gov provides a way to create vendor experiment setups directly (Requires mac / linux)

gov

#!/bin/bash
GOSRC="$GOPATH/src/"
CURPATH=`pwd`

if [ -z "$GOPATH" ]; then
    echo "Need to set GOPATH"
    exit 1
fi  

if ! [[ $GOPATH == */ ]]; then
	GOPATH=$GOPATH/
fi

if ! [[ $PWD == ${GOPATH}src/* ]]; then
	echo Must be in '$GOPATH/src/<projname>' to use vendoring
	exit 1
fi

if [[ $PWD == *"vendor"* ]]; then
	echo "Cannot do vendoring inside vendor"
	exit 1
fi
declare -a UPDATEDPACKAGES
array_contains () { 
    local array="$1[@]"
    local seeking=$2
    local in=1
    for element in "${!array}"; do
        if [[ $element == $seeking ]]; then
            in=0
            break
        fi
    done
    return $in
}
GOLEN=${#GOSRC}
PACKLEN=${#CURPATH}
MaxLEN=`expr $PACKLEN - $GOLEN`
CURPACKAGE=${CURPATH:GOLEN:MaxLEN}
DEPLIST=`go list -f '{{join .Deps "\n"}}' |  xargs go list -f '{{if not .Standard}}{{.ImportPath}}{{end}}'|grep -v $CURPACKAGE`
for PNAME in $DEPLIST; do
	IFS='/' read -ra i <<< "$PNAME"
	DEPPACKAGE="${i[0]}/${i[1]}/${i[2]}"
	REPODOMAIN=${i[0]}
	OWNERNAME=${i[1]}
	REPONAME=${i[2]}
	if [ -d $GOPATH/src/$DEPPACKAGE ]; then
		if [ "$REPODOMAIN" != "git.nexgen.neustar.biz" ]; then
			if [ ! -d $CURPATH/vendor/$DEPPACKAGE ]; then
				mkdir -p $CURPATH/vendor/$DEPPACKAGE
				echo "The DEP Package to be created is $DEPPACKAGE"
				rsync -a --del --exclude=.git --exclude=vendor $GOPATH/src/$DEPPACKAGE/ $CURPATH/vendor/$DEPPACKAGE/
			fi
		else
			NEEDSUPDATE="yes"
			array_contains UPDATEDPACKAGES "$DEPPACKAGE" && NEEDSUPDATE="yes" || NEEDSUPDATE="no"
			if [ $NEEDSUPDATE == "no" ]; then
				echo "Updating $DEPPACKAGE"
				CHANGES=`git status -s |grep M`
				cd $GOPATH/src/$DEPPACKAGE
				if [ -z CHANGES ]; then
					echo "Changes detected for $DEPPACKAGE, stashing pulling and applying"
					git stash
					git pull
					git stash apply
					UPDATEDPACKAGES+=("$DEPPACKAGE")
					cd $CURPATH
				else
					git pull
					UPDATEDPACKAGES+=("$DEPPACKAGE")
					cd $CURPATH
				fi
			fi
			
			
		fi
		#Package is available so lets see if it exists and if not pull it / sync
		
	else
		if [ "$REPODOMAIN" != "git.nexgen.neustar.biz" ]; then
			go get $DEPPACKAGE
			mkdir -p $CURPATH/vendor/$DEPPACKAGE
			echo "The DEP Package that exists is $DEPPACKAGE... syncing it to vendor"
			rsync -a --del --exclude=.git --exclude=vendor $GOPATH/src/$DEPPACKAGE/ $CURPATH/vendor/$DEPPACKAGE/
		else
			echo "Cloning non existent nexgen package: $OWNERNAME/$REPONAME"
			mkdir -p $GOPATH/src/$DEPPACKAGE
			cd $GOPATH/src/$DEPPACKAGE
			git clone ssh://git@git.nexgen.neustar.biz:8022/$OWNERNAME/$REPONAME.git
			UPDATEDPACKAGES+=("$DEPPACKAGE")
		fi

	fi
done

UPDATE=""
if [ "$1" == "--update" ]; then
	UPDATE="-u"
fi
if [ -d vendor ]; then
	for dist in `ls $CURPATH/vendor/`; do
		if [ "$dist" != "git.nexgen.neustar.biz" ]; then
			for owner in `ls $CURPATH/vendor/$dist/`; do
				if [ "$dist" == "gopkg.in" ]; then
					if [[ "$2" != "" && "$2" != "$owner" && "$2" != "`ls $CURPATH/vendor/$dist/$owner/`" ]]; then
						continue
					fi
					echo "Upgrading $dist/$owner"
					go get $UPDATE $dist/$owner
					rsync -a --del --exclude=.git --exclude=vendor $GOPATH/src/$dist/$owner/ $CURPATH/vendor/$dist/$owner/
					#cd $CURPATH/vendor/$dist/$owner && git pull
				else
					for pack in `ls $CURPATH/vendor/$dist/$owner/`; do 
						if [[ "$2" != "" && "$2" != "$pack"  ]]; then
							continue
						fi

						echo "Upgrading $dist/$owner/$pack"
						go get $UPDATE $dist/$owner/$pack
						rsync -a --del --exclude=.git --exclude=vendor $GOPATH/src/$dist/$owner/$pack/ $CURPATH/vendor/$dist/$owner/$pack/
						#cd $CURPATH/vendor/$dist/$owner/$pack && git pull
					done
				fi
			done						
		fi
	done
else
	echo "This is not a vendored go app."
fi

As an afterthought by one of my colleagues this should probably be called gv... although I prefer gov... cause why not govna