如何在本地安装作为github.com地址引用的Golang包

Question

我在Go代码中引用了一个包为：

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

但是，在构建用于设置集成测试的坞映像时，我需要包括对该库的一些本地更改。

在我的Dockerfile中，我设置了GOPATH和GOROOT，路径如下：

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Docker映像中，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，当我试图通过运行以下行来构建引用github.com/apache/pulsar/pulsar-function-go/pf的文件时：

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

我收到这条异常信息：

运行在"github.com/apache/pulsar/pulsar-function-go/pf“示例中的

--运行于bb3ec43f7fea示例/go-示例/惊叹Func.go:24:2:无法在以下任何一个中找到包：/usr/local/go/src/github.com/apache/pulsar/pulsar-function-go/pf (来自$GOROOT) /go/src/github.com/apache/pulsar/pulsar-function-go/pf (来自$GOPATH)

是否有一种方法可以允许我使用该包的本地安装版本，而不需要更改我试图构建的代码中的引用？

编辑这里是我尝试过的其他一切：

当我运行go安装在脉冲星-function，我得到：

cannot find module for path .

当我在脉冲星-function/pf中运行go安装时，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)

当我尝试跑步时：

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

当我尝试跑步时：

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

如果我尝试运行这个来首先获得一些依赖项：

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

它成功了。如果我在Dockerfile中这样做的话：

# 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

要用本地代码替换pulsar-function文件的源代码，那么当我试图构建二进制文件时，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文件中，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，我被告知我可以在Go模块中插入一个replace指令，以便在为测试构建Go二进制文件时能够指向本地文件。然而，我认为我不能正确地安装模块，可能是由于脉冲星函数go/示例包含在模块中的方式。因此，我无法确定将什么设置为/local/path/to/package，因为我无法成功地安装软件包。(也许我也对此感到困惑？)

是否有更好的方法来构造模块/代码，以便能够在测试码头映像中安装本地脉冲星功能-go模块？

如果您想自己查看Go代码，请在这里查看：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，并在其中包含一个针对您所引用的包的replace指令：

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