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# Contributor: Sören Tempel <soeren+alpine@soeren-tempel.net>
# Maintainer: Eivind Uggedal <eivind@uggedal.com>
pkgname=go
pkgver=1.7.1
# This should be the latest commit on the corresponding release branch
_toolsver="26c35b4dcf6dfcb924e26828ed9f4d028c5ce05a"
pkgrel=0
pkgdesc="Go programming language compiler"
url="http://www.golang.org/"
arch="all"
license="BSD"
depends="binutils gcc"
depends_dev=""
makedepends="bash"
options="!strip"
install=""
subpackages="$pkgname-doc $pkgname-tools $pkgname-cross"
source="http://golang.org/dl/go${pkgver/_/}.src.tar.gz
	$pkgname-tools-${pkgver/_/}.tar.gz::https://github.com/golang/tools/archive/${_toolsver}.tar.gz
	default-buildmode-pie.patch
	http://dev.alpinelinux.org/bootstrap/go/go-linux-musl-arm64-bootstrap.tar.bz2
	"

# NOTE: building go for x86 with grsec kernel requires:
#           sysctl -w kernel.modify_ldt=1

# use go-bootstrap for archs that are supported
case "$CARCH" in
aarch64)
	_goroot_bootstrap="$srcdir"/go-linux-arm64-bootstrap
	;;
*)
	makedepends="$makedepends go-bootstrap"
	_goroot_bootstrap=/usr/lib/go-bootstrap
	;;
esac

_gotools="cover godoc stringer"
_gocross="darwin freebsd openbsd windows"
_tooldir="$srcdir"/tools-${_toolsver}

builddir="$srcdir"/$pkgname
build() {
	cd "$builddir/src"

	export GOPATH="$srcdir"
	export GOROOT="$builddir"
	export GOBIN="$GOROOT"/bin
	export GOROOT_FINAL=/usr/lib/go
	export GOROOT_BOOTSTRAP="$_goroot_bootstrap"

	case "$CARCH" in
	aarch64)export GOARCH="arm64" ;;
	armhf)	export GOARCH="arm" GOARM=6 ;;
	armv7)	export GOARCH="arm" GOARM=7 ;;
	x86)	export GOARCH="386" ;;
	x86_64)	export GOARCH="amd64" ;;
	*)	return 1 ;;
	esac

	./make.bash --no-clean || return 1
	for os in $_gocross; do
		for arch in "386" "amd64"; do
			GOARCH=$arch GOOS=$os ./make.bash --no-clean || return 1
		done
	done

	# FIXME some tests fail:
	# PATH="$GOROOT/bin:$PATH" ./run.bash -no-rebuild || return 1

	mkdir -p "$GOPATH"/src/golang.org/x/tools
	cp -r "$_tooldir"/* "$GOPATH"/src/golang.org/x/tools

	for tool in $_gotools; do
		"$GOROOT"/bin/go install \
			golang.org/x/tools/cmd/$tool || return 1
	done
}

package() {
	cd "$builddir"
	mkdir -p "$pkgdir"/usr/bin "$pkgdir"/usr/lib/go/bin "$pkgdir"/usr/share/doc/go

	for binary in go gofmt; do
		mv bin/"$binary" "$pkgdir"/usr/lib/go/bin/ || return 1
		ln -s /usr/lib/go/bin/"$binary" "$pkgdir"/usr/bin/ || return 1
	done

	# The source needs to be installed due to an upstream
	# bug (https://github.com/golang/go/issues/2775).
	# When this is resolved we can split out the source to a
	# go-src sub package.
	cp -a pkg src lib "$pkgdir"/usr/lib/go || return 1
	cp -r doc misc "$pkgdir"/usr/share/doc/go || return 1

