golang通过go mod管理项目依赖。
通常，我们从github等项目托管平台拉取依赖go module。
例如：go get -u github.com/kataras/iris/v12
假如，公司有内网gitlab托管项目代码，如何从私有仓库拉取依赖？
假设，公司的内网gitlab地址是：gitlab.xxx.com，是yyy团队下的test1280仓库。
1.设置GOPRIVATE
设置windows中的环境变量：GOPRIVATE
重启GoLand，并打开Terminal终端查看：
C:UsersEBDesktoptest1281>go env set GO111MODULE=on set GOARCH=amd64 set GOBIN= set GOCACHE=C:UsersEBAppDataLocalgo-build set GOENV=C:UsersEBAppDataRoaminggoenv set GOEXE=.exe set GOFLAGS= set GOHOSTARCH=amd64 set GOHOSTOS=windows set GOINSECURE= set GOMODCACHE=D:workspacegopathpkgmod set GONOPROXY=gitlab.xxx.com set GONOSUMDB=gitlab.xxx.com set GOOS=windows set GOPATH=D:workspacegopath set GOPRIVATE=gitlab.xxx.com set GOPROXY=https://goproxy.io set GOROOT=C:Program FilesGo set GOSUMDB=off set GOTMPDIR= set GOTOOLDIR=C:Program FilesGopkgtoolwindows_amd64 set GOVCS= set GOVERSION=go1.16.4 set GCCGO=gccgo set AR=ar set CC=gcc set CXX=g++ set CGO_ENABLED=1 set GOMOD=C:UsersEBDesktoptest1281go.mod set CGO_CFLAGS=-g -O2 set CGO_CPPFLAGS= set CGO_CXXFLAGS=-g -O2 set CGO_FFLAGS=-g -O2 set CGO_LDFLAGS=-g -O2 set PKG_CONFIG=pkg-config set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0 -fdebug-prefix-map=C:UsersEBAppDataLocalTempgo-build1897173819=/tmp/go-build -gno-record- gcc-switches
注意：
a.如果windows设置GOPRIVATE，则自动设置GONOPROXY、GONOSUMDB。
b.不设置windows用户变量，仅设置GoLand项目配置也可以。
2.go get拉取私有仓库module
在终端执行：go get -v -x gitlab.xxx.com/yyy/test1280
提示输入gitlab鉴权的用户名称、密码：
C:UsersEBDesktoptest1281>go get -v -x gitlab.xxx.com/yyy/test1280
# get https://gitlab.xxx.com/?go-get=1
# get https://gitlab.xxx.com/yyy?go-get=1
# get https://gitlab.xxx.com/yyy/test1280?go-get=1
# get https://gitlab.xxx.com/yyy/test1280?go-get=1: 200 OK (0.130s)
get "gitlab.xxx.com/yyy/test1280": found meta tag vcs.metaImport{Prefix:"gitlab.xxx.com/yyy/test1280", VCS:"git", RepoRoot:"https://gitl
ab.xxx.com/yyy/test1280.git"} at //gitlab.xxx.com/yyy/test1280?go-get=1
mkdir -p D:workspacegopathpkgmodcachevcs # git3 https://gitlab.xxx.com/yyy/test1280.git
# lock D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7.lock# D:workspacegopathpkgmod
cachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7 for git3 https://gitlab.xxx.com/yyy/test1280.git
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git ls-remote -q origin
# get https://gitlab.xxx.com/?go-get=1: 200 OK (0.248s)
# get https://gitlab.xxx.com/yyy?go-get=1: 200 OK (0.259s)
68.605s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git ls-remote -q origin
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git -c log.showsignature=false log -n
1 '--format=format:%H %ct %D' 30ab8436b395a56b16fc3074ea2d0458e6de720b --
0.144s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git -c log.showsignature=fal
se log -n1 '--format=format:%H %ct %D' 30ab8436b395a56b16fc3074ea2d0458e6de720b --
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git tag -l
0.096s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git tag -l
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git fetch -f --depth=1 origin 30ab843
6b395a56b16fc3074ea2d0458e6de720b:refs/dummy
1.970s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git fetch -f --depth=1 origi
n 30ab8436b395a56b16fc3074ea2d0458e6de720b:refs/dummy
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git -c log.showsignature=false log -n
1 '--format=format:%H %ct %D' 30ab8436b395a56b16fc3074ea2d0458e6de720b --
0.068s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git -c log.showsignature=fal
se log -n1 '--format=format:%H %ct %D' 30ab8436b395a56b16fc3074ea2d0458e6de720b --
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b395a56b16f
c3074ea2d0458e6de720b:go.mod
0.052s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b3
95a56b16fc3074ea2d0458e6de720b:go.mod
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git for-each-ref --format %(refname)
refs/tags --merged 30ab8436b395a56b16fc3074ea2d0458e6de720b
0.045s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git for-each-ref --format %(
refname) refs/tags --merged 30ab8436b395a56b16fc3074ea2d0458e6de720b
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git for-each-ref --format %(refname)
refs/tags --merged 30ab8436b395a56b16fc3074ea2d0458e6de720b
