使用供应商目录中的本地依赖项时出现编译错误答案

【问题标题】：Compilation error when using local dependencies from vendor directory使用供应商目录中的本地依赖项时出现编译错误
【发布时间】：2020-04-04 23:30:47
【问题描述】：

构建（失败）：

GO111MODULE=off go build -o diameter

[pceuser@pincb-brm02 src]$ echo $GOPATH

/home/pceuser/policy-control-engine

[pceuser@pincb-brm02 src]$ pwd

/home/pceuser/policy-control-engine/src

[pceuser@pincb-brm02 src]$ ls

backupgx config.go data.csv go.mod gx.go model.go README redis_test.go stats.go ccr.go config.yml 直径 go.sum Makefile pcediam redis.go server.go vendor

[pceuser@pincb-brm02 src]$ cd vendor
[pceuser@pincb-brm02 vendor]$ ls

github.com golang.org gopkg.in modules.txt

构建错误：

ccr.go:8:2: cannot find package
"github.com/fiorix/go-diameter/v4/diam" in any of:
    /usr/local/go/src/github.com/fiorix/go-diameter/v4/diam (from
$GOROOT)
    /home/pceuser/policy-control-engine/src/github.com/fiorix/go-diameter/v4/diam
(from $GOPATH)

ccr.go:9:2: cannot find package
"github.com/fiorix/go-diameter/v4/diam/avp" in any of:
    /usr/local/go/src/github.com/fiorix/go-diameter/v4/diam/avp (from
$GOROOT)
    /home/pceuser/policy-control-engine/src/github.com/fiorix/go-diameter/v4/diam/avp
(from $GOPATH)

gx.go:11:2: cannot find package
"github.com/fiorix/go-diameter/v4/diam/datatype" in any of:
    /usr/local/go/src/github.com/fiorix/go-diameter/v4/diam/datatype
(from $GOROOT)
    /home/pceuser/policy-control-engine/src/github.com/fiorix/go-diameter/v4/diam/datatype
(from $GOPATH)

ccr.go:6:2: cannot find package
"github.com/fiorix/go-diameter/v4/diam/sm" in any of:
    /usr/local/go/src/github.com/fiorix/go-diameter/v4/diam/sm (from
$GOROOT)
    /home/pceuser/policy-control-engine/src/github.com/fiorix/go-diameter/v4/diam/sm
(from $GOPATH)

redis.go:6:2: cannot find package "github.com/go-redis/redis" in any
of:     /usr/local/go/src/github.com/go-redis/redis (from $GOROOT)
    /home/pceuser/policy-control-engine/src/github.com/go-redis/redis
(from $GOPATH)

config.go:6:9: cannot find package "gopkg.in/yaml.v2" in any of:
    /usr/local/go/src/gopkg.in/yaml.v2 (from $GOROOT)
    /home/pceuser/policy-control-engine/src/gopkg.in/yaml.v2 (from
$GOPATH)

注意：我在我的 https://github.com/fiorix/go-diameter 中做了一些更改供应商依赖文件夹，但我仍然无法编译它。

【问题讨论】：

你试过go build -mod=vendor吗？这将从 vendor 包中加载您的依赖项，而不是在全局 GOPATH 中找到它们
您可以尝试一些技巧，甚至可能会奏效，但要真正了解它发生的确切原因，我需要一些额外的信息。您能否检查一下供应商目录中是否存在上述软件包。另外，分享go env 和go version 的输出。

标签： go go-modules

【解决方案1】：

如果您在GOPATH 之外并且不使用go modules 并且仍在尝试使用vendor 文件夹编译您的项目，那么值得一试：

go build -mod=vendor

这可以防止在全局 GOPATH 中查找依赖项，并将直接从 vendor 文件夹加载您的依赖项。

【讨论】：