go delve安裝

一、安裝
照着 github 上 delve 項目的安裝說明操作，go mod模式下推薦使用第二種方式。
1.拉取最新 delve 項目代碼到本地，編譯安裝。

# cd $GOPATH/src/
# git clone https://github.com/derekparker/delve.git
# cd delve/cmd/dlv/
# go build
# go install

國內環境go build會報錯：

go: golang.org/x/crypto@v0.0.0-20180614174826-fd5f17ee7299: unrecognized import path "golang.org/x/crypto" (https fetch: Get https://golang.org/x/crypto?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)
go: golang.org/x/sys@v0.0.0-20180614134839-8883426083c0: unrecognized import path "golang.org/x/sys" (https fetch: Get https://golang.org/x/sys?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)
go: golang.org/x/arch@v0.0.0-20171004143515-077ac972c2e4: unrecognized import path "golang.org/x/arch" (https fetch: Get https://golang.org/x/arch?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)

原因是 Golang 官網被牆了，這里手動修改go.mod文件，把項目地址替換為 github 上的地址，如：

# vim ../../go.mod
# 添加下面替換：
replace (
        golang.org/x/arch v0.0.0-20171004143515-077ac972c2e4 => github.com/golang/arch v0.0.0-20171004143515-077ac972c2e4
        |golang.org/x/crypto v0.0.0-20180614174826-fd5f17ee7299 => github.com/golang/crypto v0.0.0-20180614174826-fd5f17ee7299
        |golang.org/x/sys v0.0.0-20180614134839-8883426083c0 => github.com/golang/sys v0.0.0-20180614134839-8883426083c0
)
如下圖