# Contributor: Sören Tempel <soeren+alpine@soeren-tempel.net>
# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
pkgname=go
pkgver=1.10
# This should be the latest commit on the corresponding release branch
# https://github.com/golang/tools/commits/release-branch.go1.10
_toolsver="25101aadb97aa42907eee6a238d6d26a6cb3c756"
pkgrel=1
pkgdesc="Go programming language compiler"
url="http://www.golang.org/"
arch="all"
license="BSD"
depends="binutils gcc"
depends_dev=""
makedepends="bash go-bootstrap"
options="!strip"
provides="go-bootstrap=$pkgver-r$pkgrel"
install=""
subpackages="$pkgname-doc"
source="http://golang.org/dl/go${pkgver/_/}.src.tar.gz
	go-tools-${pkgver/_/}-$_toolsver.tar.gz::https://github.com/golang/tools/archive/${_toolsver}.tar.gz
	default-buildmode-pie.patch
	set-external-linker.patch
	"

# secfixes:
#   1.9.4-r0:
#     - CVE-2018-6574

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

if [ "$CBUILD" = "$CTARGET" ]; then
	makedepends="go-bootstrap $makedepends"
	provides="go-bootstrap=$pkgver-r$pkgrel"
	subpackages="$subpackages $pkgname-tools"
	_gotools="cover godoc stringer"
else
	pkgname="go-bootstrap"
	makedepends="go $makedepends"
	# Go expect host linker instead of the cross-compiler
	export CC_FOR_TARGET="$CC"
	export CC="${HOSTLD:-gcc}"
	export CXX="${HOSTLD:-g++}"
	export LD="${HOSTLD:-ld}"
fi

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

case "$CTARGET_ARCH" in
aarch64)export GOARCH="arm64" ;;
armhf)  export GOARCH="arm" GOARM=6 ;;
armv7)  export GOARCH="arm" GOARM=7 ;;
s390x)  export GOARCH="s390x" ;;
x86)    export GOARCH="386" GO386=387 ;;
x86_64) export GOARCH="amd64" ;;
ppc64le) export GOARCH="ppc64le" ;;
mips)   export GOARCH="mips" ;;
mips64) export GOARCH="mips64" ;;
mips64el) export GOARCH="mips64le" ;;
mipsel) export GOARCH="mipsle" ;;
*)      die "Unsupported arch" ;;
esac

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

	export GOOS="linux"
	export GOPATH="$srcdir"
	export GOROOT="$builddir"
	export GOBIN="$GOROOT"/bin
	export GOROOT_FINAL=/usr/lib/go
	local p; for p in /usr/lib/go-bootstrap /usr/lib/go-linux-$GOARCH-bootstrap /usr/lib/go; do
		if [ -d "$p" ]; then
			export GOROOT_BOOTSTRAP="$p"
			break
		fi
	done

	./make.bash

	# copied from bootstrap.bash to fixup cross-built bootstrap go
	if [ "$CBUILD" != "$CTARGET" ]; then
		local gohostos="$(../bin/go env GOHOSTOS)"
		local gohostarch="$(../bin/go env GOHOSTARCH)"
		mv ../bin/*_*/* ../bin
		rmdir ../bin/*_*
		rm -rf "../pkg/${gohostos}_${gohostarch}"* "../pkg/tool/${gohostos}_${gohostarch}"*
		rm -rf ../pkg/bootstrap ../pkg/obj
	fi

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

	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
	done
}

check() {
	cd "$builddir"
	./bin/go run doc/play/hello.go
}

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

	for binary in go gofmt; do
		install -Dm755 bin/"$binary" "$pkgdir"/usr/lib/go/bin/"$binary"
		ln -s /usr/lib/go/bin/"$binary" "$pkgdir"/usr/bin/
	done

	cp -a pkg lib "$pkgdir"/usr/lib/go
	cp -r doc misc "$pkgdir"/usr/share/doc/go
	rm -rf "$pkgdir"/usr/lib/go/pkg/bootstrap
	rm -f  "$pkgdir"/usr/lib/go/pkg/tool/*/api

	# 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.
	mkdir -p "$pkgdir"/usr/lib/go/
	cp -a "$builddir"/src "$pkgdir"/usr/lib/go

	# 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 \{\} \+
	find "$pkgdir"/usr/lib/go/src \( -type d -a -name "testdata" \) \
		-exec rm -rf \{\} \+
	find "$pkgdir"/usr/lib/go/src -type f -a \( -name "*.bash" -o -name "*.rc" -o -name "*.bat" \) \
		-exec rm -rf \{\} \+
}

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

	mkdir -p "$subpkgdir"/usr/bin "$subpkgdir"/usr/lib/go/bin \
		"$subpkgdir"/usr/lib/go/pkg/tool/linux_$GOARCH

	for tool in $_gotools; do
		if [ -f "$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
		fi
		if [ -f "$builddir/bin/$tool" ]; then
			install -Dm755 "$builddir/bin/$tool" "$subpkgdir"/usr/lib/go/bin/"$tool"
			ln -s /usr/lib/go/bin/"$tool" "$subpkgdir"/usr/bin/
		fi
	done
}

sha512sums="59f089e1ffb2d3aba5ada329d4f0d1181c3c4f01fa64f19d0b753f8a989cb59cf290ad88d215cadc18ef99aba8518e44c9bc258c07eaffc834c55e4a37bd4651  go1.10.src.tar.gz
bb44f4941cc49f8271c1fd46d94c6c165796d919f156a4fd608158247f3f31c4d170e0d5ae67766ee22cb0eb844a106c7fe101fb7d20a2b6414e43e68ffbd6b1  go-tools-1.10-25101aadb97aa42907eee6a238d6d26a6cb3c756.tar.gz
a8f3afd97992f03ccf2680cde214eefccac47daeb9eeb689b5e0b206ea3c19cfb23d448a4eb532894d830d4b91cd97b249e88f04c17feba02d9e243b40243bd0  default-buildmode-pie.patch
6abfdd8521b61ce1e823465f9b950a75dc235d7d58cc4c641c4e7830f7da28b8c57be53aef85641ff79bc95d7bd47bb0796659309d9d8e7907e29df520b150b0  set-external-linker.patch"