	# Remove tests from /usr/lib/go/src.
	# Those shouldn't be affacted by the upstream bug (see above).
	find "$pkgdir"/usr/lib/go/src \( -type f -a -name "*_test.go" \) \
		-exec rm -rf \{\} \+ || return 1
	find "$pkgdir"/usr/lib/go/src \( -type d -a -name "testdata" \) \
		-exec rm -rf \{\} \+ || return 1
	find "$pkgdir"/usr/lib/go/src -type f -a \( -name "*.bash" -o -name "*.rc" -o -name "*.bat" \) \
		-exec rm -rf \{\} \+ || return 1

	rm -rf "$pkgdir"/usr/lib/go/pkg/bootstrap
	rm -f  "$pkgdir"/usr/lib/go/pkg/tool/*/api
}

tools() {
	pkgdesc="Go programming language tools"
	depends="$pkgname"

	mkdir -p "$subpkgdir"/usr/bin "$subpkgdir"/usr/lib/go/bin
	for binary in "$builddir"/bin/*; do
		mv $binary "$subpkgdir"/usr/lib/go/bin || return 1
		ln -s /usr/lib/go/bin/"${binary##*/}" "$subpkgdir"/usr/bin/ || return 1
	done

	mkdir -p "$subpkgdir"/usr/lib/go/pkg/tool/linux_$GOARCH
	cp "$subpkgdir"/usr/lib/go/bin/godoc \
		"$pkgdir"/usr/lib/go/pkg/tool/linux_$GOARCH/godoc || return 1

	for tool in $_gotools; do
		[ -f "$pkgdir"/usr/lib/go/pkg/tool/linux_$GOARCH/$tool ] \
			|| continue

		mv "$pkgdir"/usr/lib/go/pkg/tool/linux_$GOARCH/$tool \
			"$subpkgdir"/usr/lib/go/pkg/tool/linux_$GOARCH/$tool || return 1
	done
}

cross() {
	pkgdesk="Go cross compilers"
	depends="$pkgname"

	mkdir -p "$subpkgdir"/usr/lib/go/pkg/tool
	for os in $_gocross; do
		mv "$pkgdir"/usr/lib/go/pkg/tool/${os}_* \
			"$subpkgdir"/usr/lib/go/pkg/tool || return 1
		mv "$pkgdir"/usr/lib/go/pkg/${os}_* \
			"$subpkgdir"/usr/lib/go/pkg || return 1
	done
}

md5sums="433e2158e5c28fe24b11622df393cc46  go1.7.1.src.tar.gz
9e14a20ca24062e0855293bc8d38c00b  go-tools-1.7.1.tar.gz
1e3ad4f657ac6c22a92e8fc907893e4f  default-buildmode-pie.patch
3bda1b07117ed599a991877465eaffdd  go-linux-musl-arm64-bootstrap.tar.bz2"
sha256sums="2b843f133b81b7995f26d0cb64bbdbb9d0704b90c44df45f844d28881ad442d3  go1.7.1.src.tar.gz
b796a67a568ca0df5a5a9a1870703db281b17907f812b9cf6ff42568f6764275  go-tools-1.7.1.tar.gz
f3e5a8e0c1c05c34f489ccbfb65291ab2265fa0ef04b8b501e5c98b17547c4b9  default-buildmode-pie.patch
a1d870570317f5e87c606d6bad0d435a594fed802c99475ab306768dc853a029  go-linux-musl-arm64-bootstrap.tar.bz2"
sha512sums="eab2b44f44d05c62645756e05078c2a8b7e3c4d2413617a20a6659df22e4612bb2059cf4906ab81134421eb371903034c1b197bb5595c9af9901819b2b3330a3  go1.7.1.src.tar.gz
553be713d03f1a53605c41f67822c75d86dacf9ccba9f2329e111b4178287aee1ddccd3ccc4ab76b9dbcff34f11aeddebce5deac47e715ea75d032bc9ab0355c  go-tools-1.7.1.tar.gz
13cd386c38875b951da4057586007f3c67503dc79ddf57befbf763af85ec2cd2a2e6b00614450c179c93f1f8747ee7456ee412adccd08a5f115b33812598a148  default-buildmode-pie.patch
da2a33c7bafe11bdad12e755bfe19c9f8ab34ae14899712a0e10da202d5457af419a920be5ffa19cc03d2351194b5c02f1edb595201f81dfb8a51f34b42a8162  go-linux-musl-arm64-bootstrap.tar.bz2"