dev-lang/go: revbump to 1.6-r2 to use our provided bootstrap tarballs

dev-lang/go/go-1.6-r2.ebuild

@@ -0,0 +1,237 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+export CBUILD=${CBUILD:-${CHOST}}
+export CTARGET=${CTARGET:-${CHOST}}
+
+MY_PV=${PV/_/}
+
+inherit toolchain-funcs
+
+BOOTSTRAP_DIST="https://dev.gentoo.org/~williamh/dist"
+SRC_URI="
+kernel_Darwin? (
+	x64-macos? ( ${BOOTSTRAP_DIST}/go-darwin-amd64-bootstrap.tbz )
+)
+kernel_FreeBSD? (
+amd64-fbsd? ( ${BOOTSTRAP_DIST}/go-freebsd-amd64-bootstrap.tbz )
+x86-fbsd? ( ${BOOTSTRAP_DIST}/go-freebsd-386-bootstrap.tbz )
+)
+kernel_linux? (
+	amd64? ( ${BOOTSTRAP_DIST}/go-linux-amd64-bootstrap.tbz )
+	arm? ( ${BOOTSTRAP_DIST}/go-linux-arm-bootstrap.tbz )
+	arm64? ( ${BOOTSTRAP_DIST}/go-linux-arm64-bootstrap.tbz )
+	ppc64? ( ${BOOTSTRAP_DIST}/go-linux-ppc64-bootstrap.tbz )
+	x86? ( ${BOOTSTRAP_DIST}/go-linux-386-bootstrap.tbz )
+)
+"
+
+if [[ ${PV} = 9999 ]]; then
+	EGIT_REPO_URI="git://github.com/golang/go.git"
+	inherit git-r3
+else
+	SRC_URI+="https://storage.googleapis.com/golang/go${MY_PV}.src.tar.gz"
+	# go-bootstrap-1.4 only supports go on amd64, arm and x86 architectures.
+	# Allowing other bootstrap options would enable arm64 and ppc64 builds.
+	case ${PV} in
+		*9999*|*_rc*) ;;
+		*)
+			KEYWORDS="-* ~amd64"
+			;;
+	esac
+fi
+
+DESCRIPTION="A concurrent garbage collected and typesafe programming language"
+HOMEPAGE="http://www.golang.org"
+
+LICENSE="BSD"
+SLOT="0/${PV}"
+IUSE=""
+
+DEPEND=""
+RDEPEND="!<dev-go/go-tools-0_pre20150902"
+
+# These test data objects have writable/executable stacks.
+QA_EXECSTACK="usr/lib/go/src/debug/elf/testdata/*.obj"
+
+REQUIRES_EXCLUDE="/usr/lib/go/src/debug/elf/testdata/*"
+
+# The tools in /usr/lib/go should not cause the multilib-strict check to fail.
+QA_MULTILIB_PATHS="usr/lib/go/pkg/tool/.*/.*"
+
+# The go language uses *.a files which are _NOT_ libraries and should not be
+# stripped. The test data objects should also be left alone and unstripped.
+STRIP_MASK="/usr/lib/go/pkg/*.a
+	/usr/lib/go/src/debug/elf/testdata/*
+	/usr/lib/go/src/debug/dwarf/testdata/*
+	/usr/lib/go/src/runtime/race/*.syso"
+
+if [[ ${PV} != 9999 ]]; then
+	S="${WORKDIR}"/go
+fi
+
+go_arch()
+{
+	# By chance most portage arch names match Go
+	local portage_arch=$(tc-arch $@)
+	case "${portage_arch}" in
+		x86)	echo 386;;
+		x64-*)	echo amd64;;
+		*)		echo "${portage_arch}";;
+	esac
+}
+
+go_arm()
+{
+	case "${1:-${CHOST}}" in
+		armv5*)	echo 5;;
+		armv6*)	echo 6;;
+		armv7*)	echo 7;;
+		*)
+			die "unknown GOARM for ${1:-${CHOST}}"
+			;;
+	esac
+}
+
+go_os()
+{
+	case "${1:-${CHOST}}" in
+		*-linux*)	echo linux;;
+		*-darwin*)	echo darwin;;
+		*-freebsd*)	echo freebsd;;
+		*-netbsd*)	echo netbsd;;
+		*-openbsd*)	echo openbsd;;
+		*-solaris*)	echo solaris;;
+		*-cygwin*|*-interix*|*-winnt*)
+			echo windows
+			;;
+		*)
+			die "unknown GOOS for ${1:-${CHOST}}"
+			;;
+	esac
+}
+
+go_tuple()
+{
+	echo "$(go_os $@)_$(go_arch $@)"
+}
