# Contributor: Sören Tempel <soeren+alpine@soeren-tempel.net>
# Contributor: Eivind Uggedal <eu@eju.no>
# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
pkgname=go
# go binaries are statically linked, security updates require rebuilds
pkgver=1.13.4
pkgrel=1
pkgdesc="Go programming language compiler"
url="https://golang.org/"
arch="all"
license="BSD-3-Clause"
depends="binutils gcc musl-dev"
makedepends="bash"
checkdepends="binutils-gold"
subpackages="$pkgname-doc"
source="https://golang.org/dl/go${pkgver/_/}.src.tar.gz
	default-buildmode-pie.patch
	set-external-linker.patch
	disable-flaky-sync-test.patch
	"

case "$CARCH" in
	arm*|aarch64) depends="binutils-gold";;
	x86) options="!check" ;; # FIXME
esac

# secfixes:
#   1.13.2-r0:
#   - CVE-2019-17596
#   1.13.1-r0:
#   - CVE-2019-16276
#   1.12.8-r0:
#   - CVE-2019-9512
#   - CVE-2019-9514
#   - CVE-2019-14809
#   1.11.5-r0:
#   - CVE-2019-6486
#   1.9.4-r0:
#   - CVE-2018-6574

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

# The following tests fail currently, most of them fail due to linking
# errors likely related to 'default-buildmode-pie.patch' or musl libc.
_brokentests="runtime debug/gosym cmd/.* cgo.* go_test:os/exec ^test.*"

if [ "$CBUILD" = "$CTARGET" ]; then
	makedepends="go-bootstrap $makedepends"
	provides="go-bootstrap=$pkgver-r$pkgrel"
	subpackages="$subpackages"
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

case "$CTARGET_ARCH" in
aarch64)export GOARCH="arm64" ;;
armel)  export GOARCH="arm" GOARM=5 ;;
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" GOMIPS=softfloat ;;
mips64) export GOARCH="mips64" GOMIPS64=softfloat ;;
mips64el) export GOARCH="mips64le" GOMIPS64=softfloat ;;
mipsel) export GOARCH="mipsle" GOMIPS=softfloat ;;
*)      export GOARCH="unsupported";;
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
}

check() {
	cd "$builddir/src"
	PATH="$builddir/bin:$PATH" ./run.bash -no-rebuild \
		-run "!($(echo "$_brokentests" | tr " " "|"))$"
}

package() {
	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 "$pkgdir"/usr/lib/go/pkg/obj
	rm -rf "$pkgdir"/usr/lib/go/pkg/bootstrap
	rm -f  "$pkgdir"/usr/lib/go/pkg/tool/*/api

	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 \{\} \+
}

sha512sums="e8155cdceca2ebefd386feef98223bbdc92d9316f7188d4ba701cf43a723b75a9bf67a1eb92ac80987b7a113a2fb6981ef235292bec7dd3964805b7c33abdbb1  go1.13.4.src.tar.gz
f0c07d9979fc3165fc78158406de8440624b3f2c6f6542c9889c71efbf3d2f02a7ffee27ccba8c2630489895d331b7b9d3a606162134dcb3e8e0b9fc06b529dc  default-buildmode-pie.patch
faf8de430df185842902322f064254f3e9ecee0884b3075b5550c85da15ff61ea6c2bb8d0fb7cf3887abc0e40974bd73ee8f8c14da7f914dde7e9220177c4e2a  set-external-linker.patch
6ce14ca43fd35520e667530af91cfcad8902d635e6dd8c04d19428299b9e29ba049120f5eebbb00717a895f052d1cc40d3f522c090786625cce726715a8218ec  disable-flaky-sync-test.patch"