0.044s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git for-each-ref --format %(
refname) refs/tags --merged 30ab8436b395a56b16fc3074ea2d0458e6de720b
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git -c log.showsignature=false log -n
1 '--format=format:%H %ct %D' 30ab8436b395 --
0.043s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git -c log.showsignature=fal
se log -n1 '--format=format:%H %ct %D' 30ab8436b395 --
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b395a56b16f
c3074ea2d0458e6de720b:go.mod
0.041s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b3
95a56b16fc3074ea2d0458e6de720b:go.mod
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b395a56b16f
c3074ea2d0458e6de720b:go.mod
0.072s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b3
95a56b16fc3074ea2d0458e6de720b:go.mod
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b395a56b16f
c3074ea2d0458e6de720b:go.mod
0.043s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b3
95a56b16fc3074ea2d0458e6de720b:go.mod
go: downloading gitlab.xxx.com/yyy/test1280 v0.0.0-20210709084921-30ab8436b395
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b395a56b16f
c3074ea2d0458e6de720b:go.mod
0.060s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b3
95a56b16fc3074ea2d0458e6de720b:go.mod
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b395a56b16f
c3074ea2d0458e6de720b:go.mod
0.041s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git cat-file blob 30ab8436b3
95a56b16fc3074ea2d0458e6de720b:go.mod
cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git -c core.autocrlf=input -c core.eo
l=lf archive --format=zip --prefix=prefix/ 30ab8436b395a56b16fc3074ea2d0458e6de720b
0.049s # cd D:workspacegopathpkgmodcachevcs52b930c57b03f37a1dd325269e9a6fa1e8925ecd9255ff40da8f04ff278ba5e7; git -c core.autocrlf=input -
c core.eol=lf archive --format=zip --prefix=prefix/ 30ab8436b395a56b16fc3074ea2d0458e6de720b
WORK=C:UsersEBAppDataLocalTempgo-build4264731656
gitlab.xxx.com/yyy/test1280
mkdir -p $WORKb001
cat >$WORKb001importcfg << 'EOF' # internal
# import config
packagefile fmt=C:Program FilesGopkgwindows_amd64fmt.a
EOF
cd C:UsersEBDesktoptest1281
"C:\Program Files\Go\pkg\tool\windows_amd64\compile.exe" -o "$WORK\b001\_pkg_.a" -trimpath "$WORK\b001=>" -p gitlab.xxx.com/yyy/tes
t1280 -lang=go1.16 -complete -buildid qNUpqkNuqz_1UjHCaxjB/qNUpqkNuqz_1UjHCaxjB -goversion go1.16.4 -D "" -importcfg "$WORK\b001\importcfg" -p
ack -c=4 "D:\workspace\gopath\pkg\mod\gitlab.xxx.com\yyy\test1280@v0.0.0-20210709084921-30ab8436b395\test1280.go"
"C:\Program Files\Go\pkg\tool\windows_amd64\buildid.exe" -w "$WORK\b001\_pkg_.a" # internal
cp "$WORK\b001\_pkg_.a" "C:\Users\EB\AppData\Local\go-build\bb\bbf4455401e93ebea348106585f9c272029c30221e418cde126f3b41dc3c07db-d" # in
ternal
go get: added gitlab.xxx.com/yyy/test1280 v0.0.0-20210709084921-30ab8436b395
提示，新增依赖库成功：
go get: added gitlab.xxx.com/yyy/test1280 v0.0.0-20210709084921-30ab8436b395
在go get时，自动弹出提示框，要求输入gitlab的用户名称、密码。
输入之后，用户名称、密码将会存储在windows的凭据管理器中：
win+s打开搜索框，输入“凭据管理器”：
后续如果我们再次拉取内网gitlab的仓库时，系统会自动帮我们填充认证。
3.ssh方式免密拉取
考虑一个问题：
假设gitlab的用户密码每天更新，每天都设置一次windows凭据管理器实在繁琐低效。
是否有更好的办法解决？
可设置windows用户公钥由gitlab信任，然后用户通过ssh免密拉取gitlab的代码仓库。
如何生成和设置windows用户公钥请查看：
https://blog.csdn.net/test1280/article/details/118608774
设置完成后，我们就可以使用ssh免密拉取gitlab的代码仓库。
但是！go mod使用的是git http协议而非git ssh协议。
需要设置git配置：
git config --global url."git@gitlab.xxx.com:".insteadof "https://gitlab.xxx.com/"
其中，gitlab.xxx.com需要替换成内部域名或IP地址。
一切都没问题了吗？4.更好的方案
当内网gitlab的ssh服务端口非ssh默认端口22时，将出现问题：
即使设置：
git config --global url."git@gitlab.xxx.com:10000".insteadof "https://gitlab.xxx.com/"
（其中，10000是内部gitlab的ssh服务端口）
实际测试，设置的10000端口并没有生效，go get调用git时，使用的仍然是22端口。
更好的方法是，通过设置netrc来实现git http的免密，参考：
重点是！https://blog.csdn.net/test1280/article/details/118613074
我们可以从gitlab设置访问令牌，作为我们的永久密码存储到netrc中：
即使gitlab用户密码发生变化，gitlab生成的访问令牌仍然有效，我们不必修改netrc。
5.总结
从内网gitlab拉取私有仓库module，至少有三种方式：
- 设置netrc实现git http免密
- 设置gitlab信任ssh公钥，通过git config实现git ssh替代git http免密
- 设置windows凭据管理器
推荐使用：gitlab生成访问令牌+设置netrc。
6.参考
https://blog.zhaoweiguo.com/2019/09/24/golang-env-private-git/
https://www.cnblogs.com/lion.net/p/10408505.html
