docker - 如何在本地安装引用为 github.com 地址的 Golang 包

Question

我有一个包，我在我的 Go 代码中引用为:

github.com/apache/pulsar/pulsar-function-go/pf

但是，在构建 docker 镜像以设置集成测试时，我需要对该库进行一些本地更改。

在我的 Dockerfile 中，我设置了 GOPATH 和 GOROOT 和 PATH，如下所示:

ENV GOROOT /usr/local/go
ENV GOPATH /go
ENV PATH /go/bin:$PATH

然后，在 Dockerfile 中，我将源代码复制到我的 Docker 镜像中并尝试安装 Go 模块，如下所示:

COPY target/pulsar-function-go/ /pulsar/dependencies/pulsar-function-go/
RUN cd /pulsar/dependencies/pulsar-function-go/pf && go install .

但是，当我尝试构建一个引用 github.com/apache/pulsar/pulsar-function-go/pf 的文件时通过运行这一行:
RUN go build -o /pulsar/examples/go-examples/exclamationFunc /pulsar/examples/go-examples/exclamationFunc.go
我收到此异常消息:

---> Running in bb3ec43f7fea examples/go-examples/exclamationFunc.go:24:2: cannot find package "github.com/apache/pulsar/pulsar-function-go/pf" in any of: /usr/local/go/src/github.com/apache/pulsar/pulsar-function-go/pf (from $GOROOT) /go/src/github.com/apache/pulsar/pulsar-function-go/pf (from $GOPATH)

有没有办法让我使用同一个包的本地安装版本，而无需更改我正在尝试构建的代码中的引用？

编辑这是我尝试过的所有其他内容:

当我在 pulsar-function-go 中运行 go install 时，我得到:

cannot find module for path .

当我在 pulsar-function-go/pf 中运行 go install 时，我得到:

examples/go-examples/exclamationFunc.go:24:2: cannot find package "github.com/apache/pulsar/pulsar-function-go/pf" in any of:
        /usr/local/go/src/github.com/apache/pulsar/pulsar-function-go/pf (from $GOROOT)
        /go/src/github.com/apache/pulsar/pulsar-function-go/pf (from $GOPATH)

当我尝试运行时:

RUN go get -t github.com/apache/pulsar/pulsar-function-go/...

(虽然这不会带来我的本地更改，但这只是为了测试)
我得到:

# github.com/apache/pulsar/pulsar-function-go/examples/test
/go/src/github.com/apache/pulsar/pulsar-function-go/examples/test/producer.go:30:6: main redeclared in this block
        previous declaration at /go/src/github.com/apache/pulsar/pulsar-function-go/examples/test/consumer.go:30:6
# github.com/apache/pulsar/pulsar-function-go/examples
/go/src/github.com/apache/pulsar/pulsar-function-go/examples/hello.go:32:6: main redeclared in this block
        previous declaration at /go/src/github.com/apache/pulsar/pulsar-function-go/examples/contextFunc.go:36:6
/go/src/github.com/apache/pulsar/pulsar-function-go/examples/inputFunc.go:34:6: main redeclared in this block
        previous declaration at /go/src/github.com/apache/pulsar/pulsar-function-go/examples/hello.go:32:6
/go/src/github.com/apache/pulsar/pulsar-function-go/examples/outputFunc.go:33:6: main redeclared in this block
        previous declaration at /go/src/github.com/apache/pulsar/pulsar-function-go/examples/inputFunc.go:34:6

当我尝试运行时:

RUN go get -t github.com/apache/pulsar/pulsar-function-go

我得到:

package github.com/apache/pulsar/pulsar-function-go: no Go files in /go/src/github.com/apache/pulsar/pulsar-function-go

如果我尝试运行它以首先获取一些依赖项:

RUN go get -t github.com/apache/pulsar/pulsar-function-go/pf

它成功了。如果我在我的 Dockerfile 中遵循以下内容:

# after using Maven plugin to copy files from the pulsar-function-go source directory to target/pulsar-function-go
COPY target/pulsar-function-go/ /go/src/github.com/apache/pulsar/pulsar-function-go
RUN cd /go/src/github.com/apache/pulsar/pulsar-function-go/pf && go install

用我的本地代码替换 docker 文件中 pulsar-function-go 的源代码，然后当我尝试构建二进制文件时，如下所示:

RUN go build -o /pulsar/examples/go-examples/exclamationFunc /pulsar/examples/go-examples/exclamationFunc.go

我得到:

/go/src/github.com/apache/pulsar/pulsar-function-go/pb/InstanceCommunication.pb.go:29:2: cannot find package "google.golang.org/grpc" in any of:
        /usr/local/go/src/google.golang.org/grpc (from $GOROOT)
        /go/src/google.golang.org/grpc (from $GOPATH)
/go/src/github.com/apache/pulsar/pulsar-function-go/pb/InstanceCommunication.pb.go:30:2: cannot find package "google.golang.org/grpc/codes" in any of:
        /usr/local/go/src/google.golang.org/grpc/codes (from $GOROOT)
        /go/src/google.golang.org/grpc/codes (from $GOPATH)
/go/src/github.com/apache/pulsar/pulsar-function-go/pb/InstanceCommunication.pb.go:31:2: cannot find package "google.golang.org/grpc/status" in any of:
        /usr/local/go/src/google.golang.org/grpc/status (from $GOROOT)
        /go/src/google.golang.org/grpc/status (from $GOPATH)
12:13

google.golang.org/grpc 包包含在 go.mod 中文件，如下所示:

module github.com/apache/pulsar/pulsar-function-go
go 1.13
require (
    github.com/apache/pulsar-client-go v0.0.0-20200116214305-4d788d9935ed
    github.com/golang/protobuf v1.3.2
    github.com/sirupsen/logrus v1.4.1
    github.com/stretchr/testify v1.3.0
    golang.org/x/tools v0.0.0-20200119215504-eb0d8dd85bcc // indirect
    google.golang.org/grpc v1.26.0
    gopkg.in/yaml.v2 v2.2.2
)

从下面的答案中，我被告知我可以插入 replace Go 模块中的指令允许我们在为测试构建 Go 二进制文件时指向本地文件。
但是，我认为我无法正确安装模块，这可能是由于模块中包含 pulsar-function-go/examples 的方式。
所以，我不知道设置为/local/path/to/package因为我无法成功安装软件包。 (也许我也对此感到困惑？)

有没有更好的方法来构建模块/代码，以便将本地 pulsar-function-go 模块安装到测试 Docker 镜像中？

如果您想自己查看 Go 代码，请在此处查看:https://github.com/apache/pulsar/tree/master/pulsar-function-go
Dockerfile 在这里:https://github.com/apache/pulsar/blob/master/tests/docker-images/latest-version-image/Dockerfile

Answer 1

为您的项目使用 go 模块，并包含 replace您要引用的包的指令:

replace github.com/apache/pulsar/pulsar-function-go/pf => /local/path/to/package