MAJOR_GOVERSION=$( go version | grep -o 'go1\.[0-9]')
FULL_GOVERSION=$( go version| grep -o 'go1\.[0-9|\.]*' )

# The list of unsupported major go versions.
UNSUPPORTED=( "go1.0" "go1.1" "go1.2" "go1.3" "go1.4" )

# Minor go verisons which have known security vulnerabilities. Refuse to build with these.
KNOWN_INSECURE=( "go1.5" "go1.5.1" "go1.5.2" )

for V in "${UNSUPPORTED[@]}"; do
    if [ "$V" = "$MAJOR_GOVERSION" ]; then
        echo "dex requires Go version 1.5.3+. Please update your Go version."
        exit 2
    fi
done

for V in "${KNOWN_INSECURE[@]}"; do
    if [ "$V" = "$FULL_GOVERSION" ]; then
        echo "Go version ${V} has known security vulnerabilities which impact dex. Plesae update your Go verison."
        exit 2
    fi
done

export GO15VENDOREXPERIMENT=1
export VERSION=$(./git-version)
LD_FLAGS="-X main.version=${VERSION}"