go: include godoc, vet and cover

godoc, vet and cover are part of the official Go distribution, but live
in repositories separate from Go itself.

srcpkgs/go/template

@@ -1,10 +1,10 @@
 # Template file for 'go'
 pkgname=go
 version=1.3
-revision=1
+revision=2
 wrksrc=go
-makedepends="ed bison"
-depends="perl gawk"
+hostmakedepends="mercurial ca-certificates"
+depends="perl"
 short_desc="The Go Programming Language"
 maintainer="Juan RP <xtraeme@gmail.com>"
 homepage="http://golang.org/"
@@ -23,13 +23,22 @@ do_build() {
 		i686*) export GOHOSTARCH=386;;
 		x86_64*) export GOHOSTARCH=amd64;;
 	esac
+	case "$XBPS_TARGET_MACHINE" in
+		arm*) targetarch=arm;;
+		i686*) targetarch=386;;
+		x86_64*) targetarch=amd64;;
+		*) targetarch=$GOHOSTARCH;;
+	esac
 	case "$XBPS_TARGET_MACHINE" in
 		armv6l*) export GOARM=6;;
 		armv7l*) export GOARM=7;;
 	esac
 
+	export GOROOT=$PWD
 	export GOROOT_FINAL="/usr/lib/go"
 	export GOOS=linux
+	export GOPATH=/tmp
+	mkdir -p $GOPATH/src
 
 	cd src
 
@@ -41,10 +50,30 @@ do_build() {
 		export GOARCH=$arch
 		bash make.bash --no-clean
 	done
+
+	GOARCH=$targetarch
+
+	hg clone -u release-branch.go${version} \
+		--config web.cacerts=/etc/ssl/certs/ca-certificates.crt \
+		https://code.google.com/p/go.tools/ \
+		$GOPATH/src/code.google.com/p/go.tools
+
+	for tool in godoc vet cover; do
+		$GOROOT/bin/go install code.google.com/p/go.tools/cmd/${tool}
+	done
 }
 
 do_install() {
 	vinstall LICENSE 644 usr/share/licenses/go
+
+	# TODO Beginning with Go 1.4, there will be no editor or shell
+	# integration in the Go distribution anymore (see
+	# https://codereview.appspot.com/105470043) - While the emacs
+	# integration has a canonical upstream at
+	# https://github.com/dominikh/go-mode.el, neither vim, bash nor
+	# zsh have one (yet). In any case, there'll need to be made a
+	# decision between pulling 3rd party integration into this
+	# package, providing extra packages, or doing nothing at all.
 	vinstall misc/bash/go 644 usr/share/bash-completion/completions
 	vinstall misc/emacs/go-mode-load.el 644 usr/share/emacs/site-lisp
 	vinstall misc/emacs/go-mode.el 644 usr/share/emacs/site-lisp