引入外部package出錯
package golang.org/x/tools/cmd/goimports: unrecognized import path "golang.org/x/tools/cmd/goimports" (https fetch: Get https://golang.org/x/tools/cmd/goimports?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)
根據安裝文檔檢查PATH
sudo vim profile
發現是ok的,排除此可能, 直接stackoverflow查是否有類似問題