魔术公式 安装迁移工具 $ go get -u -d github.com/golang-migrate/migrate/v4/cmd/migrate $ cd $GOPATH/src/github.com/golang-migrate/migrate/cmd/migrate $ git checkout $TAG # e.g. v4.1.0 $ go build -tags 'postgres' -ldflags="-X main.Version=$(git describe --t