+
+go_cross_compile()
+{
+	[[ $(go_tuple ${CBUILD}) != $(go_tuple) ]]
+}
+
+pkg_pretend()
+{
+	# make.bash does not understand cross-compiling a cross-compiler
+	if [[ $(go_tuple) != $(go_tuple ${CTARGET}) ]]; then
+		die "CHOST CTARGET pair unsupported: CHOST=${CHOST} CTARGET=${CTARGET}"
+	fi
+}
+
+src_unpack()
+{
+	if [[ ${PV} = 9999 ]]; then
+		git-r3_src_unpack
+	fi
+	default
+}
+
+src_compile()
+{
+	export GOROOT_BOOTSTRAP="${WORKDIR}"/go-$(go_os)-$(go_arch)-bootstrap
+	export GOROOT_FINAL="${EPREFIX}"/usr/lib/go
+	export GOROOT="$(pwd)"
+	export GOBIN="${GOROOT}/bin"
+
+	# Go's build script does not use BUILD/HOST/TARGET consistently. :(
+	export GOHOSTARCH=$(go_arch ${CBUILD})
+	export GOHOSTOS=$(go_os ${CBUILD})
+	export CC=$(tc-getBUILD_CC)
+
+	export GOARCH=$(go_arch)
+	export GOOS=$(go_os)
+	export CC_FOR_TARGET=$(tc-getCC)
+	export CXX_FOR_TARGET=$(tc-getCXX)
+	if [[ ${ARCH} == arm ]]; then
+		export GOARM=$(go_arm)
+	fi
+
+	cd src
+	./make.bash || die "build failed"
+}
+
+src_test()
+{
+	go_cross_compile && return 0
+
+	cd src
+	PATH="${GOBIN}:${PATH}" \
+		./run.bash -no-rebuild || die "tests failed"
+}
+
+src_install()
+{
+	local bin_path f x
+
+	dodir /usr/lib/go
+	insinto /usr/lib/go
+
+	# There is a known issue which requires the source tree to be installed [1].
+	# Once this is fixed, we can consider using the doc use flag to control
+	# installing the doc and src directories.
+	# [1] https://golang.org/issue/2775
+	doins -r bin doc lib pkg src
+	fperms -R +x /usr/lib/go/bin /usr/lib/go/pkg/tool
+
+	cp -a misc "${D}"/usr/lib/go/misc
+
+	if go_cross_compile; then
+		bin_path="bin/$(go_tuple)"
+	else
+		bin_path=bin
+	fi
+	for x in ${bin_path}/*; do
+		f=${x##*/}
+		dosym ../lib/go/${bin_path}/${f} /usr/bin/${f}
+	done
+	dodoc AUTHORS CONTRIBUTORS PATENTS README.md
+}
+
+pkg_preinst()
+{
+	has_version '<dev-lang/go-1.4' &&
+		export had_support_files=true ||
+		export had_support_files=false
+}
+
+pkg_postinst()
+{
+	# If the go tool sees a package file timestamped older than a dependancy it
+	# will rebuild that file.  So, in order to stop go from rebuilding lots of
+	# packages for every build we need to fix the timestamps.  The compiler and
+	# linker are also checked - so we need to fix them too.
+	ebegin "fixing timestamps to avoid unnecessary rebuilds"
+	tref="usr/lib/go/pkg/*/runtime.a"
+	find "${EROOT}"usr/lib/go -type f \
+		-exec touch -r "${EROOT}"${tref} {} \;
+	eend $?
+
+	if [[ ${PV} != 9999 && -n ${REPLACING_VERSIONS} &&
+		${REPLACING_VERSIONS} != ${PV} ]]; then
+		elog "Release notes are located at http://golang.org/doc/go${PV}"
+	fi
+
+	if $had_support_files; then
+		ewarn
+		ewarn "All editor support, IDE support, shell completion"
+		ewarn "support, etc has been removed from the go package"
+		ewarn "upstream."
+		ewarn "For more information on which support is available, see"
+		ewarn "the following URL:"
+		ewarn "https://github.com/golang/go/wiki/IDEsAndTextEditorPlugins"
+	fi
+}