Add vendor script

Signed-off-by: Alexander Morozov <lk4d4@docker.com>

hack/.vendor-helpers.sh

@@ -0,0 +1,109 @@
+#!/usr/bin/env bash
+
+PROJECT=github.com/docker/containerd
+
+# Downloads dependencies into vendor/ directory
+mkdir -p vendor
+
+export GOPATH="$GOPATH:${PWD}/vendor"
+
+find='find'
+if [ "$(go env GOHOSTOS)" = 'windows' ]; then
+	find='/usr/bin/find'
+fi
+
+clone() {
+	local vcs="$1"
+	local pkg="$2"
+	local rev="$3"
+	local url="$4"
+
+	: ${url:=https://$pkg}
+	local target="vendor/src/$pkg"
+
+	echo -n "$pkg @ $rev: "
+
+	if [ -d "$target" ]; then
+		echo -n 'rm old, '
+		rm -rf "$target"
+	fi
+
+	echo -n 'clone, '
+	case "$vcs" in
+		git)
+			git clone --quiet --no-checkout "$url" "$target"
+			( cd "$target" && git checkout --quiet "$rev" && git reset --quiet --hard "$rev" )
+			;;
+		hg)
+			hg clone --quiet --updaterev "$rev" "$url" "$target"
+			;;
+	esac
+
+	echo -n 'rm VCS, '
+	( cd "$target" && rm -rf .{git,hg} )
+
+	echo -n 'rm vendor, '
+	( cd "$target" && rm -rf vendor Godeps/_workspace )
+
+	echo done
+}
+
+clean() {
+	local packages=(
+		"${PROJECT}/containerd" # package main
+		"${PROJECT}/ctr" # package main
+	)
+	local platforms=( linux/amd64 linux/386 windows/amd64 windows/386 darwin/amd64 )
+	local buildTagCombos=(
+		'libcontainer runc seccomp'
+	)
+
+	echo
+
+	echo -n 'collecting import graph, '
+	local IFS=$'\n'
+	local imports=( $(
+		for platform in "${platforms[@]}"; do
+			export GOOS="${platform%/*}";
+			export GOARCH="${platform##*/}";
+			for buildTags in "${buildTagCombos[@]}"; do
+				go list -e -tags "$buildTags" -f '{{join .Deps "\n"}}' "${packages[@]}"
+				go list -e -tags "$buildTags" -f '{{join .TestImports "\n"}}' "${packages[@]}"
+			done
+		done | grep -vE "^${PROJECT}" | sort -u
+	) )
+	imports=( $(go list -e -f '{{if not .Standard}}{{.ImportPath}}{{end}}' "${imports[@]}") )
+	unset IFS
+
+	echo -n 'pruning unused packages, '
+	findArgs=(
+		# This directory contains only .c and .h files which are necessary
+		-path vendor/src/github.com/mattn/go-sqlite3/code
+	)
+	for import in "${imports[@]}"; do
+		[ "${#findArgs[@]}" -eq 0 ] || findArgs+=( -or )
+		findArgs+=( -path "vendor/src/$import" )
+	done
+	local IFS=$'\n'
+	local prune=( $($find vendor -depth -type d -not '(' "${findArgs[@]}" ')') )
+	unset IFS
+	for dir in "${prune[@]}"; do
+		$find "$dir" -maxdepth 1 -not -type d -not -name 'LICENSE*' -not -name 'COPYING*' -exec rm -v -f '{}' ';'
+		rmdir "$dir" 2>/dev/null || true
+	done
+
+	echo -n 'pruning unused files, '
+	$find vendor -type f -name '*_test.go' -exec rm -v '{}' ';'
+
+	echo done
+}
+
+# Fix up hard-coded imports that refer to Godeps paths so they'll work with our vendoring
+fix_rewritten_imports () {
+       local pkg="$1"
+       local remove="${pkg}/Godeps/_workspace/src/"
+       local target="vendor/src/$pkg"
+
+       echo "$pkg: fixing rewritten imports"
+       $find "$target" -name \*.go -exec sed -i -e "s|\"${remove}|\"|g" {} \;
+}

hack/vendor.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -e
+
+rm -rf vendor/
+source 'hack/.vendor-helpers.sh'
+
+clone git github.com/Sirupsen/logrus master
+clone git github.com/cloudfoundry/gosigar master
+clone git github.com/codegangsta/cli master
+clone git github.com/coreos/go-systemd master
+clone git github.com/cyberdelia/go-metrics-graphite master
+clone git github.com/docker/docker master
+clone git github.com/docker/go-units master
+clone git github.com/godbus/dbus master
+clone git github.com/golang/glog master
+clone git github.com/golang/protobuf master
+clone git github.com/opencontainers/runc master
+clone git github.com/opencontainers/specs master
+clone git github.com/rcrowley/go-metrics master
+clone git github.com/satori/go.uuid master
+clone git github.com/syndtr/gocapability master
+clone git github.com/vishvananda/netlink master
+clone git github.com/Azure/go-ansiterm master
+clone git golang.org/x/net master https://github.com/golang/net.git
+clone git google.golang.org/grpc master https://github.com/grpc/grpc-go.git
+clone git github.com/seccomp/libseccomp-golang master
+
+clean