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# Contributor: Sören Tempel <soeren+alpine@soeren-tempel.net>
# Maintainer: Eivind Uggedal <eivind@uggedal.com>
pkgname=go
pkgver=1.6.1
# This should be the latest commit on the corresponding release branch
_toolsver="c887be1b2ebd11663d4bf2fbca508c449172339e"
pkgrel=0
pkgdesc="Go programming language compiler"
url="http://www.golang.org/"
arch="all"
license="BSD"
depends=""
depends_dev=""
makedepends="bash go-bootstrap"
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
	no-pic.patch
	fix-musl.patch"

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

_gotools="cover vet godoc"
_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

	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 "$pkgdir"/usr/lib/go || return 1
	cp -r doc misc "$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 $_gotools; do
		mv "$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="29e1b0369825a56d79f6bd4eb29b0864  go1.6.1.src.tar.gz
733a96b59562ed84ff552542f16a3ab3  go-tools-1.6.1.tar.gz
efa8ac40fa8429f7cd6f23eca05a0a0f  no-pic.patch
b7b8ea485b39a99e7959d27cbd57a32b  fix-musl.patch"
sha256sums="1d4b53cdee51b2298afcf50926a7fa44b286f0bf24ff8323ce690a66daa7193f  go1.6.1.src.tar.gz
955e5a119babad356d9cf00cdaaf3c27648d4451109b467c872fad8cc94d5b56  go-tools-1.6.1.tar.gz
1eb60ded9035e9692e4c17b2bb6e9c073e21261eaafa56ee0528d5d2c43a936d  no-pic.patch
d9cb3c128f198d2aabfa96a117e2238a1ac0aaec3e50b9c6b7cf63ab8850f5a4  fix-musl.patch"
sha512sums="31ea2504f8ab0fd709005275d0c2129b6cdb4e5d34d6e2b435b23480674b135d1bff8de863b1e01201e757523f4dc28b6ebefeb87d7e855f2509a6837e436fab  go1.6.1.src.tar.gz
955def7cc3e5ceb5d8e47477400007d32c25f3bc2764f04a0451bd0235af507e63a0966d201a345f51ac764471da8620b5357d1099ec39e2422bd04d25fd71b8  go-tools-1.6.1.tar.gz
51e4c3ee0cda98090db5d00468072bcbf5f0a1a429dd8dedddccaa1467b285f724b012be96d329566b195470bea0aaf4b464e8ba6d2029b0dd42678a7a14b663  no-pic.patch
5132a833f34ca8a0ebc7ee9eb66d75a6e0c45adf19980996bdb18b9c886077ef752e2b27d2bb23397245b9a225baf8c45f265a8f4521e136e69eb5d85d070e31  fix-musl.patch"