# Contributor: Sören Tempel <soeren+alpine@soeren-tempel.net>
# Maintainer: Eivind Uggedal <eivind@uggedal.com>
pkgname=go
pkgver=1.6.2
# This should be the latest commit on the corresponding release branch
_toolsver="c887be1b2ebd11663d4bf2fbca508c449172339e"
pkgrel=5
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 vet 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="d1b50fa98d9a71eeee829051411e6207  go1.6.2.src.tar.gz
733a96b59562ed84ff552542f16a3ab3  go-tools-1.6.2.tar.gz
1e3ad4f657ac6c22a92e8fc907893e4f  default-buildmode-pie.patch"
sha256sums="787b0b750d037016a30c6ed05a8a70a91b2e9db4bd9b1a2453aa502a63f1bccc  go1.6.2.src.tar.gz
955e5a119babad356d9cf00cdaaf3c27648d4451109b467c872fad8cc94d5b56  go-tools-1.6.2.tar.gz
f3e5a8e0c1c05c34f489ccbfb65291ab2265fa0ef04b8b501e5c98b17547c4b9  default-buildmode-pie.patch"
sha512sums="e148022f9e18b5d5b05744f1aa9fa3ef82e255752179545711ade077e271216aa5b450859a764fdfb028ae4faa26adad8d0a0a5268b31396ab9d14de3cb2f20a  go1.6.2.src.tar.gz
955def7cc3e5ceb5d8e47477400007d32c25f3bc2764f04a0451bd0235af507e63a0966d201a345f51ac764471da8620b5357d1099ec39e2422bd04d25fd71b8  go-tools-1.6.2.tar.gz
13cd386c38875b951da4057586007f3c67503dc79ddf57befbf763af85ec2cd2a2e6b00614450c179c93f1f8747ee7456ee412adccd08a5f115b33812598a148  default-buildmode-pie.patch"