入口文件:Makefile 指定编译对象(geth为例),直接调用build/env.sh,初始化一些环境,然后直接调用go run build/ci.go install ./cmd/geth 运行ci.go,ci.go被当作编译脚本使用,拼接编译字符串,geth为例,得到编译字符串:
cmd: 0(string) "/usr/local/go/bin/go" 1(string) "install" 2(string) "-ldflags" 3(string) "-X main.gitCommit=7e8988470090554fbedd46b6d50df8cd30ab085d" 4(string) "-v" 5(string) "./cmd/geth"
即:go install -ldflags -X main.gitCommit=7e8988470090554fbedd46b6d50df8cd30ab085d -v ./cmd/geth
即编译./cmd/geth工程