# Contributor: Sören Tempel <soeren+alpine@soeren-tempel.net>
# Maintainer: Eivind Uggedal <eivind@uggedal.com>
pkgname=go
pkgver=1.7_rc1
# This should be the latest commit on the corresponding release branch
_toolsver="527b253f588776e5f72a0a0d1e93195cd3f82707"
pkgrel=0
pkgdesc="Go programming language compiler"
url="http://www.golang.org/"
arch="all"
license="BSD"
depends=""
depends_dev=""
makedepends="bash go-bootstrap paxmark"
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
	"

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

_gotools="cover godoc stringer"
_gocross="darwin freebsd openbsd windows"

_builddir="$srcdir"/$pkgname
_tooldir="$srcdir"/tools-${_toolsver}

prepare() {
	local i
	cd "$_builddir"
	for i in $source; do
		case $i in
		*.patch) msg $i; patch -p1 -i "$srcdir"/$i || return 1;;
		esac
	done
}

build() {
	cd "$_builddir/src"

	export GOPATH="$srcdir"
	export GOROOT="$_builddir"
	export GOBIN="$GOROOT"/bin
	export GOROOT_FINAL=/usr/lib/go
	export GOROOT_BOOTSTRAP=/usr/lib/go-bootstrap

	case "$CARCH" in
	x86)	export GOARCH="386" ;;
	x86_64)	export GOARCH="amd64" ;;
	arm*)	export GOARCH="arm" ;;
	*)	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

	# go before 1.7 has issues with randmmap on arm
	# https://github.com/golang/go/issues/16081
	if [ "$GOARCH" = "arm" ]; then
		paxmark -r bin/go || attr -s pax.flags -V "rx" bin/go \
			|| return 1
	fi

	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-doc 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 \( -type f -a -name "*.bash" \) \
		-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 $_gotools; do
    if test -f "$pkgdir"/usr/lib/go/pkg/tool/linux_$GOARCH/$tool
    then
  		mv "$pkgdir"/usr/lib/go/pkg/tool/linux_$GOARCH/$tool \
	  		"$subpkgdir"/usr/lib/go/pkg/tool/linux_$GOARCH/$tool || return 1
    fi
	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="9235e0a992216ae400eb1a3bd350259f  go1.7rc1.src.tar.gz
24099025de8422aa8b50341ea71bad0e  go-tools-1.7rc1.tar.gz
1e3ad4f657ac6c22a92e8fc907893e4f  default-buildmode-pie.patch"
sha256sums="f26b42ea8d3de92efda5e2f7172b22d59e19676f23bbcf64412b32b4f4a5ff58  go1.7rc1.src.tar.gz
89819a5a457d1771bc5960079ed6f0e2870c81aafd3e0b13f0b82fc2427a1220  go-tools-1.7rc1.tar.gz
f3e5a8e0c1c05c34f489ccbfb65291ab2265fa0ef04b8b501e5c98b17547c4b9  default-buildmode-pie.patch"
sha512sums="3c4fee4ebc8ac0e1eeb36b5583263b9c28952ecd93c6dfba6696dec820f41b4f1cb27b9d630d94d066df00c06e11a748542a06ddccbc66a7c9a80e8e2906dd8f  go1.7rc1.src.tar.gz
c298f821033f9db3cd100e38346474c3982417958f347078abfff895834964251269116535e46aa5c2a9e58c421928b874ea98e5c5cd65a83c0b64ae04029d3e  go-tools-1.7rc1.tar.gz
13cd386c38875b951da4057586007f3c67503dc79ddf57befbf763af85ec2cd2a2e6b00614450c179c93f1f8747ee7456ee412adccd08a5f115b33812598a148  default-buildmode-pie.patch"