L12:if errorlevel 1 goto fail
L13:call .\env.bat
L14:del env.bat
L15:echo.
L16:
L17:if exist %GOTOOLDIR%\dist.exe goto distok
L18:echo cannot find %GOTOOLDIR%\dist; nothing to clean
L19:goto fail
L20::distok
L21:
L22:"%GOBIN%\go" clean -i std
L23:"%GOBIN%\go" tool dist clean
L24:"%GOBIN%\go" clean -i cmd
L25:
L26:goto end
L27:
L28::fail
L29:set GOBUILDFAIL=1
L30:
L31::end
L32:if x%GOBUILDEXIT%==x1 exit %GOBUILDFAIL%
...

Vendoring in std and cmd
========================

The Go command maintains copies of external packages needed by the
standard library in the src/vendor and src/cmd/vendor directories.

There are two modules, std and cmd, defined in src/go.mod and
src/cmd/go.mod. When a package outside std or cmd is imported
by a package inside std or cmd, the import path is interpreted
as if it had a "vendor/" prefix. For example, within "crypto/tls",

curl -sS -L -O https://www.iana.org/time-zones/repository/releases/tzdata$DATA.tar.gz
tar xzf tzcode$CODE.tar.gz
tar xzf tzdata$DATA.tar.gz

if ! make CFLAGS=-DSTD_INSPIRED AWK=awk TZDIR=zoneinfo posix_only >make.out 2>&1; then
	cat make.out
	exit 2
fi

cd zoneinfo
../mkzip ../../zoneinfo.zip
cd ../..

files="update.bash zoneinfo.zip"
modified=true

// license that can be found in the LICENSE file.

// This .cc file will be automatically compiled by the go tool and
// included in the package.

#include <string>
#include "main.h"

std::string Caller::call() {
	if (callback_ != 0)
		return callback_->run();
	return "";

   license that can be found in the LICENSE file.  */

/* An example of writing a C++ virtual function in Go.  */

%module(directors="1") callback

%{
#include <string>
#include "main.h"
%}

%include "std_string.i"

%feature("director");

# license that can be found in the LICENSE file.

eval `{go tool dist env -9}

if(! test -x $GOTOOLDIR/dist){
	echo 'cannot find $GOTOOLDIR/dist; nothing to clean' >[1=2]
	exit noclean
}

$GOBIN/go clean -i std
$GOBIN/go tool dist clean

		export GOARCH=arm
		export GOARM=5
	fi

	# Build and vet everything.
	# cmd/go/internal/work/exec.go enables the same vet flags during go test of std cmd
	# and should be kept in sync with any vet flag changes here.
	if ! "$GOROOT/bin/go" build std cmd || ! "$GOROOT/bin/go" vet -unsafeptr=false std cmd; then
		failed=true
		if $sete; then
			exit 1
		fi
	fi
done

if [ "$failed" = "true" ]; then
	echo "" 1>&2

class Callback {
public:
	virtual ~Callback() { }
	virtual std::string run() { return "Callback::run"; }
};

class Caller {
private:
	Callback *callback_;
public:
	Caller(): callback_(0) { }
	~Caller() { delCallback(); }
	void delCallback() { delete callback_; callback_ = 0; }
	void setCallback(Callback *cb) { delCallback(); callback_ = cb; }
	std::string call();

	exit 1
fi
export GOROOT="$(cd .. && pwd)"

gobin="${GOROOT}"/bin
if ! "$gobin"/go help >/dev/null 2>&1; then
	echo 'cannot find go command; nothing to clean' >&2
	exit 1
fi

"$gobin/go" clean -i std
"$gobin/go" tool dist clean