-tool goto copydist

echo ##### Building compilers and Go bootstrap tool.
set buildall=-a
if x%1==x--no-clean set buildall=
.\cmd\dist\dist bootstrap %buildall% -v
if errorlevel 1 goto fail
:: Delay move of dist tool to now, because bootstrap cleared tool directory.
move .\cmd\dist\dist.exe "%GOTOOLDIR%\dist.exe"
"%GOTOOLDIR%\go_bootstrap" clean -i std
echo.

if not %GOHOSTARCH% == %GOARCH% goto localbuild
if not %GOHOSTOS% == %GOOS% goto localbuild
goto mainbuild

:localbuild
echo ##### Building tools for local system. %GOHOSTOS%/%GOHOSTARCH%
setlocal
set GOOS=%GOHOSTOS%
set GOARCH=%GOHOSTARCH%
"%GOTOOLDIR%\go_bootstrap" install -gcflags "%GO_GCFLAGS%" -ldflags "%GO_LDFLAGS%" -v std
endlocal
if errorlevel 1 goto fail
echo.

:mainbuild
echo ##### Building packages and commands.
"%GOTOOLDIR%\go_bootstrap" install -gcflags "%GO_GCFLAGS%" -ldflags "%GO_LDFLAGS%" -a -v std
if errorlevel 1 goto fail
del "%GOTOOLDIR%\go_bootstrap.exe"
echo.

if x%1==x--no-banner goto nobanner
"%GOTOOLDIR%\dist" banner
:nobanner

goto end

:copydist
mkdir "%GOTOOLDIR%" 2>NUL
copy cmd\dist\dist.exe "%GOTOOLDIR%\"
goto end

:fail
set GOBUILDFAIL=1
if x%GOBUILDEXIT%==x1 exit %GOBUILDFAIL%

:end